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WO2019140206A1 - Composition de traitement du papier et procédé de production - Google Patents

Composition de traitement du papier et procédé de production Download PDF

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Publication number
WO2019140206A1
WO2019140206A1 PCT/US2019/013215 US2019013215W WO2019140206A1 WO 2019140206 A1 WO2019140206 A1 WO 2019140206A1 US 2019013215 W US2019013215 W US 2019013215W WO 2019140206 A1 WO2019140206 A1 WO 2019140206A1
Authority
WO
WIPO (PCT)
Prior art keywords
sulfate
acid
dry
enhancing composition
strength enhancing
Prior art date
Application number
PCT/US2019/013215
Other languages
English (en)
Inventor
David CREASEY
Jason CREASEY
Jerry CREASEY
Original Assignee
Iti Technologies, Inc.
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Iti Technologies, Inc. filed Critical Iti Technologies, Inc.
Publication of WO2019140206A1 publication Critical patent/WO2019140206A1/fr

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Classifications

    • 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
    • D21H23/00—Processes or apparatus for adding material to the pulp or to the paper
    • D21H23/02—Processes or apparatus for adding material to the pulp or to the paper characterised by the manner in which substances are added
    • D21H23/04—Addition to the pulp; After-treatment of added substances in the pulp
    • D21H23/20—Apparatus therefor
    • 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
    • D21H11/00—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only
    • D21H11/14—Secondary fibres
    • 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
    • D21H17/03—Non-macromolecular organic compounds
    • D21H17/05—Non-macromolecular organic compounds containing elements other than carbon and hydrogen only
    • D21H17/09—Sulfur-containing compounds
    • 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
    • D21H17/03—Non-macromolecular organic compounds
    • D21H17/05—Non-macromolecular organic compounds containing elements other than carbon and hydrogen only
    • D21H17/14—Carboxylic acids; Derivatives thereof
    • D21H17/15—Polycarboxylic acids, e.g. maleic acid
    • 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
    • D21H17/70—Inorganic compounds forming new compounds in situ, e.g. within the pulp or paper, by chemical reaction with other substances added separately
    • 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
    • D21H21/14—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 characterised by function or properties in or on the paper
    • D21H21/18—Reinforcing agents
    • 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
    • D21H17/64—Alkaline compounds
    • 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
    • D21H17/65—Acid compounds

Definitions

  • the present invention is related to the papermaking arts. More specifically, the present invention relates to a process for improving the dry strength and barrier properties in paper and paper products.
  • the invention relates to a process for making paper and a composition and method to increase the strength properties and improve the barrier properties of the paper.
  • the wet-end of the papermaking process refers to the stages of the papermaking process, wherein a pulp of fibers obtained from cellulose- based materials, such as recycled, used paper, wood, cotton, or alternative sources, is being processed.
  • the term "wet-end” refers to the high volume of water with which the pulp is mixed in the early stages of paper production.
  • the barrier properties of paper-based products may be enhanced by a variety of compounds which are known in the art. It is well known in the art that various polysaccharide compositions have been used as additives in the production of paper and paper products. It is desirable to provide polysaccharide compositions that may be useful in the production of paper products that have oil and grease resistance. The resulting paper products having enhanced characteristics of oil and grease resistance have utility in many applications. Among those applications, the paper products could be useful in food packaging, oil and grease resistant food containers, and release paper for frozen foods.
  • PFCs perfluorochemicals
  • POPs persistent organic pollutants
  • POPs organic pollutants
  • POPs are organic compounds that are resistant to environmental degradation through chemical, biological and photolytic processes.
  • POPs are characterized by high molecular mass, low water solubility, semi-volatility, high lipid solubility, and stability. These traits allow for bioaccumulation in fatty tissues of living organisms and slow metabolism, which confers the compound’s persistence and accumulation into chains.
  • the use of traditional coatings also results in significant product limitations. Abstaining from these traditional coatings, the use of water-based emulsions in combination with natural co binders has allowed for the development of a bio-based and biodegradable grease resistant paper which is recyclable and repulpable.
  • Maintaining high levels of dry strength is a critical parameter for many reasons.
  • a primary objective of this invention is to provide for improved dry strength in paper and paperboard products.
  • Another objective of this invention is to provide for improved barrier properties (i.e. grease resistance) to paper and paperboard products.
  • composition of matter formed by the following described method has been found to be effective in achieving improved dry strength and in improving the barrier properties in paper and paper board products.
  • a process for improving the dry strength of the paper by applying a dry-strength enhancing composition to pulp during a paper-making process said dry-strength enhancing composition comprising a solution comprising an acid mixed with at least one metal ion wherein the metal ion is generally provided as a metal sulfate or a solubilized sulfate to form a mixture (I), wherein the mixture generates an exothermic reaction to form a mixture (II) and wherein the mixture is cooled to form the dry-strength enhancing composition.
