CN114163866B - Neutral deinking agent for office printing waste paper, preparation method and application - Google Patents
Neutral deinking agent for office printing waste paper, preparation method and application Download PDFInfo
- Publication number
- CN114163866B CN114163866B CN202111454849.2A CN202111454849A CN114163866B CN 114163866 B CN114163866 B CN 114163866B CN 202111454849 A CN202111454849 A CN 202111454849A CN 114163866 B CN114163866 B CN 114163866B
- Authority
- CN
- China
- Prior art keywords
- parts
- waste paper
- deinking agent
- polyoxyethylene
- water
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D9/00—Chemical paint or ink removers
- C09D9/04—Chemical paint or ink removers with surface-active agents
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
- D21B1/00—Fibrous raw materials or their mechanical treatment
- D21B1/04—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres
- D21B1/12—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by wet methods, by the use of steam
- D21B1/30—Defibrating by other means
- D21B1/32—Defibrating by other means of waste paper
- D21B1/325—Defibrating by other means of waste paper de-inking devices
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
- D21B1/00—Fibrous raw materials or their mechanical treatment
- D21B1/04—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres
- D21B1/12—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by wet methods, by the use of steam
- D21B1/30—Defibrating by other means
- D21B1/32—Defibrating by other means of waste paper
- D21B1/325—Defibrating by other means of waste paper de-inking devices
- D21B1/327—Defibrating by other means of waste paper de-inking devices using flotation devices
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
- D21B1/00—Fibrous raw materials or their mechanical treatment
- D21B1/04—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres
- D21B1/12—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by wet methods, by the use of steam
- D21B1/30—Defibrating by other means
- D21B1/34—Kneading or mixing; Pulpers
- D21B1/345—Pulpers
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C5/00—Other processes for obtaining cellulose, e.g. cooking cotton linters ; Processes characterised by the choice of cellulose-containing starting materials
- D21C5/02—Working-up waste paper
- D21C5/022—Chemicals therefor
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C5/00—Other processes for obtaining cellulose, e.g. cooking cotton linters ; Processes characterised by the choice of cellulose-containing starting materials
- D21C5/02—Working-up waste paper
- D21C5/025—De-inking
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/64—Paper recycling
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Mechanical Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Paper (AREA)
Abstract
The invention provides a neutral deinking agent for office printing waste paper, a preparation method and application, wherein the neutral deinking agent comprises the following components in parts by weight: 20-25 parts of polyoxyethylene myristate, 10-15 parts of p-tert-octylphenyl polyoxyethylene ether, 10-15 parts of myristyl alcohol polyoxyethylene ether, 15-20 parts of sodium dodecyl sulfonate, 5-10 parts of phenol polyoxyethylene polyoxypropylene ether, 5-10 parts of ethanol and 10-30 parts of water. The preparation method comprises the following steps: mixing and heating phenol polyoxyethylene polyoxypropylene ether, ethanol and water according to the weight parts of the deinking agent, adding sodium dodecyl sulfate, and stirring until the mixture is completely dissolved; sequentially adding the polyoxyethylene myristate, the p-tert-octylphenyl polyoxyethylene ether and the polyoxyethylene myristate, stirring and mixing. The deinking agent can make ultraviolet light solidified ink, laser printing and electrostatic copying ink, water ink and other new ink stripped from office printing waste paper fiber easily.
Description
Technical Field
The invention relates to the technical field of recycling of waste printing materials, in particular to a neutral deinking agent for office printing waste paper, a preparation method and application thereof.
Background
Over the past 30 years, waste paper recycling technologies have been greatly developed due to environmental pressures and economic benefits of waste paper utilization. According to the related report, if the waste paper can be effectively utilized as the secondary fiber paper, the energy source can be saved by 60% -70%, the investment can be saved by 2/3, and the atmospheric pollution in the environment can be reduced by 60% -70%. Meanwhile, the method can also protect forest resources in China, reduce the papermaking cost and improve the international competitiveness of the papermaking industry in China.
Along with standardization and science and technology of office equipment, office waste paper is mostly concentrated into office printing paper with high whiteness at present, if the deinking technology is continuously innovated, considerable amounts of reconstituted high-quality office printing paper can be obtained each year, and environmental protection benefit and resource recycling benefit are further improved. With the development of printing technology, in the present office printing waste paper, novel ink such as ultraviolet light curing ink, laser printing and electrostatic copying ink, water-based ink and the like account for a considerable proportion, and the removal effect of the ink by a common deinking agent is not ideal. Moreover, deinking waste paper is a complex process in which surfactants, due to their own properties, distribute different roles, mainly as deinking agents, capturing agents, dispersants, etc., to separate ink from fibers.
