Chemistry of inorganic compounds – Oxygen or compound thereof – Metal containing
Reexamination Certificate
2010-03-02
2011-10-04
Mayes, Melvin (Department: 1732)
Chemistry of inorganic compounds
Oxygen or compound thereof
Metal containing
C423S299000, C423S324000, C423S335000, C423S462000
Reexamination Certificate
active
08029763
ABSTRACT:
The present invention is drawn to a method for removing colloidal titanium dioxide and titanium oxychloride from by-product hydrochloric acid. The method includes adding phosphate ion source and quaternary amine to the by-product acid to cause the titanium dioxide and the titanium oxychloride to form a precipitate. The precipitate can then be separated from the acid, thus producing a decontaminated hydrochloric acid product with reduced levels of titanium.
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Kemira, Inc., Georgia Tech Research Institute Environmental Science and Technology Laboratory Pollution Prevention Project, Savannah, GA, 9 pages.
Haydock Consulting Services, LC
Mayes Melvin
Stalder Melissa
Thorpe North & Western LLP
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