Nalco Chemical Company

Barbara E Fair

James F Kneller

John E Hoots

Donald A Johnson

Kenneth P Fivizzani

Vytas Narutis

James R MacDonald

Gianfranco F Mazzani

I Sergio Di Simone

A phosphinate containing composition which has as its major ingredient more than 32 mole percent of a phosphinicosuccinic acid oligomer having the probable structural formula: ##STR1## M is H, Na, K, NH.sub.4, or mixtures thereof; and m and n are either 0 or a small whole number with the proviso that either m or n is a small whole number and the sum of m plus n is greater than 2.

Oligomer containing phosphinate compositions and their method of

Calcium carbonate scale is controlled by treating calcium carbonate containing waters with a predominantly phosphinate containing composition where has as its major ingredient more than 32 mole percent of a phosphinicosuccinic acid oligomer having the probable structural formula . ##STR1## M is H, Na, K, NH.sub.4, or mixtures thereof; and m and n are either 0 or a small whole number with proviso that either m or n is a small whole number and the sum of m plus n is greater than 2.

Oligomer-containing phosphate scale inhibitors

The precipitate species of manganese in the presence of an oxidative condition in the waters of an aqueous system can be diminished by treating such waters with certain amide-containing polymer.

Stabilization of manganese in aqueous systems

The soluble manganese species can be maintained in aqueous systems in the presence of halogen species by treating the waters with certain water-soluble, nitrogen containing compositions.

Growing community of inventors

Downers Grove, IL, United States of America

Barbara E Fair