At present, most of waste paper deinking industry in China adopts an alkaline deinking method, namely an alkaline deinking agent. The method comprises the steps of curing, deinking, dispersing, disintegrating and the like of waste paper pulp at a certain temperature, separating ink particles from fibers under the action of a surfactant, and then carrying out the procedures of dilution, flotation, washing or flotation and washing on the deinked pulp to finally obtain the deinked pulp. The alkaline deinking process is mature and has high deinking efficiency, but the alkaline deinking process has a plurality of defects. For example, the deinking method is carried out in a strong alkaline environment, and the BOD and COD of the strong alkaline deinking waste water formed after deinking are high, so that the waste water treatment difficulty is increased, and if the waste water is directly discharged into the nature without treatment, huge pollution is caused to the ecological environment, and the scientific development concepts of energy conservation and emission reduction, green environmental protection and the like are seriously violated; meanwhile, the strong alkalinity easily causes the problem of 'alkaline blackening' of the paper pulp in the deinking process, and affects the whiteness of the paper pulp. Therefore, there is a need for further development of new deinking agents to better achieve deinking effects of printed waste paper and maximum utilization of resources.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a neutral deinking agent for office printing waste paper, a preparation method and application thereof, and the deinking agent avoids the problems of large corrosiveness and environmental pollution caused by using an alkaline deinking agent in the prior art, and has good deinking effect. The technical scheme of the invention is as follows:
the neutral deinking agent for office printing waste paper comprises the following components in parts by weight: 20-25 parts of polyoxyethylene myristate, 10-15 parts of p-tert-octylphenyl polyoxyethylene ether, 10-15 parts of myristyl alcohol polyoxyethylene ether, 15-20 parts of sodium dodecyl sulfonate, 5-10 parts of phenol polyoxyethylene polyoxypropylene ether, 5-10 parts of ethanol and 10-30 parts of water.
Preferably, the neutral deinking agent comprises the following components in parts by weight: 20-22 parts of polyoxyethylene myristate, 12-15 parts of p-tert-octylphenyl polyoxyethylene ether, 13-15 parts of myristyl alcohol polyoxyethylene ether, 17 parts of sodium dodecyl sulfonate, 5-10 parts of phenol polyoxyethylene polyoxypropylene ether, 10 parts of ethanol and 14-20 parts of water.
Further preferably, the neutral deinking agent comprises the following components in parts by weight: 22 parts of polyoxyethylene myristate, 12 parts of p-tert-octylphenyl polyoxyethylene ether, 15 parts of myristyl alcohol polyoxyethylene ether, 17 parts of sodium dodecyl sulfonate, 10 parts of phenol polyoxyethylene polyoxypropylene ether, 10 parts of ethanol and 14 parts of water.
In a second aspect, the present invention provides a method for preparing the deinking agent, comprising the steps of:
step 1: mixing and heating phenol polyoxyethylene polyoxypropylene ether, ethanol and water to 40-50 ℃ according to the weight parts of the deinking agent, adding sodium dodecyl sulfate, and stirring at a stirring speed of 400r/min +/-20 until the mixture is completely dissolved;
step 2: reducing the stirring speed to 200 r/min+/-20, sequentially adding the polyoxyethylene myristate, the p-tert-octylphenyl polyoxyethylene ether and the myristyl alcohol polyoxyethylene ether, fully dissolving, continuously stirring for 50-70 min at the stirring speed of 200 r/min+/-20, standing, and naturally cooling to obtain the modified polyvinyl alcohol.
In a third aspect, the present invention provides a deinking method for office printed waste paper, which is a neutral deinking agent obtained by using the neutral deinking agent or the preparation method, the method comprising the steps of:
(1) The office printing waste paper is processed into fragments, then added into a pulper together with water, and added into the neutral deinking agent for disintegrating treatment;
(2) Diluting the crushed paper pulp with water until the concentration of the paper pulp is 0.5-1.5%, and floating by a flotation machine for 5-20 min;
(3) And pouring the paper pulp into a pulp bag after flotation is finished, and washing through a copper mesh of 80-100 meshes to finish the deinking process.
Further, the control parameters of the crushing process are as follows: the addition amount of the neutral deinking agent is 0.1-3.0% of the mass percentage concentration of the neutral deinking agent in the system, 5-15% of the crushed pulp, the temperature is 30-70 ℃, the pre-soaking time is 10-60 min, the crushed pulp time is 10-30 min, and the heat preservation time is 10-60 min.
Preferably, the control parameters of the decomposition process are: the addition amount of the neutral deinking agent is 2.5 percent of the mass concentration of the neutral deinking agent in the system, 15 percent of the crushed pulp, the temperature is 55 ℃, the pre-soaking time is 40min, the crushed pulp time is 30min, and the heat preservation time is 10min.
Preferably, the disintegrated pulp is diluted with water to a pulp consistency of 1.2%.
The percentages are weight percentages.
Preferably, the time for flotation using a flotation machine is 10 minutes.
Further, the ink particle removal rate of the office printing waste paper is not lower than 90%, and the hundred degree increase rate is not lower than 10%.
The invention has the technical advantages that:
firstly, the myristic acid polyoxyethylene ether adopted by the invention is obtained by ethoxylation of myristic acid, is safe and nontoxic, and has the characteristics of strong surface activity and low surface tension. The p-tert-octyl phenyl polyoxyethylene ether and the myristyl alcohol polyoxyethylene ether are nonionic surfactants, so that the water solubility and the stability are good, the surface tension is low, the wettability is good, the emulsifying property is good, the deinking effect of waste paper is improved, meanwhile, the removed ink can be rapidly dispersed in water, and the removed ink can be conveniently removed during subsequent mechanical disintegration, floatation and cleaning. The sodium dodecyl sulfonate belongs to an anionic surfactant, is easy to dissolve in water, is compounded with anionic and nonionic surfactants, fully exerts good emulsifying, foaming, penetrating, decontaminating and dispersing performances, can quickly penetrate into a bonding interface between the ink and the fiber, weakens the bonding force between the ink and the fiber, and ensures that the ink particles are helpful to be peeled from the paper fiber. The combination of the phenol polyoxyethylene polyoxypropylene ether and the ethanol can reduce the freezing point of the deinking agent, so that the product becomes a liquid deinking agent with high solid content, and the application range is wider. Experiments show that the deinking agent can be used for easily stripping novel ink such as ultraviolet light curing ink, laser printing, electrostatic copying ink, water-based ink and the like from office printing waste paper fibers.
