Betzdearborn, Inc.

Hercules Corporation

Solenis Technologies, L.p.

Betz Paperchem, Inc.

Betz Laboratories, Inc.

Hercules Incoporated

Solenis Technologies Cayman, L.p.

Tien-Feng Ling

Duy T Nguyen

Fushan Zhang

Xiang Huai Wang

William F Scholz

Mitzi K Fader

Kyle J Bottorff

David D Dreisbach

Davit E Sharoyan

Zhaoqing Liu

Scott Thomas Schnelle

Mark E Laurint

Theresa D Hancock

The current method relates to compositions and methods for inhibiting the deposition of organic contaminants in pulp and papermaking systems. The current method also relates to controlling the deposition of organic contaminants on equipment in the pulp and papermaking systems, which can cause both quality and efficiency problems. In particular the method relates to the use of non-sulfonated or slightly sulfonated lignin dispersions and solutions for inhibiting deposition of contaminants in pulp and paper making system.

Methods for inhibiting the deposition of organic contaminates in pulp and papermaking systems

Compositions and methods for reduction in adhesion between wet paper web and roll surfaces in papermaking process are disclosed. The method is particularly useful for improvements in press section roll release.

Papermaking additives for roll release improvement

A method for inhibiting resinous and sticky substances from filling or forming deposits on or within papermaking forming wire, by applying to said wire an effective inhibiting amount of a composition comprising at least one cationic agent selected from the group consisting of (a) cationic polyureas, (b) hydrophobically modified cationic polymers, (c) alkylammonium or/and alkylimidazolium salts, and optionally at least one nonionic amphiphilic copolymer selected from (i) hydrophobically modified polyethylene glycols], (ii) hydrophobically modified cellulose ethers, (iii) copolymers of vinyl alcohol and vinyl alkonate, (iv) polyoxyalkylene block copolymers, and (v) hydrophilically modified polydimethylsiloxanes.

Method of treating paper forming wire surface

Method for inhibiting scale deposits in an aqueous system. The method may include at least one of adding and forming anti-scalant in the aqueous system such that an amount of anti-scalant in the aqueous system is up to about 1000 ppm, wherein the anti-scalant comprises at least one of polyvalent metal silicate and polyvalent metal carbonate, wherein the aqueous system has a pH of at least about 9, and wherein a mean particle size of the anti-scalant is less than about 3 microns. The method may also include at least one of adding and forming anti-scalant in the aqueous system such that an amount of anti-scalant in the aqueous system is up to about 1000 ppm, wherein the anti-scalant comprises at least one of polyvalent metal silicate and polyvalent metal carbonate, and wherein the aqueous system has a pH of at least about 9; and adding dispersant to the aqueous system. The method may involve forming anti-scalant in the aqueous system such that an amount of anti-scalant in the aqueous system is up to about 1000 ppm, wherein the anti-scalant comprises at least one of polyvalent metal silicate and polyvalent metal carbonate, and wherein a mean particle size of the anti-scalant is less than about 3 microns. The method may further include at least one of adding and forming anti-scalant in the aqueous system, wherein the anti-scalant comprises at least one of polyvalent metal silicate and polyvalent metal carbonate; and adding at least one protein to the aqueous system. Compositions therefor.

Methods of preventing scaling involving inorganic compositions, and compositions therefor

Method for inhibiting scale deposits in an aqueous system. The method may include adding anti-scalant to the aqueous system such that an amount of anti-scalant in the aqueous system is up to about 500 ppm, wherein the anti-scalant comprises at least one of polyvalent metal silicate and polyvalent metal carbonate, and wherein the aqueous system has a pH of at least about 9. The method may include adding anti-scalant to the aqueous system such that an amount of anti-scalant in the aqueous system is up to about 500 ppm, wherein the anti-scalant comprises at least one of polyvalent metal silicate and polyvalent metal carbonate, in the presence of up to about 0.4 ppm of cationic polymer. The method may include adding anti-scalant to the aqueous system at at least one of before a pulping digester and at a pulping digester, such that an amount of anti-scalant in the aqueous system is up to about 500 ppm, wherein the anti-scalant comprises at least one of polyvalent metal silicate and polyvalent metal carbonate. The method may involve adding a nucleation promoter/initiator to the aqueous system to inhibit formation of scale deposits, such that an amount of the nucleation promoter/initiator in the aqueous system is up to about 500 ppm. The method may involve adding first cations to the aqueous system and removing second cations which are distinct from the first cations from the aqueous system, to inhibit the second cations from forming scale deposits, wherein the aqueous system is at a temperature of about 70&deg; C. to 500&deg; C. Inorganic compositions therefor.

Methods of preventing scaling involving inorganic compositions, and inorganic compositions therefor

The present invention provides for methods and compositions for removing stickies and pitch from papermaking fiber by first chemically treating the papermaking fiber with a composition of at least two of an oil-soluble or water-dispersible hydrophobic polymer, an oil soluble or water-dispersible surfactant having an HLB of about 1 to about 10, a tackifier, and an oil soluble or water-dispersible solvent then mechanically separating the agglomerated stickies and pitch from the papermaking fiber.

Methods and compositions for treating stickies

Methods for inhibiting the deposition of organic contaminants from pulp in pulp and papermaking systems are disclosed. Albumins, globulins or blends thereof and spray-dried animal blood cells are added to the pulp or sprayed onto deposition prone surfaces of a papermaking system suffering from organic contaminants.

Methods for inhibiting organic contaminant deposition in pulp and

A method of inhibiting the deposition of organic contaminants in a pulp and papermaking system comprising adding to the system an effective amount of a detackifying composition comprising a charged polymer and an oppositely charged surfactant, with the proviso that at least the polymer or the surfactant be surface active.

Method for inhibiting the deposition of organic contaminants in polp and

A method for enhancing the penetration of cooking liquor into wood chips to form a Kraft pulp which comprises adding to the cooking liquor specific surfactants such as ethoxylated dialkylphenols and ethoxylated alcohols.

Ethoxylated alcohol and dialkylphenol surfactants as Kraft pulping

In a papermaking operation which utilizes secondary fiber furnish containing hot melt or pressure sensitive adhesive contaminants, a method of inhibiting stickies comprising adding to the pulp slurry at least one surfactant selected from the group consisting of fatty alkanolamides and ethoxylated compounds in addition to a hydrocarbon solvent.

Growing community of inventors

Jacksonville, FL, United States of America

Tien-Feng Ling