Degussa Aktiengesellschaft

Evonik Degussa Gmbh

Hans Lansink-Rotgerink

Stefan Wieland

Emmanuel Auer

Klaus Deller

Mario Scholz

Juergen Meyer

Dieter Kerner

Helmfried Krause

Andreas Freund

Werner Hartmann

Heike Riedemann

Hauke Jacobsen

Guenther Kunz

Inorganic support materials containing sulphonate and mercapto groups, and a process for the modification of these materials with the corresponding difunctional organosilicon compounds and use thereof as catalysts in acid-catalyzed reactions.

Inorganic support materials containing sulphonate and mercapto groups,

A process for the production of 2,2'-bis(4-hydroxyphenyl)propanes by reacting the corresponding phenols and carbonyl compounds in the presence of organopolysiloxanes containing sulphonate and mercapto groups and acting as a catalyst, consisting of units of the formula

Production of 2,2'-bis (4-hydroxyphenyl) propanes in the presence of

Granules based on silicon dioxide and having the properties:

Granules based on pyrogenically prepared silicon dioxide, methods for

A process for hydrogenolysis of C--O and C.dbd.O bonds in organic substances by reaction with hydrogen in the presence of a catalyst system which contains at least one metal from Groups VIII and/or IB of the Periodic System of Elements on a support consisting of at least one solid acid with an acid activity index of at least 90%.

Process for the hydrogenolysis of C--O and C.dbd.O bonds in organic

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Glattbach, Germany

Hans Lansink-Rotgerink