Preparation of hydrogenosilanes by catalytic hydrogenolysis of polysilanes
US6271407A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 25, 2001 |
| Grant date | Aug 7, 2001 |
| Priority date | — |
| Expiry date | Jan 25, 2021 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07F7/126
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
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.sub.3)Cl.sub.2 Si--SiCl(CH.sub.3).sub.2 ; (CH.sub.3)Cl.sub.2 Si--SiCl.sub.2 (CH.sub.3); (CH.sub.3)Cl.sub.2 Si--Si(CH.sub.3).sub.3 ; (CH.sub.3).sub.2 ClSi--SiCl(CH.sub.3).sub.2 ; (CH.sub.3)Cl.sub.2 Si--SiCl(Ch.sub.3)--SiCl.sub.2 (CH.sub.3); (CH.sub.3)Cl.sub.2 Si--Si(CH.sub.3)(SiCH.sub.3 Cl.sub.2)--SiCl.sub.2 CH.sub.3. The hydrogenated monosilanes CH.sub.3 H.sub.2 ClSi; (CH.sub.3).sub.2 HClSi; CH.sub.3 HCl.sub.2 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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.