Basf Aktiengesellschaft

Badische Anilin- & Soda-fabrik Aktiengesellschaft

Herwig Hoffmann

Siegfried Winderl

Herbert Mueller

Kaspar Bott

Wolfgang Schroeder

Herbert Toussaint

Karl Baer

Wolfgang Reiss

Otto H Huchler

Heinz Graefje

Gerd Kaibel

Dieter Voges

Max Strohmeyer

Wolfgang Koernig

Rudolf Irnich

Hans Peter Rath

Peter Zehner

Leopold Hupfer

Helmut Mach

Heinz Lingk

Peter R Laurer

Helmut Walz

Otto Kratzer

Hans-Ingo Joschek

Hubert Corr

Rudolf Schnur

Juergen Boudier

Guenther Boettger

Walter Himmele

Ludwig Schuster

Franz J Broecker

Rolf Schneider

Wolfgang Richter

Juergen Thomas

Peter Reuter

Michael R&ouml;per

Friedrich Wirth

Martin Decker

Heinrich-Josef Blankertz

Johannes E Schmidt

Armin Volker Grenacher

Horst Trapp

Arnold Wittwer

Hans Horler

Dieter Stuetzer

Volker Vogt

Ernst Hofmann

Walter Mesch

Dieter Stockburger

Harro Wache

Walter Scheidmeir

Eberhard Schaefer

Juergen Dehler

Paul Raff

Klaus Wintermantel

Bernhard Holzknecht

Guenther Nottes

Guenther Daumiller

Helmut Zinke-Allmang

Heinrich Elliehausen

Erich Flickinger

Wilhelm Schultz

Erich Weippert

Erich Haarer

Reinhold Plass

Karl Wilhelm Leonhard

Hans Joachim Pistor

Gotthilf Wenner

Klaus Adelsberger

The invention relates to a process for the preparation of saturated C -C -alcohols in which a liquid hydrogenation feed comprising at least one C -C -aldehyde is passed over a bed of a hydrogenation catalyst in the presence of a hydrogen-containing gas, which comprises adding to the hydrogenation feed an amount, homogeneously soluble therein, of a salt-like base. The addition of base suppresses side reactions, such as acetalization, aldolization, Tischtschenko reaction or ether formation.

Method of producing saturated C3-C20-alcohols

A process for the preparation of polyisobutene from isobutene and/or hydrocarbons containing isobutene in the presence of a complex of BF.sub.3 and an alcohol, wherein the free BF.sub.3 is substantially removed from the complex solution and/or from the reaction chamber.

Preparation of polyisobutene

Motor fuel compositions contain alkoxylation products of oxo oils or their fractions or esters thereof, which are alkoxylated with propene oxide and/or butene oxides and/or not more than minor aomunts of ethene oxide.

Motor fuel compositions containing alkoxylation products

##STR1## where R.sup.1 is an aromatic or heterocyclic radical, R.sup.2 is a straight-chain or branched alkyl raical and R.sup.3 is hydrogen, methyl or ethyl, are prepared by reacting a secondary alcohol of the formula ##STR2## with a primary alcohol of the formula R.sup.2 OH (III) in the presence of an alkali metal hydroxide at from 150.degree. to 300.degree. C.

Preparation of alkanols which are substituted in the 1 position by

Olefinically unsaturated compounds are hydroformylated continuously, the olefin being passed into the lower region of the reactor, under from 1 to 40 bar and at from 50.degree. to 140.degree. C. with the aid of a rhodium complex as a catalyst in a hydroformylation reactor having a liquid reaction zone which occupies about 60-85% of the reactor volume, the gaseous products and reactants being removed from the hydroformylation reactor, the products being isolated and the major part of the remaining gas being recycled to the reactor by the cycle gas method, by a process in which from 20 to 80% by volume of the cycle gas is fed into the hydroformylation reactor above the liquid reaction zone and/or below the liquid surface in the top fourth of the liquid reaction zone.

