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:
Jan. 20, 2009
Filed:
Mar. 15, 2006
Andrew Bruce Gammie, Florence, KY (US);
Christopher Darren Gatti, Hebron, KY (US);
Roland Lee Halm, Midland, MI (US);
Christopher James Kozenski, Perry Park, KY (US);
Dennis Gene Van Koevering, Midland, MI (US);
Andrew Bruce Gammie, Florence, KY (US);
Christopher Darren Gatti, Hebron, KY (US);
Roland Lee Halm, Midland, MI (US);
Christopher James Kozenski, Perry Park, KY (US);
Dennis Gene Van Koevering, Midland, MI (US);
Dow Corning Corporation, Midland, MI (US);
Abstract
Chlorosilanes such as dimethyldichlorosilane are hydrolyzed in a first super-azeotropic hydrochloric acid distillation column A to produce cyclosiloxanes, chlorosiloxanes, and hydrogen chloride gas. The cyclosiloxanes and the chlorosiloxanes are washed and separated according to their volatility in a second sub-azeotropic hydrochloric acid distillation column B, to produce a substantially chloride free volatile cyclosiloxane stream and a substantially chloride free non-volatile siloxane stream. The process is substantially chloride efficient.