Basf Aktiengesellschaft

Herbert Krug

Toni Dockner

Uwe Kempe

Peter Magnussen

Werner Praetorius

Helmut Hagen

Matthias Irgang

Rolf Platz

Eckhard Hickmann

Manfred Sauerwald

Heinz Nohe

Ewald Gallei

Erich K Fehr

Jurgen Heners

Hans Joachim Szymanski

Helmut Schwarz

Preparation of unsaturated compounds by elimination reaction

Organic halogen compounds in which one or more halogen atoms are covalently bonded to the carbon are subjected to reductive dehalogenation by reaction with a hydrocarbon in the presence of carbon at elevated temperatures with formation of a hydrogen halide, by a process in which the dehalogenation is carried out in the presence of iron powder or an iron compound as a cocatalyst, at from 100.degree. to 450.degree. C.

Reductive dehalogenation of organic halogen compounds

Aliphatic, cycloaliphatic, aromatic or araliphatic halogen compounds are reductively dehalogenated by reaction with hydrocarbons in the presence of carbon in the liquid phase at from 100.degree. to 450.degree. C. with formation of hydrogen halides.

Reductive dehalogenation of halogen compounds

Quinoline and substituted quinolines are prepared by reacting aniline or a substituted aniline with an .alpha., .beta.-monounsaturated aldehyde in a high-boiling mineral oil by a method in which the high-boiling mineral oil is replaced when it becomes enriched with by-products, and the said mineral oil enriched with by-products is removed.

Preparation of quinolines

Organic condensation reactions are carried out at elevated temperatures by a method in which the starting material or materials are fed in, in gaseous form, at the bottom of a reactor charged with a mineral oil having a boiling point of not less than 150.degree. C., or are fed in, in liquid form, at the bottom of the reactor, and the mineral oil is kept at a temperature which is no lower than the boiling points, of the starting materials introduced as liquids, which correspond to the partial pressures, of the said starting materials, resulting at the bottom of the reactor, and the product is taken off, in gaseous form, at the top of the reactor.

Carrying out organic condensation reactions at elevated temperatures by

2-Imidazolines are prepared by reacting N,N'-diformyl-1,2-diamines in the gas phase at 200.degree.-350.degree. C., in the presence of certain amounts of an inert gas, over zinc oxide of a particular structure or over a mixture of this zinc oxide and aluminum oxide, as the catalyst. The 2-imidazolines obtainable by the process according to the invention are valuable starting materials for the preparation of dyes, crop protection agents and drugs.

Preparation of 2-imidazolines

Imidazoles are prepared by reacting 2-imidazolines at from 250.degree. to 500.degree. C. in the presence of molybdenum oxide and nickel oxide and/or cobalt oxide and aluminum oxide, silicon dioxide and/or silicates as catalysts. The imidazoles obtainable by the process according to the invention are valuable starting materials for the preparation of dyes, crop protection agents, textile auxiliaries, catalysts for polyurethanes and epoxy resins, surfactants and drugs, for example the corresponding nitroimidazoles.

Preparation of imidazoles

A novel process for the preparation of 2-imidazolines by reacting 1,2-diamines with nitriles or carbonyl compounds in the gas phase at from 200.degree. to 450.degree. C. in the presence of an oxide or phosphate of a metal of group 3 or 4 of the periodic table and/or in the presence of silicon dioxide. The 2-imidazolines obtainable by the process of the invention are valuable starting materials for the preparation of dyes, crop protection agents and drugs.

A process for the manufacture of carboxylic acid amides by addition reaction of water with nitriles in the presence of a catalyst which contains copper and magnesium silicate and has been treated with a reducing gas, to which catalyst cement of a certain particle size has been admixed. The amides obtainable by the process are starting materials for the manufacture of solvents, flocculants, wetting agents, pesticides, crop protection agents, textile assistants, e.g. brighteners, water repellent agents, foam stabilizers and detergents.

Manufacture of carboxylic acid amides

An improved process for the continuous production of N-alkylarylamines by reaction of arylamines with alkanols and/or dialkyl ethers in the gas phase at a temperature of from 180.degree. to 450.degree.C in the presence of carrier substances which contain an oxyacid of phosphorus. The improvement consists in using silicic acid having an internal surface area of from 50 to 500 square meters per gram and a content of from 0.1 to 20% by weight of phosphoric acid and in the continuous supply of phosphoric acid and/or an alkyl phosphate to the catalyst during the reaction. N-alkylarylamines are starting materials for the production of dyes, pesticides, plant protection agents and growth regulators. They are also suitable as additives to mineral oils or to coating compositions and other polymerized systems.

Growing community of inventors

Ludwigshafen, Germany

Herbert Krug