Continuous hydroformylation of olefinically unsaturated compounds

Preparation of C.sub.3 - to C.sub.25 -alkanols by catalytic hydrogenation of corresponding crude C.sub.3 - to C.sub.25 -alkanols, as obtained in the cobalt-catalyzed hydroformylation of C.sub.2 - to C.sub.24 -olefins, by partial 80-95% hydrogenation conversion in a first stage using a silica supported nickel and molybdenum oxide catalyst and then completing the conversion in a second stage using a cobalt catalyst containing copper, manganese, molybdenum and,optionally other activating additives. The process is especially adapted to the economic preparation of C.sub.9 -C.sub.11 - and C.sub.13 -C.sub.15 -alkanols which are used to prepare high-grade plasticizer esters.

Preparation of C.sub.3 -C.sub.25 -alkanols

Formamide is prepared continuously from methyl formate and ammonia, pure methanol being recovered, by a process wherein

Continuous preparation of furmamide

A process for the preparation of acetic acid esters CH.sub.3 --CO--O--R.sup.1 (I, R.sup.1 =an organic radical other than methyl and ethyl) by alkali-catalyzed trans-esterification of an acetic acid ester CH.sub.3 --CO--O--R.sup.2 (II, R.sup.2 =methyl or ethyl) with an alcohol R.sup.1 --OH (III), accompanied by elimination of the alcohol R.sup.2 --OH (IV), wherein

Continuous preparation of acetic acid esters

A process for the preparation of phthalic anhydride (PA) of catalytic oxidation of naphthalene or o-xylene with air, a preheated mixture of air and naphthalene or o-xylene being passed into a reactor charged with the catalyst, and the reaction gas leaving the reactor being passed through a separator in which the PA is separated out as a solid, in which process the air fed to the reactor is preheated, before or after the admixture of naphthalene or of o-xylene, by using it to cool the reaction gas in the PA separator.

Preparation of phthalic anhydride

Process for carrying out exothermic reactions between a gas and a liquid in the presence of a solid catalyst by passing the gas and the liquid cocurrently through a packed reaction vessel, preferably of elongated shape, wherein the gas and liquid pass through the packed reaction vessel in transition flow.

Carrying out exothermic reactions between a gas and a liquid

A process for the production of anhydrous or substantially anhydrous formic acid by hydrolysis of methyl formate which is carried out in a column having an upper fractionating section, a middle hydrolysis section and a lower extraction section and in which

Production of anhydrous or substantially anhydrous formic acid

Polytetramethylene ether glycols with molecular weights of from 300 to 4500 are produced by polymerizing tetrahydrofuran with an adduct of antimony pentachloride with carboxylic acids or carboxylic acid esters as the catalyst in the presence of a carboxylic acid anhydride, e.g., acetic anhydride, as the promoter. Esterified, e.g., acetylated, polytetramethylene ether glycols produced are subsequently converted to polytetramethylene ether glycols by saponification or transesterification. The process causes substantially less environmental pollution than do prior art methods, yet it is both economical and flexible.

Polymerization of tetrahydrofuran to prepare polytetramethylene ether

A process for the preparation of polybutylene glycol carboxylic acid diesters of the formula

Polymerization of tetrahydrofuran

Hexamethylenimine (azocycloheptane) is produced from hexamethylenediamine by elimination of ammonia in a high-boiling solvent at a low concentration of hexamethyleneimine.

Production of hexamethylenimine

A process for the manufacture of secondary amines, especially fatty amines, from alcohols and ammonia over a hydrogenating catalyst in the presence of hydrogen, in which the reaction mixture essentially consists of alcohol and the amine formed, with only little ammonia, the latter being added progressively and the water formed in the reaction being removed progressively.

Manufacture of secondary amines by alkylating ammonia with alcohols

Growing community of inventors

Frankenthal, Germany

Herwig Hoffmann