Nalco Chemical Company

Gerard R Rose

Dodd W Fong

John R Hurlock

Ralph W Kaesler

Carbon absorbents are used to remove color bodies from paper mill waste waters. A preferred embodiment of the process utilizes pretreatment of the paper mill waste waters with cationic flocculants.

Pulp mill waste color removal with carbon absorbents

A method of dewatering BOF scrubbing liquid sludges which contain large amounts of finely divided iron oxides which comprises treating these sludges with a dewatering amount of an acrylamide acrylic acid, N-substituted lower alkyl acrylamide sulfonate terpolymer which contains from 35-80 mole percent of acrylamide, from 10-60 mole percent of acrylic acid and from 1-30 mole percent of the N-substituted lower alkyl acrylamide sulfonate which terpolymer has a reduced specific viscosity (RSV) of at least 25.

Anionic flocculant for dewatering steel mill sludges

A method of clarifying waters having an alkalinity of at least 100 ppm, calculated as CaCO.sub.3, which comprises:

Growing community of inventors

Park Ridge, IL, United States of America

Gerard R Rose