Evonik Degussa Gmbh

Evonik Operations Gmbh

Covestro Deutschland Ag

Covestro Duetschland Ag

Imad Moussallem

Hartwig Rauleder

Juergen Erwin Lang

Ekkehard Mueh

Martin Trocha

Christian Renner

Andreas Bulan

Georg Markowz

Hans-Joachim Hasselbach

Nicole Brausch

Axel Ronneburg

Philipp Roth

Bernd Drapal

Peter Weuta

Jürgen Erwin Lang

Rüdiger Schütte

Judith Hierold

Timo Stahl

Norbert Schmitz

Min-Zae Oh

Jens Haubrock

Thorsten Schwaertzke

Daniel Sudhoff

Danny De Corte

Thomas Turek

Ekkehard Müh

Juliette Halli

Tobias Winkler

Johannes Wefer

Christian Rückriegel

Petra Picha

Ulf Bindernagel

Christian RÜCKRIEGEL

Thorsten SCHWÄRTZKE

The invention relates to a single cycle process for preparing D,L-methionine from an alkali methioninate solution obtained by alkaline hydrolysis of 5-(2-methylmercaptoethyl)hydantoin, in which the D,L-methionine is obtained by neutralizing the alkali methioninate solution with carbon dioxide at elevated temperature and subsequently crystallizing D,L-methionine in the presence of seed crystals.

Process for the preparation of D,L-methionine

The present invention pertains to a method for producing methionine or salts or derivatives thereof from hydrogen cyanide (HCN), the method comprising a step of producing 2-hydroxy-4-(methylthio)butyronitrile (MMP-CN), or a crude product mixture comprising MMP-CN, by contacting a hydrogen cyanide (HCN) process gas mixture prepared according to the Andrussow process from methane, ammonia and oxygen, with 3-methylmercaptopropionaldehyde (MMP), wherein the HCN process gas mixture is obtained from the crude HCN process gas mixture by adjusting the amount of ammonia to between 20% (v/v) and 60% (v/v) of the amount of the ammonia in the crude HCN process gas mixture.

Method for producing methionine

The present invention pertains to a process for preparing 3-hydroxy-3-methylbutyric acid (HMB) or a salt thereof, the method comprising (a) reacting isobutylene oxide with cyanide in order to obtain 3-hydroxy-3-methylbutyronitrile, and (b) hydrolyzing the 3-hydroxy-3-methylbutyronitrile obtained in step (a) in order to obtain HMB, wherein hydrolysis step (b) is performed using either at least one nitrilase enzyme or, alternatively, using a combination of enzymes, said combination comprising at least one nitrile hydratase and at least one amidase.

Process for preparing 3-hydroxy-3-methylbutyric acid (HMB) and salts thereof

An apparatus for chlor-alkali electrolysis, comprising a cathode half-cell, an oxygen-consuming electrode arranged therein, a conduit for supply of gaseous oxygen to the cathode half-cell and a conduit for purging the cathode half-cell with inert gas, enables the flexible use of power by a method in which chlorine is produced in the apparatus by chlor-alkali electrolysis, wherein, when power supply is low, the oxygen-consuming electrode is supplied with gaseous oxygen, and oxygen is reduced at the oxygen-consuming electrode at a first cell voltage, and when power supply is high, the oxygen-consuming electrode is not supplied with any oxygen, and hydrogen is generated at the cathode at a second cell voltage which is higher than the first cell voltage.

Device and method for the flexible use of electricity

A controlled preparation of octachlorotrisilane and higher polychlorosilane such as DCTS and DCPS from monomeric chlorosilane, proceeds by exposing the chlorosilane to a nonthermal plasma and recycling chlorosilane that has not been converted to octachlorotrisilane into the plasma.

Process for preparing octachlorotrisilane and higher polychlorosilanes with utilization of hexachlorodisilane

The invention relates to a process and an apparatus for preparation of polychlorosilanes from monomeric chlorosilanes, by subjecting the chlorosilanes to a thermal plasma.

Method and device for producing polychlorosilanes

The invention relates to a process and an apparatus for controlled preparation of octachlorotrisilane from monomeric chlorosilanes, by subjecting the chlorosilanes to a thermal plasma.

Process and apparatus for preparation of octachlorotrisilane

The present invention relates to a continuous process for hydrogenating halogen-containing silane compounds having at least three silicon atoms, in which at least one halogen-containing silane compound having at least three silicon atoms and at least one hydrogenating agent are converted continuously to form at least one hydridosilane compound having at least 3 silicon atoms and oxidized hydrogenating agent, and wherein oxidized hydrogenating agent is withdrawn and reduced, and the reaction product of this reduction reaction is sent back to the hydrogenation, to the hydridosilane compounds obtainable by this process and to the use thereof.

Method for hydrogenating higher halogen-containing silane compounds

A multilayer oxygen consuming electrode having a side facing the oxygen-containing gas and a side facing the alkaline electrolyte, wherein the electrode includes at least one support, and at least two layers containing a catalyst and a hydrophobic material, wherein the outermost layer facing the gas side has a lower proportion of catalyst than the outermost layer facing the electrode side and wherein the proportion of hydrophobic material is not more than 8% by weight based on the total amount of the catalyst the hydrophobic material.

Oxygen-consuming electrode with multilayer catalyst coating and process for the production thereof

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Hanau, Germany

Imad Moussallem