CN1289380A - Papermaking process using hydrophilic dispersion polmers of diallyldi methyl ammonium chloride and acrylamide as retention and drainage aids - Google Patents
Papermaking process using hydrophilic dispersion polmers of diallyldi methyl ammonium chloride and acrylamide as retention and drainage aids Download PDFInfo
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- CN1289380A CN1289380A CN99802471A CN99802471A CN1289380A CN 1289380 A CN1289380 A CN 1289380A CN 99802471 A CN99802471 A CN 99802471A CN 99802471 A CN99802471 A CN 99802471A CN 1289380 A CN1289380 A CN 1289380A
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
- D21H21/06—Paper forming aids
- D21H21/10—Retention agents or drainage improvers
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/20—Macromolecular organic compounds
- D21H17/33—Synthetic macromolecular compounds
- D21H17/34—Synthetic macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D21H17/41—Synthetic macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds containing ionic groups
- D21H17/44—Synthetic macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds containing ionic groups cationic
- D21H17/45—Nitrogen-containing groups
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/20—Macromolecular organic compounds
- D21H17/21—Macromolecular organic compounds of natural origin; Derivatives thereof
- D21H17/24—Polysaccharides
- D21H17/28—Starch
- D21H17/29—Starch cationic
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/20—Macromolecular organic compounds
- D21H17/33—Synthetic macromolecular compounds
- D21H17/34—Synthetic macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D21H17/37—Polymers of unsaturated acids or derivatives thereof, e.g. polyacrylates
- D21H17/375—Poly(meth)acrylamide
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/63—Inorganic compounds
- D21H17/66—Salts, e.g. alums
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Paper (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
Abstract
A method for improving retention and drainage performance in a papermaking process is disclosed. The method comprises forming an aqueous cellulosic papermaking slurry, adding an effective amount of a hydrophilic dispersion polymer to the slurry, draining the slurry to form a sheet and drying the sheet. The hydrophilic dispersion polymer is preferably a copolymer of diallyldimethyl ammonium chloride and acrylamide.
Description
Invention field
Present invention relates in general to field of papermaking, more particularly, relate to diallyl-N, ammonium halide that the N-double-basis replaces and the hydrophily dispersed copolymer of (methyl) acrylamide are as the improvement papermaking process of retention agent and filter aid.
Background of invention
In making the paper process, moisture cellulose suspension or slurry are made paper.Cellulose paste is diluted into denseness (solid dry weight percentage in the slurry) usually and less than 1%, often be lower than 0.5%, and final paper must contains the water that is less than 6% (percentage by weight) before entering paper machine.Therefore, the syneresis of papermaking is particularly important to production efficiency and production cost.
The most cheap dewatering is a drainage, thereafter, has used expensive method, comprises that vacuum pressing, felt rug blot and suppress, evaporation etc., and any combination of these methods.Because drainage is the dewatering that uses at first, also be the most cheap, the improvement of dewatering efficiency will reduce the water yield with the required removal of additive method, and improve the overall efficiency of dehydration, thereby reduce its cost.
Another is to be retained on the fiberboard that forms in the paper-making process and the furnish component in it to paper efficient and the very important aspect of cost.Papermaking batching contains magnitude range from about 2～3 millimeters cellulose fibre to the filler particles of several microns sizes only.In this scope is cellulose chip, mineral filler (being used to increase turbidity, brightness and other paper performance) and other granule, usually do not comprise one or more retention agents, described retention agent can pass the space (hole) between the cellulose fibre in the fiberboard that is forming.
A kind of cellulose chip, mineral filler and other furnish component of improving adds coagulating agent/flocculant system before the method for the retention on the fiberboard is to enter paper machine.In this system,, add in the batching as low molecular weight cationic synthetic polymer or cationic starch at first with coagulating agent.Coagulating agent reduces in the batching on the particle usually, and particularly therefore the surface negative charge of cellulose chip and mineral filler makes these particle aggregations.Add flocculant behind the coagulating agent.Flocculant is high molecular weight cation or anion synthetic polymer normally, from a surface to another surperficial bridging particle and/or agglomerate, thereby particle is combined into big agglomerate.The appearance of these big agglomerates has increased retention in the batching.Agglomerate is leached into from water on the fiber web, and uncongealed particle then generally can pass through fiber web.
