Phillips Petroleum Company

Mbx Systems, Inc.

Sean P Premeau

Tom L Young

Michael G Greene

Kelly L Karlage

Dennis R Rice

Janet M Cassells

Kevin L Stuffle

James E Sharp

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

Disclosed and claimed is an efficient process for extraction of metals from ores using carbon catalyzed leaching. Specifically exemplified is the extraction of cobalt and nickel from laterite ore.

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Tucson, AZ, United States of America

Sean P Premeau