Evonik Degussa Gmbh

Degussa Aktiengesellschaft

Hubert Redlingshöfer

Christoph Weckbecker

Klaus Huthmacher

Jan-Olaf Barth

Andreas Dörflein

Stephan Kretz

Caspar-Heinrich Finkeldei

Yiquan Yang

Hongbin Zhang

Weiping Fang

Youzhu Yuan

Xingguo Yan

Michael Rückriegel

Hans Joachim Hasselbach

Horst-Werner Zanthoff

Johannes Lercher

Qi Yuan Wang

Aiping Chen

Shenjun Dai

Renchun Lin

Quanxing Zheng

Sabine Ackermann

Harald Heinzel

Achim Fischer

Wolfgang Böck

Ralf Mayer

Christoph Kaufmann

Andreas DÖRFLEIN

Karl-Günther SCHÜTZE

The invention relates to a catalyst containing alkali tungstate for the synthesis of alkylmercaptanes from alkanols and hydrogen sulphide, in addition to a method for the production of said catalyst, wherein the molar ratio of alkali to tungsten is &#x3c;2:1.

Catalysts containing tungstate for the synthesis of alkyl mercaptan and method for the production thereof

The invention relates to a halide-containing alkali tungstate catalyst for the synthesis of alkylmercaptans from alkanols and hydrogen sulfide, and to a process for the preparation of this catalyst.

Catalysts comprising halide-containing alkali tungstates for the synthesis of alkylmercaptan, and process for their preparation

The present invention relates to a process for continuously preparing methyl mercaptan from hydrogen sulphide and methanol in a direct connection with the preparation of hydrogen sulphide.

Process for preparing methyl mercaptan

A process for regenerating a catalyst used in the preparation of acrolein from glycerol, which comprises tungsten compounds and has acidic properties and at least one promoter.

Process for regenerating a catalyst

The present invention refers to a continuous process for the manufacture of methyl mercaptan using Mo&#x2014;O&#x2014;K-based catalysts. It is further described that the total selectivity of methylmercaptan can be increased by at least 1% by lowering the total gas hourly space velocity. The invention further refers to a process for the preparation of a solid, preformed catalyst system.

Process for the manufacture of methylmercaptan

The invention relates to a reaction vessel in which hydrogen sulphide is prepared from sulphur and hydrogen, wherein the reaction vessel consists partly or entirely of a material which is resistant to the reaction mixture, its compounds or elements and retains its resistance even at high temperatures.

Reaction vessel and process for its use

A process for preparing acrolein from glycerol using an acidic solid-state catalyst which comprises tungsten compounds and further promoters.

Catalysts and process for dehydrating glycerol

The invention relates to a catalyst containing alkali tungstate for the synthesis of alkylmercaptanes from alkanols and hydrogen sulphide, in addition to a method for the production of said catalyst, wherein the molar ratio of alkali to tungstan is &#x3c;2:1.

Catalysts containing tungstate for the synthesis of alkylmercaptane and method for the production thereof

The present invention refers to a catalyst for the manufacture of methyl mercaptan from carbon oxides comprising Mo and K compounds and oxides or sulfides of metals chosen from the manganese group. The improvement of the present process consists of the fact that carbon dioxide can be converted with higher conversions and selectivities to methyl mercaptan as compared to state-of-the-art technologies, with only minor amounts of carbon monoxide being formed as side product. Simultaneously, carbon monoxide can be easily converted into carbon dioxide and hydrogen by reaction with water using established water-gas-shift-technologies thus increasing the overall selectivity to methyl mercaptan.

Catalyst for the preparation of methyl mercaptan

The invention relates to an oxidic catalyst containing cesium and tungsten for the synthesis of alkyl mercaptans from alkanols and hydrogen sulfide, and to a process for the production of this catalyst, wherein the molar ratio of cesium to tungsten is &#x3c;2:1.

Catalyst for the synthesis of alkyl mercaptan and process for the production thereof

A process for continuously preparing methyl mercaptan by reacting a reactant mixture which contains a dialkyl sulphide and a dialkyl polysulphide with hydrogen sulphide to give methyl mercaptan.

Process for preparing methyl mercaptan from dialkyl sulphides and dialkyl polysulphides

The invention relates to a process for the production of 3-(alkylthio)propanal from glycerol using catalysts.

Production of 3- (alkylthio) propanal

The invention relates to a process for the continuous production of methylmercaptan by reacting a starting gas mixture of methanol and hydrogen sulphide in the gas phase at a reaction temperature between 200 and 600&#xb0; C. and an operating pressure of 1.5 to 40 bar on a catalyst in a multi-bed reactor.

Growing community of inventors

Münchsteinach, Germany

Hubert Redlingshöfer