Evonik Degussa Gmbh

Evonik Stockhausen Gmbh

Oxeno Olefinchemie Gmbh

Udo Knippenberg

Guido Stochniol

Franz Nierlich

Markus Winterberg

Franz-Felix Kuppinger

Jürgen Mosler

Franck Furno

Günther Bub

Andreas Sabbagh

Jörg Sauer

Jörg Leistner

Thorsten Schwärtzke

Günter Latoschinski

Alfred Kaizik

Wilfried Bueschken

Armin Matthias Rix

Manfred Neumann

Dirk Roettger

Cornelia Borgmann

Rolf Schneider

Stephan Wieber

Ralf Meier

Matthias Seiler

Andreas Beckmann

Nicole Brausch

Stefan Nordhoff

Volker Brehme

Jörn Rolker

Johannes Ruwwe

Rainer Malzkorn

Muhammad Irfan

Jens Haubrock

Joerg Krissmann

Thorsten Schwaertzke

Kerstin Kaemper

Joerg Zoellner

Ralf Duessel

Kai-Martin Krüger

Hari Prasad Mangalapally

Jörg Zöllner

Kai-Martin Krueger

Michael Bernd Fricke

Dr Jörg Leistner

The invention is directed to a method for separating acid gases from a gas mixture in which the gas mixture is contacted with an absorption medium which comprises water and at least one amine and has a phase-separation temperature in the range from 0 to 130&#xb0; C. In addition, the invention is directed to a device which can be used for carrying out this method.

Method and device for separating acid gases from a gas mixture

The present invention relates to a process for preparing hydridosilanes from halosilanes, in which a) i) at least one halosilane of the generic formula SiX(where n&#x2267;3 and X=F, Cl, Br and/or I) and ii) at least one catalyst are converted to form a mixture comprising at least one halosilane of the generic formula SiX(where m&#x3e;n and X=F, Cl, Br and/or I) and SiX(where X=F, Cl, Br and/or I), and b) the at least one halosilane of the generic formula SiXis hydrogenated to form a hydridosilane of the generic formula SiH, the hydridosilane of the generic formula SiHis separated from partially halogenated hydridosilanes of the general formula SiHX(where 1&#x3c;y&#x3c;2m+1), and the separated partially halogenated hydridosilanes of the general formula SiHX(where 1&#x3c;y&#x3c;2m+1) are hydrogenated again.

Process for preparing hydridosilanes

The present invention relates to superabsorbent polymer comprising acrylic acid made by the process comprising the steps of heating an aqueous glycerine solution to form glycerine; transporting the glycerine to the dehydration reactor; dehydrating the glycerine to an acrolein-comprising dehydration product; gas phase oxidating of the acrolein-comprising dehydration product to obtain an acrylic acid-comprising monomer gas; bringing into contact of the monomer gas with a quench agent to obtain an acrylic acid-comprising quench phase; working-up the quench phase to obtain an acrylic acid-comprising monomer phase; and polymerizing the acrylic acid-comprising monomer phase; wherein a plurality of gas bubbles is generated and wherein the dehydration occurs at least partially in the liquid phase. The superabsorbent polymer has certain properties for biodegradability and sustainability. Further, at least about 25% of the acrylic acid is based on glycerine. The superabsorbent polymer has a sustainability factor of at least about 80%.

Water-absorbing polymer structures based on renewable raw materials and process for their production by dehydration

The present invention relates to a process for production of acrylic acid, comprising the steps of a) dehydration of glycerine to an acrolein-comprising dehydration product; b) gas phase oxidation of the dehydration product to obtain an acrylic acid-comprising monomer gas; c) bringing into contact of the monomer gas with a quench agent to obtain an acrylic acid-comprising quench phase; and d) work-up of the quench phase to obtain an acrylic acid-comprising monomer phase; whereby, during the dehydration a liquid phase a1 and a gas phase a2 is present, whereby in the liquid phase a1 a plurality of gas bubbles is generated, as well as a process for production of polymers by polymerization of acrylic acid, preferably for production of water-absorbing polymers, the water-absorbing polymers obtainable by this process, a composite, a process for production of a composite, the composite obtainable by this process, and further chemical products.

Acrylic acid and water-absorbing polymer structures based on renewable raw materials and process for their production by dehydration

The invention relates to a process for preparing an alcoholic solution of an alkali metal alkoxide from alkali metal hydroxide and alcohol in a reaction column, the alcohol and the alkali metal hydroxide being conducted in countercurrent, which is characterized in that a reflux ratio of at least 0.05 is established in the reaction column.

Process for preparing alkali metal alkoxides

The invention relates to a process by which C- to C-olefins or an essentially sulfur-free olefin cut comprising C- to C-olefins is isomerized over a catalyst comprising an element of the eighth transition group of the Periodic Table, in the presence of at least one added sulfur compound, and any polyunsaturated hydrocarbons contained therein are selectively hydrogenated and hydroisomerized, and also the sulfur compounds are separated from the product and optionally recycled, so that virtually sulfur-free products are obtained.

Hydroisomerization of olefins comprising between 4 and 6 carbon atoms

The invention relates to a process for preparing 1-octene from a Cfraction from a cracker by telomerization of the 1,3-butadiene present in the Cfraction from a cracker by means of methanol in the presence of a catalyst, hydrogenation of the telomer obtained in this way, dissociation of the hydrogenated telomer and work-up of the resulting dissociation product to give pure 1-octene.

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Marl, Germany

Udo Knippenberg