Abstract: The solid composite stabilizer for PCE includes the following components in parts by weight: 10 to 30 parts of a phenol-substituted ion-exchange resin, 50 to 80 parts of a basic anion-exchange resin, and 50 to 100 parts of a desiccating agent. The phenol-substituted ion-exchange resin is chloromethylated macroporous polystyrene-divinylbenzene (PS-DVB) substituted by a phenolic compound; and the basic anion-exchange resin is chloromethylated macroporous PS-DVB substituted by an amine compound. The preparation method includes the following step: thoroughly mixing the phenol-substituted ion-exchange resin, the basic anion-exchange resin, and the desiccating agent in a specified ratio to obtain the solid composite stabilizer for PCE. The solid composite stabilizer for PCE is packaged in a glass fiber bag and placed in PCE for storage and use.

Abstract: The present invention relates in part to a method of stabilizing chloropropenes, such as 1,1,2,3-tetrachloropropene, otherwise known to decompose and degrade, and to the resulting stabilized chloropropene, using a morpholine compound and/or a trialkyl phosphate compound as defined herein. Such stabilized chloropropenes are useful in the manufacture of hydrofluoroolefins such as 2,3,3,3-tetrafluoroprop-1-ene (1234yf).

Abstract: Polychloroethylene, e.g., trichioroethylene and perchloroethylene, is stabilized with a stabilizing amount of a stable free radical stabilizer, e.g., a material having the 2,2,6,6-tetra(lower alkyl)-1-piperidinyloxy-yl free radical group, such as 2,2,6,6-tetramethyl-4-hydroxy-1-piperidinyloxy, or the 2,2,5,5-tetra(lower alkyl)pyrrolidinyloxy group, such as 2,2,5,5-tetramethyl pyrrolidinyloxy. Stable free radical stabilizer is removed from a polychloroethylene composition containing same by contacting the composition with silica, e.g., precipitated silica.

Abstract: A process is provided for the stabilization of polychlorinated alkanes against dehydrochlorination. The process comprises adding a phenol compound to a polychlorinated alkane such that the dehydrochlorination of the polychlorinated alkane is suppressed when heated in the presence of iron(III). In a preferred embodiment, the process comprises the prevention or reduction of dehydrochlorination of 1,1,1,3,3-pentachloropropane when heated in the presence of iron(III) contamination by the addition of monomethyl ether hydroquinone. In another embodiment, the long term storage stability of polychlorinated alkanes against dehydrochlorination is improved due to the addition of a phenol compound.

Abstract: Compositions that comprise, for one mole of o-iodoxybenzoic acid, from 0.5 to 4 moles of an aliphatic acid of formula CH3(CH2)nCOOH, in which n is from 8 to 20, of a benzenecarboxylic acid of formula  in which R represents H, CH3, COOH or of mixtures thereof.

Abstract: Vinylidene chloride is stabilized with free radical stabilizer having at least one 2,2,6,6-tetra(lower alkyl)-1-piperidinyloxy-yl free radical group.

Abstract: A flame retardant product predominant in hexabromocyclododecane is prepared and dried by a process wherein gaseous ammonia is injected into the dryer system to prevent the formation of color bodies which contaminant the product.

Abstract: The present invention relates to a process for the treatment of heavy residues produced in the manufacture of chlorinated products, in which process a chemical compound chosen from certain fatty compounds is added to the heavy residues in order to form fluid and stable liquid suspensions.

Abstract: Off-color liquid ortho-chloro-para-xylene compositions are decolorized by contacting the compositions with particles of diatomaceous silica, magnesium oxide or soda ash.

Abstract: A process and composition for stabilizing ar-brominated styrene polymer against polymerization which mixes an ar-brominated styrene monomer with a stabilizing amount of N,N-dialkylhydroxylamine to produce a stabilized monomer and novel stabilized compositions.

Abstract: A process for manufacturing 1,2-dibromo-3-chloropropane is disclosed. The process comprises the steps of reacting bromine and allyl chloride at a temperature of from 5.degree. to 85.degree. C. and maintaining the reaction mixture between 60.degree. to 90.degree. C. for a sufficient length of time so as to permit the reaction between the bromine and allyl chloride to go to completion. In addition, the process also includes the step of adding an agent so as to stabilize and purify the product so formed.

Abstract: Alkyl polysulfides are prepared by reacting alkyl halides with hydrogen sulfide and sulfur in the presence of ammonia or certain monoamines.