Bayer Aktiengesellschaft

Agfa-gevaert Ag

Rudolf Braden

Paul Fiedler

Albrecht Marhold

Otto Immel

Hartmuth Buding

Helmut Waldmann

Rutger Neeff

Hans-Helmut Schwarz

Heinz Ziemann

Thomas Himmler

Dietmar Bielefeldt

Ernst Kysela

Klaus Naumann

Hans Knupfer

Wilhelm Stendel

Bernhard Homeyer

Josef Pedain

Wolfgang Behrenz

Kuno Wagner

Benedikt Becker

Manfred Bock

Michael Negele

Karl-Werner Thiem

Wolfgang Auge

Erich Klauke

Kurt Findeisen

Dieter Arlt

Heinz U Blank

Karsten-Josef Idel

Klaus Jelich

Lothar Puppe

Erich Wolff

Gerhard Darsow

Rudiger Schubart

Hans Langen

Manfred Hajek

Hermann Oediger

Gerhard Klein

Friedrich W Krock

Joachim Thormer

Ralf Pakull

Volker Hederich

Joachim Genz

Dieter Kaufmann

Friedrich Werner

Wilfried Niemeier

Gerhard Friedhofen

Paul Losacker

Bernd Schroeder

Sigurd Hartung

Winfried Rosen

Christian Frohlich

Gunter Beck

Gunther Gramm

Saturated, fluorine-containing and chlorine-free hydrocarbons are prepared by catalytically hydrogenating unsaturated, fluorine- and chlorine-containing hydrocarbons at temperatures above 80.degree. C. in the gas phase.

Process for the preparation of saturated, fluorine-containing and

Acylbenzenes of the formula ##STR1## can be prepared by reaction of benzene with carboxylic acids of the formula

Process for the preparation of acylbenzenes

A process for the preparation of a substituted 2-chloropyridine derivatives of the formula ##STR1## in which R.sup.1, R.sup.2, R.sup.3 and R.sup.4 represent hydrogen or various other radicals, which comprises reacting a pyridine-1-oxide of the formula ##STR2## with an aromatic carbonyl chloride in the presence of an inert organic solvent and in the presence of an acid acceptor at a temperature between about -20.degree. C. and 200.degree. C.

Preparation of substituted 2-chloropyridines

A process for the preparation of aniline by hydrogenation of nitrobenzene in the gas phase in the presence of a catalyst containing a noble metal is described. The process can be carried out in an improved manner if the catalyst employed is palladium on graphite or petrol coke, as the support, containing 0.001-1% by weight of Pd, based on the total weight of the catalyst, it being possible for the catalyst also to contain, in addition to the Pd, 0.001-0.5% by weight of Ir and/or 0.001-0.3% by weight of Rh, all figures being based on the total weight of the catalyst.

Catalyst for the preparation of aniline

Di-(4-aminocyclohexyl)-methane containing 15 to 25% by weight of the trans-trans isomer can be obtained by the catalytic hydrogenation of di-(4-aminophenyl)-methane at elevated temperature and elevated hydrogen pressure in the presence of a ruthenium-containing supported catalyst containing 0.05 to 5% by weight ruthenium on an Al.sub.2 O.sub.3 support which has been treated with compounds of rare earth metals and manganese.

Process for the production of di-(4-aminocyclohexyl)-methane containing

Bismuth/alkaline earth metal catalysts which contain 0.005-0.8 g-atom of bismuth per mol of the alkaline earth metal compound employed and can furthermore contain promoters and/or inert additives, and lanthanide catalysts with or without catalyst supports can be employed as catalysts for halogen-fluorine exchange in organic compounds by means of hydrogen fluoride.

Process for halogen-fluorine exchange in organic compounds and catalysts

Polychloro-fluoro-cyclopentenes can be prepared by catalytic reaction of hexachlorocyclopentadiene with hydrogen fluoride in the gas phase with the addition of chlorine.

Process for the preparation of polychloro-fluoro-cyclo-pentenes

Aromatic amines, alkylated on the N-atom, can be prepared by catalytic alkylation of aromatic amines with alcohols or the corresponding ethers or by transalkylation with aromatic amines alkylated on the N-atom, whereby niobic acid or tantalic acid is used as the catalyst.

Process for the preparation of n-alkylated aromatic amines

5-Fluoropyrimidines are obtained in an advantageous manner from halogenated 5-unsubstituted pyrimidines, when these are reacted with elemental fluorine in the presence of a solvent.

Process for the preparation of 5-fluoropyrimidines

Process for the preparation of polyaromatic compounds in which an aromatic dichloro compound, optionally in the presence of an anhydrous aprotic solvent, is reacted with metallic zinc, manganese or magnesium in the presence of a catalyst system of

Soluble polyaromatic compounds

The novel copper catalyst on an Al.sub.2 O.sub.3 -containing carrier which is impregnated with compounds of manganese and of one or more rare earth metals, having a Cu content of 0.1-5% by weight, a total content of compounds of manganese and of the rare earth metal or metals of 0.05 to 8% by weight, calculated as metals, is described, the weight ratio of rare earth metal(s) to manganese being 5:1-1:5, calculated as metal, and all percentages being relative to the total weight of the catalyst. Such catalyst is prepared by first impregnating the carrier with compounds of manganese and of the rare earth metal or metals, then fixing the copper salt on the impregnated carrier and activating the catalyst in a preferred manner by treatment with H.sub.2 at 150.degree. to 350.degree. C. Such a catalyst is suitable, for example, for the N-alkylation of aromatic amines with alkanols, where the aromatic amines can be prepared from the parent nitro compounds in an alkylation reactor with simultaneous addition of H.sub.2.

Supported copper catalyst, process for its preparation and process for

Trifluoromethanesulphenyl chloride is prepared by reacting bis-(trifluoromethyl)disulfane in the liquid phase with chlorine in the presence of a strong acid.

Process for the preparation of trifluoromethanesulphenyl chloride

4-Substituted 5-chloro-2-hydrazinothiazoles of the formula ##STR1## in which R represents CHF.sub.2, CF.sub.3, CN or COOR.sup.1, where

4-substituted 5-chloro-2-hydrazinothiazoles

Process for the preparation of nuclear-fluorinated trifluoromethylbenzaldehydes from nuclear-chlorinated trifluoromethylbenzaldehydes, and new nuclear-fluorinated trifluoromethylbenzaldehydes.

Nuclear-fluorinated trifluoromethylbenzaldehydes

Unsymmetric biaryl compounds are prepared by coupling two different halogenoaromatics by reaction with a metal and carrying out the reaction in the presence of catalytic amounts of a nickel compound, a promoter and a phosphorus-containing ligand.

Process for the preparation of unsymmetric biaryl compounds

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Odenthal, Germany

Rudolf Braden