Wacker Chemie Ag

Consortium Fur Elektrochemische Industrie Gmbh

Consortium F&uuml;r Elektrochemische Industrie Gmbh

Harald Voit

Richard Weidner

Jochen Dauth

Michael Hallmann

Christoph R&uuml;dinger

Steffen Dörrich

Mehmet G&uuml;naltay

Martin Petri

Erich Schaffer

Jürgen Stohrer

Dominik Jantke

Jan Tillmann

Fridolin Stary

Hans-J&uuml;rgen Eberle

Steffen Doerrich

Christoph Rüdinger

Hans-Jürgen Eberle

Verena Geiger

Barbara Geborene Ne&eacute; Reil Wild

Hans J&uuml;rgen Eberle

Sebastian Suckow

Sefer Ay

Barbara Reil

Markus Ulbrich

Steffen DÖRRICH

The invention relates to spherical, nonporous Silicon particles having average particle sizes (d) of 1 to 10 pm and a silicon content of 97 to 99.8 wt. %, the silicon content relating to the total weight of the silicon particles minus any oxygen content.

Silicon particles for anode materials of lithium ion batteries

The invention provides circular processes using siloxanes as high-temperature heat transfer fluid (HTF), wherein the siloxanes go over from the state of the supercooled liquid into the state of the high-density supercritical fluid by means of heat uptake without a phase transition and energy is then transferred as energy without a phase transition.

Recycle processes with supercritical siloxanes

The invention provides a process for removal of gaseous decomposition products from high temperature heat transfer fluid HTF of an operational solar thermal power plant having an HTF circuit,

Composite heat insulation system

A process for preparing saturated carboxylic acids having from one to four carbon atoms by gas-phase oxidation, includes reacting 2-butanone with oxygen over a coated catalyst which is an inert nonporous support body and a catalytically active mixed oxide composition comprising (a) one or more oxides selected from the group consisting of titanium dioxide, zirconium dioxide, tin dioxide and aluminum oxide, and (b) from 0.1% to 1.5% by weight, based on the weight of the component (a) and per m/g of specific surface area of the component (a), of vanadium pentoxide, applied to the external surface of the support body.

Process for preparing saturated carboxylic acids having from one to four carbon atoms by gas-phase oxidation of 2-butanone

The invention relates to a method for separating and purifying an aqueous mixture that mainly consists of acetic acid, formic acid and high-boiling substances by extraction with a solvent in a cyclic process. The inventive method is characterized in that the flow of raffinate is fed to a solvent stripping column ( ) with the major part of the water in order to remove the water from the cycle. The flow of extract is fed to a solvent recovery distillation column ( ). In a first step, a mixture (A) that consists of water and solvent, is separated by overhead distillation. A mixture (B) that consists of acetic acid, formic acid and high-boiling substances is separated via a sump. Once the formic acid is removed in a column ( ), mixture (B) is separated in an acetic acid distillation column to give pure acetic acid and high-boiling substances. Mixture (A) is fed to a phase separator and the aqueous phase is returned to the solvent stripping column ( ) together with any residual portions of the solvent while the organic phase is returned to the extractor ( ).

Method for separating and purifying an aqueous mixture that mainly consists of acetic acid and formic acid

A method for the separation and purification of an aqueous mixture of main components, namely acetic acid and formic acid and non-volatiles by extraction, uses a solvent in a circulatory system. A raffinate stream is mixed with the larger proportion of water from a solvent stripper column ( ) for the removal of water. The extraction stream is introduced into a solvent distillation column ( ), from which in a first step involving the use of a mixture (A) containing a larger proportion of the solvent is separated out via a header and a mixture (B) of formic acid, water and solvent is separated out via a side offtake and a mixture (C) of acetic acid and non-volatiles is also separated out. A mixture (B) is introduced into a formic acid distillation column ( ) for further processing, and a mixture (C) is introduced into an acetic acid distillation column ( ), and purified acetic acid is subsequently isolated in the acetic acid distillation column ( ) from the header. Pure formic acid is isolated at the settling basin of the formic acid distillation column ( ).

Method for the separation of and purification of an aqueous mixture consisting of the main components acetic acid and formic acid

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Reischach, Germany

Harald Voit