Method for decolorizing purification of halogenated silane

Details Method for decolorizing purification of halogenated silane Method for decolorizing purification of halogenated silane

1992-08-27

1993-05-11

Shaver, Paul F.

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

Organic compounds

Silicon containing

423342, C07F 708

Patent

active

052102505

ABSTRACT:
A simple but very effective and reliable method is proposed for the decolorizing purification of a halogenated silane compound, e.g., methyl trichlorosilane, colored by containing a very small amount of heavy metal impurities such as iron. The method comprises: contacting the halogenated silane compound with a small amount of a cationic surface active agent which is solid and insoluble in the silane such as a quaternary ammonium salt, e.g., trimethyl octadecyl ammonium chloride, for 2 to 240 minutes; and then separating the silane compound from the cationic surface active agent.

REFERENCES:
patent: 3414603 (1968-12-01), Malavsky
patent: 3801615 (1976-04-01), Chuang
patent: 4661612 (1987-04-01), George et al.
patent: 5138081 (1992-08-01), De Vries et al.

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