Bayer Aktiengesellschaft

Other

Uop Lcc

Kemira Oyj

Akzo Nobel Chemicals International B.v.

Praxair Technology, Inc.

Kernforschungszentrum Karlsruhe Gmbh

Bayer Materialscience Ag

Vetrotech Saint-gobain Ag

Lothar Puppe

Hans-Josef Buysch

Gerhard Reiss

Artur Botta

Bruno Hees

Alexander Klausener

Gunter Klug

Gunter Ulisch

Peter Wimmer

Helmut Fiege

Otto Immel

Heinz Landscheidt

Johan Kijlstra

Erich Wolters

Karlheinrich Meisel

Bernd Thiele

Arno Nennemann

Dietrich Pantke

Gerd-Friedrich Renner

Wolfgang Held

Jurgen Wilhelm

Axel Konig

Dieter Arlt

Helmut Waldmann

Karlfried Wedemeyer

Paul Wagner

Lutz Schmalstieg

Hans-Heinrich Moretto

Rudolf Braden

Rolf Grosser

Reinhard Langer

Manfred Bock

Michael Mager

Thomas J Hunt

Harald Kraus

Udo Gelderie

Manfred Hajek

Theodor Engbert

Peter Schwabe

Stefan Groth

Gerhard Jonschker

Alfons Klein

Josef Kasbauer

Reiner Voigt

Irina Belov

Manfred Mansmann

Masakazu Kondo

Peter Mues

Ursula Pentling

Werner Jeblick

Andreas Nickel

Thomas Hübbe

Jurgen Weisser

Hidetoshi Kita

Michael Hullmann

Michael Pies

Kai Rohlk

Friedrich Schwochow

Heinrich Pelster

Martin Grunwald

Norbert Schwankhaus

Kenichi Okamoto

Robert Endres

Manfred Borgardt

Raimund Wambach

Sigurd Hartung

Manfred Mengel

Gerd Passing

Peter-Nikolaus Schmitz

Hans-Georg G&ouml;bbel

Hartmut Melzer

Yoshio Morigami

Theodor Bohmann

Thomas Hubbe

Friedrich Kindervater

Bernard Munchenbach

Helmut Le Blanc

Claus Kobusch

Ansgar Eltner

Hans-Ingolf Paul

Heinz Drave

Christian Froehlich

A light-permeable heat-protection element including at least one support element and at least one protective coating containing a reaction product which includes an aqueous alkali silicate solution and aluminate-modified or borate-modified silicon dioxide.

Light-permeable heat protection element with aluminate-modified or borate-modified silicon dioxide

A process of preparing a silica sol is described. The process involves reacting a fresh sol with guanidine carbonate. The reaction may be conducted in the presence of a base (e. g. , sodium water glass), and at a pH of from 8 to 12. The process of the present invention may also include concentrating steps. The silica sol prepared by the method of the present invention has a BET surface area of greater than or equal to 100 m/g, and contains from 0.05 to 15% by weight of gaunidinium ions, based on the total weight of the silica gel.

Silica gel comprising guanidine carbonate

Use of silica sols containing sulfonic acid groups and/or mercapto groups as microparticles in paper production, in particular for paper retention.

Paper production with modified silica gels as microparticles

Provided is a novel high selectivity aqueous slurry composition method of utilizing same. The composition includes non-modified silica based abrasive particles in an amount of about 5 to about 50 weight percent, and an organic compound in an amount of about 0.001 to about 2.0 weight percent in an aqueous solution, wherein the silicon oxide to silicon nitride selectivity ratio ranges from about 50 to about 700.

High selectivity colloidal silica slurry

Method for producing 4-chlorobiphenyl and 4-chlorobiphenyl-specific specifications

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

The present invention relates to mixtures containing organic polymers, inorganic particles and inorganic-organic binders to organic-inorganic hybrid materials which can be produced from these mixtures and to the use of these hybrid materials.

Organic-inorganic hybrid materials

The present invention relates to binder-free molecular sieve zeolite granules of lithium zeolite A and lithium zeolite X, a process for preparing these molecular sieve zeolite granules and their use for preparing nitrogen or oxygen from air by pressure swing adsorption.

Binder-free molecular sieve zeolite granules which contain zeolites of

In an adsorptive alternating pressure process for the enrichment of air with oxygen using a molecular sieve zeolite in an adsorber, wherein adsorbed components are desorbed under a pressure below the pressure at which air separation and N.sub.2 adsorption is effected and, after desorption, the molecular sieve adsorber is at least partly returned to the air separation pressure with oxygen gas produced in countercurrent to the air separation gas flow, the improvement which comprises cooling product gas and covering the molecular sieve adsorber with the cooled product gas.

Oxygen enrichment process

The present invention relates to colloidal metal oxides having blocked isocyanate groups, which are based on the reaction product of

Colloidal metal oxides having blocked isocyanate groups

In the pressure swing adsorption of nitrogen from gas mixtures with less polar gas components at temperatures of between 20.degree. and 50.degree. C., wherein the gas mixture is passed through an adsorber which is filled with packings of zeolite pellets and has an inlet zone and an outlet zone, the improvement which comprises providing at least two packings in the adsorber, a packing of Li-zeolite X in the inlet zone of the adsorber and a packing of at least one of Ca-zeolite A and Ca-zeolite X in the outlet zone of the adsorber.

Process for the adsorption of nitrogen from gas mixtures by means of

An improved process for the oxygen enrichment of air by vacuum swing adsorption, pressure swing adsorption or a combination thereof, wherein the improvement comprises providing at least one packing at each of the air inlet to and air outlet from the adsorber, the packing at the air inlet side of the adsorber comprising Na-Ca zeolite X with an SiO.sub.2 /Al.sub.2 O.sub.3 ratio of 2.0 to 2.5 and with a CaO/Al.sub.2 O.sub.3 ratio of 0.4 to 0.75, the ratio being dependent upon the air inlet temperature, at an air inlet temperature of 20.degree. to 30.degree. C., the CaO/Al.sub.2 O.sub.3 ratio of the Na-Ca zeolite X at the inlet zone being 0.4 to 0.6, at an air inlet temperature of 30.degree. to 40.degree. C., the CaO/Al.sub.2 O.sub.3 ratio of the Ca zeolite X at the inlet zone being 0.55 to 0.65 and at an air inlet temperature of 40.degree. to 50.degree. C., the CaO/Al.sub.2 O.sub.3 ratio of the Na-Ca zeolite X at the inlet zone being 0.6 to 0.75, the packing at the air outlet side of the adsorber comprising Na-Ca zeolite A with a CaO/Al.sub.2 O.sub.3 ratio of 0.5 to 1.0 or Na-Ca zeolite X with CaO/Al.sub.2 O.sub.3 ratio of 0.4 to 1.0, above the CaO/Al.sub.2 O.sub.3 ratio of the Na-Ca zeolite X at the inlet side.

Adsorptive oxygen enrichment of air with mixtures of molecular sieve

The present invention relates to investment compounds containing zeolites and to models and moulds made from these. The investment compounds according to the invention are used in metal casting, preferably in the preparation of precision castings.

Casting investment compounds

Growing community of inventors

Burscheid, Germany

Lothar Puppe