Process for the disproportionation of silanes
AssigneeRhone-Poulenc Specialites Chimiques
InventorsJean-Luc Lepage, Gerard Soula
Life of this patent
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Abstract
Silane, SiH.sub.4, and diochlorosilane, particularly suitable for the preparation of silicon are readily obtained by disproportionating trichlorosilane to dichlorosilane and, ultimately silane by reacting: (a) a silane containing at least one Si-H bond, of the general formula R.sub.n H.sub.m SiX.sub.4-(n+m) wherein R represents an alkyl or aryl group, x represents a halogen or an alkoxy group, n is an integer equal to 0, 1, 2 or 3 and m is an integer equal to 1, 2 or 3, and (b) a catalyst system comprising an ionic inorganic salt of the formula M.sup.+ A.sup.- and a compound capable of at least partially dissociating the salt by complexing its cation M.sup.+.
Claims21
A process for the disproportionation of silanes having at least one Si--H bond which comprises reacting:
- (a) a silane comprising at least one Si--H bond, of the general formula R.sub.n H.sub.m SiX.sub.4-(n+m) wherein R represents an alkyl or aryl group, X represents a halogen or an alkoxy group, n is an integer equal to 0, 1, 2 or 3 and m is an integer equal to 1, 2 or 3, and
- (b) a catalyst system comprising an ionic inorganic salt and a complexing agent which at least partially dissociates said salt and complexes the cation of said salt.
A catalyst system for catalyzing the disproportionation of silanes having at least one Si-H bond comprising an ionic inorganic salt and a complexing agent capable of at least partially dissociating said salt and complexing the cationic moiety of said salt.
Dependencies are inferred from the claim text.