  • Figure 1 is an illustration of a paper making process.
  • Figure 2 is an illustration of a paper making machine.
  • Figure 3 is an illustration of a paper making machine.
  • Figure 4 is an illustration of an embodiment of a composition blending system.
  • Figure 5 is an illustration of an embodiment of a composition blending system.
  • Figure 6 is an illustration of an embodiment of a cooling system and reaction vessel.
  • Figure 7 is an illustration of an embodiment of a cooling system.
  • Figure 8 is an illustration of an embodiment of a reaction vessel.
  • Paper is generally a matted or felted sheet of fibers usually vegetable but sometimes mineral, animal, or synthetic formed on a screen from a water suspension.
  • the term "paper” is specifically limited to lighter weight, thinner, more flexible sheets formed in this manner. Sheets that are 0.012 inch (0.3 millimeter) or more in thickness, including Bristol board, container board, boxboard, wallboard, and so forth, are classified as paperboard.
  • Paper product refers to any material produced by pressing moist fibers (i.e. cellulose pulp) derived from plant materials. Paper products may include paper of any thickness or basis weight, corrugated board, paperboard, or any combination thereof.
  • the paper coating composition may be applied to a product or paper product using any method known in the industry including, but not limited to, immersion, rolling, spraying, padding or a combination thereof).
  • Vegetable fibers for the manufacture of paper are obtained from many materials, including woods (spruce, fir, pine, hemlock, birch, poplar, gum, and others), cotton and linen rags, cotton linters, bagasse, bamboo, manila rope, esparto, cereal straws, flax straw, bast fibers from mulberry bark and mitsumata, and wastepaper.
  • Mineral and synthetic papermaking materials include gypsum, asbestos, glass fiber, and synthetic polymers.
  • Rag papers may vary in rag content from 100% to 25%, the rest being wood pulp. The lower the rag content of a paper, the less it resembles an all-rag paper. Not until 1851 did the science of chemistry give the paper industry a process for turning trees into paper through the manufacture of pulp from wood. By the mid-20th century, however, over 90% of all papermaking fibers were derived from wood pulp.
  • the pulp used in the instant invention may be prepared by any method known in the art.
  • the main objective of the pulping process is the separation of the wood into its individual fibers of cellulose.
  • the fibers are 0.12 to 0.2 inches (3-5 millimeters) long in the case of softwoods and slightly over 0.04 inch (1 millimeter) long in hardwoods; they are 0.0008 to 0.0012 inch (0.02-0.03 millimeter) in diameter.
  • Wood contains about 50% cellulose, 30% lignin (which binds the fibers together), and 20% hemicellulose, resin, and fats.
  • any of a variety of processes may be used, ranging from fully mechanical to fully chemical systems.
  • bark Prior to the pulping process, bark (which is not suited for papermaking) must be removed from the logs.
  • the logs are conveyed for this purpose into huge, horizontal drums that rotate to remove the bark by mechanical abrasion.
  • Other mechanical bark- removing devices include impact, chain, and scraper machines; bark may also be removed by chemical or hydraulic methods.
  • the bark is burned in combination fuel boilers to produce process steam or electricity.
  • the debarked logs are fed to a chipper, a huge rotating disk carrying 10 to 15 knives.
  • the chips are screened to remove oversized and undersized chips, and the acceptable chips are conveyed to the pulp mill.
  • Stone groundwood pulp is made by grinding logs or blocks (bolts) of wood against a revolving abrasive stone in the presence of water.
  • the logs are debarked but not chipped, fed to the grinder, and forced against the revolving stone by mechanical means.
  • Chip groundwood or refiner mechanical pulp
  • Chip groundwood is produced by feeding chips or sawdust between a set of rotating, ridged plates (or disks) of a disk refiner.
  • An extension of the chip groundwood process is the thermomechanical process in which steam softens the chips prior to reduction in pressurized disk refiners.
  • the wood chips for semichemical pulp undergo a relatively mild chemical treatment prior to mechanical defibration in a disk refiner.
  • the chemical treatment usually consists of sodium sulfite solution buffered with sodium carbonate or
  • bicarbonate or is a kraft green liquor (a solution containing soda ash and sodium sulfide).
  • Some semichemical mills have switched to the "no-sulfur" process, in which soda ash alone or in combination with caustic soda is used as the cooking liquor.
  • the semichemical process lends itself well to hardwoods, and pulp yields are in the range of 70% to 80%. The pulp is used most often in the manufacture of corrugated medium (the fluted portion of corrugated board).
  • the chemical pulping processes are either acid (sulfite) or alkaline (soda and kraft) in nature, and the object of the cooking-liquor solution is to dissolve the non cellulose components of the wood, especially the lignins, leaving the residual cellulose. Chips are "cooked” in the liquor under high temperatures and pressures in large retorts, called digesters, either in batches or continuously.
