Evonik Degussa Gmbh

Thyssenkrupp Industrial Solutions Ag

Goldschmidt Gmbh

Evonik Operations Gmbh

Evonik Goldschmidt Corporation

Litarion Gmbh

Thyssenkrupp Uhde Gmbh

Matthias Pascaly

Michael Ferenz

Christian Weitemeyer

Christian Hying

Holger Leidreiter

Sebastian Imm

Rolf-Walter Terwonne

Robert Jahn

Franz Schmidt

Jürgen Stock

Hans Henning Wenk

Burghard Gruning

Philippe Favresse

Bernd Jaeger

Peter Schwab

Peter Kress

Wolfgang Wöll

Tobias Maurer

Hans-Jürgen Köhle

Burghard Gruening

Burghard Grüning

Hans-Juergen Koehle

Marc Brendel

Michael Hagemann

Gerhard Hörpel

Manfred Bärz

Andrea Heinroth

Johan Anton

Günter Latoschinski

Maik Bernhard

Roy Van Hal

Jürgen Schemel

Hans-Christian Dietz

Stefan Wieland

Marc Uerdingen

Tim Pöpken

Michael Dopfer

Erika Messinger

Heiko Morell

Nico Dauth

Kathrin John

Astrid Zuendorff

Claus Hilgers

Dietrich Maass

Dietrich Maaβ

Dieter Buβ

Joao André

Sören Götz

Uwe Breitenbach

Jürgen Neuroth

Brigitte Mess

Witold Friedemann Rex

Michael Kube

Hans-Martin Rausch

Thomas Noll

Henrik Hahn

Georg Schick

Martin Schuster

Armin Modlinger

Stefan Wildmoser

Witold Friedeman Rex

The present invention relates to a process for preparing a pulverulent, porous crystalline metal silicate, comprising the following steps:

Production of pulverulent, porous crystalline metal silicates by means of flame spray pyrolysis

In a process for the epoxidation of an olefin with hydrogen peroxide in the presence of a solvent, where a mixture comprising olefin, an aqueous hydrogen peroxide solution and a solvent is continuously passed through a fixed bed of an epoxidation catalyst comprising a titanium zeolite, addition of a chelating agent to the aqueous hydrogen peroxide solution before mixing it with solvent reduces or prevents formation of deposits on the catalyst and blocking of orifices of a liquid distributor.

Process for the epoxidation of an olefin

In a process for the epoxidation of an olefin by continuously reacting the olefin with hydrogen peroxide in a methanol solvent on a fixed bed epoxidation catalyst comprising a titanium zeolite, the hydrogen peroxide is used as an aqueous hydrogen peroxide solution made by an anthraquinone process, the aqueous hydrogen peroxide solution is mixed with methanol to give a feed mixture and this feed mixture is filtered before being contacted with the fixed bed epoxidation catalyst.

In the method for the epoxidation of an olefin, the olefin is continuously reacted with hydrogen peroxide in a mixed reactor in the presence of a water soluble epoxidation catalyst, comprising a manganese complex, the reaction is carried out in a reaction mixture comprising an aqueous liquid phase and an organic liquid phase with mixing of the liquid phases, reaction mixture is continuously withdrawn from the mixed reactor and separated into a separated aqueous phase and a separated organic phase, and part of the separated aqueous phase is continuously recycled into the mixed reactor, with the combined hold-up time of aqueous phase in withdrawing, separating phases and recycling aqueous phase being kept at less than 15 minutes.

Method for the epoxidation of an olefin with hydrogen peroxide

In a process for the epoxidation of propene, comprising the steps: reacting propene with hydrogen peroxide in the presence of a titanium silicalite catalyst and a methanol solvent; separating non-reacted propene and propene oxide from the resulting reaction mixture to provide a solvent mixture comprising methanol and water in a combined amount of at least 90% by weight; and feeding this solvent mixture as a feed stream to a continuously operated methanol distillation column at a feed point in the middle section of said column to provide an overhead product comprising at least 90% by weight methanol and a bottoms product comprising at least 90% by weight water; the addition of a liquid defoamer, having a solubility in the feed stream of less than 10 mg/kg at 25&#xb0; C. and a surface tension at the liquid air interface of less than 22 mN/m at 20&#xb0; C., at or above the feed point in an amount exceeding the solubility of the liquid defoamer in the feed stream suppresses foam formation in the methanol distillation column.

Process for the epoxidation of propene

Epoxidation of an olefin is carried out by continuously reacting the olefin with hydrogen peroxide in the presence of a water soluble epoxidation catalyst, comprising a manganese complex, in a reaction mixture comprising an aqueous liquid phase and an organic liquid phase using a loop reactor with mixing of the liquid phases, and during the reaction the concentration of hydrogen peroxide in the aqueous liquid phase is maintained at less than 1.0% by weight.

The present invention relates to a membrane comprising a flat, flexible substrate having a plurality of openings and having a porous inorganic coating situated on and in said substrate, the material of the substrate being selected from woven or non-woven, electrically non-conductive fibers, characterized in that the substrate comprises polyaramide fibers that are pure or connected to fibers of the further polymer or at least of one of these further polymers, wherein the fibers of at least one of said further polymers comprise a melting point that is lower than the decomposition point of the polyaramide fibers.

Ceramic membrane having support materials comprising polyaramid fibers and method for producing said membranes

The invention relates to a process for producing a separator comprising the steps of: providing a sheetlike porous substrate, a solvent, ceramic particles and an adhesion promoter; preparing a slip by mixing the solvent, the adhesion promoter and the ceramic particles; coating the substrate with the slip and thermally drying the coated substrate to obtain the separator. The problem addressed is that of specifying a process useful for producing separators having a higher ceramic content. The problem is solved when the solvent used is a mixture of water and at least one organic component; the adhesion promoter used is a mixture of silanes and at least one thermally crosslinkable acrylic polymer; the slip is admixed with a carboxylic acid preparation and also with a defoamer component free from silicone oil.

Separator comprising an organic-inorganic adhesion promoter

The invention describes novel silicone-containing graft copolymers and processes for their preparation. In particular, it relates to silicone-containing graft copolymers P, which are obtained by grafting olefinic monomers M onto polyether-containing radicals of polyoxyalkylene-polysiloxane block copolymers S with (AB)structure.

Silicone-containing graft copolymers of blockwise structure

The invention relates to polysiloxanes containing guanidino groups for which the guanidino groups can be combined arbitrarily with other functional groups on the polysiloxane backbone according to the general formula (I) 

Siloxanes containing guanidino groups and use thereof for cosmetic formulations

The invention relates to UV-light-absorbing quaternary polysiloxanes in which quaternary groups and UV-absorbing radicals can be mixed independently of one another according to the general formula (I) 

UV-light-absorbing quaternary polysiloxanes

The invention relates to a process for preparing alkylpolyglycosides from monomeric glycosides, oligo- or polyglycosides and alcohols according to the general scheme(Glyc-O)H+R&#x2014;OH&#x2192;(Glyc-O)Rwhere

Process for preparing alkylglycosides

The invention provides a process for preparing amino acid esters and/or their acid addition salts from monomeric or polymeric amino acids, peptides, proteins and alcohols, which comprises carrying out the reaction in supercritical alcohols, preferably at pressures and temperatures which are at least 5% above the critical parameters, the alcohols serving both as the solvent and as reactants.

Process for preparing amino acid esters and their acid addition salts

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Frankfurt-am-Main, Germany

Matthias Pascaly