Nalco Chemical Company

Ondeo Nalco Company

John W Sparapany

Dodd W Fong

Cathy C Johnson

Kristine S Siefert

Manian Ramesh

James F Kneller

John H Collins

Chandrashekar S Shetty

Martha R Finck

Angela P Zagala

Mary A Kinsella

Richard P Cardile

Anthony G Sommese

John R Hurlock

Bhupati R Bhattacharyya

Kristine S Salmen

Pek L Choo

Andrew J Dunham

Yvonne O Dunn

Bhupati R Bhattacharyya, Deceased

Dennis P Bakalik

Josepha M Fu

Livio Mattucci

Elise Maury

Massimo Borelli

Foster Michael H

Fernando Urbani

This invention is directed to a method of improving retention and drainage performance in a papermaking process comprising adding to the furnish an effective amount of a low molecular weight water-soluble cationic dispersion polymer prepared by polymerizing one or more cationic monomers and one or more nonionic monomers and one or more chain transfer agents under free radical forming conditions in an aqueous solution of an anionic salt in the presence of a stabilizer polymer, wherein the cationic dispersion has a cationic charge of from about 10 mole percent to about 80 mole percent and an RSV of from about 0.2 dl/g to about 6 dl/g.

Method of improving retention and drainage in a papermaking process using low molecular weight cationic dispersion polymers

Method for dewatering of sludge

This invention is directed to a method of clarifying water comprising adding to the water an effective clarifying amount of a low molecular weight water-soluble cationic dispersion polymer prepared by polymerizing one or more cationic monomers and one or more nonionic monomers and one or more chain transfer agents under free radical forming conditions in an aqueous solution of an anionic salt in the presence of a stabilizer polymer, wherein the cationic dispersion has a cationic charge of from about 1.0 mole percent to about 75 mole percent and an RSV of from about 0.2 dl/g to about 6 dl/g.

Method of clarifying water using low molecular weight cationic dispersion polymers

The invention provides novel cationic flocculant dispersion polymers that can be utilized in the methods disclosed herein. This invention also provides methods for detecting cationic flocculants wherein said flocculants may be made via a dispersion process, a latex process or a dry polymer process. The flocculants are used to flocculate solids from liquid components of an industrial food process. The detection method involves the use of monoclonal antibodies to determine the presence or concentration of the cationic flocculants in the liquids.

Detectable cationic flocculant and method of using same in industrial food processes

Hydrophilic cationic copolymers of acrylamide are prepared as dispersions in a salt media. These polymers have high molecular weights and are readily soluble by diluting in water. These polymers are useful flocculants for such applications as sludge dewatering, raw water clarification aids, emulsion breakers and waste water clarification aids.

Hydrophilic dispersion polymers for treating wastewater

A method is provided for removing metals from a fluid stream containing these metals. The method involves treating the fluid stream with a water soluble ethylene dichloride ammonia polymer having a molecular weight of from 500 to 100,000 that contains at least 5 mole percent of dithiocarbamate salt groups to form a complex with the metals. Then, the fluid stream is passed through a filtering device to remove the complexes from the fluid stream.

Method for removing metals from a fluid stream

A hydrophobic polyelectrolyte copolymer which is useful in the removal of color in paper mill waste water. The copolymer preferably comprises diallyldimethylammonium chloride and a hydrophobic monomer selected from the group consisting of quaternized dimethylaminoethylacrylates and quaternized dimethylaminoethylmethacrylates.

Hydrophobic polyelectrolytes used in removing color

The invention describes novel amino(lower alkyl)phosphinic acid compounds and their use to modify acrylamide polymers, acrylic acid polymers and acrylamide-acrylic acid co-polymers which produces polymers containing amidoalkylphosphinic acid groups.

Aminoalkylphosphinates and phosphinic acid-containing polymers therefrom

A water soluble ethylene dichloride ammonia polymer having a molecular weight of from 500 to 10,000 which contains from 5 to 50 mole % of dithiocarbamate salt groups. Also, disclosed is the use of these polymers in removing heavy metals from water.

Dithiocarbamate polymers

The invention describes acrylamide, acrylic acid, polymers and co-polymers containing phosphinate groups to inhibit scale and corrosion caused by metal surfaces contacting industrial waters.

Phosphinic acid-containing polymers and their use in preventing scale

Water-in-oil emulsion polymers of cationic acrylamides to which are added small quantities of chain transfer agents. These polymers are useful as flocculants in sludge dewatering processes.

Cationic polymers for sludge dewatering

Water-in-oil emulsion polymers of cationic acrylamides to which are added small quantities of a hydroxyalkyl methacrylate and sodium formate. These polymers are useful as flocculants in sludge dewatering processes.

A substantially water-insoluble, slightly cross-linked, partially neutralized, hydrogen-forming polymer composition consisting essentially of

Superabsorbent polymers

Polyacrylic acid polymers are modified with hydroxylamine to convert a portion of the acrylic acid groups in the polymer to hydroxamic acid groups. The process requires utiization of a pH between 1-6 and a temperature ranging between 70.degree.-150.degree. C.

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Bolingbrook, IL, United States of America

John W Sparapany