Petrolite Corporation

Charles W Burkhardt

David J Poelker

Kevin J McCarthy

Dennis P Parazak

Steven P Holmes

Rainer Langwald

A method for suppressing the viscosity of a calcium exotoxin slurry is disclosed. The method comprises adding to the slurry a viscosity-suppressing amount of a copolymer of a vinyl-based monomer and 2-acrylamide-2-methylpropane sulfonic acid or its sodium salt. The copolymer has a weight average molecular weight of from about 1,000 to about 10,000. A slurry comprising calcium exotoxin and about 0.25 to about 2.5 percent by weight of such copolymer is also disclosed.

Method for suppressing the viscosity of bioinsecticide slurries and

The formation of mill scale contaminated with an appreciable amount of oily substances is prevented by spraying rolled steel with an aqueous stream under high pressure containing an effective amount of a surfactant.

Method for preventing the buildup of oily deposits on rolling mill scale

This invention relates to the use of polyamines and/or polyamine salts, preferably those having 20 or less amino groups, as demulsifiers. This invention is particularly useful in breaking emulsions formed in surfactant flooding of oil bearing subterranean formations.

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Fenton, MO, United States of America

Charles W Burkhardt