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Basfaktiengesellschaft

Basf Aktiengsellschaft

Rolf Fischer

Claus-Ulrich Priester

Franz Merger

Uwe Vagt

Wolfgang Harder

Rolf Hartmuth Fischer

Friedrich Towae

Gerhard Nestler

Tom Witzel

Gerd Fouquet

Richard Krabetz

Wolfgang Hoelderich

Martin Brudermueller

Hans-Martin Hutmacher

Franz J Broecker

Gerd Duembgen

Juergen Frank

Wolfgang Schwarz

Juergen Paetsch

Leopold Hupfer

Matthias Schwarzmann

Karl Baer

Martin Schmidt-Radde

Heinrich Adolphi

Rudolf Kummer

Werner Bertleff

Heinz-Walter Schneider

Wolf D Mross

Dieter Voges

Hans-Juergen Weyer

Max Strohmeyer

Manfred Sauerwald

Helmut Lermer

Fritz Thiessen

Gerhard Laqua

Johann-Peter Melder

Ulrich Hammon

Arno Lange

Guenter Hansen

Karl Kiehs

Johannes Perner

Eberhard Fuchs

Rolf Platz

Georg Zeidler

Klaus Volkamer

Siegfried Winderl

Paul Diessel

Wolfgang Schroeder

Wolfgang Richter

Michael Roeper

Alfred Lindner

Dieter Stoeckigt

Herbert Vogel

Peter Magnussen

Hans-Juergen Gosch

Karl-Heinz Boehning

Bernd Bruchmann

Jochem Henkelmann

Klaus Ebel

Rainer Becker

Michael Hesse

Knut Oppenlaender

Helmut Hagen

Rocco Paciello

Peter Bassler

Christoph Kuenast

Hans Theobald

Toni Dockner

Hardo Siegel

Herbert Mueller

Peter Hofmeister

Walter Himmele

Hans-Martin Weitz

Guido Voit

Werner Steck

Heinz Eilingsfeld

Matthias Irgang

Ludwig Schuster

Michael Röper

Heinz-Josef Kneuper

Hans Renz

Detlef Kratz

Roland Minges

Manfred Schwartz

Rudolf Kropp

Andreas Stange

Juergen Hartig

Ulrich Wagner

Heinz Auer

Rainer Buerstinghaus

Klaus Mundinger

Rainer Hummerich

Wolfram Weiss

Uwe Kempe

Theodor Weber

Heinz Hohenschutz

Erich Penzel

Ulrich Koehler

Gerhard Jeschek

Wolfgang Koernig

Hans Volkmar Schwarz

Alcohols are prepared by the catalytic hydrogenation of the corresponding carbonyl compounds at elevated temperatures and at superatmospheric pressure in the liquid phase by a process in which the catalyst used contains copper on an SiO,-containing carrier in the presence or absence of one or more of the elements magnesium, barium, zinc and chromium.

Preparation of alcohols

(Cyclo)aliphatic polyisocyanate compositions which have a long shelf life, are obtainable by phosgene-free methods, preferably by thermal cleavage of (cyclo)aliphatic polycarbamates, and, for stabilization, contain at least one primary stabilizer (2a), preferably a sterically hindered phenol and/or an aromatic amine, or at least one secondary stabilizer (2b), preferably an organic phosphite and/or a thioether, or at least one acidic stabilizer (2c), preferably a carboxylic acid, an acyl chloride, an inorganic acid, an inorganic acid chloride and/or a diester of phosphoric acid, or a stabilizer system comprising at least 2 of the stabilizers (2a) to (2c), a process for the preparation of the (cyclo)aliphatic polyisocyanate compositions and their preferred use for the preparation of isocyanurate-containing polyisocyanates.

Polyisocyanate compositions having a long shelf life and obtainable by

Aldehydes with a higher number of carbon atoms and high selection are prepared by reacting olefins, in particular from petrochemical refinery products, by a hydroformylation with aldol condensation using a mixed catalyst of rhodium-carbonyl-phosphines and Mannich catalyst.

Preparation of higher aldehydes

In a reactor for the thermal cleavage of mono- and polyfunctional carbamic esters into the corresponding isocyanates and the hydroxyl component in the liquid phase, the geometry of the reactor, defined by the degassing area in relation to the volume and the arrangement of the heating surfaces, permits cleavage in a two-phase mixture which has a volumetric gas content of more than 50%.

Thermal cleavage of carbamic esters

The preparation of 2-substituted but-2-ene-1,4-dial-4-acetals of the formula I ##STR1## in which the substituents R.sup.1 to R.sup.4 stand for hydrogen or C.sub.1 -C.sub.6 aliphatic radicals, and R.sup.2 and R.sup.3 or R.sup.1 and R.sup.2 are in each case common members of an aliphatic 4-membered to 7-membered ring, which can contain a hetero atom, and R.sup.5 denotes an alkyl, alkenyl, or alkynyl radical having from 1 to 12 C atoms, which can be substituted by cycloaliphatic, aromatic or heterocyclic radicals or by hydroxy, ether, thioether, acyl, alkylamino, carboxy, or carbalkoxy groups, an optionally substituted aryl radical or an alkoxy, alkylthio, or acyloxy group, wherein

Preparation of 2-substituted but-2-ene-1,4-dial-4-acetals and novel

Hemiacetals of glyoxal monoacetals are useful as intermediates to prepare 2-substituted but-2-en-1,4-dial-4-acetals of the general formula I; ##STR1##

