Bayer Aktiengesellschaft

Reinhard Schliebs

Hans-Dieter Block

Kurt-Wilhelm Eichenhofer

Werner Dietrich

Andrea La Spina

Karl-Heinz Mitschke

Karl-Friedrich Thom

Robert R Schmidt

Ludwig Eue

Hans-Heinrich Moretto

Wolfgang Hofer

Christian Rasp

Manfred Kapps

Armand De Montigny

Walter Radt

Johann Nikolaus Meussdoerffer

Friedrich Schwochow

Herbert Kallfass

Hans Toepsch

Hans Geffers

Manfred Wechsberg

Armand deMontigny

Hartmut Schulz

Hermann Brandl

Heinrich Kohnen

Novel phosphonomaleic acid esters of the formula ##STR1## in which R.sup.1 is an optionally substituted alkyl radical containing from 1 to 6 carbon atoms and, where n=0, may also be an optionally substituted aryl radical,

Process for producing phosphonomaleic acid esters

Addition compounds which contain phosphorus and their use as catalysts

A process for the production of a relatively high molecular weight phosphoric or phosphonic acid aryl ester, comprising reacting a phosphoric or phosphonic acid aryl ester with formaldehyde in the presence of sulphuric acid at a temperature from about 10.degree. to 120.degree. C. Advantageously, the aryl ester is of the formula ##STR1## in which R is a hydrogen atom, an alkyl group having from 1 to 6 carbon atoms, a halogen atom, an aryloxy group, or an aryl group;

Production of high viscosity phosphoric and phosphonic acid aryl esters

A compound adapted to be used to advantage as a catalyst for making carbodiimide foams is prepared by a process wherein (a) a phosphetane oxide or phosphetane sulphide of the general Formulae I and II: ##STR1## wherein X represents a C.sub.1 -C.sub.18 alkyl, C.sub.2 -C.sub.18 alkenyl, C.sub.6 -C.sub.14 aryl, C.sub.7 -C.sub.20 aralkyl, C.sub.1 -C.sub.18 alkoxy or C.sub.6 -C.sub.14 aroxy group and

Compounds containing phosphorous and a method for making

A process for the preparation of a 3,4-dihydroxy phsopholane oxide of the formula ##STR1## in which R.sup.1 represents an alkyl, alkoxy, alkenyl, alkenyloxy, alkinyl or alkinyloxy with up to 18 carbon atoms and substitution products thereof; aryl and aryloxy having up to 14 carbon atoms and substitution products thereof; cycloalkyl and cycloalkoxy having up to 6 ring carbon atoms and substitution products thereof; dialkylamino having up to 6 carbon atoms per alkyl radical and substitution products thereof; and N-hetero-radicals, and

Production of 3,4-dihydroxy phospholane oxides

In the production of isomeric five-membered ring cyclic unsaturated phosphine dichlorides by reacting an organophosphorus dichloride with a diene, the improvement which comprises carrying out the reaction in a carboxylic acid chloride. The product, without isolation, can be directly used in reaction with the carboxylic acid anhydride corresponding to the acid chloride to produce the phosphine oxide, the reaction producing additional acid chloride from the anhydride.

Production of cyclic five-membered ring unsaturated phosphine dichlorides

An organopolysiloxane/polycarbodiimide copolymer comprising optionally repeating structural units of the formula ##STR1## wherein R is an alkyl, alkenyl or aryl radical with up to 12 carbon atoms,

Polysiloxane/polycarbodiimide copolymers

A chlorosilane or partial hydrolysis product thereof is reacted with a siloxane and stable polymeric products of comparatively high molecular weight or high chlorine content are produced by effecting the reaction in the presence of a siloxane protonic acid equilibration catalyst in combination with a hydrogen halide acid. The hydrogen halide acid may be produced in situ. Representative protic acid equilibration catalysts include sulfuric acid, oleum, polysulfuric acids, sulfonic acids including aromatic, alkyl and perfluoroalkyl sulfonic acids, and polysulfonic acids.

Process for the preparation of linear and branched chlorosiloxanes

Certain novel 2-chloroethane-(thiono)-phosphonic acid amido compounds of the formula ##STR1## in which X and Y, which may be the same or different, are oxygen or sulfur,

Novel 2-chloroethane-(thiono)-phosphonic acid amido compounds and plant

A process for the production of N,N-bis-(2-hydroxyalkyl)-aminomethane phosphonic acid dialkyl esters of the formula ##STR1## in which R is an optionally substituted alkyl radical with 2 to 10 carbon atoms, and

Production of N,N-Bis-(2-hydroxyalkyl)-aminomethane phosphonic acid

A process for the purification of waste water produced in hydrazine production by the oxidation of ammonia or an amine with an oxidizing agent in the presence of an aldehyde or ketone, comprising intensively mixing the waste water with chlorine or a hypochlorite at a temperature of about 10.degree. C to 110.degree. C and a pH of about 5 to 10 until the treated waste water reaches a redox potential to platinum, relative to Ag/AgCl, of about -400 mV to +800 mV. Advantageously a small amount of waste water is distilled off both before and after the chlorine or hypochlorite treatment.

Purification of waste water from hydrazine production

A cyclic phosphine oxide of the formula ##STR1## in which R.sup.1 is an alkyl or an aryl radical having up to 14 carbon atoms,

Substituted cyclic phosphine oxides

A composition for coating paper, films and fiber materials, comprising

Non-stick polyorganosiloxane coating compositions

In the inhibition of corrosion and scale formation in a water-carrying system wherein to the water there is added a phosphonocarboxylic acid of the formula ##STR1## in which R is hydrogen, an alkyl, alkenyl or alkinyl radical having up to 4 carbon atoms, an aryl, cycloalkyl or aralkyl radical, or the radical ##STR2## R' is hydrogen, an alkyl radical having up to 4 carbon atoms or a carboxyl radical; and

Method for preventing corrosion in water-carrying systems

Certain novel .alpha.-alkyl-phosphonosuccinic acid compounds of the formula ##STR1## in which R is lower alkyl, or alkenyl or alkynyl, cycloalkyl, or aralkyl are particularly suitable as sequestering agents, e.g., for incorporation into cleansing compositions.

Growing community of inventors

Cologne, Germany

Reinhard Schliebs