Ruhrchemie Aktiengesellschaft

Hoechst Aktiengesellschaft

Bayer Aktiengesellschaft

Maschinenfabrik Augsburg-nurnberg Aktiengesellschaft

M.a.n. Maschinenfabrik Augsburg-nurnberg A.g.

Hoeschst Aktiengesellschaft

Hoechst Ag Werk Ruhrchemie

Gebruder Grau & Co. K.g.

Wenzel & Weidmann G.m.b.h.

Jurgen Weber

Helmut Springer

Boy Cornils

Claus Kniep

Peter Lappe

Helmut Bahrmann

Wolfgang Bernhagen

Detlef Kampmann

Volker Falk

Hanswilhelm Bach

Bela Tihanyi

Werner DeWin

Werner De Win

Ernst Wiebus

Wolfgang Payer

Ludger Bexten

Hans Feichtinger

Heinz Grau

Peter Heymanns

Werner Konkol

Carl Dieter Frohning

Wolfgang Greb

Gerhardt Horn

Hans Tummes

Gerhard Diekhaus

August Muhlratzer

Heinz Kalbfell

Georg Dambkes

Franz Thonnessen

Edwin Erben

Carl D Frohning

Dieter Kupies

Harald Kappesser

Heinz-Dieter Hahn

Klaus Mathieu

Detlef Deymann

Waldemar Kascha

Wolfgang Nierhaus

Walter Rottig

Manfred Wilderson

Eberhard Von Mulmann

A process for the preparation of N-methylalkylamines of the formula CH.sub.3 --NH--CH.sub.2 --R in which R is an aliphatic radical having 1 to 3 carbon atoms, by reacting an aldehyde of the formula R--CHO with an amine of the formula R'--NH.sub.2 to give a Schiff base, removing the water of reaction, and reacting the Schiff base with methylamine and hydrogen in the presence of a hydrogenation catalyst.

Process for the preparation of N-methylalkylamines

Wastewaters resulting from preparation or use of paints comprising organic solvents are purified by extraction with higher monoalcohols, i.e. alcohols having at least 8 carbon atoms in the molecule.

Process for the removal of organic solvents from waste water

.alpha.-alkyl aldehydes having 8 to 17 carbon atoms are obtained from terminal olefins containing one less carbon atom. The olefins are first isomerized in the presence of iron carbonyl and then, without separating out the iron compound, hydroformylated in the presence of rhodium as catalyst.

Process for the preparation of .alpha.-alkyl substituted aldehydes

Isomeric mixtures of pentanoic acids are prepared by subjecting butene-1/butene-2 mixtures to hydroformylation to form aldehyde mixtures, followed by oxidation of the aldehyde mixtures which have been separated off from the reaction product. The hydroformylation is carried out in a heterogeneous system in the presence of rhodium catalysts which are dissolved in water. The mixture of isomeric 5 carbon monocarboxylic acids produced, when esterified with polyhydric alcohols, yields mixtures of isomeric esters which are useful as lubricants for refrigerant compressors operated with chlorine-free, at least partly fluorinated hydrocarbons as the refrigerant.

Mixtures of isomeric pentanoic acids, esters prepared therefrom, and

A process for the preparation of ethers of the formula R.sup.1 --CR.sup.2 .dbd.CH--O--R.sup.3, in which R.sup.1 and R.sup.3 are each a radical having 1 to 6 carbon atoms and R.sup.2 is hydrogen or a radical having 1 to 2 carbon atoms, by reaction of a diacetal of the formula R.sup.1 --CHR.sup.2 --CH(--O--R.sup.3).sub.2 in the presence of a catalyst composed of an acid and an amine at elevated temperature in the liquid phase. The unsaturated ether of the above-mentioned formula is formed from the diacetal with elimination of an alcohol R.sup.3 --OH.

Process for the preparation of unsaturated ethers

Process for the preparation of 5-alkylpyridine-2,3-dicarboxylic esters by reaction of 2-oxosuccinic esters with 2-alkylacrolein oximes.

Process for the preparation of esters of

A process for the preparation of amines by reaction of olefins with carbon monoxide, hydrogen, and a primary and/or secondary amine in the presence of rhodium and arylphosphines dissolved in water. Alkali metal salts, ammonium salts, and/or quaternary ammonium salts of sulfonated arylphosphines are used as the water-soluble arylphosphines.

Process for the preparation of amines

To prepare a mixture of oil-soluble iron and magnesium salts of saturated aliphatic C.sub.6 to C.sub.8 monocarboxylic acids, magnesium oxide is reacted with a C.sub.6 to C.sub.8 monocarboxylic acid in a solution of an iron salt of a saturated C.sub.6 to C.sub.8 monocarboxylic acid. The mixture is used as a combustion auxiliary.

Process for the preparation of mixtures of oil-soluble iron and

A method of preparation of a cobalt catalyst particularly adapted for hydrogenation of nitriles, the catalyst which is the product of the method, and the method of use thereof.

Catalysts and methods of separation thereof

A process for recovering rhodium from an aqueous solution containing its complex compounds and optionally complex ligands in the presence of a water-soluble salt of a carboxylic acid by treatment of the aqueous solution at 20.degree. to 120.degree. C. with hydrogen peroxide (or a substance forming hydrogen peroxide) and with oxygen (or an oxygen-containing gas). The rhodium is then removed as a water-insoluble compound.

Process for recovering rhodium

A process for the preparation of 2-(4-chlorophenyl)-3-methylbutyric acid from 4-chlorobenzaldehyde by conversion of the benzaldehyde to 3-(4-chlorophenyl)-2-methylpropenal, 3-(4-chlorophenyl)-2-methylpropanol, 1-(4-chlorophenyl)-2-methylpropene-1, and 2-(4-chlorophenyl)-2-methylbutyraldehyde, and finally to the desired corresponding butyric acid.

Process for the preparation of 2-(4-chlorophenyl)-3-methylbutyric acid

A process for the separation of 2-methylalkanals from a mixture thereof with at least one alpha unbranched aldehyde thereof comprising distillation of said mixture in the presence of formaldehyde and an aldolization catalyst whereby the alpha unbranched aldehydes are converted to alpha alkylacrolein and the 2-methylalkanals are recovered in a high purity.

Process for the separation of 2-methylalkanals from isomers thereof

The object of this invention is the preparation of .alpha.,.omega.-diamines from .alpha., .omega.-dialdehydes in a method which comprises the reaction of a starting mixture of said dialdehyde, a primary amine, and water to form a reaction mixture, followed by treatment of said reaction mixture with excess ammonia and hydrogen in the presence of a hydrogenation catalyst to produce a final mixture.

Process for the preparation of .alpha.,.omega.-diamines

Copper is separated from aqueous basic solutions by extraction with 3-hydroxy-2-alkylalkanaloxime or 2-hydroxymethyl-2-alkylalkanaloxime solution.

Process for separating copper from aqueous base solutions

A process for the preparation of tertiary N,N-dimethylamines by the reaction of primary amines, formaldehyde, and hydrogen under pressure and at elevated temperature in the presence of a nickel-containing hydrogenation catalyst in the liquid phase. The hydrogenation catalyst is suspended in a solvent, the nickel concentration is 0.1 to 10% by weight, based on the primary amine. The starting materials are separate from each other, brought to 80.degree. to 150.degree. C. and 1 to 15 MPa and fed into the catalyst suspension simultaneously with stirring and reacted in one step to form the tertiary N,N-dimethylamines.

Process for the preparation of tertiary N, N-dimethylamines

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Oberhausen, Germany

Jurgen Weber