Bayer Aktiengesellschaft

Haarmann & Reimer Gmbh

Hans-Helmut Schwarz

Otto Immel

Oskar Weissel

Bernd-Ulrich Kaiser

Rudolf Braden

Rainer Neumann

Harry Danziger

Gerhard Friedhofen

Klaus Starke

Albrecht Marhold

Dieter Freitag

Volker Serini

Heinrich Krimm

Jurgen Heuser

Reinhard Thiel

Eberhard Bandtel

Hermann-Dieter Krall

Hein Quast

Helmut Waldmann

Dietmar Bielefeldt

Gerhard Darsow

Michael Negele

Karl-Rudolf Gassen

Manfred Lenthe

Jurgen Kadelka

Friedhelm Sahlmen

Hanno Henkel

Horst Koller

Hermann Schnell

Gunther Jeromin

Dieter Nachtsheim

Guido Rampart

Karl-Heinz Arnold

Andre De Jager

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

Water-insoluble chlorinated hydrocarbons can be largely degraded by mixing with nitric acid and heating to temperatures of 150.degree. C. to 350.degree. C. under pressures of 6 bar to 350 bar.

Process for the oxidation of water-insoluble organic compounds

Hexafluoropropanes of the formula CF.sub.3 -CHX-CF.sub.3 where X is hydrogen or chlorine are prepared by reacting hexachloropropene with hydrogen fluoride in the gas phase in the presence of a catalyst.

Process for the preparation of 1,1,1,3,3,3-hexafluoropropane and

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

Substituted or unsubstituted cyclohexylamine and substituted or unsubstituted dicyclohexylamine can be produced by catalytic hydrogenation of substituted or unsubstituted aniline by using a ruthenium catalyst which in addition to ruthenium also contains palladium, platinum or palladium and platinum on a support from the group consisting of Al.sub.2 O.sub.3 and aluminum spinel treated with chromium and manganese and containing the noble metals in a total amount of 0.05-5% by weight and a weight ratio of Ru:Pd, Ru:Pt, or Ru:Pd/Pt of 1:9-9:1. All percentages are based on the total weight of the catalyst.

Ruthenium supported catalyst, its preparation and its use in the

Substituted or unsubstituted cyclohexylamine and substituted or substituted dicyclohexylamine can be produced by catalytic hydrogenation of substituted or unsubstituted aniline, for which a catalyst is used containing ruthenium and palladium which are attached to a support and which catalyst furthermore contains a basic alkali metal compound. The catalyst contains the noble metals in a total amount of 0.05 to 5% by weight and in a weight ratio of ruthenium to palladium such as 1:9-9:1. The basic alkali metal compound is present in an amount of 0.1-10% by weight. All percentages are based on the total weight of the catalyst.

Ruthenium catalyst, process for its preparation and process for the

Optionally substituted cyclohexylamine and optionally substituted dicyclohexylamine can be obtained by the catalytic hydrogenation of optionally substituted aniline, a ruthenium catalyst which is supported in Al.sub.2 O.sub.3 treated with compounds of rare earth metals and of manganese and which has a ruthenium content of 0.05-5% by weight, relative to the total weight of the catalyst, being employed.

Supported ruthenium catalyst, its preparation and its use in the

Diphenylamine which is unsubstituted or substituted by alkyl or alkoxy groups can be prepared by treating appropriately substituted dicyclohexylamine with 1-10 bar of H.sub.2 over catalysts containing 0.05-5% by weight of rhodium at 250.degree.-450.degree. C. In addition to rhodium, the catalysts contain at least one other platinum metal from the group consisting of palladium, platinum and iridium on a support containing the noble metals in a total amount of 0.05-5% by weight, the percentage by weight of rodium with respect to all noble metals being 10-90%, and furthermore containing additives of 1-6% by weight of an alkali metal hydroxide and 1-6% by weight of an alkali metal sulphate. All percentages are based on the total weight of the catalyst.

Rhodium catalysts, process for their preparation and process for the

A process for the preparation of Schiff's bases which contain amino groups, of the formula ##STR1## wherein n is 3 to 12, by reacting cyclic lactams of the formula ##STR2## wherein n is 3 to 12, or of their ring-opened polymers of the formula ##STR3## wherein n is 3 to 12 and

Process for the preparation of Schiff's bases

A supported catalyst containing rhodium and compounds of chromium, manganese, alkali metals and, if appropriate, compounds of sulphur is prepared by first applying compounds of chromium and manganese to the catalyst support, subsequently heating the catalyst support thus charged to elevated temperatures and then impregnating it with a rhodium solution, drying it, treating it with an alkali metal solution and, if appropriate, applying sulphur compounds to the catalyst support thus treated. The supported catalyst thus prepared can be used for the dehydrogenation of compounds and/or compound mixtures consisting of completely and/or partly hydrogenated hydroxydiphenyl.

Supported catalyst, process for its preparation and its use for the

Substituted succinic acid amides, in particular substituted succinic acid amides containing differing derivative groups, are prepared by reacting unsaturated carboxamides with carbon monoxide and with a nucleophilic component containing at least one mobile hydrogen atom, in the presence of cobalt compounds and, if appropriate, in the presence of one or more tertiary nitrogen bases, under an elevated pressure and at an elevated temperature.

Process for the preparation of substituted succinic acid amides

Trimethylolpropane is prepared in such a manner that butyraldehyde is metered into a mixture of water, alkaline condensing agent and formaldehyde, which contains less than 0.1 mol of methanol relative to 1 mol of formaldehyde, at temperatures from 15.degree. to 50.degree. C., and after addition of the butyraldehyde the reaction mixture is heated up to 90.degree. C., sufficient water being present in the reaction mixture so that the reaction mixture has a content of trimethylolpropane of 5 to 25% by weight after the reaction.

Process for the preparation of trimethylolpropane

This disclosure relates to the processes for producing polycarbonates from specific crude bisphenols. The bisphenols are characterized in that immediately after their preparation they are subjected to (i) separation, of excess phenols and low-boiling substances, by means of an evaporator, and (ii) removal of monophenols by desorption. The invention also relates to high-molecular weight aromatic polycarbonates made of crude bisphenols and their use in a variety of applications.

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Krefeld, Germany

Hans-Helmut Schwarz