Abstract: A process for the preparation of N-phosphonomethylglycine by reaction of aminomethanephosphonic acid and glyoxylic acid in the molar ratio 1:2 in aqueous medium.

Abstract: Organic chlorophosphanes of the formula III ##STR1## in which R.sup.1 is chlorine or an aliphatic radical, preferably only chlorine, andR.sup.2 is an aromatic, heterocyclic or aliphatic radical,are prepared by reacting organic phosphorus oxychlorides of the formula I ##STR2## in which R.sup.1 is chlorine or an aliphatic radical, preferably only chlorine,R.sup.2 is an aromatic or heterocyclic radical in the event that R.sup.1 is chlorine and an aromatic, heterocyclic or aliphatic radical in the event that R.sup.1 is an aliphatic radical,with a trialkylphosphane of the formula II(R.sup.3).sub.3 P (II)in which R.sup.3 is an aliphatic radical, at temperatures between about 20.degree. and about 170.degree. C. Said organic chlorophosphanes III are mainly intermediates in various fields, such as pharmaceuticals, plant protection, dyestuffs and polymers.

Abstract: Organic chlorophosphanes of the formula II ##STR1## in which R.sup.1 =an aromatic or heterocyclic radical and R.sup.2 =an aliphatic radical or Cl are prepared by reacting organic phosphorus oxychlorides of the formula I ##STR2## in which R.sup.1 and R.sup.2 have the meaning mentioned above with triphenylphosphane (C.sub.6 H.sub.5).sub.3 P at an elevated temperature. The organic chlorophosphanes II are, in the main, intermediates in various specialized fields, such as the pharmaceuticals, plant protection, dyestuffs and polymers sectors.

Abstract: The alkali metal and alkaline earth metal salts of diarylphosphinic acids are prepared by reacting triarylphosphane oxides with alkali metal or alkaline earth metal hydroxides in a molar ratio of about 1:1 or 0.5, in the presence of water, under elevated pressure and at elevated temperature. In this manner, the alkali metal or alkaline earth metal salts of diphenylphosphinic acid are formed from triphenylphosphane oxide, which is the preferably used triarylphosphane oxide.Other salts or the corresponding free diarylphosphinic acids can, if desired, be obtained from the alkali metal and alkaline earth metal salts in a conventional manner. The products are principally intermediates in various fields.

Abstract: Crosslinked copolymers wherein crosslinking is effected with crosslinking bridge members of the formula ##STR1## wherein R.sup.1 and R.sup.2 independently of one another are each hydrogen or alkyl with 1 to 4 carbon atoms and m represents a number from 0 to 6 are prepared by copolymerization of monomers with vinylphosphonic acid (ester)-anhydrides and the new crosslinked polymers according to the invention are suitable for the preparation of acid-soluble coatings and encapsulation materials.

Abstract: A process for the preparation of vinylphosphonic acid dichloride and 2-chloroethanephosphonic acid dichloride, wherein 2-chloroethanephosphonic acid derivatives containing 2-chloroethyl ester groups, as produced in the Arbusow rearrangement of tris-chloroethyl phosphite, are heated to 150.degree. to 230.degree. C. in a first stage, and, in a second stage, the residual reaction mixture is reacted with phosgene at 90.degree.-200.degree. C., in the presence of basic catalysts or of alkali metal salts as catalysts, and in the presence of phosphonic acid dichlorides.

Abstract: Chlorodiphenylphosphane is prepared by reacting dichlorophenylphosphane with triphenylphosphane at temperatures between about 300.degree. and 700.degree. C. In the temperature range from about 300.degree. to 500.degree. C., this reaction is preferably carried out under elevated pressure, in particular under the autogenous pressure which becomes established in a sealed system, while atmospheric pressure is preferably used in the temperature range from about 500.degree. to 700.degree. C.The reaction product chlorodiphenylphosphane is in the main an intermediate in various fields, such as, for example, the polymer sector.

Abstract: Chlorophenylphosphanes of the formula(C.sub.6 H.sub.5).sub.n PCl.sub.3-nin which n=1 or 2, are prepared by reacting triphenylphosphane, (C.sub.6 H.sub.5).sub.3 P, with phosphorus trichloride, PCl.sub.3, at temperatures between about 320.degree. and 700.degree. C.; in the temperature range between about 320.degree. and 500.degree. C. the reaction is preferably carried out under elevated pressure, in particular under autogenous pressure, while in the temperature range between about 500.degree. and 700.degree. C. atmospheric pressure is preferably used. The composition of the final product can be controlled by the choice of the molar ratio of the starting materials.The final products dichlorophenylphosphane and chlorodiphenylphosphane are mainly intermediates in various fields, such as, for example, the crop protection and the polymer sectors.