  • Straw, esparto, bamboo, cotton linters, bagasse, and other natural fibrous materials are converted into paper pulps by means of modified versions of the
  • De-inking the process of removing ink and coatings from recycled wastepapers, is usually accomplished with caustic soda in combination with soda ash, sodium silicate, peroxide (for whitening), and other chemicals. De-inked and repulped wastepaper is an important supplementary source of pulp.
  • bleaching agent To produce white fibers from the brown or pale-yellow pulps, treatment with a bleaching agent is required.
  • the nature of the bleaching operation depends on several factors: the type of raw material used to make the pulp, the pulping process, the degree of whiteness desired, and the purpose for which the pulp is to be used.
  • Bleaching carries further the fiber purification accomplished in the pulping process. In the case of wood pulp, traces of lignin and other colored substances are removed or converted to colorless forms by bleaching. Most bleaching processes use an oxidizing agent
  • chlorine a hypochlorite, chlorine dioxide, or hydrogen peroxide
  • a strong reducing agent such as sodium hydrosulfite, or a strong oxidizing agent such as hydrogen peroxide, or both in sequence
  • oxygen as a partial replacement of chlorine in the first stage. The result is a reduction in the use of chlorine and water, and reduced effluents.
  • Bleaching of wood pulp usually is carried out in stages (from three to six or seven separate operations) in order to control the process and particularly in order to limit damage to the cellulose fiber, since paper made from overbleached pulp does not have full strength.
  • pulp fibers After the pulp fibers have been thoroughly washed to remove chemicals and impurities, they are given a mechanical treatment termed stock preparation (or beating and refining). Fibers that have been abraded and fibrillated by the knife edges or bars in the beater or refiner make stronger and denser papers than do the unrefined fibers. At this stage, rosin and alum are added to size the paper, thereby increasing its water resistance and rendering it suitable for pen-and-ink writing; and pigments and dyes are added to pulps from which colored papers will be made. To produce papers with special properties, wax emulsions, fillers (including clay and titanium dioxide), and other materials may be added during beating. Subsequently the mixture of fiber and water may be fed to a Jordan refiner, in which a shearing action cuts the fibers to shorter lengths.
  • stock preparation or beating and refining
  • the fiber/water mixture containing more than 99% water, flows through a headbox to a finely woven endless wire-screen belt, which runs at speeds ranging from 300 to 3,000 feet (90-900 meters) per minute, and even faster in some instances.
  • the screen is given a horizontal shake to facilitate the formation of the wet web of paper, and water is drained through the screen, leaving the fibers on top. Suction boxes beneath the screen increase the rate of drainage.
  • the newly formed web of paper is carried by an endless belt to press rolls, which remove more water and smooth the paper.
  • the paper is conveyed over a series of steam-heated rotating drums (driers) to be dried to a predetermined moisture content.
  • the paper may be passed through a calender stack at the dry end of the paper machine.
  • a calender stack A few examples of the overall process are shown illustrated in Figures 1 , 2 and 3.
  • twin-wire formers the sheet is produced between two wire belts arranged in a more or less vertical orientation. Water is drained from the sheet in both directions, resulting in more rapid, controlled drainage and improved uniformity on both sides of the sheet. Twin-wire formers also operate at higher speeds and take up considerably less space than the horizontal fourdrinier table.
  • the web of paper is formed on a cylindrical drum whose outer wall is a screen.
  • the cylindrical screen mold is partially immersed in a vat of dilute pulp stock. As the stock water flows through the screen, its pulp content is deposited on the screen to make a web of paper.
  • the cylinder is evacuated continually to maintain the flow of stock water through the screen. As the newly formed web is rotated out of the stock, it is picked up by an endless belt of felt and carried on for further treatment. Frequently batteries of cylinder machines are employed, and as the felt passes over each successive machine a new layer of paper is added. Cylinder machines are particularly suited for manufacturing multilayer sheets of paper whose outer layers are constituted of pulps differing in kind or color from the pulp used to make the inner layers.
  • the paper When it leaves the paper machine, the paper, sometimes over 20 feet (6 meters) wide, is ready to be cut to size and finished for shipment. Finishing operations performed after the paper is wound on a large roll at the paper machine include slitting to form smaller rolls, rewinding, sheeting, trimming, sorting, counting, and packaging. Certain grades of paper are super-calendered to give them a high degree of
  • Coating materials which produce special surface characteristics, may be applied either during the finishing stage (conventional coating) or while the paper is still on the paper machine (machine coating).
  • the instant invention includes a composition of matter which enhances the dry- strength of paper products.