If batching forms jelly or contains gel-like substance, the agglomerate of flocculation does not reach the annoyance level to the fiberboard drainage usually, and when this floccule was filtered by fiber web, had reduced in online hole, so reduced drainage efficient.Therefore, the increase of retention is a cost to reduce drainage.
As United States Patent (USP) 4,753,710 and 4,913,775 described systems have been used to provide the reservation of improvement and the combination of dehydration.Briefly, these patents require to add high molecular weight linear cationic polymer earlier in suspension before shearing aqueous cellulosic papermaking suspension, add bentonite then after shearing.Shearing is provided by one or more cleanings, mixing and the pumping stage of paper-making process usually.Shearing is broken into microfloc with the big flocculate that heavy polymer forms, and adds the bentonite clay particle then and further assembles.
Another is at U.S. Patent number 4,388, disclosed system in 150, in conjunction with using cationic starch and colloidal silica thereafter, by in and electric charge and the little grumeleuse of absorption increase the quantity of online reservation material.
U.S. Patent number 5,098,520 and 5,185,062 has told about a kind of dehydration method in the paper-making process of improving.
Although these previous systems are arranged, still need new method to use the hydrophily dispersed polymeres and keep and water filtering performance to improve, particularly need not to add unnecessary oil and surfactant, both are included in the back in conventional latex (latex) polymer.Here used " latex " is defined as contrary (inverse) water-in-oil emulsion polymer.Still need do not need the converter system introduce the dispersed polymeres of paper-making process with available simple apparatus for feeding.
Summary of the invention
Method of the present invention need form the aqueous cellulosic paper making pulp, adds the hydrophily dispersed polymeres of effective dose in this slurry, and the filter dry pulp is to form paper and dry paper.The hydrophily dispersed polymeres comprises:
ⅰ. cationic monomer diallyl-N, the disubstituted ammonium halide of N-, the substituting group in the wherein said disubstituted ammonium halide is selected from C
1-C
20Alkyl, aryl, alkylaryl and aralkyl and
ⅱ. second monomer of following molecular formula:
R wherein
1And R
2Be selected from hydrogen, C
1-C
10Alkyl, aryl and alkylaryl; R
3Be selected from hydrogen and methyl; R
4And R
5Be selected from C
1-C
10Straight or branched alkylidene and hydrogen; In the aqueous solution of multivalent anions salt, described polymerisation is to carry out under the condition that has dispersant to exist.
This method has been improved reservation and water filtering performance and need do not added unnecessary oil and surfactant.In addition, the used hydrophily dispersed polymeres of the present invention does not need changer system, and available simple apparatus for feeding imports paper-making process.Detailed description of the invention
The present invention relates to a kind of improve in the paper-making process and keep and the method for water filtering performance, comprise forming the aqueous cellulosic paper making pulp, the hydrophily dispersed polymeres being added in the slurry, drains slurry with formation paper and subsequent drying paper.
Hydrophily dispersed polymeres of the present invention is diallyl-N, the copolymer of the disubstituted ammonium halide cationic monomer of N-and (methyl) acrylamide.Preferred copolymer is formed by diallyldimethylammonium chloride (DADMAC) and acrylamide (AcAm).Found that above-mentioned polymer has application advantage in paper-making process.Especially, with conventional cationic latex polymer phase ratio, hydrophily dispersed polymeres of the present invention keep with water filtering performance aspect demonstrate activity improvement or identical, and need not add unnecessary oil and surfactant.In addition, these polymer do not need changer system, and available simple apparatus for feeding imports in the paper-making process.Another advantage is relevant with the mode that adds dispersed polymeres.In most cases, conventional at present water-soluble polymer can have been bought on market by powder type.Before use, polymer powder must be dissolved in the water-bearing media with practical application.Polymer expands in water-bearing media, the dispersed particles flocculation.In general, Chang Gui polymer is difficult in the water-bearing media and dissolves.On the contrary, dispersed polymeres of the present invention owing to itself characteristic, has been avoided the problem relevant with dissolving.
