Basf Aktiengesellschaft

Manfred Eggersdorfer

Jochem Henkelmann

Hardo Siegel

Gerhard Heinz

Juergen Koch

Walter Grosch

Joachim Paust

Klaus Halbritter

Lothar Franz

Heinz Eckhardt

Karl Siegfried Brenner

Alfred Schuhmacher

Rolf Hartmuth Fischer

Rainer Becker

Wolfgang Harder

Peter Ittemann

Wilhelm Ruppel

Ludwig Schuster

Hagen Jaedicke

Walter Dobler

Dieter Voges

Paul Grafen

Joachim Meyer

Helmut Muenstedt

Hans-Juergen Gosch

Horst Zimmermann

Wolfgang Sauer

Gerhard Fritz

Klaus-Dieter Malsch

Hans-Ulrich Scholz

Hans-Juergen Scheiper

Klaas Jansen

Harald Schultheiss

Gerhard Schindler

Rainer Lowack

Ulrich Schaefer-Luederssen

Jochen Henkelmann

A process for the preparation of 1,2-propanediol by catalytic hydrogenation of glycerol at elevated temperature and elevated pressure, which comprises using glycerol having a water content of up to 20% by weight and a catalyst comprising the metals cobalt, copper, manganese and molybdenum in amounts of, based on the total weight of the catalyst,

Preparation of 1,2-propanediol

A process for preparing .alpha.-tocopherol or tocopheryl acetate by cyclocondensation of trimethylhydroquinone with phytol or isophytol in the presence of an acid catalyst and of a solvent and, where appropriate, subsequent acetylation, which comprises carrying out the cyclocondensation and, where appropriate, the subsequent acetylation in liquid or supercritical carbon dioxide as solvent.

Preparation of alpha-tocopherol and alpha-tocopheryl acetate in liquid

2-neopentylanthraquinone, processes for its preparation and methods for

Salts of riboflavin 5'-phosphate which are obtained by phosphorylation of riboflavin and reaction of the resulting riboflavin 5'-phosphate (5'-FMN), contaminated with unconverted riboflavin and isomeric riboflavin monophosphates and diphosphates, with an alkali metal hydroxide or a nitrogen base are purified by a process in which

Purification of salts of riboflavin 5'-phosphate, in particular of

Process for the preparation of 1,4-butanediol or tetrahydrofuran or both by the catalytic hydrogenation of maleic anhydride, succinic anhydride, maleic acid, succinic acid, fumaric acid, or the alkyl esters of these acids at temperatures of from 100.degree. C. to 350.degree. C. and pressures of from 50 bar to 350 bar over a catalyst containing cobalt as the active metal and one or both of the elements copper and phosphorus, if necessary in the presence of an aliphatic alcohol.

Preparation of 1,4-butanediol or tetrahydrofuran or both

1-tert-Butoxy-.omega.-alkenes of the general formula I

1-tert-butoxy-.omega.-alkenes and their use as scents

Cyclic N,N'-dimethylureas are prepared by catalytic hydrogenation of a cyclic urea which carries hydroxyl groups in the .alpha.-position to the two nitrogen atoms.

Preparation of cyclic N,N'-dimethylureas

Aromatics are acylated by the Friedel-Crafts method by carrying out the acylation in the presence of metalalkyls or metalalkyl halides of metals or semimetals of main groups two to five and/or of metals of subgroups two or four of the Periodic Table.

Acylation of aromatics

4,4-Dimethyltetrahydrofuran-2,3-dione is prepared by reacting a dimethylpyruvate (II) with formaldehyde or a formaldehyde donor at 80.degree.-150.degree. C.

Preparation of 4,4-dimethyltetrahydrofuran-2,3-dione

Highly heat-resistant polyaryl ether ketones are composed of

Highly heat-resistant polyaryl ether ketones

Alkyl-substituted aromatic ketones are prepared by reacting alkylbenzenes with carboxylic anhydrides in the presence of a Friedel-Crafts catalyst by performing the reaction in the presence of a tertiary amine or diamine.

Preparation of alkyl-substituted aromatic ketones

Polyaryl ether ketones are prepared by reacting aromatic dihydroxy compounds with aromatic dihalogen compounds in polar aprotic solvents in the presence of alkali metal carbonates, in particular by reacting aromatic dihydroxy compounds I ##STR1## or ring-substituted C.sub.1 -C.sub.8 -alkyl, C.sub.1 -C.sub.8 -alkoxy, aryl, chlorine or fluorine derivatives thereof, n and m each being 0 or 1, with aromatic dihalogen compounds ##STR2## or ring-substituted C.sub.1 -C.sub.8 -alkyl, C.sub.1 -C.sub.8 -alkoxy, aryl, chlorine or fluorine derivatives thereof, r and s each being 0 or 1, A being oxygen or a chemical bond and X being chlorine or fluorine.

Preparation of polyaryl ether ketones

Aryl ether ketones of the general formula I ##STR1## where n is from 0 to 5,

Aryl ether ketones

.beta.-Aryl alcohols for the general forumla I ##STR1## where R.sup.1, R.sup.2 and R.sup.3 are identical or different and each is hydrogen, C.sub.1 -C.sub.20 -alkyl, C.sub.5 -C.sub.7 -cycloalkyl, aryl, C.sub.7 -C.sub.12 -aralkyl or C.sub.7 -C.sub.12 -alkaryl, n is 0, 1, 2, 3 or 4, or where two adjacent R.sup.1 's are linked to form a 5- or 6-membered ring, are prepared by reacting an aromatic of the formula II ##STR2## with an alkylene oxide of the formula III ##STR3## where R.sup.1, R.sup.2 and R.sup.3 have the abovementioned meanings, in the presence of a Friedel-Crafts catalyst, by carrying out the reaction in the presence of a titanium(IV) alcoholate at from -20.degree. to +40.degree. C. in the presence or absence of a solvent.

Preparation of beta-aryl alcohols

Aldehydes and ketones of the general formula I ##STR1## where R.sup.1 is hydrogen or an organic radical of 1 to n carbon atoms and R.sup.2 is a non-aromatic organic radical of 1 to m carbon atoms, (m+n) ranging from 2 to 24 and R.sup.1 and R.sup.2 being combinable to form a 4- to 12-membered ring, are prepared in a continuous manner by oxidizing an alcohol of the general formula II ##STR2## with oxygen or an oxygen-containing gas at elevated temperatures in the gas phase in the presence of a catalyst, by effecting the oxidation by means of a supported catalyst composed of an inert carrier having a smooth surface and from 0.1 to 20% by weight, based on the amount of carrier, of an active layer of copper, silver and/or gold in a tubular reactor or tube bundle reactor where the internal diameter D of the tube or tubes ranges from 10 to 50 mm and the largest diameter d of the coated supported catalysts is subject to the relationship d=from 0.1 to 0.2 D.

Growing community of inventors

Frankenthal, Germany

Manfred Eggersdorfer