Evonik Degussa Gmbh

Evonik Operations Gmbh

Evonik Industries Ag

Evonik Oxeno Gmbh & Co. Kg

Andreas Wolff

Stephan Peitz

Guido Stochniol

Armin Matthias Rix

Markus Winterberg

Reiner Bukohl

Dietrich Maschmeyer

Frank Geilen

Thomas Quandt

Helene Reeker

Jörg Schallenberg

Stefan Röder

Joerg Schallenberg

Matthias Leipold

Jorg Schallenberg

The present invention provides a two-stage process for removing polyunsaturated hydrocarbons from C4 hydrocarbon streams that, in addition to C4 hydrocarbons, also contain C5 hydrocarbons and mercaptans and/or disulfides.

Process for removing polyunsaturated hydrocarbons from C4 hydrocarbon streams in the presence of mercaptans, disulfides and C5 hydrocarbons

The invention relates to a catalyst for a process for removing mercaptans and optionally disulfides (if present) from hydrocarbon streams, in particular C4 streams, in the presence of higher dienes, in particular C5 dienes. At the same time, the invention also relates to a process for removing mercaptans and disulfides (if present) from hydrocarbon streams, in particular C4 streams, in one embodiment in the presence of 1-butene, by thioetherification of the mercaptans with polyunsaturated hydrocarbons, wherein the process is carried out in a reactor with addition of hydrogen in the presence of higher dienes, in particular Cdienes.

Catalyst and process for removing mercaptans from hydrocarbon streams

The object of the invention is to specify a process with which both Cand Caldehydes can be produced economically. Here, the process should be able to to be supplied with the lowest possible dependence on raw material suppliers and also should be able to react flexibly to fluctuations in demand with respect to Cand Caldehydes. The use of resources should also be optimized. The process proposed uses LPG or NGL as raw material. The process according to the invention essentially differs from known LPG-based processes in that the intermediate obtained, after dehydrogenation and removal of by-products, is divided into two portions. C9 aldehyde is produced from the first portion by oligomerization and hydroformylation while C5 aldehyde is obtained by hydroformylation of the second portion. This has the critical advantage that it is possible to divide the intermediate flexibly into the two portions so that either more Cor more Caldehydes can be produced depending on the respective demand.

Dehydrogenation of LPG or NGL and flexible utilization of the olefins thus obtained

The invention relates to a method for the thioetherification of mercaptanes with polyunsaturated hydrocarbons, carried out in a reactor with the addition of hydrogen, using a heterogenic catalyst and in the presence of 1-butene. The aim of the invention is to develop such a method to the extent that the creation of value from the Craw material stream is increased. Said aim is achieved in that the hydrogen is added to the reaction in such a manner that the molar ratio of hydrogen to polyunsaturated hydrocarbons is no more than one.

Thioetherification of mercaptanes in C4 hydrocarbon mixtures

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Recklinghausen, Germany

Andreas Wolff