In addition, the copolymer that is formed by DADMAC and AcAm has superior flexibility, makes it can be used for independent polymer treatment, or as a component that needs the conventional bifunctional polymerizable object space case (program) of conventional coagulant and flocculant.
Dispersed copolymer of the present invention, be diluted with water to aqueous solution form if desired, can be advantageously used in the multiple technologies field, as the additive of flocculant, thickener, soil conditioner, adhesive, food additives, dispersant, detergent, medicine and cosmetics and other.
Monomer
Example 1 has been summarized the method that monomer component in varing proportions prepares copolymer, acid/acrylic amide type monomer and diallyl-N, and the proportion of the disubstituted ammonium halide of N-is from about 1: 99 to about 99: 1.To illustrate in greater detail below in order to two types the monomer that forms dispersed polymeres of the present invention.
About diallyl-N, the disubstituted ammonium halide of N-, the disubstituted of monomer whose can be C
1-C
20Alkyl, aryl, alkylaryl or aryl alkyl.In addition, each disubstituted can be different groups.For example, the halide of an expection is N-methyl-N-ethyl-N, the N-diallyl ammonium chloride.
It is a kind of that to use a halid special case be DADMAC.Preferably, in the copolymer amount of DADMAC from about 5 mole percents to about 30 mole percents.Diallyl-N, the ammonium halide, particularly DADMAC that the N-double-basis replaces also can be buied from various sources on market as everyone knows.Remove the chlorination beyond the region of objective existence, equilibrium ion is bromide, sulfate, phosphate, a hydrogen orthophosphate and nitrate and other also.A kind of method of preparation DADMAC is at U.S. Patent number 4,151, the existing detailed description in detail in 202.
About the acid/acrylic amide type monomer, (methyl) acrylamide monomer of replacement can be the alkyl of straight or branched.Applicable monomer includes but not limited to: ethylhexyl (methyl) acrylamide, lignocaine propyl group (methyl) acrylamide, dimethylamino hydroxypropyl (methyl) acrylamide, N-isopropyl (methyl) acrylamide, the N-tert-butyl group (methyl) acrylamide, C
1-C
10N-alkyl acrylamide, C
1-C
10N-alkyl methyl acrylamide, N-aryl acrylamide, N-aryl methyl acrylamide, N-aryl alkyl acrylamide, N-isopropyl (methyl) acrylamide, N,N-DMAA (methyl) acrylamide, C
1-C
10N, N-dialkyl group acrylamide, C
1-C
10N, N-dialkyl methyl acrylamide, N, N-diaryl acrylamide, N, N-diaryl Methacrylamide, N, N-diallyl alkyl acrylamide and N, N-two aralkyl Methacrylamides.The meaning of terminology used here " aralkyl " is to have benzyl and phenethyl." side (pendant) amine " refers to be connected in the NH of main polymer chain
2Group.
Multivalent anions salt
Multivalent anions salt is incorporated in the aqueous solution.According to the present invention, multivalent anions salt is suitably sulfate, phosphate or both mixtures.Preferred salt comprises ammonium sulfate, sodium sulphate, magnesium sulfate, aluminum sulfate, ammonium hydrogen phosphate, dibastic sodium phosphate and potassium hydrogen phosphate.In the present invention, each uses these salt with its aqueous solution form, concentration be 15% or more than.
Dispersant
Polymer dispersant is present in the anion salt aqueous solution of above-mentioned monomer polymerization reaction take place.Polymer dispersant is a kind of water soluble polymer cationic polymer, is preferably dissolved in the saline solution above-mentioned.According to the gross weight of hydrophily dispersed polymeres, the weight of the preferred polymer dispersant that uses is about 1-10%.Polymer dispersant is made up of 20% (molar percentage) or above cationic monomer unit, ammonium halide or N that this cationic monomer unit replaces for the diallyl double-basis, N-dialkyl group-aminoethyl (methyl) acrylates and its quaternary salt.Preferably, remaining mole % is AcAm or (methyl) AcAm.The performance of dispersant is subjected to the influence of molecular weight little.But the molecular weight of dispersant is preferably about 10,000 to 10,000, between 000.Preferred dispersing agent comprises the homopolymers of diallyldimethylammonium chloride, dimethylaminoethyl acrylamide methyl chlorination quaternary salt and dimethylaminoethyl methacrylate methyl chloride quaternary salt.
