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:
Jun. 13, 2017
Filed:
Dec. 17, 2014
Daiichi Kigenso Kagaku Kogyo Co., Ltd., Osaka-shi, Osaka, JP;
Taichi Kunisada, Osaka, JP;
Nobutaka Nochioka, Osaka, JP;
DAIICHI KIGENSO KAGAKU KOGYO CO., LTD., Osaka, JP;
Abstract
A method for producing an aqueous zirconium chloride solution includes: grinding zircon sand to an average particle diameter of 10 μm or less; adding a sodium compound to the ground zircon sand to thereby obtain a mixture; firing the mixture in an iron container at 400° C. or less to thereby obtain a decomposed product; firing the decomposed product in a stainless-steel container at 400 to 1,100° C. to thereby obtain a fired product; dispersing the fired product in water to prepare a dispersion, and washing the fired product with water while adjusting the temperature of the dispersion to 70° C. or less, thereby obtaining a water-washed cake; washing the water-washed cake with hydrochloric acid with a pH of 1 to 6 to thereby obtain zirconium hydrate; and dissolving the zirconium hydrate in hydrochloric acid, and then removing insoluble components to thereby obtain a salt solution.