| 摘要 |
PCT No. PCT/FR97/01034 Sec. 371 Date Sep. 7, 1999 Sec. 102(e) Date Sep. 7, 1999 PCT Filed Jun. 11, 1997 PCT Pub. No. WO97/47629 PCT Pub. Date Dec. 18, 1997Improved method for obtaining organosilanes comprising: a redistribution reaction between a chlorinated organohydrogenosilane and an organo-substituted and optionally chlorinated silane, the distribution reaction taking place in the presence of a sufficient amount of a catalyst consisting of a Lewis acid of formula (3) M(X)d in which: M represents a metal selected among Ti, Fe, Cu, Ag, Zn, Cd, Hg, Al, Ga, In, B, Sn, Pb, Sb, and Bi; X represents a halogen atom; d represents the valency of metal M; and separation by distillation of the chlorinated organohydrogenosilane produced by redistribution; the said method being characterized in that, after redistribution, a redistribution catalyst inhibiting compound is used. This catalyst is selected among the fluid polyorganosiloxanes (POS) having a viscosity at 25 DEG C. not exceeding 5000 mPa.s and is used in such proportions that the ratio r=number of gram-atoms of metal M given by the catalyst/number of gram-atoms of oxygen given by the inhibitor does not exceed 0.9. |