  • the dry-strength enhancing composition is a solution comprising an acid selected from the group including: phosphoric acid, fumaric acid, nitric acid, sulfurous acid, sulfonic acid, perchloric acid, acetic acid, sulfuric acid or a combination thereof, mixed with at least one metal ion selected from zinc, magnesium, manganese, nickel, and iron, wherein the metal ion is generally provided as a metal sulfate or a solubilized sulfate solution comprising water and a sulfate selected from the group including sodium sulfate, ammonium sulfate, magnesium sulfate, zinc sulfate, manganese sulfate, barium sulfate, calcium sulfate, iron sulfate, potassium sulfate, nickel sulfate, radium sulfate, strontium sulfate and dihyro-sulfate to form a mixture
  • composition has a pH value of less than 6.5.
  • the first basic ingredient used is a strong, low pH acid such as, phosphoric acid, fumaric acid, nitric acid, sulfurous acid, sulfonic acid, perchloric acid, acetic acid, sulfuric acid or a combination thereof.
  • the acid is a food grade acid.
  • the acid is of at least 90%, 91 %, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99% or 99.9% purity.
  • the acid may also be between approximately 98% to approximately 99.9% purity.
  • the acid is mixed with at least one metal ion selected from zinc, magnesium, manganese, nickel, and iron wherein the metal ion is generally provided as a metal sulfate or a solubilized sulfate solution.
  • the next basic ingredient used is water selected from the group comprising: distilled water, deionized water, purified water, filtered water, pharmaceutical grade water, medical grade water, reverse osmosis water, or a combination thereof.
  • the water preferably has a mega Ohm count between 5 -19.
  • the water is combined with a sulfate selected from the group including sodium sulfate, ammonium sulfate, magnesium sulfate, zinc sulfate, manganese sulfate, barium sulfate, calcium sulfate, iron sulfate, potassium sulfate, nickel sulfate, radium sulfate, strontium sulfate and dihyro-sulfate to form a solubilized sulfate.
  • a sulfate selected from the group including sodium sulfate, ammonium sulfate, magnesium sulfate, zinc sulfate, manganese sulfate, barium sulfate, calcium sulfate, iron sulfate, potassium sulfate, nickel sulfate, radium sulfate, strontium sulfate and dihyro-sulfate to form
  • the acid and the solubilized sulfate are combined within a reaction vessel to form a mixture (I).
  • the reaction vessel may be any vessel known in the art which can sustain the temperatures generated during the formation of the instant dry-strength enhancing composition.
  • the interior of the reaction vessel is coated with an inert material such as Teflon®, Kynar®, PVC, CPVC, Viton® and stainless steel.
  • the reaction vessel is an inline blending apparatus to which no pressure is added as the acid and the solubilized sulfate (mixture (I)) passes through the reaction vessel.
  • the reaction generated when the acid in the solubilized sulfate passed through the reaction vessel is an exothermic reaction which generates temperatures in the range of 200°F to 800°F, 300°F to 800 °F, 400°F to 700°F, 500°F to 800°F, 600°F to 800°F.
  • a cooling jacket surrounds the reaction vessel in order to control the temperature as the reaction takes place and the dry-strength enhancing composition is formed.
  • the dry-strength enhancing composition then leaves the reaction vessel and is carried to the cooling system where the temperature is further decreased.
  • the coolant used in either the cooling jacket or the cooling system is an air coolant, a liquid coolant, a gas coolant, or a combination thereof.
  • the liquid coolant is selected from the group including: water, ethylene glycol, diethylene glycol, propylene glycol, polyalkylene glycol, poly glycol, betaine, or a combination thereof.
  • the gas coolant is selected from the group including: inert gas, hydrogen, nitrogen, carbon dioxide, or a combination thereof.
  • the dry-strength enhancing composition is produced in a continuous process.
  • the dry-strength enhancing composition has a pH value of less than 6, less than 5, less than 4, less than 3, or less than 2.
  • the dry-strength enhancing composition is added to or applied to pulp during the paper-making process.
  • the dry-strength enhancing composition is a solution comprising an acid selected from the group including: phosphoric acid, fumaric acid, nitric acid, sulfurous acid, sulfonic acid, perchloric acid, acetic acid, sulfuric acid or a combination thereof, mixed with a solubilized sulfate solution comprising water and a sulfate selected from the group including sodium sulfate, ammonium sulfate,
  • the first basic ingredient used is a strong, low pH acid such as, phosphoric acid, fumaric acid, nitric acid, sulfurous acid, sulfonic acid, perchloric acid, acetic acid, sulfuric acid or a combination thereof.
  • the acid is a food grade acid.
  • the acid is of at least 90%, 91 %, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99% or 99.9% purity.
  • the acid may also be between approximately 98% to approximately 99.9% purity.
  • the next basic ingredient used is water selected from the group comprising: distilled water, deionized water, purified water, filtered water, pharmaceutical grade water, medical grade water, reverse osmosis water, or a combination thereof.
  • the water preferably has a mega Ohm count between 5 -19.
