Abstract: The present invention relates to brominated polyether polyols, processes for the production as well as intermediates useful in the production of the same and to processes for the preparation of flame-retardant blends, premixes as well as polyurethane foams.

Abstract: The present invention relates to brominated polyether polyols, processes for the production as well as intermediates useful in the production of the same and to processes for the preparation of flame-retardant blends, premixes as well as polyurethane foams.

Abstract: Described are processes for producing 2-chloropyridine by reacting pyridine with molecular chlorine in the vapor phase in the presence of a catalyst which includes an organic compound which generates free radicals under the conditions of the reaction.

Abstract: Process for the purification of crude 1,1-dichloro -1-fluoroethane by treatment with chlorine in the presence of an organic free radical initiator and then distillation.

Abstract: 1-Chloro-1,1-difluoroethane is prepared by reacting hydrogen fluoride with vinylidene chloride, in a liquid medium containing preferably at least 40 mol % 1,1-dichloro-1-fluoroethane.

Abstract: Quaternary ammonium compounds having the general formula: ##STR1## in which, R.sub.1 is an alkyl or aryl group, unsubstituted or substituted by at least two ester groups;R.sub.2, R.sub.3 and R.sub.4 are alkyl, aryl, aryl alkyl or alkyl aryl groups substituted by ester groups comprising no more than 10 carbon atoms;m, r and n are whole numbers;A.sup. .circle.r- is an anion such that m.times.r=n. The compounds are obtained by treatment of a tert.alcohol-amine with an alkylating or arylating agent and an acylating agent. They may be used as activators of persalts in wash compositions.

Abstract: A process for the manufacture of olefine oxides, comprising reacting, with an olefine, an organic solution of percarboxylic acid which is obtained by reacting the corresponding carboxylic acid with hydrogen peroxide. The organic solvent employed is a mixture of inert organic solvents which does not form an azeotrope with the olefine to be epoxidized or with the olefine oxide, and which contains a volatile solvent, the boiling point of which is lower than that of the olefine oxide, and a solvent of low volatility, the boiling point of which is higher than that of the olefine oxide.

Abstract: A continuous process for the manufacture of carboxylic peracids by reacting the corresponding carboxylic acid with hydrogen peroxide in the presence of a catalyst and in the presence of an inert organic liquid which is a solvent for the peracid and is capable of forming a heterogeneous azeotrope with water, removing the water present in the reaction mixture by distillation of the water/organic liquid azeotrope, and keeping sufficient water in the reaction mixture to allow the formation of an aqueous phase which is separate from an organic phase containing the organic liquid.

Abstract: A continuous process for the manufacture of carboxylic peracids by reacting the corresponding carboxylic acid with hydrogen peroxide in the presence of a catalyst and in the presence of an inert organic liquid which is a solvent for the peracid and is capable of forming a heterogeneous azeotrope with water, removing the water present in the reaction mixture by distillation of the water/organic liquid azeotrope, and keeping sufficient water in the reaction mixture to allow the formation of an aqueous phase which is separate from an organic phase containing the organic liquid.

Abstract: New halogenated polyether polyols for the production of permanently fire-proof polyurethane foams, said halogenated polyether polyols corresponding to the general formula: ##STR1## in which z represents a number between 2 and 6, x and y represent numbers between 0 and 12 such that the mean value x+y per chain is between 0 and 12, and that z (x+y), in which x+y represents the mean value of x+y in the entire molecule, is between 1 and 72, and Z represents the residue of a halogenated polyhydroxyl compound initiator and comprises a C.sub.2 to C.sub.6 halogenated aliphatic radical of valence z, the halogen being selected from the group consisting of chlorine and bromine.

Abstract: Rigid and semi-rigid, fire-resisting polyurethane foams which are prepared by reacting in the presence of a foaming agent and a reaction catalyst an organic polyisocyanate and at least one polyether-polyol having the general formula: ##STR1## IN WHICH Z REPRESENTS A NUMBER BETWEEN 2 AND 6, X AND Y REPRESENT NUMBERS BETWEEN 0 AND 12 SUCH THAT THE MEAN VALUE X+Y PER CHAIN IS BETWEEN 0 AND 12, AND THAT Z (X+Y), IN WHICH X+Y REPRESENTS THE MEAN VALUE OF X+Y IN THE ENTIRE MOLECULE, IS BETWEEN 1 AND 72, AND Z represents a radical of valence z which is the residue of an organic polyhydroxyl compound initiator having from 2 and 6 hydroxyl groups.

Abstract: Halogenated polyether-polyols lacking terminal primary chlorohydrin and hydroxyl groups are reacted with organic isocyanates to produce semi-rigid or rigid polyurethane foam having excellent physical, mechanical and processing characteristics and good fire-resistance. The polyether-polyols are used individually, as admixtures with each other and/or as admixtures with non-halogenated polyether-polyols.

Abstract: Halogenated polyether-polyols lacking terminal primary chlorohydrin and hydroxyl groups are reacted with organic isocyanates to produce semi-rigid or rigid polyurethane foam having excellent physical, mechanical and processing characteristics and good fire-resistance. The polyether-polyols are used individually, as admixtures with each other and/or as admixtures with non-halogenated polyether-polyols.

Abstract: A process is provided for purifying vinylidene chloride by removing dichloroacetylene. The vinylidene chloride to be purified is treated with a solution containing at least one compound selected from the group consisting of metal sulfites and metal hyposulfites to form a reaction mixture, and thereafter the purified vinylidene chloride is separated from the reaction mixture.