Consortium Fur Elektrochemische Industrie Gmbh

Wacker Chemie Ag

Industrie Gmbh

Hans-Jurgen Eberle

Johann Weis

Roland Heidenreich

Torsten Gottschalk-Gaudig

Helmut Gebauer

Gerhard Schmid

Werner Wagner

Frank Muller

Ludwig Maier

Franz Grundei

Guido Wenski

Joachim Pohl

Georg Meixner

Norbert Zeitler

Christine Csellich

Shaped bodies with good strength properties are prepared from pyrogenic metal oxide(s) by suspending the metal oxide(s) in a liquid, milling to activate the metal oxide particles, forming an activated homogenous suspension, coagulating the suspension, and forming shaped bodies therefrom.

Method for producing stable, high-purity molded bodies from pyrogenic metal oxides without the addition of binders

Especially physically stable metal oxide catalyst supports are prepared by suspending a metal oxide in a continuous phase, activating by fine dispersion, coagulation to a viscoelastic mass, shaping, drying, and calcining. The catalyst support thus prepared may be treated with catalytic agents to produce supported catalysts for olefin oxidation.

Method for producing catalysts and their use for the gas phase oxidation of olefins

The invention relates to a process for preparing pyromellitic dianhydride (PMDA) by heterogeneously catalyzed oxidation in the gas phase by means of a gas containing molecular oxygen. The process involves oxidizing benzaldehydes which are 2,4,5-trialkylated by C.sub.1 - to C.sub.3 -alkyl groups or mixtures of benzaldehydes which are 2,4,5-trialkylated by C.sub.1 - to C.sub.3 -alkyl groups and benzenes which are 1,2,4,5-tetraalkylated by C.sub.1 - to C.sub.3 -alkyl groups in the presence of a catalyst. The catalyst contains as active components 5% to 95% by weight of one or more transition-metal oxides of sub-group IV of the Periodic Table of the Elements, from 1% to 50% by weight of one or more transition-metal oxides of sub-group V of the Periodic Table of the Elements. The catalyst also contains from 0% to 10% by weight of one or more oxides of elements of main group I of the Periodic Table of the Elements and/or from 0% to 50% by weight of one or more oxides of elements of main groups III, IV and V of the Periodic Table of the Elements and of elements of sub-groups VI and VII of the Periodic Table of the Elements. The indicated percentages by weight are based in each case on the total weight of the active components and add to 100% by weight.

Process for preparing pyromellitic dianhydride

The invention relates to cycloolefinic complexes of platinum, processes for preparing the same from platinum(II) compounds and cyclolefins having at least 12 ring carbon atoms and at least two aliphatic non-cumulated carbon-carbon double bonds and their use as a catalyst for the addition of Si-bonded hydrogen to an aliphatic multiple bond.

Cycloolefinic complexes of platinum, processes for preparing the same

A process for preparing cyclooctaamylose by enzymatic cleavage of an aqueous preparation of starch in the presence of a complexing agent is disclosed. As a selective complexing agent for cyclooctaamylose, a compound of the formula I is employed. ##STR1## in which A, B, D and E, independently of one another, represent ##STR2## (R=hydrogen, alkyl, hydroxyl, alkoxy or carboxyl radical), and m, n, o and p are within the limits 0 to 20, with the proviso that the number of atoms forming the ring is within the limits from 13 to 24. The compounds prepared by the process of the invention are useful in the medicaments sector, in crop protection and cosmetics, or in the foodstuffs industry.

Process for preparing cyclooctaamylose

The compound 16-oxa-bicyclo-[13.1.0]-hexadec-7-ene, and a process for its production, having the structural formula: ##STR1## is disclosed. 16-oxa-bicyclo-[13.1.0]-hexadec-7-ene is useful as a fragrance and may be produced by reacting cyclopentadeca-1,8-diene in the presence of an organic peracid.

16-Oxa-bicyclo-[13.1.0]-hexadec-7-ene and its application as a fragrance

Growing community of inventors

Munich, Germany

Hans-Jurgen Eberle