  • the water is combined with a sulfate selected from the group including sodium sulfate, ammonium sulfate, magnesium sulfate, zinc sulfate, manganese sulfate, barium sulfate, calcium sulfate, iron sulfate, potassium sulfate, nickel sulfate, radium sulfate, strontium sulfate and dihyro-sulfate to form a solubilized sulfate.
  • a sulfate selected from the group including sodium sulfate, ammonium sulfate, magnesium sulfate, zinc sulfate, manganese sulfate, barium sulfate, calcium sulfate, iron sulfate, potassium sulfate, nickel sulfate, radium sulfate, strontium sulfate and dihyro-sulfate to form
  • the acid and the solubilized sulfate are combined within a reaction vessel to form a mixture (I).
  • the reaction vessel may be any vessel known in the art which can sustain the temperatures generated during the formation of the instant dry-strength enhancing composition.
  • the interior of the reaction vessel is coated with an inert material such as Teflon®, Kynar®, PVC, CPVC, Viton® or stainless steel.
  • the reaction vessel is an inline blending apparatus to which no pressure is added as the acid and the solubilized sulfate (mixture (I)) passes through the reaction vessel.
  • the reaction generated when the acid in the solubilized sulfate passed through the reaction vessel is an exothermic reaction which generates temperatures in the range of 200°F to 800°F, 300°F to 800 °F, 400°F to 700°F, 500°F to 800°F, 600°F to 800°F.
  • a cooling jacket surrounds the reaction vessel in order to control the temperature as the reaction takes place and the dry- strength enhancing composition is formed.
  • the dry-strength enhancing composition then leaves the reaction vessel and is carried to the cooling system where the temperature is further decreased.
  • the coolant used in either the cooling jacket or the cooling system is an air coolant, a liquid coolant, a gas coolant, or a combination thereof.
  • the liquid coolant is selected from the group including: water, ethylene glycol, diethylene glycol, propylene glycol, polyalkylene glycol, poly glycol, betaine, or a combination thereof.
  • the gas coolant is selected from the group including: inert gas, hydrogen, nitrogen, carbon dioxide, or a combination thereof.
  • the dry-strength enhancing composition is produced in a continuous process.
  • the dry-strength enhancing composition has a pH value of less than 6.6, less than 6.5, less than 6, less than 5, less than 4, less than 3, or less than 2.
  • the dry-strength enhancing composition is added to or applied to pulp during the paper-making process.
  • an acidic, dry-strength enhancing composition blending system 10, 1 10 which includes a solubilized sulfate tank 20, 120 connected to reaction vessel 40, 140 by a pipe 24, 124.
  • the flow of solubilized sulfate is controlled by a first valve 22, 122 located at the input end 25, 125 of the pipe 24, 124 and a second valve 27, 127 located at the output end 26, 126 of the pipe 24, 124.
  • the system 10, 1 10 further includes an acid tank 30, 130 used as a holding tank for the acid utilized in the process.
  • the acid tank 30, 130 is connected to the reaction vessel 40, 140 by a pipe 34, 134.
  • the flow of acid is controlled by a first valve 32, 132 located at the input end 35, 135 of the pipe 34, 134 and a second valve 37, 137 located at the output end 36, 136 of the pipe 34, 134.
  • vent line 45, 145 Extending upward from the reaction vessel 40, 140 is a vent line 45, 145 which includes a control valve 47, 147 and a check valve 46, 146.
  • the acid is added to an injection port that is 1 ⁇ 4” to 2” in size at a flowrate which is adjustable.
  • the sulfonated solution (10-80% saturated) is added to another injection port that is 1 ⁇ 4” to 2” in size at a flowrate which is adjustable.
  • Both injection ports are secured to the in-line static mixer(s) located within the reaction vessel.
  • the acid and the sulfonated solution will start the blending process inside of the piping system.
  • the piping system will include in-line static mixers and pipping channels (1 -2”) approximately 4-25 feet long.
  • the blending portion of the piping will be covered with a cooling jacket/bath.
  • composition completes the blending process, it will continue to the cooling system. This will allow the dry-strength enhancing composition to cool down prior to going to a holding tank.
  • reaction vessels 40 are illustrated.
  • the reaction vessel lies one or more in-line static mixers 44, 144, 244 through which the acid in the solubilized sulfate pass, are mixed thoroughly and react.
  • the fall cooling tower cell 50, 150, 250 Surrounding the static mixers is the fall cooling tower cell 50, 150, 250 which includes a chamber 255 and a plurality of baffles 254.
  • Each reaction vessel 40 further includes an outer casing 41 which encases the cooling tower cell.
  • a plurality of valves 42, 142, 242 are secured to the outer casing which control the flow of coolant both from a coolant reservoir 51 , 151 , 251 through output pipes 52, 152, 252, into the fall tower cooling cell and back to the coolant reservoir through input pipes 53, 153, 253.
  • the coolant from the coolant reservoir 51 , 151 , 251 flows through the chamber 255 over the outer surface of the in-line static mixers 44, 144, 244 while being agitated by a plurality of baffles 254 to ensure optimal heat exchange between the coolant in the in-line static mixer.
