Sartorius Ag

Sartorius

Eberhard Wunn

Dietmar Nussbaumer

Wolfgang Demmer

Horst Kluver

Hans-Weddo Schmidt

Hans Beer

Abdul R Weiss

Dieter Melzner

A process for cross-linking a cellulose hydrate membrane by use of a water-soluble diepoxide in an alkaline solution. The membrane so produced is highly resistant to attack by alkalis, acids and cellulases, and is readily regenerable by alkaline cleaning.

Cross-linked cellulose hydrate membranes

There is disclosed a method for grafting unsaturated monomers to nitrogen-containing polymers in an aqueous environment and in the presence of carbon tetrachloride and certain reducing agents.

Process for grafting of nitrogen containing polymers and polymers

Fabrication of the surface-grafted microporous membranes by coating the membrane with an N-halogenated compound, followed by grafting with an unsaturated monomer and sodium dithionite in a primarily aqueous solution that may contain an organic halogen compound selected from carbon tetrachloride and trichloroacetic acid. The coating may be formed in situ and may be cross-linked.

Method for the surface modification of formed bodies and formed bodies

The invention relates to a textile reinforced membrane filter wherein the membrane filter material and the textile reinforcing material are made from synthetic polymers of the same substance class. A method for the production of the textile reinforced membrane filters where the first contact time between the filter solution film and the textile reinforcement material is maintained between 0.1 and 15 seconds.

Textile reinforced membrane filter, method for manufacture and

Process for the surface grafting of formed bodies, in particulate also

The invention relates to porous membrane filters, specifically mirco- and ultraporous membrane filters, which have fluid-impermeable areas as a result of a change of their structure on one side of the membrane to a film-like state (film-formation). These filters are, for example, very suitable for an assembly in filter cartridges according to the pouring method, because they still have on the side opposite to the filmed-up side a porous structure, which offers an ideal anchoring possibility for penetrating liquid resin.

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Gottingen, Germany

Eberhard Wunn