According to one embodiment of the invention, multifunctional ethanol such as glycerine or polyethylene glycol exist in paradigmatic system jointly.Under the situation that has these ethanol, the deposition of fine particle is carried out reposefully.In addition, polysaccharide such as starch, glucan, carbomethoxy cellulose and amylopectin and other, also can be individually or in conjunction with other organic cation flocculant as stabilizing agent.
Dispersed polymeres
For polymerization, can use common water soluble group to form reagent, but preferably use water-soluble azo compounds as, 2, two (2-amidine propane) hydrochlorides and 2 of 2 '-azo, two (N, the N '-dimethylene isobutylamine) hydrochlorides of 2 '-azo.
According to one embodiment of the invention,, before beginning polymerization, above-mentioned monomer added crystal seed (seed) polymer for the dispersion that obtains.This seed polymer is a water-soluble cationic polymer, is insoluble to the aqueous solution of multivalent anions salt.The method that described seed polymer is preferably described with the present invention is by the polymer for preparing in the above-mentioned monomer mixture.Yet, the monomer of seed polymer form needn't be always with polymerization process in the monomer of the water-soluble cationic polymer that forms form identical.But the same with the water-soluble polymer that forms in the polymerization process, seed polymer should contain the diallyl dimethyl ammonium halide cationic monomer unit of 5 mole percents at least.According to an example of the present invention, the seed polymer that is used for a polymerisation is the water-soluble polymer for preparing in previous reaction, and identical monomer mixture is used in this reaction.
Method
At first, prepare aqueous cellulosic paper pulp with method arbitrary routine, that those skilled in the art generally know.Then the hydrophily dispersed polymeres is joined in the slurry.
The hydrophily dispersed polymeres is formed by the following monomer of polymerization:
ⅰ. diallyl-N, the ammonium halide cationic monomer that the N-double-basis replaces, wherein said double-basis
The substituting group that replaces ammonium halide is selected from C
1-C
20Alkyl, aryl, alkylaryl and aralkyl
Base and
ⅱ. second monomer of following molecular formula:
R wherein
1And R
2Be selected from hydrogen, C
1-C
10Alkyl, aryl and alkylaryl; R
3Be selected from hydrogen and methyl; R
4And R
5Be selected from by C
1-C
10One group of forming of straight or branched alkylidene and hydrogen; Described polymerisation is under the condition that has dispersant to exist, and carries out in the aqueous solution of multivalent anions salt.
Then with cellulose paper making pulp drainage to form paper and subsequent drying.Drainage and dry step can be carried out with method any routine, that those skilled in the art generally know.Cationic monomer can be DADMAC, and second monomer can be AcAm.The hydrophily dispersed polymeres can have the cationic charge of an about 1mol% to about 50mol%.
In addition, although the effective active that must emphasize the reservation of this dispersion polymer and drainage without any need for additive, conventional coagulating agent, conventional flocculant, alum, cationic starch or their combination also can be used as the additive of this dispersion polymer.
Further, the inherent viscosity of hydrophily dispersed polymeres of the present invention is about 0.5 to about 10dl/g, is preferably about 1.5 to 8.5dl/g, most preferably from about 2.5 arrives about 7.5dl/g.According to the condition of specific plant, preferred dosage is that slurry solids per ton about 0.05 is to about 5.0 pounds active component.
