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:
Dec. 10, 2024
Filed:
Jan. 21, 2020
Applicant:
Tokuyama Corporation, Yamaguchi, JP;
Inventors:
Junya Sakai, Yamaguchi, JP;
Shoji Iiyama, Yamaguchi, JP;
Assignee:
Tokuyama Corporation, Yamaguchi, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C01B 33/107 (2006.01); B01D 3/00 (2006.01); B01D 3/34 (2006.01);
U.S. Cl.
CPC ...
C01B 33/10778 (2013.01); B01D 3/009 (2013.01); B01D 3/343 (2013.01); C01B 33/1071 (2013.01); C01P 2006/80 (2013.01);
Abstract
A method for producing purified chlorosilanes includes bringing crude chlorosilanes, such as crude trichlorosilane and crude silicon tetrachloride, which contain a boron compound and/or a phosphorus compound, into contact with chlorine (preferably 1 ppm mole to 3000 ppm mole with respect to 1 mole of crude chlorosilanes) in presence of alkylphenol such as 2-methylphenol, and then distilling the crude chlorosilanes.