Other

Wacker Chemie Ag

Consortium Fur Elektrochemische Industrie Gmbh

Consortium F&uuml;r Elektrochemische Industrie Gmbh

Christoph Ruedinger

Hans-Juergen Eberle

Ragnar Bogner

Wolfgang Kohlmann

Jens Felix Knoth

Herbert Vogel

Michael Hallmann

Dirk Groke

Richard Bosch

Norbert Zeitler

Andrea Soler

Gudrun Wittmann

Max Wollin

Reinhard Jering

The invention relates to a process for converting silicon tetrachloride (STC) to trichlorosilane (TCS), by introducing reactant gas containing STC and hydrogen into a reaction zone of a reactor in which the temperature is 1000-1600&#xb0; C., wherein the reaction zone is heated by a heater located outside the reaction zone and the product gas containing TCS which forms is then cooled, with the proviso that it is cooled to a temperature of 700-900&#xb0; C. within 0.1-35 ms, wherein the reactant gas is heated by the product gas by means of a heat exchanger working in countercurrent, wherein reactor and heat exchanger form a single, gas-tight component, wherein the component includes one or more ceramic materials selected from the group consisting of silicon carbide, silicon nitride, graphite, SiC-coated graphite and quartz glass.

Process for converting silicon tetrachloride to trichlorosilane

The invention relates to a method for producing carboxylic acids having 1-3 carbon atoms, characterized in that 2,3-butanediol and/or acetoin are reacted to form carboxylic acids having 1-3 carbon atoms.

Method for producing carboxylic acids having 1-3 carbon atoms from renewable resources

The invention relates to a method for continuously producing 2-butanone from 2,3-butanediol in hot pressurized water having an added electrolyte, characterized in that a compound selected from among the group comprising Ce(SO), Fe(SO), Al(SO) is used as the added electrolyte.

Method for the continuous production of 2-butanone in hot pressurized water having an added electrolyte

A process for preparing saturated carboxylic acids having from 1 to 4 carbon atoms at a reaction temperature of from 100&deg; C. to 400&deg; C. and pressures of from 1.2&times;10 Pa to 51&times;10 Pa by gas phase oxidation of saturated and/or unsaturated C -hydrocarbons, with an oxygen-containing gas and water vapor in the presence of at least one catalyst. The gas leaving the reactor is partly recirculated in a reaction gas circuit. This reaction gas circuit is configured such that part of the organic acids formed in the gas-phase oxidation is taken from the gas leaving the reactor so that the acid content of the recirculated part of the gas leaving the reactor is from 0.01% to 6.0% by volume.

Process for preparing saturated carboxylic acids having from 1 to 4 carbon atoms

Process for preparing saturated carboxylic acids having from 1 to 4 carbon atoms from butenes and butanes

A process and an apparatus are for preparing saturated carboxylic acids having from one to four carbon atoms by gas-phase oxidation at a reaction temperature of from 100&deg; C. to 400&deg; C. and pressures of from 1.2&times;10,to 51&times;10,Pa in the presence of saturated or unsaturated C,-hydrocarbons and mixtures thereof. Also present in the reactor are an oxygen-containing gas and water vapor and in the presence of at least one catalyst, with part of the reactor outlet gas being recirculated in a reaction gas circuit. The acid concentration in the recirculated portion is reduced by means of a separation step, and the crude acid is separated from the reactor outlet gas by means of a countercurrent scrubber.

Process and apparatus for preparing saturated carboxylic acids having one to four carbon atoms

A process for preparing acetic acid by gas-phase oxidation of saturated C,-hydrocarbons and their mixtures with unsaturated C,-hydrocarbons in a tube reactor using a coated catalyst comprising an inert nonporous support body and a catalytically active mixed oxide composition comprising (a) one or more oxides selected from the group consisting of titanium dioxide, zirconium dioxide, tin dioxide and aluminum oxide and (b) from 0.1% to 1.5% by weight, based on the weight of the component (a) and per m,/g of specific surface area of the component (a), of vanadium pentoxide applied to the outer surface of the support body, wherein a gas mixture comprising oxygen or oxygen-containing gas, one or more C,-hydrocarbons and water vapor and having a C,-hydrocarbon/air (oxygen) volume ratio of from 0.2/99.8 to 25/75 and a C,-hydrocarbon/water vapor volume ratio of from 1/1 to 1/60 is reacted over the coated catalyst at a temperature of from 100&deg; C. to 400&deg; C. and a gauge pressure of from 0.2 to 50 bar.

Process for preparing acetic acid by gas-phase oxidation of saturated C4-hydrocarbons and their mixtures with unsaturated C4-hydrocarbons

The invention relates to a shell catalyst for producing acetic acid by gas-phase oxidation of unsaturated C,-hydrocarbons, comprising an inert non-porous carrier and a catalytically active mixed oxide material applied on the outer surface of the carrier, wherein said material contains (a) one or several oxides from the group titanium dioxide, zircon dioxide, stannic dioxide, aluminum oxide, and b) 0.1 to 1.5 wt. % vanadium pentoxide in relation to the weight of the constituent (a) and per m,/g of the specific surface of the constituent (a).

Shell catalyst for producing acetic acid by gas phase oxidation of unsaturated C4 -hydrocarbons

There is a process for producing coated catalysts for the gas-phase oxidation of C.sub.4 hydrocarbons to maleic anhydride. A vanadyl phosphate catalyst precursor is prepared having a V/P ratio of from 1:0.5 to 1:2 and a mean vanadium oxidation state of from 3.9 to 4.5. The vanadyl phosphate precursor is then calcined by heating for a several hours at a temperature of from 200.degree. C. to 500.degree. C. before being applied, in an aqueous suspension to the support bodies. Furthermore, there is the use of these coated catalysts in processes for the gas-phase oxidation of saturated or unsaturated C.sub.4 -hydrocarbons to maleic anhydride.

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Starnberg, Germany

Christoph Ruedinger