Basf Aktiengesellschaft

Otto Hertel

Emil Scharf

Gerhard Jeschek

Guenter Boettger

Rolf Hartmuth Fischer

Wolfgang Hoelderich

Herbert Mueller

Hans-Martin Weitz

Friedrich Linhart

Wolf D Mross

Hans Kiefer

Gerd Heilen

Wolfgang Schroeder

Theodor Weber

Wolfgang Koernig

Willibald Schoenleben

Hans Hammer

Jaroslav Melzer

Karl-Heinz Beyer

Wolfgang Lengsfeld

Gerald Lauterbach

Lothar Arnold

Klaus Wulz

Walter Klink

Albrecht H Wallis

Klaus Euler

Kamuran Izi

Fritz Rateike

.alpha.-Bisabolol is purified by distilling a plant extract containing .alpha.-bisabolol under reduced pressure and drawing off the purified .alpha.-bisabolol in the lower half of a distillation column as side product, and feeding in the extract above the side outlet.

Purification of .alpha.-bisabolol

1,4-Diacyloxybut-2-enes and 3,4-diacyloxybut-1-enes are converted into one another in the gas phase or liquid phase at from 100.degree. to 350.degree. C. under atmospheric or superatmospheric pressure in the presence of a zeolite as a catalyst.

Isomerization of diacyloxybutenes

A process for the preparation of pourable choline chloride/silica powders by mixing silica with choline chloride and, where appropriate, drying this mixture, wherein spray-dried or fluidized bed-dried silica which has a particle size of from 30 to 250 .mu.m is mixed with an aqueous choline chloride solution which contains from 70 to 80% by weight, based on the solution, of choline chloride and is at from 40.degree. to 80.degree. C., thereafter from 0.05 to 0.4% by weight, based on the mixture, of magnesium stearate or calcium stearate is added and, if appropriate, the resulting mixture is dried.

Preparation of pourable choline chloride/silica powders

Morpholine and other cyclic imines are obtained by reacting diethylene glycol and other appropriate diols with ammonia under hydrogenating conditions in the gas phase in the presence of a catalyst which contains copper, a smaller amount of nickel and alumina.

Preparation of morpholine

In preparing or reacting alkanolamines, especially at high temperatures, the use of substantially nickel-free alloy steels prevents corrosion and discoloration.

Process and apparatus for preparing or reacting alkanolamines

Ionones are prepared by cyclization of pseudoionone with concentrated sulfuric acid in the presence of an organic solvent or diluent, while cooling, and by dilution of the reaction mixture with water, by a continuous process in which the pseudoionone is combined with an aliphatic or cycloaliphatic hydrocarbon which boils at 25.degree.-65.degree. C. under the reaction conditions, or an aliphatic chlorohydrocarbon, and the sulfuric acid, with thorough mixing and evaporative cooling by partial or complete vaporization of the solvent present in the reaction mixture, combination being effected so that the temperature of the reaction mixture is from 25.degree. to 65.degree. C. and the residence time of this mixture before it is diluted with water is from 0.5 to 20, preferably from 0.1 to 5, seconds. The novel process can be used to prepare .alpha.- and .beta.-ionone in a technically simple and advantageous manner and in very good yields.

Preparation of ionones

Water-soluble, nitrogen-containing condensates are prepared by reacting a cross-linking agent, obtained by

Preparation of water-soluble, nitrogen-containing condensates and their

A process for the preparation of an aminoalkyl half-ester of sulfuric acid by simultaneously adding an aminoalkanol and sulfuric acid to a suspending medium, boiling at 70.degree.-150.degree. C., with vigorous mixing, distilling off the water formed during the reaction, and any water introduced with the starting materials, together with a part of the suspending medium, as an azeotrope, separating off the water from the condensed azeotrope and recycling the suspending medium, as a gas, to the reaction mixture.

Preparation of aminoalkyl half-esters of sulfuric acid

A process for the preparation of water-soluble polymeric crosslinking agents by a two-stage reaction of di-secondary diamines with epichlorohydrin and/or dichlorohydrin, wherein, in the first stage, di-secondary diamines are condensed with epichlorohydrin and/or dichlorohydrin in a molar ratio of from 1:0.5 to 1:1 at a pH of from 9 to 12, and in the second stage the condensates obtained in the first stage are reacted with additional epichlorohydrin and/or dichlorohydrin at a pH of from 4 to 8.5. The water-soluble condensates thus obtained are crosslinking agents for polyamines, polyamidoamines, ethyleneimine-modified polyamidoamines and polyether-amines. The crosslinking reaction gives water-soluble condensates, which possess a high cation activity and may be used as retention aids, drainage aids and flocculants in the manufacture of paper.

Preparation of water-soluble condensates and their use as crosslinking

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Ludwigshafen, Germany

Otto Hertel