Nalco Chemical Company

Ondeo Nalco Company

Nalco Australia Pty. Ltd.

James Morton Tippett

John T Malito

Radhakrishnan Selvarajan

Graeme J Farquharson

Scott Barham

Michael Groesz

Graeme John Farquarson

The claimed invention is a method for separating Bayer process red mud from a Bayer process liquor which comprises adding to a Bayer process liquor containing red mud an effective amount of a water soluble synthetic flocculant, dextran and starch combination. The flocculant is added anywhere in the slurry containing the red mud suspended in Bayer process liquor, or in a liquor slurry containing bauxite prior to or during digestion. Once the flocculant combination is added, it is mixed sequentially with the Bayer process liquor and the red mud contained in the Bayer process liquor is removed by sedimentation, centrifugation or filtration.

Dextran starch and flocculant combination for improving red mud clarification

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

Dilute solutions of diallydimethyl ammonium chloride polymers are effective as dust suppressants for finely divided mineral and coal particles.

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Oatley, Australia

James Morton Tippett