Evonik Degussa Gmbh

Evonik Operations Gmbh

Markus Rudek

Robert Franke

Dirk Fridag

Hans-Gerd Lueken

Markus Priske

Susann Witzsche

Stefan Bade

Burkhard Standke

Dieter Hess

Klaus-Diether Wiese

Bart Hamers

Marc Becker

Udo Lenz

Soenke Broecker

Torsten Peterle

Reiner Störger

Christoph Patalong

Claudia Drescher

Burkhard John

Sönke BRÖCKER

Novel epoxy-functional alkoxysilanes have, for example, formulae II, III, IV, V, and VI. 

Epoxy-functional alkoxysilanes, method for the production and use thereof

A process can prepare a 3-glycidyloxypropylalkoxysilane of formula (I), (R')O&#x2014;(CH)&#x2014;Si(OR)(I), where R groups are independently a methyl or ethyl group and R&#x2032; represents an HC(O)CHCH&#x2014; group. The process includes reacting (i) a functionalized alkene of formula (II), (R&#x2032;)O&#x2014;CH(II), where R&#x2032; represents an HC(O)CHCH&#x2014; group, with (ii) at least one hydroalkoxysilane of formula (III), HSi(OR)(III), where R groups are independently a methyl or ethyl group. The reacting takes place in the presence of (iii) a Karstedt catalyst or a catalyst having hexachloroplatinic acid as a homogeneous catalyst, and (iv) 2-ethylhexanoic acid, isononanoic acid, or both. The process further includes obtaining a product of the reacting.

Process for preparing 3-glycidyloxypropyltrialkoxysilanes

The invention relates to a method for producing alcohols by homogeneously catalyzed hydroformylation of olefins to aldehydes and subsequent hydration of the aldehydes. The invention further relates to a system for carrying out the method. The main focus is on the separation technique for work-up of the hydroformylation mixture. The problem addressed by the invention is that specifying a work-up method for hydroformylation mixtures that utilizes the specific advantages of known separation technologies but at the same time largely avoids the specific disadvantages of said separation technologies. The most important objective is to create a catalyst separation system that is as complete and at the same time conservative as possible and that operates in a technically reliable manner and entails low investment and operating costs. The method should be unrestrictedly suitable for processing the reaction output from oxo systems in 'world scale' format. The problem is solved by combining membrane separation units and a thermal separation unit, the thermal separation unit being operated in such a manner that 80% to 98% of the mass introduced with the product stream into the thermal separation unit exits the thermal separation unit again as a head product.

Optimized separation technique for work-up of homogeneously catalysed hydroformylation mixtures

The present invention relates to a method and a device for controlling the viscosity of reaction solutions in the hydroformylation of olefin-containing mixtures.

Control of the viscosity of reaction solutions in hydroformylation processes

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Büttelborn, Germany

Markus Rudek