  • the input pipes 53 and the output pipes 52 are to be connected to a coolant reservoir 51 (connection not illustrated).
  • Flow through this pipe is controlled by a valve 59, 159, 259.
  • Figures 6 and 7 provide detailed embodiments of a cooling system 70, 170, 270.
  • the cooling system is a series of pipes which make up a product he diffusion pathway 275 which are surrounded by a coolant absorption pathway 282.
  • the dry-strength enhancing composition enters the cooling system 70, 170, 270 through an input 272 and travels through the product heat diffusion pathway 275 where heat is extracted from the dry- strength enhancing composition. He is extracted from the dry-strength enhancing composition by coolant stored in a coolant tank 280 which travels through an output pipe 281 , through the coolant absorption pathway 282 (where heat is extracted), and back to the coolant tank through an output pipe 283. Flow to and from the coolant tank is controlled by a pair of valves 257. The composition then leaves the cooling system through an output 274 to a discharge line 95, 195, 295 and into a holding tank 98, 198, 298. Flow from the output 274 to the discharge line 95, 195, 295 is controlled by one or more valves 297.
  • control console 65, 165 and a programmable logic controller (PLC) 60, 160 which are used to control the process and the valves associated with the production of the dry-strength enhancing
  • the instant invention also includes a composition of matter which is prepared by the process of providing an acid selected from the group including phosphoric acid, fumaric acid, nitric acid, sulfurous acid, sulfonic acid, perchloric acid, acetic acid, sulfuric acid or a combination thereof, providing a solubilized sulfate solution comprising water and a sulfate selected from the group including sodium sulfate, ammonium sulfate, magnesium sulfate, zinc sulfate, manganese sulfate, barium sulfate, calcium sulfate, iron sulfate, potassium sulfate, nickel sulfate, radium sulfate, strontium sulfate and dihyro-sulfate, combining the acid and the solubilized sulfate within a reaction vessel to form a mixture (I), wherein the mixture generates an exothermic reaction, generating temperatures in the range of 150°
  • the composition of matter is prepared by the process of providing an acid selected from the group including phosphoric acid, fumaric acid, nitric acid, sulfurous acid, sulfonic acid, perchloric acid, acetic acid, sulfuric acid or a combination thereof, providing at least one metal ion selected from zinc, magnesium, manganese, nickel, and iron, wherein the metal ion is generally provided as a metal sulfate or a solubilized sulfate solution comprising water and a sulfate selected from the group including sodium sulfate, ammonium sulfate, magnesium sulfate, zinc sulfate, manganese sulfate, barium sulfate, calcium sulfate, iron sulfate, potassium sulfate, nickel sulfate, radium sulfate, strontium sulfate and dihyro-sulfate, combining the acid and the solubilized
  • the reaction vessel may be any vessel known in the art which can sustain the temperatures generated during the formation of the instant dry-strength enhancing composition.
  • the interior of the reaction vessel is coated with an inert material such as Teflon®, Kynar®, PVC, CPVC, Viton® and stainless steel.
  • the reaction vessel is an inline blending apparatus to which no pressure is added as the acid and the solubilized sulfate (mixture (I)) passes through the reaction vessel.
  • the reaction generated when the acid in the solubilized sulfate passed through the reaction vessel is an exothermic reaction which generates temperatures in the range of 200°F to 800°F, 300°F to 800 °F, 400°F to 700°F, 500°F to 800°F, 600°F to 800°F.
  • a cooling jacket surrounds the reaction vessel in order to control the temperature as the reaction takes place and the dry-strength enhancing composition is formed.
  • the dry-strength enhancing composition then leaves the reaction vessel and is carried to the cooling system where the temperature is further decreased.
  • the coolant used in either the cooling jacket or the cooling system is an air coolant, a liquid coolant, a gas coolant, or a combination thereof.
  • the liquid coolant is selected from the group including: water, ethylene glycol, diethylene glycol, propylene glycol, polyalkylene glycol, poly glycol, betaine, or a combination thereof.
  • the gas coolant is selected from the group including: inert gas, hydrogen, nitrogen, carbon dioxide, or a combination thereof.
  • the dry-strength enhancing composition is produced in a continuous process.
  • the dry-strength enhancing composition has a pH value of less than 6, less than 5, less than 4, less than 3, or less than 2.