Secondly, in the use process of the deinking agent, the problems of strong alkalinity, high corrosiveness, high environmental pollution and the like of deinking wastewater caused by using strong alkaline components such as NaOH and the like in the conventional alkaline deinking process are avoided. On the other hand, the treatment difficulty of deinking wastewater is reduced, and the method has very important practical significance in the fields of energy conservation, emission reduction, environmental protection and the like. In addition, chelating compounds such as EDTA or DTPA and the like do not need to be added in the pulping process, so that the deinking cost is reduced.
Detailed Description
The polyoxyethylene myristate ether used in the examples of the present invention was obtained by the inventors by ethoxylation of myristic acid, and this process is prior art and will not be described in detail here.
In the description of the present invention, it is to be noted that the specific conditions are not specified in the examples, and the description is performed under the conventional conditions or the conditions recommended by the manufacturer. The reagents or apparatus used were conventional products commercially available without the manufacturer's attention.
The invention will now be described in further detail by way of the following specific examples, which are given by way of illustration and not limitation.
Example 1
The embodiment provides an office printing waste paper neutral deinking agent and a preparation method thereof, and the preparation method is as follows:
the office printing waste paper neutral deinking agent comprises the following components in parts by weight: 20 parts of polyoxyethylene myristate, 15 parts of p-tert-octylphenyl polyoxyethylene ether, 15 parts of myristyl alcohol polyoxyethylene ether, 15 parts of sodium dodecyl sulfonate, 5 parts of phenol polyoxyethylene polyoxypropylene ether, 5 parts of ethanol and 25 parts of water.
The preparation method of the office printing waste paper neutral deinking agent comprises the following steps:
1. weighing the components according to parts by weight;
2. pouring the weighed phenol polyoxyethylene polyoxypropylene ether, ethanol and water into a reaction kettle, heating to 50 ℃, adding sodium dodecyl sulfate, and stirring at a speed of 400r/min until the sodium dodecyl sulfate is completely dissolved; and (3) reducing the stirring speed to 200r/min, sequentially adding polyoxyethylene myristate, p-tert-octylphenyl polyoxyethylene ether and myristyl alcohol polyoxyethylene ether, fully dissolving, continuously stirring for 50min at the stirring speed of 200r/min, standing, and naturally cooling to obtain the office printing waste paper neutral deinking agent sample A.
The deinking method of the office printing waste paper neutral deinking agent sample A comprises the following steps:
1. cutting office printing waste paper into fragments, adding the fragments and water into a pulper after finishing, adding 0.1% office printing waste paper neutral deinking agent, controlling the pulp concentration to 5%, the temperature to 70 ℃, the pre-soaking time to 60min, the pulp crushing time to 30min and the heat preservation time to 60min. All the above are weight percentages;
2. diluting the crushed paper pulp with water until the concentration of the paper pulp is 0.5%, and floating for 20min by using a flotation machine;
3. after flotation, the pulp is poured into a pulp bag and washed by a copper mesh of 80 meshes. And (5) finishing the deinking process.
Example 2
The embodiment provides an office printing waste paper neutral deinking agent and a preparation method thereof, and the preparation method is as follows:
the office printing waste paper neutral deinking agent comprises the following components in parts by weight: 25 parts of polyoxyethylene myristate, 10 parts of p-tert-octylphenyl polyoxyethylene ether, 15 parts of myristyl alcohol polyoxyethylene ether, 15 parts of sodium dodecyl sulfonate, 10 parts of phenol polyoxyethylene polyoxypropylene ether, 5 parts of ethanol and 20 parts of water.
The preparation method of the office printing waste paper neutral deinking agent comprises the following steps:
1. weighing the components according to parts by weight;
2. pouring the weighed phenol polyoxyethylene polyoxypropylene ether, ethanol and water into a reaction kettle, heating to 40 ℃, adding sodium dodecyl sulfate, and stirring at a speed of 380r/min until the sodium dodecyl sulfate is completely dissolved; and (3) reducing the stirring speed to 180r/min, sequentially adding polyoxyethylene myristate, p-tert-octylphenyl polyoxyethylene ether and myristyl alcohol polyoxyethylene ether, fully dissolving, continuously stirring for 60min at the stirring speed of 220r/min, standing, and naturally cooling to obtain the office printing waste paper neutral deinking agent sample B.
