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:
Sep. 03, 2013
Filed:
Dec. 16, 2009
Applicants:
Kenichi Nakagawa, Sakai, JP;
Takanori Morita, Sakai, JP;
Inventors:
Kenichi Nakagawa, Sakai, JP;
Takanori Morita, Sakai, JP;
Assignee:
Sakai Chemical Industry Co., Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F21V 9/00 (2006.01); G02B 7/10 (2006.01); G02C 7/10 (2006.01); G02F 1/361 (2006.01); G03B 11/00 (2006.01); C01G 25/02 (2006.01); C01G 23/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
The invention provides a process for producing an aqueous dispersion of zirconium oxide comprising: reacting a zirconium salt with an alkali in water to obtain a slurry of particles of zirconium oxide; filtering, washing, and repulping the slurry; adding an organic acid to the resulting slurry in an amount of one mole part or more per mole part of the zirconium in the slurry; hydrothermally treating the resulting mixture at a temperature of 170° C. or higher; and washing the resulting aqueous dispersion of particles of zirconium oxide.