Cytec Technology Corporation

American Cyanamid Company

Roger E Neff

Roderick Glyn Ryles

Joseph Jacinto Pellon

Richard M Goodman

Arthur Maurice Schiller

Peter A Jarovitzky

Dan S Honig

Elieth W Harris

Unsheared, water-soluble, branched, high molecular weight, anionic, polymeric flocculants are produced by polymerizing ethylenically unsaturated anionic, and optionally non-ionic, monomers and a branching agent in the presence of a chain-transfer agent. They are useful as flocculating agents for releasing water from dispersions of suspended solids.

Process for making high performance anionic polymeric flocculating agents

Water-soluble, branched, high molecular weight, cationic and non-ionic polymeric flocculants capable of manifesting their full performance potential without shearing are produced by polymerizing ethylenically unsaturated cationic and non-ionic monomers and a branching agent in the presence of a chain-transfer agent. They are useful as flocculating agents for releasing water from dispersions of suspended solids.

High performance polymer flocculating agents nonionic polymers

Water-soluble, high molecular weight, polymeric, microparticles with a high degree of branching are disclosed. A microemulsion polymerization process for preparing the microparticles is also disclosed. The microparticles give excellent results in a number of solid-liquid separation processes.

Water-soluble, highly branched polymeric microparticles

Method of dewatering suspensions with unsheared anionic flocculants

High performance cationic polymer flocculating agents

High performance anionic polymeric flocculating agents

Method for treating suspended solids

Dispersions of finely divided high molecular weight polyacrylamide particles are formed and treated with a caustic material to hydrolyze the polymer without undesirable side chain reactions to form high molecular weight anionic acrylamide polymers. A preferred technique for forming these products comprises the formation of a stabilized water-in-oil emulsion of aqueous acrylamide monomer, polymerizing the monomer, reacting the polymer emulsion thus formed with a hydrolysis agent and inverting the resultant hydrolyzed polymers into solution. These materials are useful in a variety of industrial applications for removing particulates from effluent streams.

Methods of making and using high molecular weight acrylamide polymers

Water-soluble, branched, high molecular weight, cationic polymers are used in combination with low molecular weight, cationic polymers to provide the highly improved dewatering of suspended solids. Water-in-oil emulsions containing these cationic polymers in the aqueous phase are also described.

High performance dewatering aids

Water-soluble highly branched polymeric microparticles

Novel compositions comprising cationic polymeric microparticles are disclosed, along with a method for their production. The products are useful in flocculating a wide variety of dispersions of suspended solids.

Cross-linked cationic polyermic microparticles

Novel compositions comprising anionic and/or amphoteric organic polymeric microparticles are disclosed, along with a method for their production. The products are useful in flocculating a wide variety of dispersions of suspended solids and in paper-making.

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Stamford, CT, United States of America

Roger E Neff