Method for determining organoamines concentrations in chlorosila

Details Method for determining organoamines concentrations in chlorosila Method for determining organoamines concentrations in chlorosila

1995-05-17

1996-06-25

Warden, Jill

Chemistry: analytical and immunological testing

Nitrogen containing

Amine and quaternary ammonium

436111, G01N 3012

Patent

active

055299350

ABSTRACT:
A process for determining the organoamines concentrations in chlorosilane. The process comprises separating a mixture comprising as a major portion a chlorosilane and as minor portion an organoamine having a boiling point less than or about the boiling point of the chlorosilane, where the organoamine is complexed in situ in the chlorosilane to form an organoamine complex which vaporizes at a temperature greater than the boiling point temperature of the chlorosilane, into a vapor phase comprising the chlorosilane and a solid phase comprising the organoamine complex. An aqueous solution of the solid phase is formed and analyzed by ion exchange chromatography for organoamine content. The present invention is particularly useful for analyzing chlorosilanes for dimethylamine and trimethylamine where the chlorosilane or residual hydrogen chloride in the chlorosilane serves to complex the organoamine.

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