  • composition of matter is prepared by the process of providing an acid selected from the group including phosphoric acid, fumaric acid, nitric acid, sulfurous acid, sulfonic acid, perchloric acid, acetic acid, sulfuric acid or a combination thereof, providing a solubilized sulfate solution comprising water and a sulfate selected from the group including sodium sulfate, ammonium sulfate,
  • the composition of matter is prepared by the process of providing an acid selected from the group including phosphoric acid, fumaric acid, nitric acid, sulfurous acid, sulfonic acid, perchloric acid, acetic acid, sulfuric acid or a combination thereof, providing at least one metal ion selected from zinc, magnesium, manganese, nickel, and iron, wherein the metal ion is generally provided as a metal sulfate or a solubilized sulfate solution comprising water and a sulfate selected from the group including sodium sulfate, Ammonium sulfate, magnesium sulfate, zinc sulfate, manganese sulfate, Barium Sulfate, Calcium Sulfate, Iron Sulfate, Potassium Sulfate, Nickel Sulfate, radium sulfate, Strontium Sulfate and dihyro-sulfate, combining the acid and the solubilized sulfate
  • the reaction vessel may be any vessel known in the art which can sustain the temperatures generated during the formation of the instant dry-strength enhancing composition.
  • the interior of the reaction vessel is coated with an inert material such as Teflon®, Kynar®, PVC, CPVC, Viton® and stainless steel.
  • the reaction vessel is an inline blending apparatus to which no pressure is added as the acid and the solubilized sulfate (mixture (I)) passes through the reaction vessel.
  • the reaction generated when the acid in the solubilized sulfate passed through the reaction vessel is an exothermic reaction which generates temperatures in the range of 200°F to 800°F, 300°F to 800 °F, 400°F to 700°F, 500°F to 800°F, 600°F to 800°F.
  • a cooling jacket surrounds the reaction vessel in order to control the temperature as the reaction takes place and the dry-strength enhancing composition is formed.
  • the dry-strength enhancing composition then leaves the reaction vessel and is carried to the cooling system where the temperature is further decreased.
  • the coolant used in either the cooling jacket or the cooling system is an air coolant, a liquid coolant, a gas coolant, or a combination thereof.
  • the liquid coolant is selected from the group including: water, ethylene glycol, diethylene glycol, propylene glycol, polyalkylene glycol, poly glycol, betaine, or a combination thereof.
  • the gas coolant is selected from the group including: inert gas, hydrogen, nitrogen, carbon dioxide, or a combination thereof.
  • the dry-strength enhancing composition is produced in a continuous process.
  • the dry-strength enhancing composition has a pH value of less than 6, less than 5, less than 4, less than 3, or less than 2.
  • the instant invention also includes a method of producing a dry-strength enhancing composition comprising the steps of:
  • the instant invention also includes a method of producing a dry-strength enhancing composition comprising the steps of:
  • metal ion selected from zinc, magnesium, manganese, nickel, and iron; wherein the metal ion is generally provided as a metal sulfate or a solubilized sulfate solution comprising water and a sulfate selected from the group including sodium sulfate, ammonium sulfate, magnesium sulfate, zinc sulfate, manganese sulfate, barium sulfate, calcium sulfate, iron sulfate, potassium sulfate, nickel sulfate, radium sulfate, strontium sulfate and dihyro- sulfate;
  • dry-strength enhancing composition has a pH value of less than 6.5;
  • reaction vessel is an inline blending apparatus to which no pressure is added as the acid and the solubilized sulfate (mixture (I)) passes through the reaction vessel.
  • the inline blending apparatus is a static inline mixer which continuously blends the acid and the solubilized sulfate (mixture (I)) as it passes through the reaction vessel.
  • the instant invention also includes another method of producing a dry-strength enhancing composition comprising the steps of:
  • a solubilized sulfate solution comprising water and a sulfate selected from the group including sodium sulfate, Ammonium sulfate, magnesium sulfate, zinc sulfate, manganese sulfate, Barium Sulfate, Calcium Sulfate, Iron Sulfate, Potassium Sulfate, Nickel Sulfate, radium sulfate, Strontium Sulfate and dihyro-sulfate;
  • a sulfate selected from the group including sodium sulfate, Ammonium sulfate, magnesium sulfate, zinc sulfate, manganese sulfate, Barium Sulfate, Calcium Sulfate, Iron Sulfate, Potassium Sulfate, Nickel Sulfate, radium sulfate, Strontium Sulfate and dihyro-sulfate;
  • the instant invention also includes a method of producing a dry-strength enhancing composition comprising the steps of:
  • the metal ion is generally provided as a metal sulfate or a solubilized sulfate solution comprising water and a sulfate selected from the group including sodium sulfate, Ammonium sulfate, magnesium sulfate, zinc sulfate, manganese sulfate, Barium Sulfate, Calcium Sulfate, Iron Sulfate, Potassium Sulfate, Nickel Sulfate, radium sulfate, Strontium Sulfate and dihyro- sulfate;
  • a metal sulfate selected from the group including sodium sulfate, Ammonium sulfate, magnesium sulfate, zinc sulfate, manganese sulfate, Barium Sulfate, Calcium Sulfate, Iron Sulfate, Potassium Sulfate, Nickel Sulfate, radium sulfate, Strontium Sulfate and dihy
  • dry-strength enhancing composition has a pH value of less than 6.5; and (e) applying the dry-strength enhancing composition to pulp during a paper making process and to enhance the dry strength of the paper.