The deinking method of the neutral deinking agent sample B for office printing waste paper comprises the following steps:
1. cutting office printing waste paper into fragments, adding the fragments and water into a pulper after finishing, adding 3.0% office printing waste paper neutral deinking agent, controlling the concentration of the pulper to be 10%, controlling the temperature to be 30 ℃, presoaking for 20min, pulping for 10min, and preserving the heat for 10min. All the above are weight percentages;
2. diluting the crushed paper pulp with water to the concentration of 1.2%, and floating for 5min by using a flotation machine;
3. after flotation, the pulp is poured into a pulp bag and washed by a copper mesh of 100 meshes. And (5) finishing the deinking process.
Example 3
The embodiment provides an office printing waste paper neutral deinking agent and a preparation method thereof, and the preparation method is as follows:
the office printing waste paper neutral deinking agent comprises the following components in parts by weight: 25 parts of polyoxyethylene myristate, 15 parts of p-tert-octylphenyl polyoxyethylene ether, 10 parts of myristyl alcohol polyoxyethylene ether, 18 parts of sodium dodecyl sulfonate, 7 parts of phenol polyoxyethylene polyoxypropylene ether, 5 parts of ethanol and 20 parts of water.
The preparation method of the office printing waste paper neutral deinking agent comprises the following steps:
1. weighing the components according to parts by weight;
2. pouring the weighed phenol polyoxyethylene polyoxypropylene ether, ethanol and water into a reaction kettle, heating to 45 ℃, adding sodium dodecyl sulfate, and stirring at a stirring speed of 415r/min until the sodium dodecyl sulfate is completely dissolved; and reducing the stirring speed to 210r/min, sequentially adding polyoxyethylene myristate, p-tert-octylphenyl polyoxyethylene ether and myristyl alcohol polyoxyethylene ether, fully dissolving, continuously stirring for 55min at the stirring speed of 180r/min, standing, and naturally cooling to obtain the office printing waste paper neutral deinking agent sample C.
The deinking method of the neutral deinking agent sample C for office printing waste paper comprises the following steps:
1. cutting office printing waste paper into fragments, adding the fragments and water into a pulper after finishing, adding 2% office printing waste paper neutral deinking agent, controlling the pulp concentration to 8%, the temperature to 45 ℃, the pre-soaking time to 25min, the pulp crushing time to 20min and the heat preservation time to 30min. All the above are weight percentages;
2. diluting the crushed paper pulp with water until the concentration of the paper pulp is 0.8%, and floating for 20min by using a flotation machine;
3. after flotation, the pulp is poured into a pulp bag and washed by a copper mesh of 90 meshes. And (5) finishing the deinking process.
Example 4
The embodiment provides an office printing waste paper neutral deinking agent and a preparation method thereof, and the preparation method is as follows:
the office printing waste paper neutral deinking agent comprises the following components in parts by weight: 22 parts of polyoxyethylene myristate, 12 parts of p-tert-octylphenyl polyoxyethylene ether, 15 parts of myristyl alcohol polyoxyethylene ether, 17 parts of sodium dodecyl sulfonate, 10 parts of phenol polyoxyethylene polyoxypropylene ether, 10 parts of ethanol and 14 parts of water.
The preparation method of the office printing waste paper neutral deinking agent comprises the following steps:
1. weighing the components according to parts by weight;
2. pouring the weighed phenol polyoxyethylene polyoxypropylene ether, ethanol and water into a reaction kettle, heating to 50 ℃, adding sodium dodecyl sulfate, and stirring at a speed of 400r/min until the sodium dodecyl sulfate is completely dissolved; and (3) reducing the stirring speed to 180r/min, sequentially adding polyoxyethylene myristate, p-tert-octylphenyl polyoxyethylene ether and myristyl alcohol polyoxyethylene ether, fully dissolving, continuously stirring for 55min at the stirring speed of 210r/min, standing, and naturally cooling to obtain the office printing waste paper neutral deinking agent sample D.
The deinking method using the office printing waste paper neutral deinking agent sample D comprises the following steps:
1. cutting office printing waste paper into fragments, adding the fragments and water into a pulper after finishing, adding 2.5% office printing waste paper neutral deinking agent, controlling the concentration of the pulper to 15%, controlling the temperature to 55 ℃, pre-soaking for 40min, pulping for 30min and preserving the heat for 60min. All the above are weight percentages;
2. diluting the crushed paper pulp with water to the concentration of 1.2%, and floating for 10min by using a flotation machine;
3. after flotation, the pulp is poured into a pulp bag and washed by a copper mesh of 100 meshes. And (5) finishing the deinking process.
Example 5
The embodiment provides an office printing waste paper neutral deinking agent and a preparation method thereof, and the preparation method is as follows:
the office printing waste paper neutral deinking agent comprises the following components in parts by weight: 20 parts of polyoxyethylene myristate, 12 parts of p-tert-octylphenyl polyoxyethylene ether, 10 parts of myristyl alcohol polyoxyethylene ether, 20 parts of sodium dodecyl sulfonate, 8 parts of phenol polyoxyethylene polyoxypropylene ether, 10 parts of ethanol and 20 parts of water.
