Betz Laboratories, Inc.

The O. M. Scott & Sons Company

Lawrence S Wittenbrook

John E Quinn

Charles E Donegan

Ian D Morrison

Richard J Timmons

Joe C Steelhammer

Raymond D Fleming

A method for reducing the oxidation of sulfite to sulfate in a sulfite-containing aqueous medium is disclosed and comprises adding to the medium water-soluble polyethyleneamine having at least one secondary amine and two primary amines.

Polyethyleneamines as sulfite antioxidants

The present invention relates to the drainage or dewatering of ore concentrates and more particularly to an improved method for dewatering as by filtration, to produce solids which have a desirably low moisture content and which are readily and easily handled by conventional methods of materials handling. The method employs the use of linear or branched alkyl ethoxylated alcohols as dewatering aids.

Dewatering composition

Dewatering ore concentrates with branched alkyl ethoxylated alcohol

Benzenesulfonylureas of the formula: ##SPC1## Where R is methyl or ethyl, R.sub.1 is methyl or ethyl, and R.sub.2 is hydrogen, methyl, or ethyl and salts of those benzenesulfonylureas of formula I having the formula: ##SPC2## Where R, R.sub.1, and R.sub.2 are as aforesaid, and Z is an alkali metal, an alkaline earth metal, or ##EQU1## where R.sub.3, R.sub.4, and R.sub.5 are each hydrogen or a C.sub.1 -C.sub.4 alkyl; the use of compounds of formulas I and II; and compositions containing such compounds.

Herbicidal compositions containing para-substituted benzenesulfonylureas

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Doylestown, PA, United States of America

Lawrence S Wittenbrook