Basf Aktiengesellschaft

Badische Anilin- & Soda-fabrik Aktiengesellschaft

Herbert Mueller

Gerhard Jeschek

Rolf Hartmuth Fischer

Hans-Juergen Weyer

Otto H Huchler

Herwig Hoffmann

Roman Fischer

Dieter Voges

Siegfried Winderl

Herbert Toussaint

Willibald Schoenleben

Arnold Wittwer

Walter Mesch

Emil Scharf

Hartmut Axel

Franz Merger

Norbert Goetz

Wolfgang Schroeder

Wolfgang Straehle

Wolfgang Franzischka

Wolfgang Reiss

Joachim Streu

Klaus Pfleger

Juergen Schossig

Otto Hertel

Hans Hammer

Frank Werner

Peter Groll

Heinz Graefje

Christof Palm

Wolfgang Lengsfeld

Dieter Franz

Guenter Boettger

Klaus Broellos

Gerhard Paulus

Hubert Schoeppl

Hans Jochen Mercker

Gerhard Arnold

Guenther Nottes

Guenther Daumiller

Siegfried Schiller

A process for the preparation of dialkylamines of the general formula I, ##STR1## in which R.sup.1, R.sup.2, and R.sup.3 denote C.sub.1 -C.sub.12 alkyl, by the reaction of a dialkylamine of the general formula II ##STR2## in which R.sup.1 and R.sup.2 denote C.sub.1 -C.sub.12 alkyl, with alcohols R.sup.3 --OH in the presence of a (copper chromite/alkaline-earth metal chromite)-containing hydrogenation/dehydrogenation catalyst, in which the reaction is carried out in the liquid phase over a fixed bed catalyst in the presence of the water formed during the reaction at temperatures ranging from 180.degree. to 210.degree. C. and pressures ranging from 40 to 120 bar.

Preparation of tertiary amines

Polyoxyalkylene glycol monoethers of monohydric alcohols are prepared by a process in which tetrahydrofuran or a mixture of tetrahydrofuran 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 is polymerized in the absence of water and in the presence of a monohydric alcohol and of an anhydrous heteropoly acid catalyst.

Preparation of polyoxyalkylene glycol monoether of tert-butyl alcohol

Polyoxyalkylene glycol monoesters of carboxylic acids are prepared by a process in which tetrahydrofuran or a mixture of tetrahydrofuran 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 is polymerized in the absence of water and in the presence of a carboxylic acid and of an anhydrous heteropolyacid catalyst.

Preparation of polyoxyalkylene glycol monoesters of monocarboxylic acids

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

Polyoxyalkylene glycol monoethers of monohydric alcohols are prepared by a process in which tetrahydrofuran or a mixture of tetrahydrofuran 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 is polymerised in the absence of water and in the presence of a monohydric alcohol and of an anhydrous heteropoly acid catalyst.

Preparation of polyoxyalkylene glycol monoethers of monohydric alcohols

The average molecular weight of polyoxyalkylene glycols and polyoxyalkylene glycol derivatives is adjusted in the heteropolyacid-catalyzed polymerization of cyclic ethers and/or acetals with ring cleavage in the presence of proton donors by a process in which the amount of the relevant proton donor present in the reaction system is regulated in the course of the reaction by the measurement of the electrical conductivity.

Adjustment of the average molecular weight of polyoxyalkylene glycols

A process for preparing copolymers of ethylene with acrylic esters by copolymerizing 100 parts by weight of ethylene with from 0.1 to 25.0 parts by weight of acrylic ester in a continuous tubular polymerization system at from 500 to 4000 bar and from 100.degree. to 400.degree. C. in the presence of free radical polymerization initiators, comprises controlling the temperature for the reaction mixture, comprising ethylene, the acrylic ester, the polymerization initiator and optionally a regulator, after entry into the reaction zone in such a way that the ratio dT/dt (temperature increase per unit time) is kept constant at a value within the range from 1.5.degree. to 2.5.degree. C. per second.

Preparation of copolymers of ethylene with acrylic esters

A process for the reactivation of spent montmorillonite catalysts by thermal treatment, in which the spent catalysts are heated at a temperature of from 650.degree. to 850.degree. over a period of from 0.2 to 3 hours, and the montmorillonite catalysts thus obtained.

Reactivation of montmorillonite catalysts

The invention relates to thermoplastic polyurethane elastomers obtainable by reaction of

Thermoplastic polyurethane elastomers with a low degree of organic

Polyoxybutylene polyoxyalkylene glycol dicarboxylates are prepared by a process in which tetrahydrofuran is copolymerized with a molar excess of a 1,2-alkylene oxide in the presence of a carboxylic anhydride using, as a catalyst, a bleaching earth containing less than 3% by weight of water.

Preparation of polyoxybutylele polyoxyalkylene glycol dicarboxylates

A process is described for the preparation of high purity polymers or copolymers obtained by cationic polymerization of tetrahydrofuran and, if desired, alkylene oxide, in which hydrogen having a bubble diameter of less than 50 .mu.m is passed into the polymers in the presence of a hydrogenation catalyst.

Preparation of high purity polymers of tetrahydrofuran

A process for the preparation of polyether glycols by polymerization of tetrahydrofuran or copolymerization of tetrahydrofuran with oxiranes in the presence of from 20 to 500% w/w of a hydrocarbon, based on the weight of tetrahydrofuran used.

Process for the preparation of polyether glycols

A process is described for the purification of crude polyalkylene ether glycols contaminated by heteropolyacids or salts thereof, by treatment with solvents, which comprises mixing the crude polyalkylene ether glycols with a liquid hydrocarbon and water, allowing the phases to separate, and isolating the purified polyalkylene ether glycols from the upper phase.

Purification of heteropolyacid-containing polyalkylene ether glycols

Aminomono- or di-[(poly-n-butoxy)-n-butylamino]-(poly-n-butoxy)-n-butylamines of the general formula I

Aminomono- or

1,2,4-Butanetriol is prepared by catalytic hydrogenation of malic esters over a copper-containing catalyst by passing the esters over the fixed-bed catalyst at from 130.degree. to 190.degree. C. under hydrogen partial pressures of from 100 to 300 bar while substantially avoiding the formation of a gas phase.

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Frankenthal, Germany

Herbert Mueller