Evonik Fibres Gmbh

Evonik Degussa Gmbh

Creonia Cells Gmbh

Markus Ungerank

Harald Roegl

Goetz Baumgarten

Harald Rögl

Michael Ferenz

Peter Schwab

Markus Priske

Hardi Doehler

Rene Haensel

Tymen Visser

Marina Lazar

Herbert Griesser

Joerg Balster

Friedel Schultheis

Jorg Balster

Ingrid Winette Velthoen

Juergen Eder

Dieter Danzer

Christian Maurer

Peter Seidensticker

Christoph Führer

Jörg Balster

Christoph Fuhrer

Jürgen Eder

Andreas Pedersen

The invention relates to polyimide membranes and to a phase inversion method for the production thereof. The polyimide membranes can be used to separate different gas mixtures.

Polyimide membranes made of polymerization solutions

The present invention relates to novel block copolyimides for preparing highly selective integrally asymmetrical gas separation membranes of improved permeance, processes for preparing these block copolyimides, membranes prepared from the block copolyimides, and also the use of the block copolyimides and of the membranes prepared therefrom.

Highly-selective polyimide membranes with increased permeance, said membranes consisting of block copolyimides

The invention concerns polyimide membranes, preferably composed of P84 type 70 or P84 HT, having improved chemical and physical properties, a method of producing same and also their use.

Method for producing polyimide membranes

The present invention relates to a method of controlling a gas separation plant, to a plant thus controlled and also to its use for separation of gas mixtures, especially in the processing of biogas or natural gas, or syngas.

Control of gas composition of a gas separation system having membranes

Composite membrane having a separating membrane layer characterized in that a separating membrane layer is produced by curing laterally modified silicone acrylates of the general Formula I 

Composite silicone membranes of high separation efficiency

The invention relates to shaped bodies having high thermooxidative stability, which can be produced by means of direct forming and hot compression molding processes, and to a novel polyimide powder for production thereof and to a process for production of this polyimide powder.

Polyimide powder having high thermooxidative stability

The invention relates to a special apparatus, in particular linkage of gas separation membrane modules, and a special method for separating gas mixtures containing helium.

Method for separating gases

The invention relates to a specific apparatus, more particularly a chain of gas separation membrane modules, for separation of gas mixtures into two fractions each of elevated purity.

Process for separation of gases

The invention describes a process for preparing pulverulent polyimide-polyimide block copolymers. The result polyimide-polyimide block copolymers and compounds produced using them can be compressed into moldings by the direct forming method or by the hot compression molding method. Polymeric moldings can be produced therefrom by customary mechanical and thermal machining and forming methods.

Process for preparing a block copolymer from polyimides and use of the block copolymer for producing powders and mouldings

Process for preparing 4,4'-difluorobenzophenone, characterized in that, in a first step, fluorobenzene is reacted with formaldehyde under catalysis by organic sulphonic acids to give difluorodiphenylmethane, the product obtained is isolated, and, in a second step, oxidized with nitric acid to give 4,4&#x2032;-difluorobenzophenone. 4,4&#x2032;-Difluorobenzophenone (4,4&#x2032;-DFBP) is the central starting material for the preparation of aromatic polyether ketones.

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Markus Ungerank