Nalco Chemical Company

Nalco/exxon Energy Chemicals,l.p.

Radhakrishnan Selvarajan

Edward G Ballweber

Everett C Phillips

John T Malito

James Morton Tippett

Kenneth G Phillips

John R Hurlock

Ananthasubramanian Sivakumar

Manuel Slovinsky

Lawrence J Connelly

Martin R Godfrey

Michael G Strominger

James A Counter

Robert A Marble

Graeme J Farquharson

Richard D Christie

Joseph C Alfano

Graeme John Farquarson

Mary C Uhing

Demulsification of a water-in-oil, especially a water-in-crude oil, emulsion is effected by contacting it with an aqueous composition having at least one oil-soluble demulsifier and at least one water-soluble surfactant. These aqueous formulations are advantageous over conventional organic formulations of demulsifiers, as the need for toxic and/or flammable/combustible organic solvents is eliminated.

Aqueous dispersion of an oil soluble demulsifier for breaking crude oil emulsions

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

The present invention is directed to improvements in the Bayer mining process, used for the recovery of alumina from bauxite ore. Water-continuous emulsion polymers are advantageously used to improve the clarification, filtration and scale control of red-mud containing liquors generated during the Bayer process. Preferred polymers are high molecular weight poly(methyl acrylate/acrylic acid), poly(methyl acrylate), poly(vinyl acetate/acrylic acid/methyl acrylate) and a combination of a high molecular weight poly(methyl acrylate/acrylic acid) with a lower molecular weight poly(methyl acrylate/acrylic acid).

Water continuous emulsion polymers for improving scale control in the

The present invention is directed to the clarification of red mud-containing liquors generated in the Bayer process for the recovery of alumina from bauxite ore with a combination of high molecular weight emulsion polymer and lower molecular weight emulsion polymers. The invention is also a method for the same purpose utilizing a methyl acrylate emulsion homopolymer.

Water continuous methyl acrylate emulsion polymer combinations and

A method 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 a composition including water-continuous polymer, said polymer being hydrolyzable in a Bayer process liquor to an acid form, said acid form being an active red mud flocculent. A novel emulsion, and a polymerization technique for obtaining high molecular weight emulsions are also disclosed.

Water continuous methyl acrylate emulsion polymers for improved

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

Aqueous dispersions of water soluble nonionic and anionically charged vinyl and allyl addition polymers can be obtained by polymerizing in the presence of an anionically charged water soluble polymer stabilizer in a saturated salt solution. Methods for the preparation of these polymers, and their compositions are disclosed.

Process for producing water soluble anionic dispersion polymers

A method for the determination of the concentration of additives in boiler water systems, by which polymeric additives are utilized to monitor and treat boiler water systems.

Monitoring boiler internal treatment with fluorescent-tagged polymers

A process for synthesizing high molecular weight anionic dispersion polymer is disclosed, the process comprising providing a mixture of water, acrylic acid and a stabilizer; cooling the mixture to a temperature of less than 35.degree. C.; lowering the pH of the mixture to less than 4.5; adding ethylhexyl acrylate to the mixture to form an aqueous solution; stirring the aqueous solution; purging the solution with nitrogen simultaneous with the step of stirring; heating the solution to about 48.degree. C.; adding initiator for from about 2 to about 3 hours; heating the solution to about 75.degree. C. for about 30 to about 60 minutes; and cooling and collecting the polymer.

Synthesis of high molecular weight anionic dispersion polymers

A beneficiation reagent is provided which is the half-ester reaction product of a short-chain dicarboxylic acid source, such as maleic anhydride, and a saturated, aliphatic, monohydric alcohol containing from eight to thirteen carbon atoms, preferably ten carbon atoms. This reagent is added neat to a water-slurry of iron ore concentrate in an amount of from about 0.1 to about 0.7 pounds/ton.

Flotation of apatite from magnatite

Acrylic acid copolymers and certain acrylic acid acrylamide terpolymers which contain amounts of 2-AMPS provide superior results when used to remove suspended red mud from aqueous solutions which contain alumina.

Flocculants for bauxite (red mud)

Water-soluble aniline-formaldehyde-polyamine polymers provide excellent flocculants for low turbidity waters.

Cationic polymers suitable for reducing turbidity in low turbidity waters

1-aminoalkane--1, 1-diphosphonic acids of the formula, ##STR1## may be produced in good yield by reacting a nitrile of the formula,

Production of 1-aminoalkane-1, 1-diphosphonic acids using phosphorous

A process for the production of water-soluble polyamine polymers by condensation reaction from ethylene dichloride and ammonia under pressure of 4-10 atmospheres which is conducted in two stages:

Growing community of inventors

Downers Grove, IL, United States of America

Radhakrishnan Selvarajan