Process for preparation of .OMEGA.-alkenylchlorosilanes
AssigneeDow Corning Corporation
InventorsDonald E. McVannel, Kelly J. Wall
Life of this patent
Estimating the term…
Abstract
The present invention is a process for the preparation of omega-alkenylchlorosilanes. The process comprises reacting a mixture comprising an .alpha.,.OMEGA.-diene and an organohydrosilane in the presence of a supported platinum catalyst to form an .OMEGA.-alkenylchlorosilane, where the mole ratio of the .alpha.,.OMEGA.-diene to the organohydrosilane is within a range of about 6:1 to 50:1. A preferred process is run as a continuous process employing a fixed-bed of silica gel supported platinum catalyst and excess .alpha.,.OMEGA.-diene is recovered and recycled to the process.
Claims34
A process for preparing .OMEGA.-alkenylchlorosilanes, the process comprising:
- (A) contacting a mixture comprising an organohydrosilane described by formula
- R.sub.a HSiCl.sub.3-a
- and an .alpha.,.OMEGA.-diene comprising five to 14 carbon atoms, where the mole ratio of the .alpha.,.OMEGA.-diene to the organohydrosilane is within a range of about 6:1 to 50:1, with a supported platinum catalyst at a temperature within a range of about 10.degree. C. to 100.degree. C., and
- (B) recovering an .OMEGA.-alkenylchlorosilane described by formula
- R.sub.a R.sup.1 SiCl.sub.3-a
- where each R is independently selected from a group consisting of alkyls comprising one to six carbon atoms, R.sup.1 is selected from a group consisting of .OMEGA.-alkenyls comprising five to 14 carbon atoms, and a=0, 1, or 2.
Dependencies are inferred from the claim text.