Ecolab USA Inc.

Nalco Company

Daniel N T Hay

Peter A Dimas

Ronald V Davis

Jianjun Liu

Kevin O'Brien

Michael G Strominger

Wayne L Moss

Randon Renzello

Thomas A Faigl

Improved sparge compositions for reverse froth flotation separation and uses thereof, and methods of reverse froth flotation are described. The sparge compositions comprise sulfonated polymeric modifiers which can act as dispersants and depressants, and the compositions are suitably used in the reverse froth flotation of particulate material containing ultrafine particles. For example, the compositions and methods can be used in the separation of iron oxide beneficiary from iron ores comprising silica, silicates, and the like.

Sulfonated modifiers for froth flotation

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 invention provides methods and compositions for blends of glycerin and polyvinyl acetate emulsions which effectively decrease the dust forming tendency of particulate materials such as mineral fertilizer(s). These blends also reduce the caking tendency of mineral fertilizer(s), helping to maintain a free flowing material. Formulations based on these components, possibly including other additives, may also be useful for dust control and/or anticaking on other particulate materials including fertilizers, ores, coal, grain, etc.

Composition for dust control and improved material handling

A method for minimizing the addition of water to a phosphoric acid production process is described. The method uses phosphoric acid to make down a flocculant that is added to the process in order to promote filtration or clarification of crude phosphoric acid. Preferably, the phosphoric acid is a crude, clarified phosphoric acid that is recycled from the phosphoric acid production process itself.

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Naperville, IL, United States of America

Daniel N T Hay