Hoechst Aktiengesellschaft

Clariant Corporation

Hoechst Schering Agrevo Gmbh

Hoechstaktiengesellschaft

Hoechst Research & Technology Deutschland Gmbh & Co. Kg

Bernd Scharbert

Ahmed M Tafesh

Matthias Beller

Richard Walter Fischer

Rainer Bohner

Rolf Peter Schulz

Bernt Krebs

Pierre Babusiaux

Christian Thulig

Wolfgang Anton Herrmann

Gerd Reinhardt

Steffen Dapperheld

Laurent Weisse

Vera Friderichs

Gerhard Lobmaier

Uwe D Oller

Manganiferous polyoxometallates, synthesis and use thereof

Epoxides produced by the oxidation of olefins with air or oxygen

Bleach composition comprising one or more bleaching agents and one or more polyoxometallates of the formula

Bleaching composition comprising polyoxometallates as bleaching catalyst

A process for preparing chiral epoxides using chiral manganese triazanonane complexes as oxidation catalysts. These catalysts have the general formula

Process for preparing chiral epoxides using chiral manganese

The chiral manganese-triazonone complex of the general formula (I) is disclosed:

Chiral manganese triazononane complexes

A process is described for the selective mono-ortho-hydroxyalkylation of 4-substituted pyridine derivatives. In this case a nucleophilic hydroxyalkylation is carried out on the protonated pyridine derivative under the action of peroxodisulfate.

Process for the selective mono-ortho-hydroxyalkylation of 4-substituted

Process for preparing trifluoromethyl ketones

Electrochemical process for preparing glyoxylic acid

The present invention describes a process for preparing glyoxylic acid by electrochemical reduction of oxalic acid in aqueous solution in divided or undivided electrolytic cells, wherein the cathode comprises from 50 to 99.999% by weight of lead and the aqueous electrolysis solution in the undivided cells or in the cathode compartment of the divided cells in addition contains at least one salt of metals having a hydrogen overpotential of at least 0.25 V, based on a current density of 2500 A/m.sup.2, and a mineral acid or organic acid. The process according to the invention has the advantage that a highly pure, expensive lead cathode can be dispensed with and industrially available lead-containing materials can be used, for example alloys which, in addition to lead, comprise at least one of the metals V, Sb, Ca, Sn, Ag, Ni, As, Cd and Cu. Periodic rinsing with nitric acid can be dispensed with.

Electrochemical process for reducing oxalic acid to glyoxylic acid

Process for oxidizing hydroxymethylpyridine derivatives to pyridinecarboxylic acid derivatives at nickel oxide hydroxide anodes A process is described for oxidizing o-hydroxymethylpyridine derivatives into their pyridinecarboxylic acid derivatives at nickel oxide hydroxide anodes.

Process for oxidizing hydroxymethylpyridine derivatives to

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Frankfurt-am-Main, Germany

Bernd Scharbert