Dow Corning Corporation

Dennis Gene Van Koevering

Roland L Halm

Charles Alan Hall

Christopher Darren Gatti

Andrew Bruce Gammie

Christopher James Kozenski

Todd F Bischoff

Roland Lee Halm

Chlorosilanes such as dimethyldichlorosilane are hydrolyzed in a first super-azeotropic hydrochloric acid distillation column A to produce cyclosiloxanes, chlorosiloxanes, and hydrogen chloride gas. The cyclosiloxanes and the chlorosiloxanes are washed and separated according to their volatility in a second sub-azeotropic hydrochloric acid distillation column B, to produce a substantially chloride free volatile cyclosiloxane stream and a substantially chloride free non-volatile siloxane stream. The process is substantially chloride efficient.

Reactive distillation of chlorosilanes

Method of making hydroxy end-terminated linear siloxanes

An improved structured packing for use in a liquid-vapor contact column. More specifically in a structured packing for liquid-vapor contact where the structured packing comprises laterally orientated channels having peripheral openings, the improvement comprises substantially occluding the peripheral openings with a barrier film. The present invention also includes an improved liquid-vapor contact column comprising a column shell having positioned within a structured packing comprising an outer surface in non-occlusive proximation to the column shell and laterally orientated channels having peripheral openings through the outer surface, the improvement comprising substantially occluding the peripheral openings with a barrier film.

Structured packing containing liquid-vapor contact column

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Midland, MI, United States of America

Dennis Gene Van Koevering