Phillips Petroleum Company

Versitech, Inc.

Nalco Company

Mbx Systems, Inc.

Michael G Greene

Tom L Young

Sharon K Young

Kelly L Karlage

Sean P Premeau

Kathy Bauer

Dennis R Rice

Janet M Cassells

Norman R Reber

Bonnie J Reber, Legal Representative

This invention is directed to the use of non-sulfur containing compounds as collectors in the froth flotation of certain mineral sulfide and metallic compounds. These non-sulfur-containing compounds may be from natural sources, such as vegetable oils, or synthesized commercial sources. These non-sulfide collectors can be used singularly, in combinations, and in mixtures with known commercial sulfur containing collectors. These non-sulfur-containing collectors are compatible with common frothers.

Flotation of sulfide mineral species with oils

A process and apparatus for the biological production of sulfuric acid are provided. The invention utilizes a pile containing a sulfur material, an acidophilic microbe and, preferably, a packing material. The pile is aerated and contacted with an aqueous solution.

Materials and method for the biological production of sulfuric acid

A process and apparatus for the biological production of sulfuric acid are provided.

Method for the microbiological production of sulfuric acid

Disclosed and claimed are efficient methods for leaching minerals from ores using an acidic solution such as sulfuric acid. Additional factors which can improve mineral recovery include the use of an alkali metal halide, grinding the ore, addition of a carbon source, and/or, adjustment of the temperature at which the process is carried out. Minerals such as titanium, iron, nickel, cobalt, silver and gold may be recovered by the methods of the present invention.

Methods for leaching of ores

The subject invention pertains to the use of non-toxic heavy liquids and slurries in the separation of components of ores, concentrates, residues, soils, and scrap. Specifically exemplified herein is the use of cesium and/or rubidium salts in separation processes. These salts are particularly advantageous because of their high specific gravity and solubility in water and, their low solution viscosities.

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Tucson, AZ, United States of America

Michael G Greene