Example
Below example be used for that the present invention will be described, how to prepare and use the present invention to teach those of ordinary skill.These examples also do not limit the present invention in any way or its protection domain.Example 1
With the diallyldimethylammonium chloride of synthetic 30% mole of following manner and the dispersed copolymer of acrylamide.Poly-(DMAEA.MCQ) (dimethylaminoethyl acrylates methyl chloride quaternary salt with 25.667 gram 49.0% acrylamide solutions (0.1769 mole), 161.29 gram 62.0%DADMAC solution (0.6192 mole), 200 gram ammonium sulfate, 40 gram sodium sulphate, 303.85 gram deionized waters, 0.38 gram sodium formate, 45 grams 20%, IV=2.0dl/g) solution and 0.2 restrains in the resin reaction device of one two liters of EDTA addings, and this reactor is equipped with agitator, temperature controller and a water cooled condenser.Mixture heated to 48 ℃, add 2 of 2.50 grams 4%, 2 of two (2-amidine propane) dihydrochloride solution of 2 '-azo and 2.50 grams 4%, two (N, N '-dimethylene NSC 18620) the dihydrochloride solution of 2 '-azo.The solution that obtains carries out bubbling with the nitrogen of 1000cc/min.After 15 minutes, polymerisation begins, and solution becomes sticky.In subsequently 4 hours, temperature maintenance is at 50 ℃, and the 49.0%AcAm (1.230 moles) and the 0.2 EDTA solution that restrains that will contain 178.42 grams are pumped in the reactor with a syringe pump.Cloth network gram Field (Brookfield) viscosity of the polymeric dispersions that obtains is 4200cps.Dispersion was further reacted 2.5 hours under 55 ℃ of temperature then.The cloth network gram Field viscosity that obtains polymeric dispersions is 3300cps.Adipic acid, 10 gram ammonium sulfate and 12.5 grams, the 60% thiosulfuric acid aqueous ammonium of 10 grams 99% are added in the polymeric dispersions.The cloth network gram Field viscosity of the dispersion that obtains is 1312.5cps, and contains the DADMAC and the AcAm copolymer 20% of 50% (percentage by weight), and it is at 1.0 moles of NaNO
3In inherent viscosity be 6.32dl/g.
Polymer that uses among the present invention and description separately thereof are summarized in the table 1.
Table 1 dispersion I
130/70 mole of %DADMAC/AcAm RSV
44.7dl/g other polymer
2Polymer I
230/70 mole of %DADMAC/AcAm latex RSV5.0dl/g polymer J
210/90 mole of %DMAEA.MCQ/AcAm latex RSV15.2dl/g polymer K
21/99 mole of %DMAEA.MCQ/AcAm latex RSV27.8dl/g polymer L
25/95 mole of %DMAEA.MCQ/AcAm latex RSV24.8dl/g polymer M
210/90 mole of %DMAEA.MCQ/AcAm latex RSV22.5dl/g polymer N
210/90 mole of %DMAEA.MCQ/AcAm dispersion RSV18.6dl/g polymer O
210/90 mole of %DMAEA.BCQ/AcAm dispersion RSV18.3dl/g polymer P
230/70 mole of %DMAEA.MCQ/AcAm latex RSV17.5dl/g polymer Q
310/90 mole of %DMAEA.MCQ/AcAm dry polymer RSV15.0dl/g
1According to the synthetic (IV=4.4dl/g) of example 1
2Conventional treatment can be from the Illinois, and the Nalco chemical company of Naperville obtains
3Dry polymer can be from GA, and the Chemtall of Riceboro obtains
4RSV (reduced viscosity) measures under 0.045% the concentration in 1.0 molar nitric acid sodium.Example 2
For determining to adopt following method according to the activity of the synthetic hydrophily dispersed polymeres of example 1.Estimate water filtering performance with vacuum drainage tester (VDT).The rare paper stock that is used for the VDT detection obtains at sample point from southern liner plate (linerboard) cardboard paper mill, and sample point is just before the substrate flow box.Because do not use retention agent/filter aid on paper machine, rare paper stock tale quale is tested.
Batching in the Britt jar with the 1000rpm agitation treatment.The VDT test is carried out with normal step, and the batching that is about to handle is transferred in the VDT chamber, filters by Filpaco#716 paper under the vacuum of 15 inches of mercury (7.84psi) then.Test condition provides in the table II.Filtration rate was explained with the used time of the filtrate of collecting 100 ml volumes.