  • reaction vessel is an inline blending apparatus to which no pressure is added as the acid and the solubilized sulfate (mixture (I)) passes through the reaction vessel.
  • the inline blending apparatus is a static inline mixer which continuously blends the acid and the solubilized sulfate (mixture (I)) as it passes through the reaction vessel.
  • the reaction vessel may be any vessel known in the art which can sustain the temperatures generated during the formation of the instant dry-strength enhancing composition.
  • the interior of the reaction vessel is coated with an inert material such as Teflon®, Kynar®, PVC, CPVC, Viton® and stainless steel.
  • the reaction vessel is an inline blending apparatus to which no pressure is added as the acid and the solubilized sulfate (mixture (I)) passes through the reaction vessel.
  • the reaction generated when the acid in the solubilized sulfate passed through the reaction vessel is an exothermic reaction which generates temperatures in the range of 200°F to 800°F, 300°F to 800 °F, 400°F to 700°F, 500°F to 800°F, 600°F to 800°F.
  • a cooling jacket surrounds the reaction vessel in order to control the temperature as the reaction takes place and the dry-strength enhancing composition is formed.
  • the dry-strength enhancing composition then leaves the reaction vessel and is carried to the cooling system where the temperature is further decreased.
  • the coolant used in either the cooling jacket or the cooling system is an air coolant, a liquid coolant, a gas coolant, or a combination thereof.
  • the liquid coolant is selected from the group including: water, ethylene glycol, diethylene glycol, propylene glycol, polyalkylene glycol, poly glycol, betaine, or a combination thereof.
  • the gas coolant is selected from the group including: inert gas, hydrogen, nitrogen, carbon dioxide, or a combination thereof.
  • composition of matter is applied or added at various stages during the paper product making process.
  • the composition of matter may be applied or added a single time during the process or multiple times.
  • the composition of matter may be added or applied by any means or process known in the art.
  • the addition of the composition of matter may require buffering which can be accomplished with any buffering agent known in the art (i.e. NaOH).
  • composition of matter allows for the same amount of starch to be used as is customary in the art.
  • the composition of matter acts to thin the starch out to enhance the qualities bestowed on the paper product from the starch.
  • the composition of matter is added while in the pulp stage of the paper product-making process, prior to rolling.
  • the paper is then manufactured by any manner known in the art.
  • the composition of matter is added to the paper product after the paper product has been pressed, but prior to drying (i.e. added during the starch line).
  • composition of matter acts as a nucleating agent for calcium which is added during the paper product-making process.
  • the resulting paper products may be used for the packaging of foodstuffs as they are food-safe.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Paper (AREA)

Abstract

L'invention concerne un procédé d'amélioration de la résistance à sec du papier par application d'une composition améliorant la résistance à sec à la pâte à papier pendant un procédé de fabrication du papier, ladite composition améliorant la résistance à sec comprenant une solution comprenant un acide mélangé avec au moins un ion métallique, l'ion métallique étant généralement fourni sous la forme d'un sulfate métallique ou d'un sulfate solubilisé pour former un mélange (I), le mélange générant une réaction exothermique pour former un mélange (II) et le mélange étant refroidi pour former la composition améliorant la résistance à sec.
PCT/US2019/013215 2018-01-11 2019-01-11 Composition de traitement du papier et procédé de production WO2019140206A1 (fr)

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US201862616080P 2018-01-11 2018-01-11
US62/616,080 2018-01-11
US16/245,738 US20190211508A1 (en) 2018-01-11 2019-01-11 Paper Processing Composition and Process of Production
US16/245,738 2019-01-11

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CN110331615B (zh) * 2019-07-24 2021-07-30 浙江景兴纸业股份有限公司 一种提高废纸浆强度性能的方法
US20210381169A1 (en) * 2020-06-09 2021-12-09 Iti Technologies, Inc. Paper enhancing compositions, uses thereof and enhanced paper

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US4223129A (en) * 1978-09-01 1980-09-16 A. E. Staley Manufacturing Company Continuous process for making alkyl aldosides from starch or other carbohydrates
US5061374A (en) * 1989-12-18 1991-10-29 Micron Technology, Inc. Reverse osmosis as final filter in ultrapure deionized water system
US20040258818A1 (en) * 2003-06-20 2004-12-23 Kraft Foods Holdings, Inc. Reduced acidic flavor in acidified starch products
US20120063261A1 (en) * 2004-09-10 2012-03-15 Mukesh Kapila Apparatus and method for homogenizing two or more fluids of different densities
US20120214930A1 (en) * 2009-08-24 2012-08-23 Ashland Licensing And Intellectual Property Llc. Anionic cross-linked polymers in water-in-water polymer dispersions
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