Hoechst Aktiengesellschaft

Jurgen Grosse

Gunther R Schimmel

Werner Pieper

Werner Gohla

Ulrich Riegel

Friedrich Engelhardt

Werner Krause

Walter Dursch

Hans-Peter Rieck

Werner Klose

Thomas Staffel

Bernhard Hofmann

Horst Buhl

A plant for producing chain-type ammonium polyphosphate from ammonium orthophosphate and phosphorus pentoxide in the presence of gaseous ammonia comprises a reactor having rotatable mixing, kneading and comminuting tools in its interior and a feed pipe for the solid starting materials, an introduction pipe for ammonia, a gas discharge pipe and a discharge line for the reaction product, all of which are flow-connected to the interior of the reactor. The discharge line of the reactor is also connected for material flow to a mixing apparatus. A discharge device, which is controlled by the power consumption of the drive motor of the reactor, is arranged in the discharge line.

Plant for producing ammonium polyphosphate

The purification of phosphorous acid which is formed in halogenations of hydrocarbon derivatives using phosphorus trihalides is carried out in the context of preparing phosphorous acid in a reaction zone by reacting a mixture of phosphorus trichloride and water which has been finely divided by means of steam at temperatures between 150.degree. and 200.degree. C. in the gas phase. In this process, the liquid reaction product drains into a concentrating evaporation zone which has a downstream first separation zone. Inert gas is introduced to the lower part of the first separation zone. A melt is withdrawn from the first separation zone into a crystallizing zone. The waste gases from the reaction zone are treated with a washing liquid in a second separation zone before being passed into the atmosphere. The washing liquid used is an aqueous solution of never-purified phosphorous acid, which can have been prepurified by hydrolysis and stripping.

Process for purifying phosphorous acid

Process for the preparation of polymers of vinylphosphonic acid in water with the aid of catalysts which form free radicals, which comprises heating vinylphosphonic acid and (meth)acrylic acid to temperatures of 40.degree. to 120.degree. C. in water in the presence of 1 to 5.5% by weight of aliphatic peroxy esters and/or diacyl peroxides which dissociate by half in one hour at temperatures below 122.degree. C., the total amount of vinylphosphonic acid being taken together with up to 30% by weight, based on the total amount of monomer, of (meth)acrylic acid and the remainder of the (meth)acrylic acid being added in the course of the reaction. The copolymers are suitable for use in detergent and cleaning agents.

Process for the preparation of copolymers of vinylphosphonic acid and

A textile softening detergent composition contains from 5 to 70 wgt % surfactant, from 0.5 to 50 wgt % builder, from 1 to 20 wgt % crystalline laminated silicic acid and/or a corresponding alkali metal silicate and standard detergent aids. It is characterized in that the crystalline laminated silicic acid or its alkali metal salt of the general formula

Textile softening detergent composition

The disclosure relates to a process for making phosphonic anhydrides of general formula (I)

Process for making phosphonic anhydrides

The disclosure relates to a process for making phosphonic acid ester chlorides of the general formula (I)

Process for making phosphonic acid ester chlorides

The invention relates to a process wherein an alcohol and/or phenol is reacted with phosphorus pentasulfide in the presence of a catalyst which is selected from

Process for reacting alcohols and/or phenols with phosphorus pentasulfide

The invention relates to a process for oxidizing organic phosphorus compounds of the general formula (I)

Oxidizing phosphorus compounds with chlorosulfonic acid

The invention relates to an improved process for making amine salts of acid O,S-dialkylthiophosphoric acid esters of the general formula (I) ##STR1## in which R.sub.1 stands for the ammonium ion of primary or secondary aliphatic, cycloaliphatic or aromatic amines or of a heterocyclic nitrogen base and R.sub.2 and R.sub.3 each stand for an alkyl group by subjecting an O,O,S-trialkyl-thiophosphate to partial dealkylation and forming the salt of the dealkylated product by treatment with an amine corresponding to the ammonium ion R.sub.1. In the improved process an O,O,S-trialkylthiophosphate of the general formula (II) ##STR2## in which R.sub.2 and R.sub.3 have the meanings given above, is mixed with at least stoechiometric proportions of water and an amine corresponding to the ammonium ion R.sub.1, the resulting mixture is reacted, with agitation, over a period of about 3 to 8 hours at a temperature within the range 0.degree. to 120.degree. C., and the amine salt of the general formula (I) is separated from the reaction mixture.

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Hurth, Germany

Jurgen Grosse