The preparation method of the office printing waste paper neutral deinking agent comprises the following steps:
1. weighing the components according to parts by weight;
2. pouring the weighed phenol polyoxyethylene polyoxypropylene ether, ethanol and water into a reaction kettle, heating to 40 ℃, adding sodium dodecyl sulfate, and stirring at a speed of 380r/min until the sodium dodecyl sulfate is completely dissolved; and (3) reducing the stirring speed to 200r/min, sequentially adding polyoxyethylene myristate, p-tert-octylphenyl polyoxyethylene ether and myristyl alcohol polyoxyethylene ether, fully dissolving, continuously stirring for 65min at the stirring speed of 220r/min, standing, and naturally cooling to obtain the office printing waste paper neutral deinking agent sample E.
The deinking method of the neutral deinking agent sample E for office printing waste paper comprises the following steps:
1. cutting office printing waste paper into fragments, adding the fragments and water into a pulper after finishing, adding 2.2% office printing waste paper neutral deinking agent, controlling the pulping pulp to be thick to 5%, controlling the temperature to be 30 ℃, and pre-soaking for 10min, pulping for 10min and preserving the heat for 30min. All the above are weight percentages;
2. diluting the crushed paper pulp with water to the concentration of 1.2%, and floating for 15min by using a flotation machine;
3. after flotation, the pulp is poured into a pulp bag and washed by a copper mesh of 80 meshes. And (5) finishing the deinking process.
Example 6
The embodiment provides an office printing waste paper neutral deinking agent and a preparation method thereof, and the preparation method is as follows:
the office printing waste paper neutral deinking agent comprises the following components in parts by weight: 25 parts of polyoxyethylene myristate, 15 parts of p-tert-octylphenyl polyoxyethylene ether, 15 parts of myristyl alcohol polyoxyethylene ether, 20 parts of sodium dodecyl sulfonate, 5 parts of phenol polyoxyethylene polyoxypropylene ether, 5 parts of ethanol and 15 parts of water.
The preparation method of the office printing waste paper neutral deinking agent comprises the following steps:
1. weighing the components according to parts by weight;
2. pouring the weighed phenol polyoxyethylene polyoxypropylene ether, ethanol and water into a reaction kettle, heating to 50 ℃, adding sodium dodecyl sulfate, and stirring at a speed of 400r/min until the sodium dodecyl sulfate is completely dissolved; and (3) reducing the stirring speed to 200r/min, sequentially adding polyoxyethylene myristate, p-tert-octylphenyl polyoxyethylene ether and myristyl alcohol polyoxyethylene ether, fully dissolving, continuously stirring for 50min at the stirring speed of 220r/min, standing, and naturally cooling to obtain the office printing waste paper neutral deinking agent sample F.
The deinking method using the office printing waste paper neutral deinking agent sample F comprises the following steps:
1. cutting office printing waste paper into fragments, adding the fragments and water into a pulper after finishing, adding 0.8% office printing waste paper neutral deinking agent, controlling the concentration of the pulper to be 10%, controlling the temperature to be 70 ℃, presoaking for 40min, pulping for 10min, and preserving the heat for 60min. All the above are weight percentages;
2. diluting the crushed paper pulp with water until the concentration of the paper pulp is 0.5%, and floating for 10min by using a flotation machine;
3. after flotation, the pulp is poured into a pulp bag and washed by a copper mesh of 80 meshes. And (5) finishing the deinking process.
Example 7
The embodiment provides an office printing waste paper neutral deinking agent and a preparation method thereof, and the preparation method is as follows:
the office printing waste paper neutral deinking agent comprises the following components in parts by weight: 23 parts of polyoxyethylene myristate, 13 parts of p-tert-octylphenyl polyoxyethylene ether, 10 parts of myristyl alcohol polyoxyethylene ether, 18 parts of sodium dodecyl sulfonate, 7 parts of phenol polyoxyethylene polyoxypropylene ether, 7 parts of ethanol and 22 parts of water;
the preparation method of the office printing waste paper neutral deinking agent comprises the following steps:
1. weighing the components according to parts by weight;
2. pouring the weighed phenol polyoxyethylene polyoxypropylene ether, ethanol and water into a reaction kettle, heating to 45 ℃, adding sodium dodecyl sulfate, and stirring at a speed of 390r/min until the sodium dodecyl sulfate is completely dissolved; and (3) reducing the stirring speed to 200r/min, sequentially adding polyoxyethylene myristate, p-tert-octylphenyl polyoxyethylene ether and myristyl alcohol polyoxyethylene ether, fully dissolving, continuously stirring for 55min at the stirring speed of 210r/min, standing, and naturally cooling to obtain the office printing waste paper neutral deinking agent sample G.
The deinking method using the office printing waste paper neutral deinking agent sample G comprises the following steps:
1. cutting office printing waste paper into fragments, adding the fragments and water into a pulper after finishing, adding 0.2% office printing waste paper neutral deinking agent, controlling the pulp concentration to be 5%, controlling the temperature to be 70 ℃, pre-soaking for 35min, pulp crushing for 15min and heat preservation for 60min. All the above are weight percentages;
2. diluting the crushed paper pulp with water to the concentration of 1.2%, and floating for 15min by using a flotation machine;
3. after flotation, the pulp is poured into a pulp bag and washed by a copper mesh of 100 meshes. And (5) finishing the deinking process.
