Process for preparing cyclic organohydrogensiloxanes

Details Process for preparing cyclic organohydrogensiloxanes Process for preparing cyclic organohydrogensiloxanes

1994-07-05

1995-03-07

Shaver, Paul F.

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

Organic compounds

Silicon containing

C07F 708

Patent

active

053959566

ABSTRACT:
A process for preparing cyclic organohydrogensiloxanes. The process comprises contacting an organohydrogendichlorosilane with about a stoichiometric equivalent of water to form a hydrolyzate. The hydrolyzate is diluted in an inert solvent and contacted with an acidic rearrangement catalyst to effect formation of cyclic organohydrogensiloxanes. The cyclic organohydrogensiloxanes are separated from inert solvent and linear organohydrogensiloxanes. The inert solvent and linear organohydrogensiloxanes are then recycled to the process for further contact with the acidic rearrangement catalyst.

REFERENCES:
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patent: 3714213 (1973-01-01), Miller et al.
patent: 4895967 (1990-01-01), Crivello et al.
patent: 5189193 (1993-02-01), Freeburne et al.
patent: 5241097 (1993-08-01), Zupancic et al.
All-Union Electrotechnical Institute, Mar. 5, 1955, pp. 1061-1063.
Polymer, Wright et al. vol. 11, pp. 464-471 (1969).

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