A process for converting tertiary halogenated hydrocarbons in a tertiary halogenated hydrocarbon-containing stream to a corresponding unhalogenated or less-halogenated unsaturated hydrocarbon product with the release of hydrogen halide involves contacting the tertiary halogenated hydrocarbon with a sorbent-type dehydrohalogenation catalyst in a reaction zone and optionally passing a stripping gas through the reaction zone to remove vapor phase reaction products from the reaction zone. A process for removing a tertiary chlorinated hydrocarbon impurity from 1,3-dichloro-1-propene involves contacting a mixture containing the 1,3-dichloro-1-propene and the tertiary chlorinated hydrocarbon impurity with a dehydrochlorination catalyst effective to catalyze a conversion of the tertiary chlorinated hydrocarbon impurity to a corresponding unchlorinated or less-chlorinated unsaturated hydrocarbon and hydrogen chloride and distilling the 1,3-dichloro-1-propene to produce a purified cis-1,3-dichloro-1-propene fraction and a purified trans-1,3-dichloro-1-propene fraction.

A process for converting tertiary halogenated hydrocarbons in a tertiary halogenated hydrocarbon-containing stream to a corresponding unhalogenated or less-halogenated unsaturated hydrocarbon product with the release of hydrogen halide involves contacting the tertiary halogenated hydrocarbon with a sorbent-type dehydrohalogenation catalyst in a reaction zone and optionally passing a stripping gas through the reaction zone to remove vapor phase reaction products from the reaction zone. A process for removing a tertiary chlorinated hydrocarbon impurity from 1,3-dichloro-1-propene involves contacting a mixture containing the 1,3-dichloro-1-propene and the tertiary chlorinated hydrocarbon impurity with a dehydrochlorination catalyst effective to catalyze a conversion of the tertiary chlorinated hydrocarbon impurity to a corresponding unchlorinated or less-chlorinated unsaturated hydrocarbon and hydrogen chloride and distilling the 1,3-dichloro-1-propene to produce a purified cis-1,3-dichloro-1-propene fraction and a purified trans-1,3-dichloro-1-propene fraction.

A liquid composition according to one embodiment of the present invention contains 0.0001 mol % to 40 mol % (Z)-1,2-dichloro-3,3,3-trifluoropropene (1223Z) and 99.9999 mol % to 60 mol % (E)-1,2-dichloro-ethylene (t-DCE). The liquid composition has less influence on the global environment and azeotropic (or azeotrope-like) properties. There occurs practically no composition change even when the liquid composition is used in an open system or used for a long term. Further, it is less likely that there will occur a composition change even when the liquid composition is recovered by distillation. The liquid composition is thus suitably usable as a cleaning agent (solvent). In particular, the liquid composition of 90 mol % or less of t-DCE is classified as non-hazardous under the Fire Serves Act.

An object of the present invention is to provide a novel azeoropic or azeotrope-like composition that is effective for the separation of HF from 1,1,2-trichloroethane (HCC-140), trans-1,2-dichloroethylene (HCO-1130(E)), or cis-1,2-dichloroethylene (HCO-1130(Z)). The object can be achieved by an azeotropic or azeotrope-like composition comprising HCC-140, HCO-1130(E), or HCO-1130(Z), and hydrogen fluoride.

An object of the present invention is to provide a novel azeoropic or azeotrope-like composition that is effective for the separation of HF from 1,1,2-trichloroethane (HCC-140), trans-1,2-dichloroethylene (HCO-1130(E)), or cis-1,2-dichloroethylene (HCO-1130(Z)). The object can be achieved by an azeotropic or azeotrope-like composition comprising HCC-140, HCO-1130(E), or HCO-1130(Z), and hydrogen fluoride.

It is an object to provide a new azeotropic or azeotropic-like composition comprising HCFC-142. The present disclosure provides, as its solution, an azeotropic or azeotropic-like composition comprising a refrigerant, wherein the refrigerant comprises 2-chloro-1,1-difluoroethane (HCFC-142) and at least one additional compound selected from the group consisting of trans-1,2-dichloroethylene (HCO-1130(E)) and the like.

To provide an azeotropic composition, an azeotrope-like composition and a composition, which have little influence over the global environment, which are non-flammable, and which are less likely to undergo composition change even when evaporated and condensed repeatedly, and a detergent, a solvent and a heat transfer fluid, which contain the azeotropic composition, the azeotrope-like composition or the composition.

An azeotropic composition consisting essentially of 34.5 mass % of (Z)-1-chloro-2,3,3-trifluoropropene and 65.5 mass % of trans-1,2-dichloroethylene, and an azeotrope-like composition consisting essentially of from 28 to 41 mass % of (Z)-1-chloro-2,3,3-trifluoropropene and from 59 to 72 mass % of trans-1,2-dichloroethylene.

The present disclosure provides compounds, compositions, and methods for preparing alkenyl halides and/or haloalkyl-substituted olefins with Z-selectivity. The methods are particularly useful for preparing alkenyl fluorides such as CF.sub.3-substituted olefins by means of cross-metathesis reactions using halogen-containing molybdenum and tungsten complexes.

The present disclosure provides compounds, compositions, and methods for preparing alkenyl halides and/or haloalkyl-substituted olefins with Z-selectivity. The methods are particularly useful for preparing alkenyl fluorides such as CF.sub.3-substituted olefins by means of cross-metathesis reactions using halogen-containing molybdenum and tungsten complexes.

The present invention provides a composition comprising an HFO compound, the composition having excellent stability with decomposition and oxidation of the HFO compound being inhibited, the composition having improved refrigerating capacity when used as a heat transfer medium, compared with the case in which an HFO compound is used alone. More specifically, the present invention provides a composition comprising at least one HFO compound selected from the group consisting of HFO-1234yf, (E-/Z-)HFO-1234ze, and (E-/Z-)HFO-1225ye; and a chlorine-containing compound, wherein (1) the chlorine-containing compound is at least one member selected from the group consisting of CH.sub.2CHCl, CHFCHCl, CH.sub.2CFCl, CF.sub.3Cl, CH.sub.3Cl, CF.sub.3CH.sub.2Cl, CClFCHCl, and CHFCCl.sub.2, and (2) the chlorine-containing compound is contained in an amount ranging from 1 to 500000 mass ppm.