Example 8
The embodiment provides an office printing waste paper neutral deinking agent and a preparation method thereof, and the preparation method is as follows:
the office printing waste paper neutral deinking agent comprises the following components in parts by weight: 20 parts of polyoxyethylene myristate, 15 parts of p-tert-octylphenyl polyoxyethylene ether, 13 parts of myristyl alcohol polyoxyethylene ether, 17 parts of sodium dodecyl sulfonate, 5 parts of phenol polyoxyethylene polyoxypropylene ether, 10 parts of ethanol and 20 parts of water;
the preparation method of the office printing waste paper neutral deinking agent comprises the following steps:
1. weighing the components according to parts by weight;
2. pouring the weighed phenol polyoxyethylene polyoxypropylene ether, ethanol and water into a reaction kettle, heating to 45 ℃, adding sodium dodecyl sulfate, and stirring at a stirring speed of 410r/min until the sodium dodecyl sulfate is completely dissolved; and (3) reducing the stirring speed to 200r/min, sequentially adding polyoxyethylene myristate, p-tert-octylphenyl polyoxyethylene ether and myristyl alcohol polyoxyethylene ether, fully dissolving, continuously stirring for 55min at the stirring speed of 180r/min, standing, and naturally cooling to obtain the office printing waste paper neutral deinking agent sample H.
The deinking method of the neutral deinking agent sample H for office printing waste paper comprises the following steps:
1. cutting office printing waste paper into fragments, adding the fragments and water into a pulper after finishing, adding 1.8% office printing waste paper neutral deinking agent, controlling the pulp concentration of the crushed pulp to 12%, controlling the temperature to 45 ℃, pre-soaking for 25min, pulping for 25min, and preserving the heat for 60min. All the above are weight percentages;
2. diluting the crushed paper pulp with water to the concentration of 1.0%, and floating for 5min by using a flotation machine;
3. after flotation, the pulp is poured into a pulp bag and washed by a copper mesh of 90 meshes. And (5) finishing the deinking process.
Example 9
The embodiment provides an office printing waste paper neutral deinking agent and a preparation method thereof, and the preparation method is as follows:
the office printing waste paper neutral deinking agent comprises the following components in parts by weight: 20 parts of polyoxyethylene myristate, 11 parts of p-tert-octylphenyl polyoxyethylene ether, 12 parts of myristyl alcohol polyoxyethylene ether, 17 parts of sodium dodecyl sulfonate, 5 parts of phenol polyoxyethylene polyoxypropylene ether, 5 parts of ethanol and 30 parts of water;
the preparation method of the office printing waste paper neutral deinking agent comprises the following steps:
1. weighing the components according to parts by weight;
2. pouring the weighed phenol polyoxyethylene polyoxypropylene ether, ethanol and water into a reaction kettle, heating to 48 ℃, adding sodium dodecyl sulfate, and stirring at a stirring speed of 410r/min until the sodium dodecyl sulfate is completely dissolved; and (3) reducing the stirring speed to 220r/min, sequentially adding polyoxyethylene myristate, p-tert-octylphenyl polyoxyethylene ether and myristyl alcohol polyoxyethylene ether, fully dissolving, continuously stirring at the stirring speed of 190r/min for 65min, standing, and naturally cooling to obtain the office printing waste paper neutral deinking agent sample I.
The deinking method of the neutral deinking agent sample I for office printing waste paper comprises the following steps:
1. cutting office printing waste paper into fragments, adding the fragments and water into a pulper after finishing, adding 0.3% office printing waste paper neutral deinking agent, controlling the pulping pulp concentration to be 12%, controlling the temperature to be 50 ℃, pre-soaking for 40min, pulping for 15min, and preserving the heat for 35min. All the above are weight percentages;
2. diluting the crushed paper pulp with water until the concentration of the paper pulp is 0.7%, and floating for 18min by using a flotation machine;
3. after flotation, the pulp is poured into a pulp bag and washed by a copper mesh of 100 meshes. And (5) finishing the deinking process.
Example 10
The embodiment provides an office printing waste paper neutral deinking agent and a preparation method thereof, and the preparation method is as follows:
the office printing waste paper neutral deinking agent comprises the following components in parts by weight: 25 parts of polyoxyethylene myristate, 12 parts of p-tert-octylphenyl polyoxyethylene ether, 15 parts of myristyl alcohol polyoxyethylene ether, 17 parts of sodium dodecyl sulfonate, 8 parts of phenol polyoxyethylene polyoxypropylene ether, 6 parts of ethanol and 17 parts of water;
the preparation method of the office printing waste paper neutral deinking agent comprises the following steps:
1. weighing the components according to parts by weight;
2. pouring the weighed phenol polyoxyethylene polyoxypropylene ether, ethanol and water into a reaction kettle, heating to 45 ℃, adding sodium dodecyl sulfate, and stirring at a speed of 400r/min until the sodium dodecyl sulfate is completely dissolved; and (3) reducing the stirring speed to 200r/min, sequentially adding polyoxyethylene myristate, p-tert-octylphenyl polyoxyethylene ether and myristyl alcohol polyoxyethylene ether, fully dissolving, continuously stirring at the stirring speed of 200r/min for 70min, standing, and naturally cooling to obtain the office printing waste paper neutral deinking agent sample J.
