Dow Corning Corporation

Hemlock Semiconductor Corporation

Guy Leo Reggio

James Richard Hahn

Kai Su

Gary Thomas Burns

Qin Deng

Robert G Brink

David M Muller

A method for removing metal contaminates from solution using mercapto-functional silica xerogels. The mercapto-functional silica xerogels are characterized by having a surface area greater than 365 m.sup.2 /g, an average pore diameter of at least 6 nm, and a pore volume of at least 2 cm.sup.3 /g. The mercapto-functional silica xerogels are particularly useful for removing Group VIII metals such as platinum from solutions comprising polyorganosiloxane fluids and resins.

Method for removing metal contaminants from solution using

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.

Method for determining organoamines concentrations in chlorosilane

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Midland, MI, United States of America

Guy Leo Reggio