The cationic polymer scheme has shown the activity that substrate is prepared burden with respect to untreated sample (blank).The table III has shown the VDT drainage data of the polymer of listing in the table 1.Less drainage time (for 100 milliliters fixed volume) means higher filtration rate.Therefore, filtration rate is high more, handles effective more.Result in the table III shows that hydrophily DADMAC/AcAm dispersed polymeres (dispersion I) is better than processed conventionally.And the water filtering performance of dispersion I is better than its latex analog, polymer I.In addition, the filtrate turbidity that obtains with dispersion I is obviously more clear than the polymer of other tests, and expression has reservation preferably.
The table II adopts the product of test condition polymer makedown 1% weight that unbleached liner plate batching carries out the polymer screening in the cage agitator 5～7 minutes in southern paper mill, rare
Be interpreted as the product of 0.1% weight, all dilute with running water.Single and the dual polymer program of the canned vaned PRMDDJ of dose of polymer 1ml=0.51b/tBritt (being used for the batching preparation) mixing speed 1000rpm time sequencing
Begin to stir
T=0 adds batching and coagulating agent second
T=10 adds flocculant second
T=20 stops to shift vacuum drainage tester standard step to VDT second, adopts Filaco#716 filter medium and 15 inches
Mercury column (7.84psi) vacuum.
100 milliliters of times that filter liquor is required collected in record
The VDT water filtering performance of unbleached liner plate batching cationic polymer scheme is adopted in paper mill, table III south
Example 3
| Dosage 1.0lb/t | Dosage 2.0lb/t | |
| Scheme (program) | 100 milliliters drainage time (second) | 100 milliliters drainage time (second) |
| Blank (no polymer) | ????40.47 | ????40.47 |
| Dispersion I | ????19.78 | ????16.78 |
| Polymer I | ????24.87 | ????18.18 |
| Polymer J | ????28.59 | ????19.46 |
| Polymer K | ????26.56 | ????18.58 |
| Polymer L | ????31.25 | ????15.21 |
| Polymer M | ????36.65 | ????19.87 |
| Polymer N | ????33.40 | ????26.50 |
| Polymer O | ????39.59 | ????31.37 |
| Polymer P | ????38.37 | ????28.59 |
The experiment of a series of VDT drainages is to adopt hydrophily to disperse DADMAC/AcAm polymer (dispersion I) and rare paper stock of obtaining from hardboard paper mill, Midwest carries out.Batching in the Britt jar with the 1000rpm stir process.The VDT test is undertaken by normal step, and the batching that is about to handle is transferred in the VDT chamber, filters by Filpaco#716 paper under the vacuum of 15 inches of mercury (7.84psi) then.The condition of test is listed in the table IV.
The results are summarized in the table V.Filtration rate was explained with the required time of the filtrate of collecting 400 ml volumes.The drainage time of collecting 400 milliliters of fixed volumes is few more, shows that performance is good more.The data of table V have shown the flexibility of hydrophily dispersed polymeres, and in view of the above, it can be used alone as aggregation processing (flocculant) or use as coagulating agent in the dual schemes with conventional flocculant (polymer Q, polymer N).
The table IV
Use product from test condition polymer makedown 1% weight of the hardboard in paper mill, Midwest batching screening polymer in the cage agitator, dilution is 0.1% weight
The product of amount.Single and the dual polymer program of the canned vaned PRM DDJ of dose of polymer 1ml=0.25lb/tBritt (being used for the batching preparation) mixing speed 1000rpm time sequencing
Begin to stir
T=0 adds batching and coagulating agent second
T=10 adds flocculant second
T=20 stops to adopt the Filaco#716 filter medium and 15 inches of mercury (7.84psi) to the transfer vacuum drainage tester of VDT second
The standard step of vacuum
400 milliliters of times that filtrate is required collected in record
Show the VDT water filtering performance of V with the cationic polymer scheme of the hardboard batching in paper mill, Midwest
| Scheme | Dosage lb/t | 400 milliliters drainage time (second) |
| Blank (no polymer) | ????- | ????45.44 |
| Dispersion I | ????0.25 | ????26.71 |
| Polymer Q | ????0.06 | ????30.18 |
| Dispersion I/ polymer Q | ????0.25/0.06 | ????22.12 |
| Polymer Q | ????0.13 | ????25.68 |
| Dispersion I/ polymer Q | ????0.25/0.13 | ????20.15 |
| Polymer N | ????0.06 | ????21.18 |
| Dispersion I/ polymer N | ????0.25/0.06 | ????19.25 |
Although relevant preferred or illustrative embodiment of the present invention is described in the above, these embodiments are also non exhaustive, also do not limit the present invention.Certainly, the present invention attempts to cover all selections, improvement and the equivalent in its spirit and scope that are defined by the following claims.
