Consortium F&uuml;r Elektrochemische Industrie Gmbh

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Consortium Fur Elektrochemische Industrie Gmbh

Hans-J&uuml;rgen Eberle

Christoph R&uuml;dinger

Dirk Groke

Ulrich Wecker

Harald Voit

Michael Hallmann

Richard Bosch

Norbert Zeitler

Mehmet G&uuml;naltay

Karl-Heinz Stocksiefen

Barbara Reil

Stefan Trinkhaus

Joachim Lotz

Olaf Helmer

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 is for producing monolithic substrate catalysts and for their use in the gas phase oxidation of hydrocarbons. The catalysts are obtained by coating the catalyst substrate with a suspension that includes a catalytically active compound and one or more surfactants of the general formula R Y X. R represents the hydrophobic part of the surfactant, with n being 1, 2 or 3. Y represents the hydrophobic part of the surfactant, with m being 0, 1, 2, or 3 and X represents the hydrophilic head group of the surfactant.

Methods of producing monolithic oxidation catalysts and their use in gas phase oxidation of carbohydrates

The invention relates to supported catalysts consisting of an active material on an inert support in the shape of rings, wherein the rings have one or more notches in the upper and/or lower flat side of the ring.

Supported catalysts and their use in the gas-phase oxidation of hydrocarbons

A method is provided for producing catalysts useful for synthesizing maleic anhydride by oxidizing saturated and/or unsaturated C hydrocarbons. A vanadium (V) compound is reacted with a mixture of phosphorous and phosphoric acids in a particular ratio, in a solvent mixture containing a structure former, and an entrainer and where the water of reaction together with entrainer is distilled off and the resulting precursor is subjected to calcination.

Method for producing catalysts for synthesizing maleic anhydride by means of gas phase oxidation

Growing community of inventors

München, Germany

Hans-Jürgen Eberle

Growing community of inventors

München, Germany

Hans-J&uuml;rgen Eberle

Hans-Jürgen Eberle