The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 20, 2021
Filed:
Feb. 08, 2016
Applicant:
Iluka Resources Limited, Perth, AU;
Inventor:
Phillip James Dundas, Perth, AU;
Assignee:
ILUKA Resources Limited, Perth, AU;
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C22B 34/14 (2006.01); C22B 9/10 (2006.01); C04B 35/626 (2006.01); C04B 35/48 (2006.01); C01G 49/14 (2006.01); C01G 23/00 (2006.01); C01G 25/06 (2006.01); C01B 33/20 (2006.01); C22B 3/08 (2006.01);
U.S. Cl.
CPC ...
C22B 34/14 (2013.01); C01B 33/20 (2013.01); C01G 23/008 (2013.01); C01G 25/06 (2013.01); C01G 49/14 (2013.01); C04B 35/481 (2013.01); C04B 35/62625 (2013.01); C04B 35/62645 (2013.01); C22B 3/08 (2013.01); C22B 9/10 (2013.01); C01P 2006/62 (2013.01); C01P 2006/63 (2013.01); C01P 2006/64 (2013.01); C01P 2006/80 (2013.01); C04B 2235/72 (2013.01); C04B 2235/9661 (2013.01);
Abstract
A process for improving the grade and optical quality of zircon, comprising: baking a mixture of a zircon feed and concentrated sulphuric acid at a baking temperature in the range of from 200 up to 400° C., and for a time to form water leachable sulphates with impurities therein including at least iron and titanium; leaching the baked mixture to dissolve the leachable sulphates; and separating the zircon from the leachate containing the leached sulphates, which separated zircon is thereby of improved grade and optical quality.