A method of synthesizing 2,3,3,3-tetrafluoropropene (1234yf) from 2-chloro-3,3,3-trifluoropropene (1233xf). The 2-chloro-3,3,3-trifluoropropene (1233xf) is reacted in the vapor phase, in the presence of a catalyst, at a temperature and pressure sufficient to selectively convert the 2-chloro-3,3,3-trifluoropropene (1233xf) to 2,3,3,3-tetrafluoropropene (1234yf) without the use of antimony-based catalysts.

A method of synthesizing 2,3,3,3-tetrafluoropropene (1234yf) from 2-chloro-3,3,3-trifluoropropene (1233xf). The 2-chloro-3,3,3-trifluoropropene (1233xf) is reacted in the vapor phase, in the presence of a catalyst, at a temperature and pressure sufficient to selectively convert the 2-chloro-3,3,3-trifluoropropene (1233xf) to 2,3,3,3-tetrafluoropropene (1234yf) without the use of antimony-based catalysts.

The invention relates to a composition comprising at least 99% by weight of 1,1,1,2,3-pentachloropropane, and comprising at least one compound chosen from a list of additional compounds consisting of trichloropropanes, tetrachloropropanes, pentachloropropanes other than 1,1,1,2,3-pentachloropropane, hexachloropropanes, heptachloropropanes, dichloropropenes, trichloropropenes, tetrachloropropenes, pentachloropropenes and hexachloropropene, said compound being present in the composition in a weight content of less than or equal to 500 ppm.

The invention also relates to the use of this composition for manufacturing 2,3,3,3-tetrafluoropropene.

The invention relates to a composition comprising at least 99% by weight of 1,1,1,2,3-pentachloropropane, and comprising at least one compound chosen from a list of additional compounds consisting of trichloropropanes, tetrachloropropanes, pentachloropropanes other than 1,1,1,2,3-pentachloropropane, hexachloropropanes, heptachloropropanes, dichloropropenes, trichloropropenes, tetrachloropropenes, pentachloropropenes and hexachloropropene, said compound being present in the composition in a weight content of less than or equal to 500 ppm.

The invention also relates to the use of this composition for manufacturing 2,3,3,3-tetrafluoropropene.

The invention first relates to a composition comprising at least 99 wt. % of 1,1,1,3,3-pentachloropropane and at least one compound selected from a list of additional compounds consisting of dichloropropanes, trichloropropanes, tetrachloropropanes, pentachloropropanes different from 1,1,1,3,3-pentachloropropane, hexachloropropanes, heptachloropropanes, chloropropenes, dichloropropenes, trichloropropenes, tetrachloropropenes, pentachloropropenes and hexachloropropene, the weight content of said compound in the composition being lower than or equal to 500 ppm.

The invention first relates to a composition comprising at least 99 wt. % of 1,1,1,3,3-pentachloropropane and at least one compound selected from a list of additional compounds consisting of dichloropropanes, trichloropropanes, tetrachloropropanes, pentachloropropanes different from 1,1,1,3,3-pentachloropropane, hexachloropropanes, heptachloropropanes, chloropropenes, dichloropropenes, trichloropropenes, tetrachloropropenes, pentachloropropenes and hexachloropropene, the weight content of said compound in the composition being lower than or equal to 500 ppm.

This invention provides a method for stably producing 2,3,3,3-tetrafluoropropene for a long period of time wherein unreacted materials are reused after distillation without liquid-liquid separation to suppress catalyst deactivation. The method for producing 2,3,3,3-tetrafluoropropene comprises the step of reacting 1233xf or like chloropropene with hydrogen fluoride in the presence of a catalyst, the step of subjecting the reaction mixture obtained in the above step to distillation to separate the mixture into a first stream comprising 2,3,3,3-tetrafluoropropene as a main component and a second stream comprising unreacted hydrogen fluoride and organic matter containing unreacted chloropropene as main components, and the step of recycling the second stream to the above reaction, the distillation being performed under conditions in which the unreacted hydrogen fluoride and the organic matter containing the unreacted chloropropene do not undergo liquid-liquid separation at a portion of a distillation column from which the second stream is withdrawn.

This invention provides a method for stably producing 2,3,3,3-tetrafluoropropene for a long period of time wherein unreacted materials are reused after distillation without liquid-liquid separation to suppress catalyst deactivation. The method for producing 2,3,3,3-tetrafluoropropene comprises the step of reacting 1233xf or like chloropropene with hydrogen fluoride in the presence of a catalyst, the step of subjecting the reaction mixture obtained in the above step to distillation to separate the mixture into a first stream comprising 2,3,3,3-tetrafluoropropene as a main component and a second stream comprising unreacted hydrogen fluoride and organic matter containing unreacted chloropropene as main components, and the step of recycling the second stream to the above reaction, the distillation being performed under conditions in which the unreacted hydrogen fluoride and the organic matter containing the unreacted chloropropene do not undergo liquid-liquid separation at a portion of a distillation column from which the second stream is withdrawn.

The present invention provides a method for producing a fluorine-containing haloolefin compound, said method being able to reduce the generation of overly fluorinated compounds as by-products in the production of the fluorine-containing haloolefin compound and produce the target product of high purity at a high yield. The invention also provides a halogenated hydrocarbon composition. The method for producing a haloolefin compound through the step of fluorinating a starting material containing at least one of a pentachloropropane or a tetrachloropropene in the presence of a fluorinating agent in a reactor, according to the present invention, includes the step of adding hydrogen chloride to the reactor. The composition according to the present invention contains: at least one member selected from the group consisting of a pentachloropropane and a tetrachloropropene; and hydrogen chloride.

The present invention provides a method for producing a fluorine-containing haloolefin compound, said method being able to reduce the generation of overly fluorinated compounds as by-products in the production of the fluorine-containing haloolefin compound and produce the target product of high purity at a high yield. The invention also provides a halogenated hydrocarbon composition. The method for producing a haloolefin compound through the step of fluorinating a starting material containing at least one of a pentachloropropane or a tetrachloropropene in the presence of a fluorinating agent in a reactor, according to the present invention, includes the step of adding hydrogen chloride to the reactor. The composition according to the present invention contains: at least one member selected from the group consisting of a pentachloropropane and a tetrachloropropene; and hydrogen chloride.