Abstract: A method for making a vinylphosphonic acid diester of the formulaCH.sub.2 .dbd.CH--P(O)(OR).sub.2by heating a dialkyl 2-acetoxyethane phosphonate of the formulaCH.sub.3 COOCH.sub.2 CH.sub.2 P(O)(OR).sub.2in the presence of an acidic or basic catalyst and reacting the resulting product with an orthoester of the formulaR.sup.1 C(OR).sub.3.

Abstract: Phosphonous acids are obtained by hydrolysis of dichlorophosphanes with water at temperatures of about 60.degree. to about 100.degree. C., preferably of about 80.degree. to about 95.degree. C.

Abstract: Dialkylphosphinic acid halides are prepared by reaction of dialkylphosphinic anhydrides with hydrogen halide at temperatures of from about 140.degree. to 250.degree. C. The hydrogen halide--preferably hydrogen chloride or bromide--is advantageously introduced in excess at a rate of from about 3 to 10 mols per mol of dialkylphosphinic anhydride an hour into the anhydride which is liquid or dissolved in an inert solvent.The reaction products are mainly intermediates in the field of plant protection and flameproofing agents.

Abstract: Monoalkyl phosphonites are prepared by the esterification of phosphonous acids with alcohols at temperatures of about 125.degree. to about 220.degree. C., preferably of about 130.degree. to about 180.degree. C.

Abstract: Process for the preparation of vinylphosphonic acid dichloride and 2-chloroethanephosphonic acid dichloride, by heating a 2-acetoxyethanephosphonic acid dialkyl ester of the general formula ##STR1## wherein R denotes alkyl groups having 1 to 4 carbon atoms, in the presence of acid or basic catalysts at 150.degree.-270.degree. C. with elimination of an alkyl acetate, reacting the resulting reaction mixture with water at temperatures between 130.degree.-230.degree. C. while simultaneously distilling off the alcohol formed, and reacting the crude vinylphosphonic acid thus formed with phosgene in the presence of catalysts and also in the presence of phosphonic acid dichlorides.

Abstract: A process for the preparation of vinylphosphonic acid derivatives by heating 2-chloroethanephosphonic acid derivatives which contain 2-chloroethyl ester groups to temperatures of from 150.degree. to 230.degree. C.

Abstract: To prepare compounds containing carboxylic acid amide groups, in particular peptides, there are reacted compounds containing a carboxy group, in the presence of dialkylphosphinic acid anhydrides with compounds containing a free amino group.

Abstract: Disclosed is a cellulose ether having at least one phosphorus-containing substituent or a mixed ether of said cellulose ether having in addition at least one phosphorus-free substituent comprising alkyl, hydroxyalkyl, carboxyalkyl, sulfonoalkyl, aminoalkyl, or diaminoalkyl, wherein the phosphorus-containing substituent(s) comprise(s) groups of the formula ##STR1## wherein R.sup.1 and R.sup.2 are OX; or R.sup.1 is OX and R.sup.2 is OY; or R.sup.1 is OX and R.sup.2 is (CH.sub.2).sub.n --CH.sub.3 ; or R.sup.1 and R.sup.2 are (CH.sub.2).sub.n --CH.sub.3 ; or R.sup.1 is (CH.sub.2).sub.n --CH.sub.3 and R.sup.2 is (CH.sub.2).sub.p --CH.sub.3, whereinX,Y are identical or different and comprise a hydrogen atom or a monovalent cation;m is an integer from 1 to 4; andn,p are identical or different and are 0 or 1; with the proviso that when m is 1 or 2, R.sup.1 and R.sup.2 may not be OX and R.sup.1 and R.sup.2 may not be OX and OY, respectively. Also disclosed is a process for producing these cellulose ether products.

Abstract: The invention relates to dimethylphosphinylalkanephosphonic acids of the general formula I, in which n is 1 or 2, which are used as setting retarders for gypsum.

Abstract: Process for the manufacture of vinyl phosphonic acid derivatives of the formula ##STR1## with R.sub.1 being hydrogen or alkyl with 1 to 4, preferably 1 to 2, carbon atoms and n being 1 or 2, which comprises heating to 150.degree.-270.degree. C., preferably 170.degree. to 230.degree. C., 2-acetoxyethane phosphonic acid dialkyl esters of the formula ##STR2## with R.sub.2 being alkyl with 1 to 4, preferably 1 to 2, carbon atoms, in the presence of acidic or basic catalysts.

Abstract: Process for the preparation of vinylphosphonic acid, by heating a 2-acetoxyethanephosphonic acid dialkyl ester of the general formula ##STR1## wherein R denotes an alkyl group having 1-4 carbon atoms, in the presence of acid or basic catalysts at 150.degree. to 270.degree. C. with elimination of an alkyl acetate, and thereafter hydrolyzing the remaining reaction mixture with water at temperatures between 150.degree. and 230.degree. C. while simultaneously distilling off the alcohol formed.

Abstract: What is disclosed is a method of making a carboxylic acid amide, including a peptide, by reacting a compound having a free amino group with a compound having a free carboxy group in the presence of an anhydride of an alkane-phosphonic acid.