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:
Aug. 07, 2001
Filed:
Jan. 25, 2001
Pascale Colin, Chassieu, FR;
Claude De Bellefon, Meyzieu, FR;
Christina Garcia-Escomel, Lyons, FR;
Pierre Grenouillet, Fontaines-sur-Saône, FR;
Philippe Morel, Chuzelles, FR;
Rhodia Chimie, Courbevoie Cedex, FR;
Abstract
The invention concerns a method for preparing hydrogenated alkylmonosilanes, by catalytic hydrogenolysis, under hydrogen pressure, of halogenoorganopolysilanes, improving known methods, in particular by facilitating implementation, and in terms of cost-effectiveness and performance which are shown by the efficiency of the resulting hydrogenated monosilanes. In said method the starting polysilanes are of the type: (CH,)Cl,Si—SiCl(CH,),; (CH,)Cl,Si—SiCl,(CH,); (CH,)Cl,Si—Si(CH,),; (CH,),ClSi—SiCl(CH,),; (CH,)Cl,Si—SiCl(Ch,)—SiCl,(CH,); (CH,)Cl,Si—Si(CH,)(SiCH,Cl,)—SiCl,CH,. The hydrogenated monosilanes CH,H,ClSi; (CH,),HClSi; CH,HCl,Si are obtained by contacting said polysilanes with gaseous hydrogen under pressure, in the presence of a catalytic system AB comprising a hydrogenation catalyst precursor A and an auxiliary B for dissolving precursor A in the reaction medium. Said catalytic system is further characterized in that it is reductant-free.