Use of water-soluble polymer complexes in aqueous systems
A water-soluble interjacent complex that includes a first water-soluble polymer and one or more water-soluble monomers polymerized to form a second water-soluble polymer in the presence of the first water-soluble polymer. The water-soluble interjacent complex forms a solution in water that is free of insoluble polymer particles. The interjacent complexes may be used to treat a waste sludge by adding an effective amount thereof to the waste sludge. The interjacent complexes may also be used in making paper by adding an effective amount thereof to a pulp or a forming sheet at a suitable location on a paper making machine. The interjacent complexes may further be used as a rheology modifier in aqueous systems by adding an effective amount thereof to an aqueous medium to effect a desired viscosity, rheology, or flow curve property.
1. A method of dewatering a waste sludge comprising:
adding an effective amount of a water-soluble interjacent complex to the waste sludge, the water-soluble interjacent complex comprising:
(a) a water-soluble polymer; and
(b) one or more water-soluble monomers polymerized to form a polymer in the presence of the polymer in (a), wherein the water-soluble interjacent complex forms a solution in water that is free of insoluble polymer particles and maintains one uniform phase after standing at ambient conditions for at least three months; and
dewatering the waste sludge;
wherein the water-soluble polymer is selected from the group consisting of water-soluble poly(meth)acrvlates, water-soluble polyamides, water-soluble polyesters, water-soluble polyurethanes, water-soluble poly(vinyl amine), water-soluble poly(ethylene imine), water-soluble amine/epihalohydrin polyamines, water-soluble poly(meth)acrylamide, water-soluble (meth)acrylamide copolymers, water-soluble poly(meth)acrylic acid, water-soluble copolymers of (meth)acrylic acid, poly(diallyl dimethyl ammonium halides), copolymers of diallyl dimethyl ammonium halides, water-soluble vinyl pyrrolidone, water-soluble copolymers of vinyl pyrrolidone, poly(meth)acrylamidopropyltrimethyl ammonium halides, copolymers of (meth)acrylamidopropyltrimethyl ammonium halides, poly(meth)acryloyloxyethyltrimethyl ammonium halides, copolymers of (meth)acryloyloxyethyltrimethyl ammonium halides, poly(meth)acryloyloxyethyltrimethyl ammonium methyl sulfate, copolymers of (meth)acryloyloxyethyltrimethyl ammonium methyl sulfate, xanthan gums, sodium alginates, galactomanans, carageenan, gum arabic, hydroxyethyl cellulose, hydroxypropyl cellulose, diallyl dimethyl ammonium chloride graft copolymers of hydroxyethylcellulose, polymeric quaternary ammonium salts of hydroxyethyl celluloses reacted with a trimethyl ammonium substituted epoxide, polymeric quaternary ammonium salts of hydroxyethyl celluloses reacted with lauryl dimethyl ammonium substituted epoxides, a quaternary ammonium derivative of hydroxypropyl guar and combinations thereof.
2. The method of claim 1 , wherein the water-soluble interjacent complex further includes one or more inorganic coagulants selected from the group consisting of aluminum sulfate, aluminum chloride, ferric chloride, ferric sulfate, calcium oxide, magnesium oxide, polyaluminum chloride and aluminum chlorohydrate.
