Bayer Aktiengesellschaft

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Hermsforfer Inst. Fur Technische Keramik E.v.

Bayer Intellectual Property Gmbh

Sartorius Stedim Biotech Gmbh

Bayer Technology Services Gmbh

Hermsdorfer Institut Für Technische Keramik E.v.

Andreas Nickel

Wolfgang Arlt

Dieter Arlt

Alexander Klausener

Paul Wagner

Hans-Dieter Block

Hans-Heinrich Moretto

Lothar Puppe

Masakazu Kondo

Ingolf Voigt

Michael Traving

Hans-Walter Brandt

Peter Schmidt

Hidetoshi Kita

Kenichi Okamoto

Ingo Janisch

Holger Linne

Werner Ludovici

Ulrich Schwartz

Hans-Georg G&ouml;bbel

Yoshio Morigami

Peter Schober

Uwe Brekau

Martina Mutter

Gregor Dudziak

Karl H Reissinger

Hans-Walther Brandt

Thomas Melin

Kerstin Baumarth

Olaf Stange

Gundula Fischer

Michael Stahn

Birgit Köhler

Ansgar Eltner

Stefan Haufe

Thomas Hoyer

Petra Puhlfuerss

A separation module which contains at least one bundle of ceramic capillaries (), in which, for controlling the material transport and the flow in the separation module, a certain distance is established between the capillaries () by joining. The separation module can be used in a variety of ways in the separation of substances by filtration, also in combination with further measures of chemical process engineering.

Separation module, method for its production and its use

Method and appliance for carrying out membrane electrophoresis using microfiltration or ultrafiltration membranes, wherein the electroosmotic flow which develops in the membrane pores is reduced or offset by pressure superposition. The appliance for the membrane electrophoresis comprises at least an at least quadrupartite separation chamber (), having at least one diluate space () and one concentrate space () and also a cathode space () and an anode space () having electrodes as anode () and cathode (), with the individual spaces () being separated from each other by ultrafiltration or microfiltration membranes (); feed lines () and discharge lines () for the diluate, feed lines () and discharge lines () for the concentrate, optionally feed lines () and discharge lines () for the electrode rinsing solution, and also a device () or () for pressure regulation by means of which a pressure difference, in particular of at least 3 kPa, can be generated between the diluate space () and the concentrate space ().

Device and method for preparative electrophoresis

A porous composite structure, and in particular a membrane, for separating fluids is described. The composite structure comprises at least a porous support and a zeolite layer applied to the support and the zeolite is a zeolite of the T type or of an erionite type.

Membrane for separating fluids

Process for the production and concentration of alkaline silica sols containing nonaggregated, spherical SiO.sub.2 particles with a diameter of .gtoreq.1 nm starting with SiO.sub.2 concentrations of 4-8% by weight, using microporous membrane filters.

Process for the production and concentration of silica sols

A first alkanol having 1 to 3 C atoms or a mixture of this first alkanol with water or water itself can be separated off from oxygen-containing organic compounds having 3 to 7 C atoms from the group comprising second alkanols and dialkyl carbonates, which always have at least 2 C atoms more than the first alkanol, by permeation on membranes if a membrane obtained by plasma polymerization is employed.

Process for separating off alkanols, mixtures of alkanols and water or

Diastereomers can be separated with good industrial success with the aid of extractive distillation. The separation process is characterized in that an auxiliary which changes the partial pressure of the various diastereomers to be separated to a different degree and thus allows easier separation of the diastereomers by distillation is added during the distillation. Using the present process diastereomic cis/trans-permetric acid methyl esters and mixtures of menthol and isomenthol can be separated with isolation of 99% pure product.

Separation of diastereomers by extractive distillation

Packing consisting of a plurality of twisted strips stacked parallel to each other in an axially symmetrical arrangement. Twisting produces spirals rotating in the same sense. In addition, the strips are pleated to produce waves perpendicular to the axis of the spiral. When the packing is assembled from the spirals, the individual spirals are staggered in relation to each other to form continuous channels extending in straight lines in four axially symmetric directions. The axially symmetric directions are defined in that their projections in the horizontal plane form an angle of 90.degree. with each other and an angle .alpha. formed between the said axially symmetric directions and the axis of symmetry of the packing depends solely on the ratio of the widths of the spirals to their pitch.

Packing for technical processes

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Wetter, Germany

Andreas Nickel