Abstract: Destabilized elemental phosphorus, for example resulting from fire involvement due to exposure with air, can be treated by placing the destabilized elemental phosphorus in the presence of a weakly basic aqueous solution of an alkali metal hypochlorite as a blanketing agent. Sodium hypochlorite is preferred.

Abstract: There is disclosed a method for the conversion of a carboxylic acid group on the ring of an aromatic or N-heteroaromatic compound to a trichloromethyl group which comprises contacting the aromatic or N-heteroaromatic compound with a phenylphosphonous dichloride, phosphorus trichloride and chlorine.

Abstract: Alkyl- or arylphosphonothioic dihalides are prepared by contacting a dialkyl or diaryl thioether with various phosphorus containing reactants including: PCl.sub.3, PBr.sub.3, P(S)Cl.sub.3, P(S)Br.sub.3, P.sub.4 S.sub.3, P.sub.4 S.sub.5, P.sub.4 S.sub.7, P.sub.4 S.sub.1 O and elemental phosphorus under at least autogenous pressure at a temperature of from about 200.degree. C. to about 400.degree. C. The compounds obtained are useful as constituents in insecticides, fungicides, pharmaceuticals, and as intermediates in preparation of other organophosphorus compounds.

Abstract: Mono- and disubstituted mercaptophosphorothionochloridates are prepared by reacting a disubstituted sulfide having the formulaR.sub.2 Swherein each R is an independently selected alkyl, cycloalkyl or benzyl, with phosphorus pentasulfide and thiophosphorus trichloride at a temperature from about 150.degree. to about 300.degree. C. A molar ratio of R.sub.2 S to P.sub.4 S.sub.10 to P(S)Cl.sub.3 of 6:1:8 is preferred where the monosubstituted compound is desired, while a ratio of 6:1:2 is preferred where the disubstituted compound is desired. The compounds are useful as intermediates for compounds which exhibit biocidal properties, particularly insecticides and herbicides.

Abstract: Dialkyl or diaryl phosphonothioic halides are prepared by contacting an alkyl or aryl halide, respectively, with phosphorus sesquisulfide, P.sub.4 S.sub.3, under at least autogenous pressure at a temperature of from about 200.degree. to about 400.degree. C. The compounds obtained are useful as pesticides and as intermediates in preparation of pesticides and other organo-phosphorus compounds.

Abstract: Tertiary phosphine sulfides and oxides are prepared by contacting elemental phosphorus with dialkyl sulfides, diaryl sulfides or dialkyl ethers in the presence of a catalyst under at least autogenous pressure at a temperature of from about 200.degree. to about 400.degree. C. The compounds obtained are useful as constituents in catalysts, insecticides, fungicides and pharmaceuticals, and as intermediates in preparation of other organophosphorus compounds.

Abstract: Trialkyl tetrathiophosphates are prepared by contacting a dialkyl sulfide with phosphorus pentasulfide according to the following theoretical reaction scheme:6R.sup.1 SR.sup.2 + P.sub.4 S.sub.10 .fwdarw. 4(R.sup.1 S).sub.x (R.sup.2 S).sub.y P(S)wherein x + y = 3; R.sup.1 and R.sup.2 are the same or different and are selected from the group consisting of aliphatic, having from 1 to about 18 carbon atoms, and alicyclic having 5 or 6 carbon atoms in the ring and the C.sub.1 -C.sub.4 alkyl substituted derivatives thereof. The contacting is effected under at least autogenous pressure at a temperature of from about 150.degree. C. to 300.degree. C. The compounds obtained are useful as additives in agricultural chemicals and as intermediates in preparation of other organophosphorus compounds.

Abstract: Alkyl- and arylphosphonothioic dihalides are prepared by contacting a dialkyl or diaryl disulfide with phosphorus and phosphorus trihalide under at least autogenous pressure at a temperature of from about 200.degree. C. to about 400.degree. C. The compounds obtained are useful as constituents in insecticides, fungicides, pharmaceuticals and as intermediates in preparation of other organophosphorus compounds.

Abstract: Alkane bis-dihalophosphines are prepared by reacting an olefin with a trivalent phosphorus compound having three halogens attached thereto, such as phosphorus trichloride, in the presence of elemental phosphorus under at least autogenous pressure at a temperature of from 150.degree.C. to 350.degree.C. The compounds obtained are useful as intermediates in preparing organophosphorus compounds which can be used as insecticides, fungicides, pharmaceuticals, flame retardant compounds, and in forming metal complexes which are catalyst activators.

Abstract: Alkyl- or arylphosphonothioic dihalides are prepared by contacting an alkyl or aryl halide with a trivalent phosphorus compound having three halogens attached thereto or a pentavalent thiophosphorus halide having three halogens attached thereto or mixtures of the trivalent and pentavalent phosphorus halides, in the presence of phosphorus sulfides, for example, P.sub.4 S.sub.3, P.sub.4 S.sub.7 or P.sub.4 S.sub.10 under at least autogenous pressure at a temperature of from about 175.degree.C. to about 400.degree.C. The compounds obtained are useful as constituents in insecticides, fungicides, pharmaceuticals, and as intermediates in preparation of other organophosphorus compounds.

Abstract: Fire resistant polymer compositions containing, as fire-retardant, N,N-dialkyl, O,O'-bis(haloalkyl)phosphoramidates. Polymers include urethanes, rayon and cellulose acetate.

Abstract: Alkyl- or arylphosphonothioic dihalides are prepared by contacting a reactant selected from the group consisting of mono-alkyl or aryl mercapto phosphorothionodihalidate, dialkyl or aryl mercapto phosphorothionohalidate or tri- alkyl or aryl tetrathiophosphate with phosphorus trihalide under at least autogenous pressure at a temperature of from about 200.degree.C. to about 400.degree.C. The compounds obtained are useful as constituents in insecticides, fungicides and pharmaceuticals, and as intermediates in preparation of other organophosphorus compounds.

Abstract: Flame retardant compounds, O,O-diaryl N,N-dialkyl phosphoramidates are prepared by reacting a phosphoramidohalidate or a phosphoramidic dihalide with a phenol in the presence of an alkali or alkaline earth metal hydroxide and a water-insoluble, water-immiscible, non-hydroxylic polar ketone which is a solvent for both the reactants and the product. High yields are obtained.

Abstract: Alkyl or aryl phosphonic or phosphonothioic dihalides and phosphinic or phosphinothioic monohalides are prepared by reacting an alkyl halide or aryl halide respectively with a tri-valent phosphorus compound having at least two halogens attached thereto, and preferably three two halogens such as phosphorus trihalide, in the presence of P.sub.4 O.sub.10 or P.sub.4 S.sub.10 under at least autogenous pressure at a temperature of from 200.degree. C. to 450.degree. C. The compounds obtained are useful as constituents in insecticides, fungicides, pharmaceuticals, and as intermediates in preparation of other organophosphorus compounds.

Abstract: Alkyl- or arylphosphonothioic dihalides are prepared by contacting an alkyl or aryl halide with a trivalent phosphorus compound having three halogens attached thereto or a pentavalent thiophosphorus halide having three halogens attached thereto or mixtures of the trivalent and pentavalent phosphorus halides, in the presence of phosphorus sulfides, for example, P.sub.4 S.sub.3, P.sub.4 S.sub.7 or P.sub.4 S.sub.10 under at least autogenous pressure at a temperature of from about 175.degree. C. to about 400.degree. C. The compounds obtained are useful as constituents in insecticides, fungicides, pharmaceuticals, and as intermediates in preparation of other organophosphorus compounds.