The deinking method of the office printing waste paper neutral deinking agent sample J comprises the following steps:
1. cutting office printing waste paper into fragments, adding the fragments and water into a pulper after finishing, adding 2.5% office printing waste paper neutral deinking agent, controlling the pulp concentration of the crushed pulp to 12%, controlling the temperature to 45 ℃, pre-soaking for 25min, pulping for 15min and preserving the heat for 60min. All the above are weight percentages;
2. diluting the crushed paper pulp with water to the concentration of 1.0%, and floating for 10min by using a flotation machine;
3. after flotation, the pulp is poured into a pulp bag and washed by a copper mesh of 80 meshes. And (5) finishing the deinking process.
The deinking effect of the neutral deinking agent for office printing waste paper in the above example is compared with that of the conventional alkaline deinking method in the prior art, and the deinking effect is shown in table 1:
table 1 comparison of deinking Effect of deinking agent of the present invention and existing alkaline deinking agent
Note that: the existing alkaline deinking agent is purchased from a company known in Zhejiang.
As can be seen from Table 1, compared with the existing alkaline deinking agent, the neutral deinking agent for office printing waste paper has the advantages that the deinking particle removal rate, whiteness increase rate and waste paper pulp yield are far higher than those of the conventional alkaline deinking agent in the deinking treatment of office printing waste paper, and the COD value of waste water is reduced by about 50% compared with that of the conventional alkaline deinking agent. Meanwhile, the product of the invention has no corrosiveness.
Comparative examples 1 to 5
To illustrate the irreplaceability of the polyoxyethylene myristate in the present formulation, comparative examples 1-5 were provided with deinking effect data, for ease of comparison, and comparative examples 1-5 were distinguished from example 4 in that except for the replacement of polyoxyethylene myristate with other conventional formulations, the other experimental conditions and formulation components were the same, see in particular table 2:
table 2 comparison of deinking effects of example 4 and comparative examples 1 to 5
As shown in Table 2, the key formula using the myristic acid polyoxyethylene ether as the neutral deinking agent has larger advantages than other conventional formulas in whiteness and waste paper pulp yield, and the COD value of the waste water is lower than other formulas, thereby meeting the requirements of safety and environmental protection. The myristic acid polyoxyethylene ether is not replaceable in the formula.
Comparative examples 6 to 8
To illustrate the irreplaceability of sodium dodecyl sulfate in the present formulation, comparative examples 6-8 were provided with deinking effect data for comparison purposes, and comparative examples 6-8 were compared to example 4 with the neutral deinking agent prepared in example 4, except that sodium dodecyl sulfate was replaced with a similar anionic surfactant formulation, and other experimental conditions and formulation components were the same, as shown in Table 3:
table 3 comparison of deinking effect for example 4 and comparative examples 6 to 8
As can be seen from table 3, the use of sodium dodecyl sulfate as the neutral deinking agent anion formulation has a very significant advantage over other anion formulations in ink particle removal rate, indicating that sodium dodecyl sulfate is not an alternative in the present formulation.
The foregoing examples illustrate only a few embodiments of the invention and are described in detail herein without thereby limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.
Claims (8)
1. A neutral deinking agent for office printing waste paper is characterized in that: the components in parts by weight are as follows: 20-25 parts of polyoxyethylene myristate, 10-15 parts of p-tert-octylphenyl polyoxyethylene ether, 10-15 parts of myristyl alcohol polyoxyethylene ether, 15-20 parts of sodium dodecyl sulfonate, 5-10 parts of phenol polyoxyethylene polyoxypropylene ether, 5-10 parts of ethanol and 10-30 parts of water;
the preparation method comprises the following steps:
step 1: mixing and heating phenol polyoxyethylene polyoxypropylene ether, ethanol and water to 40-50 ℃ according to the weight parts of the deinking agent, adding sodium dodecyl sulfate, and stirring at a stirring speed of 400r/min +/-20 until the mixture is completely dissolved;
step 2: reducing the stirring speed to 200 r/min+/-20, sequentially adding the polyoxyethylene myristate, the p-tert-octylphenyl polyoxyethylene ether and the myristyl alcohol polyoxyethylene ether, fully dissolving, continuously stirring for 50-70 min at the stirring speed of 200 r/min+/-20, standing, and naturally cooling to obtain the modified polyvinyl alcohol.
2. A neutral deinking agent for office printed waste paper as claimed in claim 1, wherein: the neutral deinking agent comprises the following components in parts by weight: 20-22 parts of polyoxyethylene myristate, 12-15 parts of p-tert-octylphenyl polyoxyethylene ether, 13-15 parts of myristyl alcohol polyoxyethylene ether, 17 parts of sodium dodecyl sulfonate, 5-10 parts of phenol polyoxyethylene polyoxypropylene ether, 10 parts of ethanol and 14-20 parts of water.
3. A neutral deinking agent for office printing waste paper according to claim 1 or 2, characterized in that: the neutral deinking agent comprises the following components in parts by weight: 22 parts of polyoxyethylene myristate, 12 parts of p-tert-octylphenyl polyoxyethylene ether, 15 parts of myristyl alcohol polyoxyethylene ether, 17 parts of sodium dodecyl sulfonate, 10 parts of phenol polyoxyethylene polyoxypropylene ether, 10 parts of ethanol and 14 parts of water.
