Nalco Chemical Company

Buckman Laboratories, Inc.

Wood E Hunter

Theodore P Sieder

Kenneth G Phillips

John D Pera

Edward G Ballweber

John D Buckman

Barney Vallino, Jr

Robert M Taylor

Karl H Hoffman

This invention is related to liquid polymer compositions and to methods of preparing these compositions which comprise a high molecular weight water-soluble vinyl addition polymer, water, one or more surfactants, and a water-soluble polyalkylene glycol, or water-soluble ethoxylated alcohol, alkylphenol or fatty acid.

Water-soluble dispersions of high molecular water-soluble polymers

A method of reducing friction loss in oil well fracturing through the addition of small amounts of copolymers of acrylamide and quaternary salts of dimethylaminoethyl methacrylate and dimethylaminopropyl methacrylamide.

Method for reducing friction loss in a well fracturing process

Water-soluble polymers of diallyl dimethyl ammonium chloride can be prepared from monomer solution containing a large amount of an alkali metal halide salt. Additionally, a method is disclosed for making high quality monomer which involves purification of allyl chloride which is used to prepare the starting monomeric material, optimum temperature control during caustic addition, and partial distillation to remove harmful impurities.

Preparation of diallyl dimethyl ammonium chloride and polydiallyl

Cationically modified polymers of acrylamide are prepared by adding to a polyacrylamide an aqueous solution of a lower aliphatic aldehyde followed by a lower alkyl secondary amine. The pH of the dilute solution of the acrylamide polymer which is reacted is adjusted prior to addition of the aldehyde to between 4.5 and 5.5 thereby conducting this reaction at an acidic pH. Additionally, quaternized polymers may be prepared by adding to the cationically modified polyacrylamide a lower alkyl halide quaternizing agent. The pH of the solution of the cationically modified acrylamide polymer prior to quaternization should be 7.5-8.5.

Preparation of a manniched polyacrylamide quarternaries thereof

Poor quality acrylamide can be used to produce good quality water-soluble polymers by conducting the polymerization in the presence of urea.

Urea as an additive to improve the viscosity and activity of

A method for the concentration of water-in-oil emulsions of water soluble vinyl addition polymers is disclosed. The process involves distilling the water-in-oil emulsion of the water soluble vinyl addition polymer under a vacuum while maintaining the water-oil phase ratio substantially equal to the starting latex. Maintaining this ratio allows latices of this type to be concentrated to as high as 70% by weight polymer.

Method for the concentration of water-in-oil emulsions of water soluble

An improved technique for making a Raney copper catalyst by contacting particulate copper/aluminum alloy particles with an aqueous solution containing dissolved therein both alkali metal hydroxide and at least one polyfunctional oxygen-containing aromatic compound. The catalyst so prepared is used in the catalystic hydrolysis of acrylonitrile to acrylamide.

Growing community of inventors

Lombard, IL, United States of America

Wood E Hunter