Phillips Petroleum Company

Mbx Systems, Inc.

Kelly L Karlage

Tom L Young

Michael G Greene

Sean P Premeau

Dennis R Rice

Kevin L Stuffle

Janet M Cassells

James E Sharp

James E Sharp, Deceased

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 provides a novel process and bioreactor for enhancing the bioleaching of metals from sulfide mineral concentrations.

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Tucson, AZ, United States of America

Kelly L Karlage