Chemistry of inorganic compounds – Carbon or compound thereof – Elemental carbon
Reexamination Certificate
2011-08-30
2011-08-30
Mayes, Melvin C (Department: 1732)
Chemistry of inorganic compounds
Carbon or compound thereof
Elemental carbon
Reexamination Certificate
active
08007754
ABSTRACT:
The present invention relates to a method for separating diamond from gangue minerals. In particular, this method relates to the addition of a first reagent or reagents which contact the diamond in diamond ore slurry to at least partially remove hydrophilic coatings from the diamond surfaces. A second reagent or reagents may also be added to the slurry so that the reagent may adsorb on the diamond surfaces and thereby enhance the hydrophobicity of diamonds. The increase in hydrophobicity may improve the flotation of diamonds.
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Kouznetsov Dmitri
Yoon Roe Hoan
Davis Sheng H
Grossman Tucker Perreault & Pfleger PLLC
Mayes Melvin C
Mineral and Coal Technologies, Inc.
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