4. A deinking method for office printing waste paper is characterized by comprising the following steps: a neutral deinking agent according to any one of claims 1 to 3, comprising the steps of:
(1) The office printing waste paper is processed into fragments, then added into a pulper together with water, and added into the neutral deinking agent for disintegrating treatment; the control parameters of the crushing treatment are as follows: the addition amount of the neutral deinking agent is 0.1-3.0% of the mass percentage concentration of the neutral deinking agent in the system, the concentration of the crushed pulp is 5-15%, the temperature is 30-70 ℃, the pre-soaking time is 10-60 min, the crushing time is 10-30 min, and the heat preservation time is 10-60 min;
(2) Diluting the crushed paper pulp with water until the concentration of the paper pulp is 0.5-1.5%, and floating by a flotation machine for 5-20 min;
(3) And pouring the paper pulp into a pulp bag after flotation is finished, and washing through a copper mesh of 80-100 meshes to finish the deinking process.
5. The method for deinking office printed waste paper of claim 4, wherein: the control parameters of the crushing treatment are as follows: the addition amount of the neutral deinking agent is 2.5 percent of the mass concentration of the neutral deinking agent in the system, 15 percent of the crushed pulp, the temperature is 55 ℃, the pre-soaking time is 40min, the crushed pulp time is 30min, and the heat preservation time is 10min.
6. The method for deinking office printed waste paper of claim 4, wherein: and (3) adding water into the crushed paper pulp to dilute the paper pulp to 1.2 percent.
7. The method for deinking office printed waste paper of claim 4, wherein: the time for flotation using the flotation machine was 10min.
8. A method for deinking office printed waste paper according to any one of claims 4 to 7, characterized in that: the removal rate of ink particles of the office printing waste paper is not lower than 90%, and the whiteness increase rate is not lower than 10%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111454849.2A CN114163866B (en) | 2021-12-01 | 2021-12-01 | Neutral deinking agent for office printing waste paper, preparation method and application |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111454849.2A CN114163866B (en) | 2021-12-01 | 2021-12-01 | Neutral deinking agent for office printing waste paper, preparation method and application |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114163866A CN114163866A (en) | 2022-03-11 |
| CN114163866B true CN114163866B (en) | 2023-05-30 |
Family
ID=80482210
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111454849.2A Active CN114163866B (en) | 2021-12-01 | 2021-12-01 | Neutral deinking agent for office printing waste paper, preparation method and application |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114163866B (en) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1244735C (en) * | 2004-04-08 | 2006-03-08 | 山东轻工业学院 | Deinking technique for news bogus paper through enzyme |
| CN101434764B (en) * | 2007-11-15 | 2010-12-01 | 中国石油化工股份有限公司 | an ink cleaning agent |
| CN104744995A (en) * | 2015-04-14 | 2015-07-01 | 上海天坛助剂有限公司 | Multifunctional wastepaper deinking agent |
| CN105907163B (en) * | 2016-06-20 | 2018-10-30 | 广州聚注通用技术研究院有限公司 | A kind of composition of deinking agent |
| CN110183897A (en) * | 2019-06-26 | 2019-08-30 | 珠海横琴思国科技发展有限公司 | A kind of environmental protection, efficient polyurethane ink deinking agent and preparation method thereof |
-
2021
- 2021-12-01 CN CN202111454849.2A patent/CN114163866B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN114163866A (en) | 2022-03-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101725069B (en) | Method for improving removal effect of ink in waste paper pulp | |
| CN101928485B (en) | Waste paper deinking agent | |
| CN112709089A (en) | Production method for reconstructing corrugated medium paper by using waste paper by improving pulping and pulping process | |
| CN114163866B (en) | Neutral deinking agent for office printing waste paper, preparation method and application | |
| CN103437230B (en) | Based on alkali double loop flotation deinking technique in biology enzyme | |
| CN102803603B (en) | Deinking process | |
| CN101982607A (en) | Cooking agent for papermaking and pulping and preparation method thereof | |
| CN104631179A (en) | Method for removing ink of waste paper | |
| JPS6411756B2 (en) | ||
| JP3276024B2 (en) | Manufacturing method of deinked pulp | |
| CN102277763B (en) | Neutral deinking agent for waste newspaper and waste book and periodical paper, preparation method of neutral deinking agent and deinking method | |
| CN108978306A (en) | A kind of method of deinking processing | |
| JP6492798B2 (en) | Method for producing deinked waste paper pulp | |
| JP3007465B2 (en) | Deinking agent | |
| EP0407501A4 (en) | Method and composition for deinking recycled paper pulp | |
| CN103031017B (en) | Neutral deinking agent for waste newspaper and waste book and periodical paper, preparation method and deinking method | |
| CN105255250B (en) | A kind of environmentally friendly deinking agent and preparation method thereof | |
| JPS6261712B2 (en) | ||
| CN113502674B (en) | A kind of straw fiber dissociating agent and dry process straw fiber production method | |
| CN110725148A (en) | Technology for stabilizing pH value in hydrogen peroxide oxidation bleaching process | |
| JPS6261713B2 (en) | ||
| CN109280417A (en) | Neutral deinking agent and preparation method thereof | |
| CN104088184A (en) | Pulp washing auxiliary agent and pulping process | |
| CN119221315A (en) | Neutral deinking method for waste newspapers and waste book papers | |
| JPS62177291A (en) | Deinking agent |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |