Bayer Aktiengesellschaft

Wolff Walsrode Ag

Bayer Akteingesellschaft

Hans-Josef Buysch

Norbert Schon

Reinhard Langer

Paul Wagner

Johann Rechner

Pieter Ooms

Heinrich Krimm

Alexander Klausener

Lothar Puppe

Carsten Hesse

Christine Mendoza-Frohn

Herbert Eichenauer

Otto Immel

Steffen Kuhling

Karl-Heinz Ott

Klaus Szablikowski

Gerhard Darsow

Gerhard Fennhoff

Artur Botta

Bert Brassat

Gerd Fengler

Hans Rudolph

Edgar Leitz

Heinrich Schrage

Ulrich R Grigo

Wieland Hovestadt

Josef Buekers

Hugo Vernaleken

Hans-Jurgen Kress

Franz-Josef Mais

Martin Melchiors

Zsolt Szentivanyi

Klaus D Berg

Gottfried Zaby

Ulrich Notheis

Dieter Arlt

Ludwig Bottenbruch

Thomas Scholl

Eberhard Zirngiebl

Wolfgang Nising

Alfred Eitel

Hans-Walter Illger

Ralf Pakull

Dieter Freitag

Christian Lindner

Roderich Raue

Claus H Wulff

Karsten J Idel

Volker Serini

Horst Peters

Alfred Pischtschan

Reinhold M Klipper

Josef Witte

Ernst Roos

Peter M Lange

Hermann Gruber

Wolfgang Wellner

Theodor Engbert

Erich Eimers

Hartwig Hocker

Harald Oertel

Helmut Keul

Klaus Konig

Hanns P Muller

Werner Obrecht

Carlhans Suling

Harald Blum

Wolfgang Ebert

Karl-Erwin Piejko

Helmut Waldmann

Rudolf Binsack

Karsten-Josef Idel

Lutz Schmalstieg

Dieter Margotte

Klaus Horn

Uwe Westeppe

Rolf Grosser

Pramod Gupta

Wolfgang Alewelt

Friedemann Muller

Bruno Bomer

Manfred Dietrich

Edgar Ostlinning

Harro Traubel

Hans-Detlef Heinz

Jurgen Kirsch

Werner Nielinger

Gunther Boehmke

Josef Merten

Peter Tacke

Wolfgang Koch

Heinrich Heine

Heinrich Konigshofen

Frieder Heydenreich

Kaspar Hallenberger

Wolfgang Jakob

Tony Van Osselaer

Jorg-Dietrich Jentsch

Ricarda Leiberich

Winfried Paul

This invention relates to a new one-component stoving composition, which can be baked at low temperatures without the release of volatile compounds and which also has satisfactory stability when stored at room temperature. The invention also relates to the use of the one-component stoving composition.

One-component stoving composition and use thereof

In the process for preparing an aromatic carbonate from an aromatic hydroxy compound, CO and O in the presence of a quaternary salt and a base using a platinum metal catalyst and a cocatalyst, use is advantageously made of supported catalysts containing, in the reaction-ready state, (i) a platinum metal, a platinum metal halide or a platinum metal halide complex and (ii) a metal compound acting as cocatalyst from groups IB, IIB, IIIA, IIIB, IVA, IVB, VB, VIB, VIIB, the iron group (atomic numbers 26-28) or the rare earth metals (atomic numbers 58-71) of the Periodic Table of the Elements (Mendeleev), each in an amount of 0.01-15% by weight, calculated as metal and based on the total weight of the catalyst.

Supported catalysts containing a platinum metal and process for preparing diaryl carbonates

The present invention relates to a process for the manufacture of bis(4-hydroxyaryl)alkanes by heterogeneous acid-catalyzed reaction of aromatic hydroxy compounds with ketones in reactors connected in series, which in the direction of advancing conversion are operated with rising temperature and optionally with increasing loading.

Process for the manufacture of bis(4-hydroxyaryl)alkanes

Polyether polyols can be prepared by reacting polyols with epoxides in the presence of basic catalysts, by treating the polyether polyols containing the basic catalysts with OH-functional solid compounds of metals of groups III to VIII of the periodic system of the elements (Mendeleyev), the compounds being insoluble in the polyether polyols and having BET surface areas of from 10 to 1000 m /g, isolating the solid inorganic compounds laden with the basic catalysts from the polyether polyol and using them in the reaction of polyols with epoxides, or bringing the isolated inorganic compounds laden with the basic catalysts into contact with the polyols that are to be used in the reaction with epoxides, separating those polyols from the inorganic compounds and delivering them to the reaction with epoxides.

Method for preparing polyether polyols

The present invention relates to a process for the continuous production of dihydroxydiarylalkanes (bisphenols) by the reaction of fresh phenol, phenol and isoalkenylphenol from the decomposition of by-products, and ketone. In this process the bulk of the bisphenol is recovered from the reaction mixture by crystallization and the mother liquor obtained is freed from phenol by distillation. The phenol is returned to the reaction and the bottoms obtained during the distillation are decomposed in a reactive rectification after addition of a basic catalyst. The phenol and isoalkenylphenol leaving at the top are led back into the reaction; the bottoms from the first reactive column are acidified and in a second reactive rectification, in the presence of an acid catalyst, are further decomposed into phenol, which distils off and is reused in the reaction, and bottoms, which are disposed of.

Method for continuous production of dihydroxydiarylalkanes

The present invention relates to a process for the continuous production of dihydroxydiphenylalkanes (bisphenols) by the reaction of fresh phenol, and of phenol obtained from the cracking of by-products, with isoalkenylphenol and ketone. In the course of this process, the reaction mixture is worked up by distillation and a high purity bisphenol is produced. The bottom products and distillates containing the by-products are cracked under basic conditions and optionally thereafter under acidic conditions. The cracked products, which substantially consist of isoalkenylphenol and phenol, are recycled, optionally after purification, with the phenol obtained during the purification of bisphenol, to the reaction to form bisphenol, and the residue obtained from cracking is disposed of.

Method for continuous production of dihydroxydiphenylalkanes

The present invention relates to a process for the production of bis-(4-hydroxyaryl)-alkanes by a heterogeneously catalyzed reaction of aromatic hydroxy compounds with ketones in at least two reactors connected in series, which, as the reaction progresses, are operated at higher temperatures, wherein the total quantity of ketone is divided between the individual reactors in such a manner that the higher is the temperature of the particular reactor, the smaller is the proportion per reactor, the highest possible reactor loading is maintained and the temperatures and temperature gradients are kept as low as possible.

Process for preparing bis-(4-hydroxyaryl) alkanes

The present invention relates to a process for working up the residual mother liquors from the production of dihydroxydiarylalkanes (bisphenols) discharged from the process once the bisphenol has been separated.

Method for processing mother liquors from the production of bisphenol

A process for the preparation of carbonates containing aromatic ester groups is disclosed. The process entails reacting aromatic monohydroxy componds with phosgene or with chlorocarbonic acid esters of aromatic monohydroxy compounds at a temperature of 50 to 350&deg; C. and in the presence of active carbon as catalyst.

Process for the production of aryl carbonates

The present invention relates to a process for the preparation of aliphatic oligocarbonate diols by

Process for the preparation of aliphatic oligocarbonate diols from

Ru--Pd halogen-free catalyzers and method for producing cycloaliphatic

Production of aromatic amines by means of novel hydrogenation catalysts

Platinum metal-containing catalyst systems, which comprise at least one platinum metal, a co-catalyst and other salts, and which are used for the production of diaryl carbonates by the oxidative reaction of aromatic hydroxy compounds with carbon monoxide, can be reactivated by treating the deactivated catalyst system in the liquid phase with an oxidising agent, removing the excess oxidising agent, and reacting the reactivated catalyst system with a carboxylate or diketonate.

Process for reactivating catalyst systems containing a platinum group

Process for producing aromatic amines by gaseous phase hydrogenation

Growing community of inventors

Krefeld, Germany

Hans-Josef Buysch