Evonik Degussa Gmbh

Degussa Aktiengesellschaft

Jan-Olaf Barth

Christoph Weckbecker

Klaus Huthmacher

Hubert Redlingshöfer

Qi Yuan Wang

Aiping Chen

Yiquan Yang

Shenjun Dai

Weiping Fang

Caspar-Heinrich Finkeldei

Hubert Redlingshoefer

Hongbin Zhang

Sabine Ackermann

Renchun Lin

Youzhu Yuan

Quanxing Zheng

Xingguo Yan

Hans Joachim Hasselbach

Horst-Werner Zanthoff

Stephan Kretz

Johannes Lercher

Harald Heinzel

Achim Fischer

Qiaoling Li

Ralf Mayer

Lingmei Yang

Yingjuan Hao

Christoph Kaufmann

Qi Wang

The invention relates to a process for continuously preparing methyl mercaptan by reacting a mixture comprising carbon compounds with sulfur and hydrogen, wherein the carbon disulfide and hydrogen sulfide compounds which form are subsequently converted to methyl mercaptan.

Process for continuously preparing methyl mercaptan from carbon compounds, sulfur and hydrogen

This invention is related to a preparation method of a supported catalyst Mo&#x2014;O&#x2014;K-MeOfor the synthesis of methanethiol from HS-containing syngas. The catalyst comprises of an active component of Mo&#x2014;O&#x2014;K-based species, an active promoter and a support denoted as metal (or metals)-carrier. The support is prepared by electroless plating method in such a way that the metal or metals chosen are plated onto the surface of the carrier. Transition metal, especially Fe, Co or Ni are selected to be the plating metal, while SiO, AlOor TiOare selected to be carrier. The catalyst thus prepared is found to be efficient for the synthesis of methanethiol from HS-containing syngasor carbon oxides/hydrogen mixtures, especially regarding a minor formation of the by-product CO.

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A method is described to prepare a Mo containing supported catalyst comprising TeOas active promoter and a process for preparing methanethiol in the presence of said catalyst.

Mo containing catalyst, a preparation method and a method for preparing methyl mercaptan

Provided is a process for continuously preparing methyl mercaptan by reacting a reactant mixture comprising solid, liquid and/or gaseous carbon- and/or hydrogen-containing compounds with air or oxygen, and/or water and sulfur.

Process for continuously preparing methyl mercaptan from carbon- and hydrogen-containing compounds

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

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

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.

Process for the continuous production of methylmercaptan

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Frankfurt-am-Main, Germany

Jan-Olaf Barth