Wacker Chemie Ag

Wacker-chemie Gmbh

Jochen Gross

Wilfried Kalchauer

Herbert Straussberger

Willibald Streckel

Konrad Mautner

Willi Streckel

Till Wuestenfeld

Wolfgang Zoller

Pneumatic conveying of fine solids in the direct synthesis of alkylchlorosilanes conveying gas containing at least 50% by volume of alkyl chloride. The conveying apparatus preferably contains a means for switching conveying gas in the pneumatic conveying of fine solids.

Conveying of fine solids in the synthesis of alkylchlorosilanes

The invention relates to a process for the direct synthesis of methylchlorosilanes by reaction of chloromethane with a contact composition comprising silicon and copper catalyst, wherein the concentration of oxygen in the chloromethane used is reduced by mixing a) chloromethane which contains oxygen, and b) chloromethane which contains a gaseous boron compound.

Process for preparing methylchlorosilanes

A process for the direct synthesis of methylchlorosilanes by reaction of chloromethane with a contact composition comprising silicon, copper catalyst and from 10 to 90 ppm of strontium leads to increased selectivity and higher production rate.

The invention relates to a process for the direct synthesis of methylchlorosilanes by reaction of chloromethane with a contact composition comprising silicon, copper catalyst and a total proportion of sodium and potassium of from 10 to 400 ppm.

Dust recirculation in the direct synthesis of chlorosilanes and methylchlorosilanes in a fluidized bed

In the process for the direct synthesis of methylchlorosilanes from chloromethane and silicon in the presence of a copper catalyst and promoter, the reaction mixture comprising chloromethane, methylchlorosilanes, and dust-like components comprising copper, promoter and silicon are removed continuously. The dust-like components are separated from the reaction mixture and cooled with liquid chloromethane.

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Tuessling, Germany

Jochen Gross