Celanese Gmbh

Celanese Chemicals Europe Gmbh

Hoechst Aktiengesellschaft

Aventis Research & Technologies Gmbh & Co Kg

Hoechst Research & Technology Deutschland Gmbh & Co. Kg

Sandra Bogdanovic

Helmut Bahrmann

Carl-Dieter Frohning

Hans-Jerg Kleiner

Matthias Beller

Steffen Haber

Holger Geissler

Ernst Wiebus

Klaus Kuhlein

Klaus Raab

Alexander Zapf

Hartmut Fischer

Peter Gross

Uwe Ritter

Herbert Roesky

Thomas Borrmann

Jurgen Krauter

The invention relates to a method for producing aldehydes by reacting one olefine containing 3 to 12 carbon atoms with hydrogen and carbon monoxide in the presence of one rhodium catalyst. The invention is characterized in that (a) the rhodium catalyst is present in an aqueous phase, whereby the aqueous phase contains i) rhodium in an elemental or bonded form, ii) one trisulfonated triaryl phosphine, and iii) one crown etherl (b) the olefine is present in the reaction conditions in a liquid organic phase which cannot be mixed with the aqueous phase.

Method for producing aldehydes by hydroformylation in the presence of crown ether

A catalyst composition comprising a) more than 70% by weight of a polyethylene glycol of the formula H&mdash;(OCH &mdash;CH ) &mdash;OH, where n is an integer of 3 to 16 and the number average molecular weight is less than 650 b) rhodium in elemental form or bound form and c) 2 to 25% by weight of water soluble sulfonated triarylphosphine ligand having 1 to 2 phophorus atoms and not more than 25% by weight of water based on the total amount of the catalyst and its use for the hydroformylation of olefins to aldehydes is described.

Method for preparing aldehydes by hydroformylation

The invention concerns a process for preparing aldehydes by reacting with hydrogen and carbon monoxide at a temperature of between 20 and 170&deg; C. and a pressure of between 1 and 300 bar an olefinically unsaturated C,-C,compound in the presence aqueous phase containing rhodium and sulphonated triarylphosphines as catalyst and between 10 and 70 wt % of a compound of formula (1), R(OCH,CH,),OR,, R standing for hydrogen, a straight-chain or branched C,-C,alkyl group or a C,-C,hydroxyalkyl group, R,standing for hydrogen or a methyl group, and n standing for an integer from 3 to 50.

Process for preparing aldehydes in the presence of an aqueous phase containing rhodium and sulphonated triarylphosphines as catalyst

According to the invention, branched and straight chain alkenes and cycloalkenes with five and more C-atoms are by means of hydroformylation using a novel rhodium-tri-polyethylene glycolate of a polyethylene glycol with an average molecular weight of 320 to 650 as a catalyst with at hydrogen/carbon monoxide pressure of 60 to 200 bar and at a temperature of between 50 and 150&deg; C. converted into branched and straight chain alkanals and cycloalkanals with six and more C-atoms. The reaction is preferably carried out in water or polyethylene glycol or a mixture of the same as a solvent in the heterogeneous phase. The aldehydes obtained are easy to separate from the catalyst in the reaction preparation. Said aldehydes are also obtained with a high level of purity and a high yield.

Method for producing alkanals using a rhodium-tri-polyethylene glycolate

Phosphanes, their method of production and use in metal complexes

The invention concerns a process for preparing aldehydes by reacting with hydrogen and carbon monoxide at a temperature of between 20 and 170&deg; C. and a pressure of between 1 and 300 bar an olefinically unsaturated C,-C,compound in the presence of an aqueous phase containing rhodium and sulphonated triarylphosphines as catalyst and between 1 and 35 wt % of a compound of formula (1), R(OCH,CH,),OR,, R standing for hydrogen, a straight-chain or branched C,-C,alkyl group or a C,-C,hydroxyalkyl group, R,standing for hydrogen or a methyl group, and n standing for an integer from 3 to 50.

Process for preparing aldehydes by hydroformylation

A catalyst comprising rhodium and a compound of the formula (I)

Catalyst and process for the production of aldehydes by hydroformylation of olefinically unsaturated compounds

Process for recovering cobalt carbonyl catalysts used to produced

Tertiary phosphanes containing alkylene glycol groups

The present invention relates to a process for recovering the cobalt carbonyl catalyst used, in which a water-soluble cobalt salt is first prepared by addition of acid and this is subsequently precipitated as cobalt hydroxide. This cobalt hydroxide is then reacted with the N-acyl-.alpha.-amino acid derivative for whose preparation the cobalt carbonyl catalyst is intended, and the resulting cobalt-containing melt is converted into the cobalt carbonyl catalyst in the presence of a mixture of carbon monoxide and hydrogen.

Process for recovering cobalt carbonyl catalysts used in the preparation

Growing community of inventors

Frankfurt-am-Main, Germany

Sandra Bogdanovic