Nalco Chemical Company

Nalco Company

Kaiser Aluminum Chemical Corporation

Ecolab USA Inc.

Ondeo Nalco Company

John T Malito

Robert P Mahoney

Manian Ramesh

John David Kildea

Everett C Phillips

Larry E Brammer, Jr

Murat Quadir

Michael G Strominger

Radhakrishnan Selvarajan

James A Counter

James Morton Tippett

William J Roe

Paul J Harris

Graeme J Farquharson

Morris L Roberson

John M Ferrara

Curtis M Layman

Graeme John Farquarson

Gordon C Rogers, Jr

Scott F Ross

Richard D Wintermute

Disclosed herein are compounds, compositions, and methods for producing aluminum hydroxide crystals from a precipitation liquor. The precipitation liquor may be located in a Bayer process.

Crystallization aids for bayer aluminum hydroxide

A high molecular weight, water-soluble polymer comprising pendant salicylic acid groups and having a weight average molecular weight of at least about 2,000,000 daltons and use of the polymer for clarifying red mud-containing liquors generated in the Bayer process for the recovery of alumina from bauxite.

High molecular weight polymers containing pendant salicylic acid groups for clarifying bayer process liquors

An improved method and composition for producing aluminum hydroxide crystals in a Bayer process pregnant liquor, involve the addition of a crystallization modifier comprising a C-Cfatty acid, precursors, salts or blends thereof. The alkyl chain of the fatty acid crystallization modifier is free of functional groups. The modifier yields a commercially in the presence and absence of an hydrocarbon oil which dissolves the fatty acid.

Composition and method for improved aluminum hydroxide production

The present invention provides an inverse emulsion polymer having a dispersed phase composed of an aqueous solution of an acrylic polymer and a continuous phase composed of an ester of a fatty acid and a water-soluble alcohol. The present invention further includes a method of water treatment which includes adding the inverse emulsion polymer to an industrial water system and hydrolyzing the ester of a fatty acid and a water-soluble alcohol into a fatty acid salt. The inverse emulsion polymer may be used as a flocculant to clarify industrial water systems at elevated temperature and/or elevated pressure and high pH.

Inverse emulsion polymer and method of use thereof

High molecular weight polymers containing pendant salicylic acid groups for clarifying Bayer process liquors

A composition of matter which is aluminum hydroxide, produced using the Bayer Process, wherein the aluminum hydroxide produced has a Total Organic Carbon of less than about 0.5 milligrams Total Organic Carbon/gram aluminum hydroxide.

Aluminum hydroxide, made via the bayer process, with low organic carbon

A method of flocculating suspended solids in a Bayer process liquor comprising adding to the liquor an effective amount of a polymer comprising salicylic acid groups.

Method of clarifying bayer process liquors using salicylic acid containing polymers

The present invention provides both reagents and a process for removing heavy metals from a caustic fluid stream by the addition of reagents which are not corrosive or deleterious. Specifically, the present invention is directed to removing heavy metals from a Bayer liquor in an aluminum processing plant. The reagents, dithiocarbamate and dithocarbonate groups, are added individually or in combination thereof to the Bayer liquor for the removal of heavy metals, such as zinc. The reagents form a complex with the heavy metal for the precipitation of the metal from the fluid stream. Once a complex is formed, the Bayer liquor is held in a quiescent state for a period of time sufficient for settling out of solution the precipitate. After settling out of solution, the precipitate is separated and removed and the Bayer liquor is then further processed into alumina.

Process for removing heavy metals from a caustic fluid stream

A method of separating solids and preventing foaming in an industrial water system comprising adding to fluids in the industrial water system an effective amount of a low foaming latex polymer prepared using a tallow amine ethoxylate/polyoxyethylene oleyl ether emulsifier.

Fatty acid free latex polymer flocculants

A method for flocculation of red mud in Bayer Process streams utilizing a fatty acid or fatty acid ester free latex polymer flocculant. Preferred fatty acid free emulsifiers useful for the preparation of such flocculants are obtained by reacting ethylene and/or propylene oxide with a reagent selected from the group consisting of ethylene diamine, ethanol and ethylene glycol.

Method of removing insoluble materials from bayer process with fatty

A process for improving the flocculation of suspended solids in a Bayer process liquor in a primary settler stage. The method includes the step of adding to a primary settler feed from about 1 to about 100 parts per million of a composition including a non-inverted, water-continuous polymer, said polymer being hydrolyzable in a Bayer process liquor to an acid form, said acid form being an active red mud flocculant.

Red mud flocculation

Bayer process liquors derived from the digestion of bauxites with a caustic solution are purified by removing the organic impurities present in the liquors. Removal of these impurities is accomplished by treating the liquor containing dispersed solids with a high viscosity polymer which includes diallyl dimethyl ammonium monomers.

Purification of Bayer process liquors using cationic polymeric

A method for reducing the relative viscosity of a phosphate rock slurry during a grinding process in a phosphoric acid production facility is described. The method includes the steps of adding an effective amount of a sulfonated acrylamide or acrylic acid polymer having a molecular weight of from 500 to 100,000 and being selected from the group consisting of sulfonated polymers of acrylic acid/acrylamide copolymers and the copolymerization products of acrylic acid, acrylamide and 2-acrylamido-2-methylpropyl sulfonic acid.

Chemical aids for wet-grinding phosphate rock

Metal working lubricant compositions are provided in which a dry film of a lubricant is formed on the metal being worked. The lubricant comprises an ester having a melting point of at least 100.degree. F. and a solid surfactant having an HLB number in the range of about 7-12. The surfactant is solid at room temperature and will cause the lubricant to disperse in water at a temperature exceeding the lubricant's melting point. Consequently, the solid surfactant incorporated in the dry film lubricant allows lubricant removal by washing of the metal with just hot water. The invention also provides for metal working methods in which the lubricants are used.

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Oswego, IL, United States of America

John T Malito