Nalco Chemical Company

Nalco Company

Ecolab USA Inc.

Peter A Dimas

Daniel N T Hay

Kenneth M McGough

Everett C Phillips

Anthony E Gross

Wesley Lamar Whipple

Michael G Strominger

Kenneth M Mcgough

The invention is directed towards methods and compositions for preventing dusting problems in mineral supplement. The method involves treating the mineral supplement or a dust releasing material with a composition comprising polymerized organic acid.

Composition for dust control

The present disclosure is directed to a method of improving the transfer of slurry in a Bayer process through the addition of one or more chemical species to a Bayer process, wherein said chemical species is selected from the group consisting of: non-ionic surfactants, polyglycols, polyglycol ethers, anionic surfactants, anionic polymers, and a combination thereof. The present invention is also directed to a method of deaerating a slurry in a Bayer process through the addition of an effective amount of one or more chemical species to a Bayer process, wherein said chemical species is selected from the group consisting of: non-ionic surfactants, polyglycols, polyglycol ethers, anionic surfactants, anionic polymers, and a combination thereof.

Transfer of slurry in a bayer process

A method of enhancing the recovery of useful coal or potassium chloride from screenbowl centrifuge separation operations comprising adding to the screenbowl centrifuge, from about 0.005 lbs active polymer/ton dry solids in centrifuge to about 0.70 lbs active polymer/ton dry solids in centrifuge, of an anionic copolymer, wherein said anionic copolymer is selected from the group comprising copolymers of acrylamide and acrylic acid and the known salts thereof.

Use of anionic copolymers for enhanced recovery of useful coal and potassium chloride from screen bowl centrifuge

A method of enhancing the recovery of useful coal or potassium chloride or borax from screenbowl centrifuge separation operations comprising adding to the screenbowl centrifuge, from about 0.03 lbs active polymer/ton dry solids in centrifuge to about 0.70 lbs active polymer/ton dry solids in centrifuge, of a cationic terpolymer, wherein said cationic terpolymer is prepared by polymerizing from about 1 to about 99.1 mole percent of one or more cationic monomers, from about 0.1 to about 10 mole percent of one or more hydroxyalkyl(meth)acrylates and from one to about 98.1 mole percent of one or more nonionic monomers.

Enhanced recovery of useful coal, potassium chloride and borax from screen bowl centrifuge

Siliceous materials produced by thermally treating spent Bayer process liquors are obtained in modified form when produced in the presence of polymeric quaternary ammonium compounds, polyamine polymers, copolymers of acrylic acid and acrylamide, and polyacrylamides. These modified siliceous materials possess morphologies which confer upon them a reduced tendency to deposit on surfaces throughout the process.

Method for the alteration of siliceous materials from bayer process

A method for defoaming a Bayer process liquor, the method comprising the steps of adding to the Bayer process liquor an effective amount of an antifoam/defoamer composition comprising a polyether surfactant and a polyhydric alcohol fatty acid ester.

Antifoam/defoamer compositions for Bayer process

Siliceous materials produced by thermally treating Bayer process liquors are obtained in modified form when produced in the presence of ammonium, aromatic amine, and amine compounds, or compounds bearing ammonium, aromatic amine or amine moieties, such as N-propylamine, pyridine and tetramethylammonium hydroxide. These modified siliceous materials possess morphologies which confer upon them a reduced tendency to deposit on surfaces throughout the process.

Method for the alteration of siliceous materials from Bayer process

A method for defoaming a Bayer process liquor, the method comprising the steps of adding to the Bayer process liquor an effective amount of an antifoam/defoamer composition comprising a water-soluble polypropylene glycol having an average molecular weight of from about 200 to about 600 daltons.

Compositions and method for foam control and crystal modification in

Tall oily fatty acids when combined with certain non-ionic surfactants having an HLB number from 10-14 are superior dewatering agents for Bayer Process alumina trihydrate filter cakes.

Growing community of inventors

Wheaton, IL, United States of America

Peter A Dimas