Claims (14)
1. a method of improving reservation and water filtering performance in paper-making process may further comprise the steps: a) form moisture cellulose paper making pulp; B) the hydrophily dispersed polymeres with effective dose joins in the slurry, wherein the hydrophily dispersed polymeres is formed by following monomer polymerization: ⅰ. a kind of cationic monomer diallyl-N, the disubstituted ammonium halide of N-, wherein the substituting group of said disubstituted ammonium halide is selected from C
1-C
20Alkyl, aryl, alkylaryl and aromatic alkyl; ⅱ. second monomer of following molecular formula
R wherein
1And R
2Be selected from hydrogen, C
1-C
10Alkyl, aryl and alkylaryl; R
3Be selected from one group that forms by hydrogen and methyl; R
4And R
5Be selected from by C
1-C
10One group of forming of straight or branched alkylidene and hydrogen; Wherein said polymerisation is under the condition that has dispersant to exist, and carries out in the aqueous solution of multivalent anions salt; C) the paper pulp filter is done to form paper; And d) with paper dryer.
2. the described method of claim 1, wherein said cationic monomer is a diallyldimethylammonium chloride, described second monomer is an acrylamide.
3. the described method of claim 1, wherein said hydrophily dispersed polymeres has the cationic charge from about 1mol% to about 50mol%.
4. the described method of claim 1, the inherent viscosity of wherein said hydrophily dispersed polymeres are about 0.5 to about 10 deciliter/gram.
5. the described method of claim 1, the inherent viscosity of wherein said hydrophily dispersed polymeres are about 1.5 to about 8.5 deciliter/gram.
6. the described method of claim 1, wherein said dispersed polymeres adds with the amount of about 0.05 to the 5.0 pound active matter of slurry solids per ton.
7. the described method of claim 1 further is included in and adds coagulating agent in the step b).
8. the described method of claim 1 further is included in and adds flocculant in the step b).
9. the described method of claim 1 further is included in and adds alum in the step b).
10. the described method of claim 8 further is included in and adds alum in the step b).
11. the described method of claim 9 further is included in and adds alum in the step b).
12. the described method of claim 1 further is included in and adds cationic starch in the step b).
13. the described method of claim 8 further is included in and adds cationic starch in the step b).
14. the described method of claim 9 further is included in and adds cationic starch in the step b).
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/US1999/000869 WO2000042253A1 (en) | 1999-01-15 | 1999-01-15 | Papermaking process utilizing hydrophilic dispersion polymers of diallyldimethyl ammonium chloride and acrylamide as retention and drainage aids |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1289380A true CN1289380A (en) | 2001-03-28 |
| CN1189623C CN1189623C (en) | 2005-02-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB998024716A Expired - Lifetime CN1189623C (en) | 1999-01-15 | 1999-01-15 | Papermaking process using hydrophilic dispersion polmers of diallyldi methyl ammonium chloride and acrylamide as retention and drainage aids |
Country Status (9)
| Country | Link |
|---|---|
| EP (1) | EP1082493B1 (en) |
| KR (1) | KR100572306B1 (en) |
| CN (1) | CN1189623C (en) |
| AU (1) | AU766846B2 (en) |
| BR (1) | BR9908576B1 (en) |
| DE (1) | DE69924371T2 (en) |
| DK (1) | DK1082493T3 (en) |
| NO (1) | NO326100B1 (en) |
| WO (1) | WO2000042253A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101016359B (en) * | 2007-03-06 | 2010-06-02 | 山东东方华龙工贸集团有限公司 | Method of preparing cationic polyacrylamide aqueous emulsion |
