Calgon Corporation

Wood E Hunter

Gary P Craun

Ronald J Falcione

David L Elliott

Kevin W Frederick

Randy J Loeffler

Paul A Rey

Marie S Chan

Wallace B Ramsey

Lewis D Morse

Lee W Bush

Kenneth A Kun

William J Erlanson

The use of falling-film evaporation and a concentration means such as centrifugal separation to dehydrate and concentrate a water-in-oil polymer emulsion or suspension is disclosed. In a preferred embodiment, a water-in-oil polymer composition containing less than about 25% active polymer solids is dehydrated in falling-film evaporator to produce an evaporator concentrate containing less than about 5.0% water. The evaporator concentrate then flows to a separation device such as a centrifuge, wherein oil is removed to produce a composition that is substantially a polymer and emulsifying surfactant-in-oil composition containing in excess of about 60 weight % polymer solids. The centrifuge raffinate may optionally be treated in a second separation means to capture additional polymer solids, with optional recycle of the oil-rich raffinate. The concentrated polymer composition is preferably stabilized with a steric stabilizer to produce a free flowing liquid product.

Process for preparing novel high solids non-aqueous polymer compositions

A composition comprising aqueous cellulosic furnish, a high molecular weight cationic polymer, and a modified lignin wherein the ratio of the cationic polymer to the modified lignin is from about 10:1 to 1:10 on an active basis is disclosed. A process employing this composition for making paper or paperboard having improved drainage, retention and formation properties is also provided.

Cellulosic, modified lignin and cationic polymer composition and process

A composition comprising an aqueous cellulosic furnish, a high molecular weight cationic polymer, and an anionic polymer comprising a modified lignin wherein the ratio of the cationic polymer to the anionic polymer is from about 10:1 to 1:10 on an active basis is disclosed. A process employing this composition for making paper or paperboard having improved drainage, retention and formation properties is also provided.

A composition comprising an aqueous cellulosic furnish, a high molecular weight cationic polymer, and a modified lignin wherein the ratio of the cationic polymer to the modified lignin is from about 10:1 to 1:10 on an active basis is disclosed. A process employing this composition for making paper or paperboard having improved drainage, retention and formation properties is also provided.

Cellulosic modified lignin and cationic polymer composition and process

A method for clarifying phosphoric acid by flocculation or coagulation of solids wherein an effective amount of a carboxylic-type polymer having a portion of sulfonic functionality is used as the clarification aid. Preferred polymers are high molecular weight acrylic acid/acrylamido methylpropyl sulfonic acid-type polymers.

Method of clarifying phosphoric acid

A novel method of treating circulating water containing over-sprayed, water-borne paint, such as in a paint spray booth operation, comprises adjusting the alkalinity of the paint spray booth water to between about 20 and 600 ppm, on a calcium carbonate basis, by adding a designated alkalinity source thereto, adding a cationic potato starch to the water, contacting the over-sprayed, water-borne paint with the alkalinity-adjusted paint spray booth water after addition of the cationic potato starch, adding an effective amount of a polymer floccing agent to the paint spray booth water, and removing resulting sludge from the paint spray booth water.

Methods for removing solids from water-based paint systems

A method for improving gypsum slurry filtration in the production of wet process phosphoric acid wherein an effective amount of carboxylic-type polymer having a portion of sulfonic functionality is used as the filtration aid. Preferred polymers are high molecular weight polymers of acrylic acid and acrylamido methylpropyl sulfonic acid.

Method of improving gypsum slurry filtration in the production of

A method for clarifying phosphoric acid by flocculation or coagulation of solids wherein an effective amount of a polymer having a predominantly sulfonic functionality is used as the clarification aid. Preferred polymers are high molecular weight acrylamide/acrylamido methylpropyl sulfonic acid-type (AM/AMPSA) polymers which are predominantly AMPSA.

Method of clarifying phosphoric acid using high charge sulfonic-type

The instant invention is directed to a method for preparing free-flowing, water-soluble polymer gels comprising:

Method for producing free-flowing, water-soluble polymer gels

Method for producing free-flowing water-soluble polymer gels

The instant invention is directed to a process for the manufacture of poly(dimethyldiallyl ammonium chloride) comprising:

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Pittsburgh, PA, United States of America

Wood E Hunter