Evonik Degussa Gmbh

Evonik Operations Gmbh

Evonik Oxeno Gmbh & Co. Kg

Jörg Schallenberg

Guido Stochniol

Stephan Peitz

Dietrich Maschmeyer

Helene Reeker

Robert Franke

Dirk Fridag

Katrin Marie Dyballa

Frank Geilen

Armin Matthias Rix

Markus Winterberg

Horst-Werner Zanthoff

Holger Wiederhold

Reiner Bukohl

Ron Postma

Prasad Muppa

Stefan Bernhardt

Harald Häger

Lena Altmann

Andreas Wolff

Jürgen Stock

Bart Van Den Berg

Ted M Pettijohn

Hans Rausch

Oliver Markus Busch

Matthias Leipold

Shahbaz Naeem

Stephen Bowers

Hans-Martin Rausch

Judith Scholz

Bart B Van Den Berg

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

A process is used for oligomerizing C2- to C8-olefins in several reaction stages in which the starting mixture and the respective outputs from the reaction stages are separated and are fed to different reaction stages.

Process for oligomerizing olefins with streams having a reduced olefin content

The invention is concerned with the production of 1-hexene and octenes from ethene. 1-Butene is optionally also to be produced. The problem addressed by the present invention is that of developing a process for producing 1-hexene from ethene by MTHxE etherification to achieve better chemical utilization of the employed carbon atoms. This problem is solved by catalytic retrocleavage of MTHxE into the Colefins and the alcohol, reuse of the alcohol in the etherification and reaction of the obtained Colefins with ethene to afford Colefins. In this way the alcohol is not lost from the process but rather is internally recirculated as a derivatizing agent. The less attractive Colefins from the cleavage product are upgraded to octene with further ethene in order to provide a further commercial product.

Production of at least 1-hexene and octene from ethene

The disclosure describes the oligomerization of supercritical ethene. An essential aspect of the invention is that of mixing ethene with an inert medium and setting the conditions in the reaction such that both ethene and the inert medium are supercritical. This is because the solubility for ethene in the inert medium is greater in the supercritical state, such that more ethene is dissolved in the supercritical inert medium than in a liquid solvent. The process regime in the supercritical state therefore enables the use of a much higher proportion of ethene in a homogeneous mixture of ethene and inert medium than is possible on the basis of the thermodynamic solubility restriction in a purely liquid hydrocarbon stream. In this way, the space-time yield is distinctly enhanced. Since a greater amount of ethene can be passed into the reactor, it is possible as a result to better exploit the apparatus volume compared to a liquid phase process. The inert medium used may, for example, be isobutane.

Oligomerization of ethene in supercritical mode

The invention relates to a process for preparing an ester mixture, in which an n-butene-containing feed mixture having a composition which changes over time is first oligomerized and then converted by hydroformylation, hydrogenation and esterification to an ester mixture. In this process, an approximation of the actual viscosity of the ester mixture is determined. The problem that it addresses is that of specifying a comparatively simple process which enables conversion of an n-butene with a variable composition over time to an ester mixture having a viscosity which can be kept very substantially constant over a long period even when an inconstant Csource which delivers fluctuating qualities over this period is utilized. This is achieved through controlled use of a second raw material, namely ethene. It has been found that the viscosity of n-butene-based ester mixtures can be influenced by controlled use of ethene in the preparation of the ester precursors. Specifically, the invention proposes two measures by which the ethene can be used: either directly as Colefin or as Colefin after prior separate oligomerization.

Influencing the viscosity of N-butene-based ester mixtures by controlled use of ethene in the preparation of the ester precursors

Apparatus and processes are provided for forming epoxide compounds. In one embodiment, a process for the manufacture of an epoxide is provided including adding an oxidant, a water-soluble manganese complex and a terminal olefin to form a multiphasic reaction mixture, reacting the terminal olefin with the oxidant in the multiphasic reaction mixture having at least one organic phase in the presence of the water-soluble manganese complex, separating the reaction mixture into the at least one organic phase and an aqueous phase, and reusing at least part of the aqueous phase. The invention is also related to a device for performing the above process.

Process for the manufacture of a 1,2-epoxide and a device for carrying out said process

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Dorsten, Germany

Jörg Schallenberg