Basf Aktiengesellschaft

Basf Wyandotte Corporation

Herbert Helfert

Martin Schmidt-Radde

Rolf Fikentscher

Pauls Davis

Johannes Perner

William K Langdon

Bernd Eck

Hans-Georg Scharpenberg

Jozsef Gerendas

Rudolf Rokohl

Jochem Henkelmann

Knut Oppenlaender

Albert Hettche

Thomas Ruhl

Marc Heider

Karl Stork

Paul Diessel

Rudolf Erich Lorenz

Stefan Weiss

Wolf-Dieter Balzer

Michele Vescia

Guenter Uhl

Rainer Blankenburg

Gerhard Laqua

Guenter Frey

Wolfram Dietsche

Dieter Wegerle

Stephan Scholl

Christoph Übler

J&ouml;rg Heilek

Bernhard Maltry

Ulrich Eiden

Hans-Peter Schildberg

Friedrich Reinert

Guenter Hatzmann

Brigitta Huckestein

Herbert Fleischer

Ernst Fuerst

Paul Richter

Reiner Hamm

Gunter Saladin

A process for working up residues from the preparation of pyrrolidone and/or N-vinylpyrrolidone comprises subjecting the residues to a thermolysis.

Method for processing pyrollidone and n-vinyl pyrollidone residues

The invention describes a process for the isolation of pure N-vinylpyrrolidone from N-vinylpyrrolidone-containing crude products, comprising a single-stage or multistage crystallization process, which comprises passing the mother liquor from the first crystallization stage either to a distillative and/or extractive purification, or returning it to an N-vinylpyrrolidone-containing product stream of the preparation process.

Method for obtaining pure n-vinyl pyrrolidone

A process for vinylation of an organic acidic-hydrogen compound, which entails reacting an organic acidic-hydrogen compound with acetylene or an acetylene-containing gas under elevated pressure and at elevated temperature in the presence of a base, wherein reactor regions initiating decomposition of acetylene are treated with an effective amount of a chemically inert oil of medium viscosity.

Prevention of spontaneous decomposition of gaseous acetylene

The preparation of monovinyl ethers of the general formula I ##STR1## in which A stands for a chemical bond or for a methylene or ethylene group, the radicals R.sup.1 and R.sup.2 independently stand for hydrogen, alkyl, cycloalkyl, or aryl groups or R.sup.1 and R.sup.2 together form a C.sub.3 -C.sub.5 alkylene bridging member, by the reaction of a diol of the general formula II ##STR2## in which the variables have the above meanings, with acetylene in the presence of a base, in which the reaction is carried out at 150.degree.-250.degree. C. under an acetylene partial pressure of 5-25 bar until 40-80% of the diol has been converted, at which point the reaction is stopped and the monovinyl ether of the formula I is isolated.

Preparation of monovinyl ethers

In a process for purifying N-vinylpyrrolidone by crystallization in a crystallizer, those surfaces of the crystallizer from which crystals grow during the crystallization are covered with an N-vinylpyrrolidone seed layer before the crystallization.

Purification of N-vinylpyrrolidone by crystallization

Chemical impurities contained in N-vinylpyrrolid-2-one are bound by a process in which the anhydride of an organic carboxylic acid is added to the crude N-vinylpyrrolid-2-one.

Binding chemical impurities contained in crude N-vinylpyrrolid-2-one

A lubricant for shaping polyvinyl chloride, which contains esters of oligomers of trihydric, tetrahydric, pentahydric or hexahydric aliphatic alcohols, having 3 or more monomer units, with saturated or unsaturated C.sub.8 -C.sub.36 -fatty acids, from 30 to 100% of the alcoholic hydroxyl groups being esterified.

Lubricants for shaping polyvinyl chloride, which contain esterified

A process for removing oligomer deposits from dyed and non-dyed textile materials which consist of polyester fibers or of blends of these fibers with other fibers, and from dyeing machinery, by a treatment with an aqueous, alkaline liquor which contains from 0.1 to 10 g/l of a quaternary ammonium compound carrying not less than two C.sub.6 -C.sub.22 -alkyl or -alkenyl groups on the quaternary nitrogen, at up to 100.degree. C. The oligomers are hydrolyzed and are removed together with the treatment liquor.

Removal of oligomer deposits from textile materials

Linear polypropylene ether glycols of high molecular weight are made by reacting a linear polypropylene ether glycol of lower molecular weight first with an alkaline agent such as sodium hydroxide or other suitable base to form an alcoholate, and then coupling the alcoholate with a suitable difunctional coupling agent, such as the benzene-sulfonic acid diester of ethylene glycol or with some other suitable arylsulfonic acid diester of a C.sub.2 to C.sub.6 alcohol, thereby obtaining a 100 percent linear polypropylene ether glycol of a desirably higher molecular weight. Materials so produced find use in an aqueous medium as defoaming agents, thickeners, or emulsifiers, and use as protective colloids to improve the low-temperature stability of polyurethane and other latices.

Linear polyalkylene ether glycols of high molecular weight

Solid cold bleach activator formulations for detergents which contain, as the active ingredient, a compound carrying acyl groups adsorbed on a three-dimensionally crosslinked water-insoluble inorganic compound having silicon-oxygen and/or aluminum-oxygen bonds.

Solid cold bleach activators for detergents and cleaning agents

Certain melamine derivatives are added as anti-foam agents to detergents, cleaners and rinses.

Process for suppressing the foaming of detergents

New polyether polyols of predetermined structure are prepared by reacting polyether bis alcoholates with selected bis epoxides. Specifically, a polyoxyalkylene glycol is converted to the bis alcoholate, and then the bis alcoholate is reacted with an equivalent amount of a glycol bis glycidyl ether, with the reactants being mixed together all at once. The polyether polyalcoholate thus obtained is converted to a high molecular weight polyether polyol by acid neutralization or ion exchange.

Polyether polyols and method of preparing same

Highly branched polyether polyols of high molecular weight (such as over 12,000) are made by coupling an alkoxylated polyglycerol, by reaction of the sodium alcoholate of the oxyalkylated polyglycerol with a dibenzenesulfo or ditoluenesulfo ester of a diol containing 2 to 6 carbon atoms. Products obtained are viscous resinous products which are particularly suitable for use as hydrophilic water-swellable gels and other purposes.

Highly branched polyether polyols of high molecular weight

Special quaternary ammonium salts derived from triaminoalkyl derivatives of hexahydrotriazine for use as retarders in the dyeing of anionic polyacrylonitrile fibers with basic dyes.

Dyeing process using quaternary ammonium salt as retarder

Cyclic acetals or ketals of carbonyl compounds having at least one aliphatic or aromatic radical, and polyhydric alcohols which have at least one more hydroxyl group than those required for acetalization, and which are furthermore oxyalkylated at the free hydroxyl group or groups.

Growing community of inventors

Frankenthal, Germany

Herbert Helfert