Uhde Gmbh

Thyssenkrupp Industrial Solutions Ag

Thyssenkrupp Uhde Gmbh

Sascha Wenzel

Max Heinritz-Adrian

Johannes Menzel

Helmut Gehrke

Oliver Noll

Muhammad Iqbal Mian

Natarajan Thiagarajan

Rolf Schwass

The invention relates to a method for dehydrating alkanes, wherein the alkane is guided in a reactor for the dehydrogenation of alkanes via a catalyst, and the process may be carried out adiabatically or non-adiabatically, and the catalyst for dehydration can be regenerated after the reaction phase by means of transferring a gas, wherein said gas is guided via the catalyst after a short rinsing phase using water vapor, and said regeneration gas consists of a gas containing oxygen and of steam, and after regeneration the catalyst is freed of the gas containing oxygen by transferring steam, wherein the duration of the transfer of a gas containing oxygen is significantly reduced as compared to common methods and represents 70% or less of the total regeneration time, and the catalyst has an increased selectivity for forming alkene by means of carrying out the regeneration at a constant activity, and the catalyst is comprised of a metal of the group of platinum metals or group VIB of the periodic table of the elements, which is applied to a carrier in form of a compound or in elementary form, which substantially consists of oxides of the elements of tin, zinc, or aluminum.

Regeneration of catalysts for dehydrating alkanes

The invention relates to a method for producing unsaturated hydrocarbons. According to said method, in a first step, a hydrocarbon, especially a mixture which contains alkanes, essentially no water, and can contain water vapour, is continuously guided through a first catalyst bed provided with standard dehydration conditions. Liquid water, water vapour and a gas containing oxygen are then added to the reaction mixture obtained in the first step and, in a second step, the reaction mixture obtained is then continuously guided through another catalyst bed for oxidising hydrogen and for further dehydrating hydrocarbons. The first catalyst bed can be heated and the heating in the first step is then preferably regulated in such a way that an essentially isothermic operating mode is created.

Method for catalytically dehydrating hydrocarbons

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Bochum, Germany

Sascha Wenzel