Degussa Aktiengesellschaft

Evonik Degussa Gmbh

Andreas Harthun

Christoph Theis

Stefan Schulze

Joachim Luethi

Andreas Goelz

Manfred Neumann

Josef Metz

Hans Christian Alt

Christian Alt

Martin Wille

André Noppe

A process for the production or coating of granules in a fluidized bed, which includes heating a fluidized-bed gas to produce the fluidized bed, and applying a liquid medium containing a granule-forming or coating-forming compound, or at least one reaction component therefore, by spraying particles located in the fluidized bed and at a same time vaporizing an organic solvent contained in the liquid medium, said particles having a smaller mean diameter than that of particles to be produced. The process also includes partial condensation of an organic solvent from at least a portion of a fluidized-bed waste gas leaving the fluidized bed, and re-heating the fluidized bed-gas leaving the condensation device and reintroducing the re-heated gas into the fluidized bed.

Process for the production or coating of granules, apparatus for carrying out the process, and granules obtainable thereby

An alkali metal alkoxide or alkaline earth metal alkoxide in granular form.

Granular akali metal alkoxides and alkaline earth metal alkoxides

Processes for preparing alkali metal alkoxide granules and alkaline earth metal alkoxide granules of aliphatic, saturated or unsaturated, unbranched or branched alcohols, preferably having 1 to 12, in particular 1 to 6, carbon atoms. A preferred process for preparing the alkoxides utilizes fluidized-bed spray granulation.

Processes for preparing alkali metal alkoxide granules and alkaline earth metal alkoxide granules

1,1-cyclopropanedicarboxylic diesters are prepared from malonic diesters, 1,2-dihaloethane and alkali metal carbonate in the presence of a mixture of available or in situ-produced phase transfer catalyst and polyalkylene glycol or derivatives thereof which are capped at one or both ends, in particular those with ether end groups, where the molar ratio of malonic diester: 1,2-dihaloethane: alkali metal carbonate is 1:(1 to 7):(1 to 1.4).

Process for the preparation of 1,1-cyclopropanedicarboxylic diesters

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Moembris, Germany

Andreas Harthun