3. The method of claim 1 , wherein the water-soluble polymer in (a) is one or more selected from the group consisting of water-soluble poly(meth)acrylates, water-soluble polyamides, water-soluble polyesters, water-soluble polyurethanes, water-soluble poly(vinyl alcohol), water-soluble poly(vinyl amine), water-soluble poly(ethylene imine), water-soluble amine/epihalohydrin polyamines, water-soluble poly(meth)acrylamide, water-soluble (meth)acrylamide copolymers, water-soluble poly(meth)acrylic acid, water-soluble copolymers of (meth)acrylic acid, poly(diallyl dimethyl ammonium halides), copolymers of diallyl dimethyl ammonium halides, water-soluble vinyl pyrrolidone, water-soluble copolymers of vinyl pyrrolidone, poly(meth)acrylamidopropyltrimethyl ammonium halides, copolymers of (meth)acrylamidopropyltrimethyl ammonium halides, poly(meth)acryloyloxyethyltrimethyl ammonium halides, copolymers of (meth)acryloyloxyethyltrimethyl ammonium halides, poly(meth)acryloyloxyethyltrimethyl ammonium methyl sulfate, copolymers of (meth)acryloyloxyethyltrimethyl ammonium methyl sulfate, hydroxyethyl cellulose, hydroxypropyl cellulose, diallyl dimethyl ammonium chloride graft copolymers of hydroxyethylcellulose, polymeric quaternary ammonium salts of hydroxyethylcelluloses reacted with a trimethyl ammonium substituted epoxide, polymeric quaternary ammonium salts of hydroxyethyl celluloses reacted with lauryl dimethyl ammonium substituted epoxides, and quaternary ammonium derivative of hydroxypropyl guar.
4. The method of claim 1 , wherein the monomers in (b) comprise a monomer mix comprised of (i) 0 to 100 mol % of one or more cationic monomers; (ii) 0 to 100 mol % of one or more anionic monomers, and (iii) 0 to 100 mol % of one or more nonionic monomers.
5. The method of claim 4 , wherein the anionic monomer (ii) comprises one or more acid functional monomers selected from the group consisting of 2-acrylamido-2-methylpropane sulfonic acid, 2-methacrylamido-2-methylpropane sulfonic acid, sulfonated styrene, vinyl sulfonic acids, allyl ether sulfonic acids, (meth)acrylic acid, maleic acid, itaconic acid, N-(meth)acrylamidopropyl, N,N-dimethyl,amino acetic acid, N-(meth)acryloyloxyethyl, N,N-dimethyl,amino acetic acid, N-(meth)acryloyloxyethyl, N,N-dimethyl,amino acetic acid, crotonic acid, (meth)acrylamidoglycolic acid, and 2-(meth)acrylamido-2-methylbutanoic acid.
6. The method of claim 4 , wherein the cationic monomer (i) comprises one or more carboxylic acid containing monomers selected from the group consisting of (meth)acrylamidopropyltrimethyl ammonium halides, (meth)acryloyloxyethyltrimethyl ammonium halides, poly(meth)acryloyloxyethyltrimethyl ammonium methyl sulfate, and diallyl dimethyl ammonium halides.
7. The method of claim 4 , wherein the nonionic monomer (iii) comprises one or more selected from the group consisting of C 1 -C 22 straight or branched chain alkyl or aryl (meth)acrylates, C 1 -C 22 straight or branched chain N-alkyl or aryl(meth)acrylamide, (meth)acrylamide, N-methyl(meth)acrylamide, N-vinylpyrrolidone, vinyl acetate, ethoxylated (meth)acrylates, propoxylated(meth)acrylates, hydroxy functional (meth)acrylates, N,N-dimethyl (meth)acrylamide, styrene, C 1 -C 22 straight or branched chain alkyl allyl ethers, and C 1 -C 22 aryl allyl ethers.
8. The method of claim 4 , wherein the monomer mix in (b) further comprises (iv) a branching quantity of one or more monomers that have two or more sites of reactive unsaturation.
9. The method of claim 1 , wherein the reduced viscosity of the interjacent complex, as determined in a Ubbelhhde Capillary Viscometer at 0.05% by weight concentration of polymer in 1M NaCl solution, at 30° C., pH 7 ranges from 0.1 to 20 dl/g.
10. The method of claim 1 , wherein the water-soluble polymer in (a) is one or more organic coagulant polymers selected from the group consisting of amine/epihalohydrin polyamines, poly(diallyldimethyl ammonium halides), poly(ethylene imines), poly(meth)acryloyloxyethyltrimethyl ammonium halides and poly(meth)acryloyloxyethyltrimethyl ammonium methyl sulfate; and the polymer in (b) is derived from polymerizing (meth)acrylamide and one or more monomers to provide a (meth)acrylamide copolymer.
