Solarworld Aktiengesellschaft

Bayer Technology Services Gmbh

Werner Dick

Hans-Dieter Block

Stephan Klein

Johannes-Peter Schäfer

Hans-Joachim Leimkühler

Dirk Müller

Karl-Gustav Pattberg

Ruth Kessler

Karl Helmut Berg

The invention relates to a method of producing silane or hydrochlorosilanes by disproportionation of a higher chlorinated hydrochlorosilane or a mixture of said hydrochlorosilanes in the presence of a catalyst. Before the catalyst is used, it is a) washed with hyper-pure water in one or several steps; b) transferred in the water-moist state to the reactor in which the disproportionation is to proceed; c) treated in the reactor with boiling methanol or rinsed with anhydrous methanol; and d) the methanol is removed from the catalyst by evacuation and/or stripping with inert gas. The invention further relates to a method for treating disproportionation catalysts.

Method for producing silanes

A device for determining the residual liquid content of solids cakes in a centrifuge basket. The device includes two electrodes protruding through a wall of the basket and into the solids cake; a conductivity or capacitance measuring device () measuring the conductivity of the solids cake between the electrodes; and evaluation and control units contactlessly receiving data from the measuring device to affect the operation of the centrifuge.

Device for determining the residual liquid content of solids cakes in centrifuges

The invention relates to a method for removing anhydrous acids and hydrohalogens from trichlorosilane by contacting the trichlorosilane with solid bases. The invention further relates to the use of the trichlorosilane so purified in the production of silane and/or super-pure silicon.

Method for purifying trichlorosilane

Growing community of inventors

Leverkusen, Germany

Werner Dick