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. 08, 2015
Filed:
Sep. 02, 2011
Masayuki Hasegawa, Niigata, JP;
Yoichi Tonomura, Niigata, JP;
Tohru Kubota, Niigata, JP;
Takeshi Aoyama, Niigata, JP;
Shuji Tanaka, Niigata, JP;
Masayuki Hasegawa, Niigata, JP;
Yoichi Tonomura, Niigata, JP;
Tohru Kubota, Niigata, JP;
Takeshi Aoyama, Niigata, JP;
Shuji Tanaka, Niigata, JP;
Shin-Etsu Chemical Co., Ltd., Tokyo, JP;
Abstract
The method comprises at least three steps of a hydrogenation step () and/or a chlorination step (), an impurity conversion step (), and a purification step (). In the impurity conversion step (), an aldehyde compound represented by the general formula Ar—R—CHO (Ar; denotes a substituted or unsubstituted aryl group, R; denotes an organic group having two or more carbon atoms) is added to convert donor impurities and acceptor impurities contained in a chlorosilane distillate to a high-boiling substance. The chlorosilane distillate after the donor impurities and acceptor impurities have been converted to a high-boiling substance is sent to the purification step (). In the purification step (), high purity chlorosilanes from which the donor impurities and acceptor impurities have been thoroughly removed are obtained by using a distillation column or the like, where the high purity chlorosilanes are recovered outside the system from the top of the column.