Nalco Chemical Company

David O Owen

Lawrence J Connelly

David C Davis

Kevin L O'Brien

Jacqueline J Bonin

Kent E Molter

A binder composition and method for its use to bind metal ores in a pelletizing process is disclosed. The composition includes the use of superabsorbent cross-linked polymers alone or in combination with at least one of the materials chosen from linear water-soluble vinyl addition polymers and polysaccharides.

Method of forming ore pellets with superabsorbent polymer

A method of preventing and inhibiting scale on solid surfaces in contact with mineral processing waters which comprises treating such waters with a scale preventing or inhibiting amount of a composition comprising:

Mixed polymers for preventing scale caused by mineral processing water

A process for thickening gold ore slurries or slimes for gold purification which comprises adding to such gold ore slimes an effective amount of flocculant comprising a terpolymer containing 5-35 mole % 2-AMPS, 5-45 mole % sodium acrylate and 50-90 mole % acrylamide, said terpolymer having an RSV of at least 20.

Thickening of gold process slurries

A method and composition for producing a more coarse alumina trihydrate crystal in a Bayer process pregnant liquor, involving the addition of approximately 5-400 mg/l of surfactant-oil, the oil dissolving the surfactant which can be selected from a host of surfactants which are stable in (hot) caustic solutions and capable of dispersing hydrophobic liquids in the Bayer liquor. The preferred embodiment involves the use of tall-oil fatty acids; a number of equivalent surfactants are established. The oil or hydrocarbon (hydrophobic) liquid can be selected from paraffinic oils, naphthenic oils, mineral seal oils, fuel oils, and bottoms or residue from a C.sub.10 alcohol distillation.

Use of surfactants in alumina precipitation in the bayer process

The following inorganic compounds of iron, when added to Bayer process liquors, form a precipitate of the finely divided iron present in:

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Aurora, IL, United States of America

David O Owen