Nalco Chemical Company

Nalco Company

Paul J Harris

Kenneth G Phillips

Robert P Mahoney

Manian Ramesh

Jeffrey R Cramm

John T Malito

Michael G Strominger

Cheng-Sung Huang

Mayur Patel

Robert W Reese, Jr

The present invention provides an inverse emulsion polymer having a dispersed phase composed of an aqueous solution of an acrylic polymer and a continuous phase composed of an ester of a fatty acid and a water-soluble alcohol. The present invention further includes a method of water treatment which includes adding the inverse emulsion polymer to an industrial water system and hydrolyzing the ester of a fatty acid and a water-soluble alcohol into a fatty acid salt. The inverse emulsion polymer may be used as a flocculant to clarify industrial water systems at elevated temperature and/or elevated pressure and high pH.

Inverse emulsion polymer and method of use thereof

A continuous free radical polymerization process for the preparation of water-soluble copolymers from water-soluble monomers for further processing to dry polymers is disclosed. The process allows efficient polymerization of the monomers in aqueous solution in the presence of a free radical catalyst through backmixing. Water-soluble polymers with molecular weights of from about 3,000-30,000,000 and preferably from about 500,000-10,000,000 are obtained utilizing this process.

Horizontally flowing continuous free radical polymerization process for

The invention comprises a process for improved flocculation of Bayer process red mud-containing slurry. The improvement comprises adding to the red mud-containing liquor a hydroxymethyl diphosphonic acid polymer optionally in addition to the conventional flocculant. The polymer is added to the red mud-containing liquor in an amount sufficient to reduce the concentration of suspended solids in the supernatant phase and/or increase the rate of sedimentation.

Hydroxymethyl diphosphonated polyacrylates for red mud treatment

An improved process for synthesizing high molecular weight polyamines utilizing a self-limiting neutralizing agent to maintain a generally constant alkaline ph over the course of the synthesis reaction, and the improved high molecular weight polyamines produced thereby.

Method of preparing high molecular weight polyamines

An improved process for synthesizing high molecular weight polyamines utilizing a self-limiting neutralizing agent to maintain a generally constant alkaline pH over the course of the synthesis reaction, and the improved high molecular weight polyamines produced thereby.

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Orland Park, IL, United States of America

Paul J Harris