| CN101827973B (en) * | 2007-10-18 | 2013-11-06 | 坎普利斯公司 | Process for improving characteristics of pulp |
| CN111663366A (en) * | 2019-03-06 | 2020-09-15 | 荒川化学工业株式会社 | Dispersion for papermaking chemicals, paper strength enhancer containing the same, drainage enhancer, and yield enhancer |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8491753B2 (en) * | 2004-10-15 | 2013-07-23 | Nalco Company | Composition and method for improving retention and drainage in papermaking processes by activating microparticles with a promoter-flocculant system |
| CN100378163C (en) * | 2005-03-19 | 2008-04-02 | 徐州市众恒精细化工技术有限公司 | High copolymer pulp components for composite inorganic nanoparticles |
| WO2017147392A1 (en) | 2016-02-26 | 2017-08-31 | Ecolab Usa Inc. | Drainage management in multi-ply papermaking |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4913775A (en) * | 1986-01-29 | 1990-04-03 | Allied Colloids Ltd. | Production of paper and paper board |
| US5587415A (en) * | 1991-07-30 | 1996-12-24 | Hymo Corporation | Process for preparation of dispersion of water-soluble cationic polymer the dispersion produced thereby and its use |
| CA2102742A1 (en) * | 1992-11-10 | 1994-05-11 | Kevin S. Dell | Use of dadmac/acrylamide copolymer on newsprint machines |
| US5266164A (en) * | 1992-11-13 | 1993-11-30 | Nalco Chemical Company | Papermaking process with improved drainage and retention |
| EP0760406A3 (en) * | 1995-08-24 | 1997-09-17 | Nalco Canada Inc | Combination of poly (dadmac/acrylamide) and bentonite for deposition control in papermaking processes |
| ES2290960T3 (en) * | 1996-09-24 | 2008-02-16 | Nalco Chemical Company | HYDROPHILE DISPERSION POLYMERS FOR PAPER APPLICATIONS. |
-
1999
- 1999-01-15 WO PCT/US1999/000869 patent/WO2000042253A1/en active IP Right Grant
- 1999-01-15 AU AU23208/99A patent/AU766846B2/en not_active Expired
- 1999-01-15 DK DK99903105T patent/DK1082493T3/en active
- 1999-01-15 CN CNB998024716A patent/CN1189623C/en not_active Expired - Lifetime
- 1999-01-15 EP EP99903105A patent/EP1082493B1/en not_active Expired - Lifetime
- 1999-01-15 KR KR1020007007909A patent/KR100572306B1/en not_active IP Right Cessation
- 1999-01-15 DE DE69924371T patent/DE69924371T2/en not_active Expired - Lifetime
- 1999-01-15 BR BRPI9908576-3A patent/BR9908576B1/en not_active IP Right Cessation
-
2000
- 2000-07-18 NO NO20003678A patent/NO326100B1/en not_active IP Right Cessation
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101016359B (en) * | 2007-03-06 | 2010-06-02 | 山东东方华龙工贸集团有限公司 | Method of preparing cationic polyacrylamide aqueous emulsion |
| CN101827973B (en) * | 2007-10-18 | 2013-11-06 | 坎普利斯公司 | Process for improving characteristics of pulp |
| CN111663366A (en) * | 2019-03-06 | 2020-09-15 | 荒川化学工业株式会社 | Dispersion for papermaking chemicals, paper strength enhancer containing the same, drainage enhancer, and yield enhancer |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1082493A1 (en) | 2001-03-14 |
| NO326100B1 (en) | 2008-09-22 |
| KR20010040360A (en) | 2001-05-15 |
| EP1082493A4 (en) | 2002-06-05 |
| EP1082493B1 (en) | 2005-03-23 |
| AU766846B2 (en) | 2003-10-23 |
| NO20003678L (en) | 2000-09-12 |
| DK1082493T3 (en) | 2005-04-25 |
| DE69924371D1 (en) | 2005-04-28 |
| KR100572306B1 (en) | 2006-04-24 |
| CN1189623C (en) | 2005-02-16 |
| AU2320899A (en) | 2000-08-01 |
| DE69924371T2 (en) | 2005-09-15 |
| BR9908576A (en) | 2000-11-21 |
| NO20003678D0 (en) | 2000-07-18 |
| WO2000042253A1 (en) | 2000-07-20 |
| BR9908576B1 (en) | 2009-01-13 |
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