11. The method of claim 10 , wherein the (meth)acrylamide copolymer in (b) is anionic, nonionic, or cationic.
12. The method of claim 1 , further comprising feeding the mixture of waste sludge and interjacent complex to a filter press or a belt press.
13. The method of claim 1 , wherein the waste sludge is selected from the group consisting of primary municipal sludge, secondary municipal sludge, thermophilic digested sludge, raw sewage sludge, oily waste sludges, sludges of dispersed solids, industrial waste sludges, sludges generated from paper mills, and laundry waste sludges.
14. The method of claim 1 , wherein the water-soluble interjacent complex comprises
copolymers of (meth)acrylic acid, poly(diallyl dimethyl ammonium halides), copolymers of diallyl dimethyl ammonium halides, water-soluble vinyl pyrrolidone, water-soluble copolymers dimethyl ammonium substituted epoxides, a quaternary ammonium derivative of hydroxypropyl
in (b) a monomer mixture comprising (i) 0 to 100 mol % of one or more cationic monomers; (ii) 0 to 100 mol % of one or more anionic monomers, and (iii) 0 to 100 mol % of one or more nonionic monomers.
15. The method of claim 14 , wherein the anionic monomer (ii) comprises one or more acid functional monomers selected from the group consisting of 2-acrylamido-2-methylpropane sulfonic acid, 2-methacrylamido-2-methylpropane sulfonic acid, sulfonated styrene, vinyl sulfonic acids, allyl ether sulfonic acids, (meth)acrylic acid, maleic acid, itaconic acid, N-(meth)acrylamidopropyl, N,N-dimethyl,amino acetic acid, N-(meth)acryloyloxyethyl, N,N-dimethyl,amino acetic acid, N-(meth)acryloyloxyethyl, N,N-dimethyl,amino acetic acid, crotonic acid, (meth)acrylamidoglycolic acid, and 2-(meth)acrylamido-2-methylbutanoic acid.
16. The method of claim 14 , wherein the cationic monomer (i) comprises one or more cationic monomers selected from the group consisting of (meth)acrylamidopropyltrimethyl ammonium halides, (meth)acryloyloxyethyltrimethyl ammonium halides, poly(meth)acryloyloxyethyltrimethyl ammonium methyl sulfate, and diallyl dimethyl ammonium halides.
17. The method of claim 14 , wherein the nonionic monomer (iii) comprises one or more monomers selected from the group consisting of C 1 -C 22 straight or branched chain alkyl or aryl (meth)acrylates, C 1 -C 22 straight orbranched chain N-alkyl or aryl (meth)acrylamide, (meth)acrylamide, N-methyl(meth)acrylamide, N-vinylpyrrolidone, vinyl acetate, ethoxylated (meth)acrylates, propoxylated (meth)acrylates, hydroxy functional (meth)acrylates, N,N-dimethyl(meth)acrylamide, styrene, C 1 -C 22 straight or branched chain alkyl allyl ethers, and C 1 -C 22 aryl allyl ethers.
18. The method of claim 1 , wherein the water-soluble polymer in (a) is one or polymers selected from the group consisting of poly(diallyldimethyl ammonium halides), poly(meth)acryloyloxyethyltrimethyl ammonium halides and poly(meth)acryloyloxyethyltrimethyl ammonium methyl sulfate; and the polymer in (b) is derived from polymerizing a monomer mixture comprising (meth)acrylamide and one or more cationic monomers selected from the group consisting of (meth)acrylamidopropyltrimethyl ammonium halides, (meth)acryloyloxyethyltrimethyl ammonium halides, poly(meth)acryloyloxyethyltrimethyl ammonium methyl sulfate, and diallyl dimethyl ammonium halides.