Calgon Corporation

Shih-ruey Thomas Chen

Raymond J. Schaper

Gary F. Matz

Raymond J Schaper

Sim K Lim

Arnold Eugene Bloomquist

Shih-Ruey Tom Chen

Gary F Matz

Leonard J Persinski

Jerry E Boothe

Beverly Bendiksen

Polyether polyamino methylene phosphonate N-oxides possess high calcium tolerance and have been found to give excellent inhibition of the formation, deposition and adherence of scale-forming salts, especially calcium carbonate, under severe conditions which include elevated pH, high dissolved solids content, and high saturation levels of calcium carbonate.

Polyether polyamino methylene phosphonate N-oxides for high pH scale

Polyether polyamino methylene phosphonate n-oxides for high pH scale

N,N-bis(phosphonomethyl)-2-amino-1-propanol, derivatives and corresponding lower alkyl ethers and N-oxides thereof possess high calcium tolerance and have been found to give excellent inhibition of the formation, deposition and adherence of scale-forming salts, especially calcium carbonate, under severe conditions which include elevated pH, high dissolved solids content, and high saturation levels of calcium carbonate.

N,N-bis(phosphonomethyl)-2-amino-1-propanol, derivatives and

Multifunctional scale inhibitor compositions, alone or together with polymeric structures, are described which are characterized by having, in addition to a phosphonomethylamino group, a sulfonic acid and/or carboxylic acid group. By incorporating several types of functional groups into a single molecule, control of scale formation and deposition under more severe conditions than normally encountered can be attained.

Multifunctional scale inhibitors

The present invention is directed to a method of inhibiting corrosion and the precipitation of scale-forming salts in an aqueous system, comprising adding to the system at least 0.1 mg/l of a polymer having an intrinsic viscosity of 0.05 to 4.5 dl/g, in 1.0 M NaCl, prepared from:

Acrylic acid/2-acrylamido-2-methylpropylsulfonic

The instant invention is directed to a process for the production of high molecular weight water-in-oil polymer emulsions of cationic polymers.

Cationic water-in-oil polymer emulsions

Novel functional ionene polymer compositions useful in a wide variety of applications, including, among others, as wet and dry strength additives, corrosion inhibitors, and electroconductive coatings.

Functional ionene compositions and their use

Self-inverting emulsion polymers and their use as drainage aids, retention aids, saveall flotation aids and process water flocculants. The polymers are copolymers and homopolymers based on acrylamide, polymerized in the presence of water, an inert hydrophobic liquid, free radical catalyst and an emulsifier having a HLB of at least 7.

Stable, self-inverting water-in-oil emulsions

Self-inverting emulsion polymers and their use as drainage aids, retention aids, saveall flotation aids and process water flocculants.

Self-inverting emulsions of dialkyldiallyl ammonium chloride polymers

Novel functional ionene polymer compositions have been prepared which have been found to be useful in a wide variety of applications, including, among others, as wet and dry strength additives, corrosion inhibitors, and electroconductive coatings, and which comprise recurring units of the formula: ##STR1##

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Pittsburgh, PA, United States of America

Raymond J Schaper