Separation of methylchlorosilanes from high boiling residues of

Details Separation of methylchlorosilanes from high boiling residues of Separation of methylchlorosilanes from high boiling residues of

1993-04-19

1994-02-22

Shaver, Paul F.

Organic compounds -- part of the class 532-570 series

Organic compounds

Silicon containing

556468, C07F 708

Patent

active

052888924

ABSTRACT:
A process for separating methylchlorosilanes from high boiling residues from the methylchlorosilane synthesis, in which cleavable methylchlorodisilanes which are present in the residues and which have at least two chlorine atoms attached to one silicon atom are cleaved with hydrogen chloride in the presence of a catalyst which remains in the reaction mixture, which comprises cleaving the methylchlorodisilanes in the presence of by-products which are more volatile than the cleavable methylchlorodisilanes in the high boiling residues from the methylchlorosilane synthesis which have a boiling point of at least 70.degree. C. under normal conditions and continuously removing the more volatile by-products from the reaction mixture along with the methylchlorosilanes and the noncleavable methylchlorodisilanes.

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patent: 4552973 (1985-11-01), Feldner et al.
Chemie und Technologie der Silicone, W. Noll, 1968, pp. 35-36.
Chemistry and Technology of Silicones, W. Noll, 1968, pp. 38-40.
Calas et al., "Some Practical Uses of the Disilane Residue from the Direct Synthesis of Methylchlorosilanes", 1982, pp. 117-130.

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