Process for preparing powder of silicon compound

Details Process for preparing powder of silicon compound Process for preparing powder of silicon compound

1994-03-11

1995-12-26

Straub, Gary P.

Chemistry of inorganic compounds

Silicon or compound thereof

Oxygen containing

556453, 556455, 556456, 556457, 556458, C01B 3312, C07F 704

Patent

active

054785464

ABSTRACT:
An alkoxysilane is brought into a hydrolysis-polycondensation reaction using a fluoride salt, e.g. NaF, or a fluorine-containing silicon compound having an Si--F bond in its molecule, e.g. FSi(OCH.sub.3).sub.3, as a catalyst, to produce a powder of a silicon compound such as silica. The process reduces markedly the period of time required for the hydrolysis-polycondensation reaction and yields a porous silicon compound powder with low bulk specific gravity. The catalyst is excellent in handleability and safety.

REFERENCES:
patent: 4765818 (1988-08-01), Che et al.
patent: 5063003 (1991-11-01), Gonzalez-Oliver
patent: 5086145 (1992-02-01), Morimoto et al.

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