Ec Erdolchemie Gmbh

Bayer Aktiengesellschaft

Erdolchemie Gmbh

Ludwig Bruns

Eduard Alter

Gunther Schnuchel

Gunther Nischk

Eduard Radlmann

Hans-Walter Brandt

Hans-Dieter Kohler

Geert Christoph

Werner Volprecht

Heinrich Steude

Joachim Weber

Silver-containing supported catalyst, catalyst intermediates, processes for their preparation and the use of such catalysts in the preparation of alkaline oxides is described. By the preparatory technique of the invention there is obtained an improved catalyst which is especially useful in the preparation of alkylene oxides by oxidation of alkenes with oxygen-containing gases. The novel catalysts are characterized by a BET specific surface area of about 0.4 to about 0.5 square meters per gram and by a uniform continuous particle structure of spherical silver crystallites on a supported catalyst, which crystallites have an average diameter of 0.3 to 0.4 .mu.m.

Silver-containing supported catalysts and catalyst intermediate

A process and apparatus for the separation of components from a mixture which forms an azeotrope is disclosed by subjecting the mixture to extractive distillation to remove one of the components and regeneration to separate another component from the extracting agent added to the extractive distillation column. According to the invention, a first side stream is withdrawn from the extractive distillation column, passed in heat exchange with the bottoms from the extractive distillation column en route to the regeneration column and returned to the extractive distillation column at a point below the point at which it is withdrawn. A second side stream from the extractive distillation column is withdrawn, passed in heat exchange with the bottoms of the regeneration zone and returned to the extractive distillation column. For this purpose, separate heat exchangers are used for the respective side streams.

Process and device for the separation of mixtures which form an azeotrope

An improved process for the absorption of an olefin in a silver salt solution and the recovery thereof by desorption is disclosed wherein the silver salt of the silver salt solution is silver trifluoroacetate.

Process for separating off olefins from gases containing olefins

Thioglycols are prepared by reacting alkylene carbonates with hydrogen sulfide at 50.degree. - 250.degree. C in an inert solvent in the presence of a carbonate or bicarbonate of alkali or alkaline earth metal as catalyst for the reaction.

Process for the preparation of thioglycols

The invention relates to novel permanently antistatic polyamide compositions comprising an aliphatic polyamide and from 0.5 to 40 % by weight, based on the polyamide composition, of a polyalkylene oxide obtained by the copolymerisation of mono-epoxides with di- or tri-epoxides.

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Dormagen-Straberg, Germany

Ludwig Bruns