Preparation of 2-substituted but-2-ene-1, 4-dial-4-acetals and novel

Novel 2,2 -dialkylpentane-1,5-diisocyantes, 2,2-dialkylpentane-1,5-diurethanes and 2,2-dialkylpentane-1,5-dicarbamoyl chlorides of the formula ##STR1## where R.sup.1 and R.sup.2 are identical or different linear C.sub.1 -to C.sub.12 -alkyl, branched C.sub.3 - to C.sub.12 -alkyl, branched C.sub.2 - to C.sub.12 -alkenyl or branched C.sub.4 - to C.sub.12 -alkenyl,

2,2-dialkylpentane 1,5-diisocyanates, 2,2-dialkylpentane 1,5-diurethanes

2-Methyl-1,4-butanediol and 3-methyltetrahydrofuran are prepared by reacting a compound of the general formula I or II ##STR1## where R.sup.1 and R.sup.2 are each hydrogen or C.sub.1 -C.sub.8 -alkyl and the formyl group of II may also be present as acetal with a C.sub.1 -C.sub.8 -alkanol, is reacted with hydrogen in the presence of copper or of a metal of groups 7 to 10 of the Periodical Table of elements or of a compound of these metals.

Preparation of 2-methyl-1,4-butanediol and 3-methyltetrahydrofuran

A process for the preparation of 3-cyano-3,5,5-trimethylcyclohexanone by the reaction of isophorone with hydrogen cyanide in the presence of quaternary ammonium catalysts at temperatures ranging from 80.degree. to 180.degree. C. and pressures ranging from 0.5 to 20 bar, in which the ammonium catalysts used are salts of the general formula I ##STR1## in which R.sup.1, R.sup.2, R.sup.3, R.sup.4 denote C.sub.1 -C.sub.18 alkyl, C.sub.5 -C.sub.8 cycloalkyl, aryl, C.sub.7 -C.sub.18 aralkyl or C.sub.2 -C.sub.18 hydroxyalkyl and

Preparaion of 3.cyano-3,5,5-trimethylcyclohexanone

Polyisocyanates containing isocyanurate groups are prepared by a partial trimerization of (cyclo)aliphatic diisocyanates in the presence of at least one trimerization catalyst selected from the group consisting of tetraalkylammonium alkyl carbonates of the formula (I) ##STR1## (quaternary ammonioalkyl) carbonates having a betaine structure of the formula (II) ##STR2## and the preferred use of the polyisocyanates containing isocyanurate groups which are obtainable in this way is aspolyisocyanate component in polyurethane finishes.

Preparation of polyisocyanates containing isocyanurate groups and use

A process for the preparation of aminopropionitriles of the general formula I ##STR1## in which R denotes hydrogen or methyl, wherein ammonia is caused to react with an acrylonitrile of the general formula II ##STR2## In which the substituent has the aforementioned meanings, in a molar ratio of from 1:1 to 500:1 over a heterogenic catalyst at temperatures ranging from 40.degree. to 180.degree. C. and pressures ranging from 10 to 350 bar.

Preparation of aminopropionitriles

Polyoxyalkylene glycols are prepared by a process in which tetrahydrofuran is polymerized with a total of not more than 95 mol %, based on the amount of tetrahydrofuran used, of one or more comonomers from the group consisting of the cyclic ethers and acetals in the absence of water and in the presence of a monohydric alcohol or of a monocarboxylic acid with the aid of an anhydrous heteropoly acid catalyst, and the polyoxyalkylene glycol is liberated from the resulting polyoxyalkylene glycol monoethers or polyoxyalkylene glycol monoesters by cleavage of the monoether or monoester bond.

Preparation of poloxy-alkylene glycols

1,1'-bis(3-aminopropyl)-2,2'-diimidazole of the formula I ##STR1## is prepared by a novel process in which 2,2'-diimidazole of the formula II ##STR2## is reacted with acrylonitrile of the formula III ##STR3## in the presence of basic catalysts at from 80.degree. to 150.degree. C., and hydrogenation is carried out with excess hydrogen in the presence of ammonia on catalysts which contain cobalt, nickel, ruthenium and/or noble metals at from 40.degree. to 200.degree. C. under from 10 to 200 bar.

1,1'-bis(3-aminopropyl)-2,2'-diimidazole

A multistep process for the continuous preparation of organic polyisocyanates, preferably aliphatic or cycloaliphatic diisocyanates, by reacting the corresponding organic polyamines with carbonic acid derivatives and alcohols to give monomeric polyurethanes and pyrolyzing the latter involves separating the resultant polyisocyanates and worthless residues in certain reaction steps and recycling the reusable by-products into earlier steps.

Multistep, continuous preparation of organic polyisocyanates

4-Acetoxystyrene of the formula I ##STR1## is prepared by a process in which a 1-(4-acetoxyphenyl)ethyl carboxylate of the formula II ##STR2## where R is C.sub.1 -C.sub.10 -alkyl, C.sub.3 -C.sub.6 -cycloalkyl, aryl or C.sub.7 -C.sub.10 -aralkyl, is converted in the presence of an acidic catalyst and of a polymerization inhibitor in an inert heat transfer medium at from 160.degree. to 250.degree. C. and from 0.1 to 300 mbar.

Preparation of 4-acetoxystyrene

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Frankenthal, Germany

Franz Merger