Wacker-chemie Gmbh

Wacker Chemie Ag

Ulrich Goetze

Wilfried Kalchauer

Herbert Straussberger

Willibald Streckel

Konrad Mautner

Norbert Zeller

Anton Schinabeck

Edgar Schmidt

Hans Geschonke

Kurt Kreilein

Michael Hansel

Peter-Paul Winkler

Axel Wolf

The invention relates to a process for preparing organosilanes of the general formula 1RSi&#x2014;R',&#x2003;&#x2003;(1)in which hydrosilanes of the general formula 2RSi&#x2014;H&#x2003;&#x2003;(2)are reacted with halohydrocarbons of the general formula 3R&#x2032;&#x2014;X&#x2003;&#x2003;(3)where

Process for preparing organosilanes

A process for the direct synthesis of organochlorosilanes using CuCl prepared from the copper-containing residues from the direct synthesis of organochlorosilanes, where, in the preparation of the CuCl, in a first step, copper from an aqueous suspension of the copper-containing residues is oxidized to CuCl,using mineral acid and oxidant, where mineral acid or oxidant or mineral acid and oxidant contain chlorine, giving an aqueous CuCl,solution, and in a second step, the aqueous CuCl,solution is reduced to CuCl using elemental iron.

Process for the direct synthesis of organochlorosilanes using recovered CuCl catalyst

In a process for the direct synthesis of methylchlorosilanes, chloromethane is reacted with a catalyst composition comprising silicon, copper catalyst, zinc promoter and pyrogenic silicic acid.

Process for the preparation of organochlorosilanes

In the process of the present invention, disilanes are reacted with hydrogen chloride in the presence of a catalyst comprising

Process for preparing hydrogen-containing methylchlorosilanes

Process for the preparation of methyl chloride, which comprises reacting methanol with hydrogen chloride in a concentration below the particular ageotropic concentration in the liquid phase in the presence of an amine hydrohalide.

Process for the preparation of halogenoalkanes

The subject of the invention is a microsuspension polymerization in water of vinyl chloride, which is carried out in the presence of monomer-soluble radical-initiators and emulsifiers. According to the invention, from about 0.01 to 0.5% by weight, based on the weight of the water, of polymers containing mono-basic or dibasic carboxylic acid units and/or salts thereof are added. Furthermore, in a preferred embodiment, emulsifiers containing perfluorinated alkyl groups are also used. Stabilization of the microsuspension latex, which is per se sensitive to shearing action, and reduction in the amount of emulsifiers used are achieved.

Process for the polymerization of vinyl chloride according to the

An apparatus for carrying out chemical reactions in a continuous manner, particularly polymerizations, comprising a substantially axially symmetrical central reaction chamber containing a plurality of vertically spaced substantially axially symmetrical separators dividing said central reaction chamber into a plurality of compartments, a rotatable shaft extending perpendicularly to said separators through each of said separators adapted to mount agitator blades therein for each of said plurality of compartments, means to rotate said rotatable shaft, openings in said separators adapted to allow a restricted flow of liquid between said plurality of compartments, a plurality of ring-shaped conduits, each in communication with one of said plurality of compartments by two unrestricted openings therein, and openings in the topmost and bottommost of said plurality of compartments and in said ring-shaped conduits adapted to receive and dispense fluids; as well as a method of continuous suspension polymerization of vinyl monomers in the presence of water and an oil-soluble free-radical polymerization catalyst utilizing the said apparatus.

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Burghausen, Germany

Ulrich Goetze