Abstract: 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.

Abstract: 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.

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

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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 andm is 1 to 100,000,with inorganic bases at elevated temperature, the reaction being carried out in the presence of inert, high-boiling suspending agents.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: A process for the production of mixtures of alkylated aromatic polyhydroxy compounds by reacting alkylated phenols with carbonyl compounds, wherein acidic organic ion exchangers are used as catalysts and commercial dialkyl phenols as the phenol and any unreacted starting phenols separated off are completely recycled into the process without intermediate purification, and the application of the thus produced polyhydroxyl compounds for making thermoplastic polycarbonates.

Abstract: A process for the preparation of a 4,4'-dihydroxy-3,3',5,5'-tetraalkyl-diphenylalkane by reacting a 2,6-dialkyl phenol with a ketone in the presence of an acid organic ion exchanger wherein said acid ion exchanger is a macroporous resin with an average pore diameter of at least 300 A.

Abstract: Procecss for the preparation of alkyl aryl ethers by reacting phenols with aliphatic ethers in the presence of strongly acid cation exchangers.

Abstract: A process for the preparation of 2,2-dimethylolalkanals is disclosed wherein formaldehyde is reacted with an aldehyde of the formulaRCH.sub.2 CHO (I)whereinR denotes a straight-chain or branched alkyl radical with up to 12 carbon atoms where the radical can be substituted by an alkyl or alkoxy group with 1 to 3 carbon atoms in each case wherein the molar ratio of aldehyde of formula I to formaldehyde is 1:8 to 20, the reaction being carried out at a temperature in the range of 5.degree. to 100.degree. C. in the presence of 0.01 to 0.5 mol (per mol of aldehyde of formula (I)) of a catalyst consisting essentially of a hydroxide or carbonate of an alkali metal or alkaline earth metal or an unbranched tertiary aliphatic amine.

Abstract: An improvement in a process for the preparation of 2,2-dimethylolalkanal of the formula ##STR1## where R denotes an optionally substituted aliphatic radical by reacting 2-alkylacrylaldehyde with formaldehyde in presence of water and a base, the improvement residing in employing an aldehyde of the formula ##STR2## wherein R has the meaning indicated above and a mol ratio of the same to formaldehyde of 1:8-30 at a temperature in the range from -10 to 100.degree. C.