Abstract: The present inventions provide manufacturing methods of 1,1,1,2,3-pentafluoropropene characterized by the reaction of removing HF by means of the contact of 1,1,1,2,3,3-hexafluoropropane in the gas state with active carbon or active carbon added with metallic salt. 1,1,1,2,3-pentafluoropropene can be produced from easily available 1,1,1,2,3,3-hexafluoropropane by cost-effective industrial methods at high yields according to these inventions.The inventions also provide manufacturing methods of 1,1,1,2,3-pentafluoropropane characterized by reducing 1,1,1,2,3-pentafluoropropene with hydrogen under the presence of a hydrogenation catalyst consisting of palladium added with one or more of silver, copper, gold, tellurium, zinc, chromium, molybdenum, and thallium or under the presence of a rhodium catalyst. The desired product can be produced at high reactivities and high selectivities according to these inventions.

Abstract: A 1,1,2-trifluoro-2-(trans-4-substituted cyclohexyl)ethylene of the formula (1):R--(A).sub.m --Cy--CF=CF.sub.2 (1)wherein R is a C.sub.1-10 alkyl group, a halogen atom or a cyano group, provided that in the case of the alkyl group, an oxygen atom may be interposed in a carbon-carbon bond of the alkyl group or in a carbon-carbon bond between this alkyl group and A, some of carbon-carbon bonds in the alkyl group may be triple bonds or double bonds, one --CH.sub.2 -- group in the alkyl group may be substituted by a carbonyl group, and some or all of hydrogen atoms in the alkyl group may be substituted by fluorine atoms;Cy is an unsubstituted trans-1,4-cyclohexylene group;A is a trans-1,4-cyclohexylene group, a 1,4-phenylene group or a 1,4-cyclohexenylene group, wherein each of such cyclic groups is unsubstituted or substituted by one or more halogen atoms or cyano groups, one or more =CH-- groups constituting rings of such cyclic groups may be substituted by nitrogen atoms, and one or more --CH.sub.

Abstract: The invention relates to a cost effective and convenient process for the manufacture of fluorinated olefins of the formula RCF.sub.2 CH=CH.sub.2 where R is C.sub.x Cl.sub.y F.sub.z and y+z=2.times.+1. The invention is also directed to a lo practical process for converting these olefins to hydrofluorocarbons via the catalyzed fluorination with hydrogen fluoride. Hydrofluorocarbons produced via this process have application as solvents among other uses.

Abstract: The invention relates to a cost effective and convenient process for the manufacture of fluorinated olefins of the formula RCF.sub.2 CH=CH.sub.2 where R is C.sub.x Cl.sub.y F.sub.z and y+z=2x+1. The invention is also directed to a practical process for converting these olefins to hydrofluorocarbons via the catalyzed fluorination with hydrogen fluoride. Hydrofluorocarbons produced via this process have application as solvents among other uses.

Abstract: A purification method of a fluorine-containing alkylethylene comprises reacting the fluorine-containing alkylethylene with powdered metallic zinc in the presence of an aqueous acetic acid solution. By this method, fluorine-containing alkyl iodide and fluorine-containing alkylethyl iodide, contained as impurities in the fluorine-containing alkylethylene, can be removed effectively, for example, to a level of 1 ppm or below.

Abstract: The subject is the preparation of chlorotrifluoroethylene (CTFE) by a known reaction of 1,1,2-trichloro-1,2,2,-trifluoroethane (R-113) with zinc powder dispersed in an alcohol such as methanol, and the object of the invention is industrially easily and smoothly carrying out the reaction in a continuous manner. The disclosed process uses a plurality of stirred tank reactors, usually two or three reactors, which are connected to each other in a series arrangement by overflow pipes. A dispersion of zinc powder in an alcohol is continuously fed into the first reactor only so as to allow the dispersion to overflow into the next reactor and then into the remaining reactor(s) in turn, and R-113 is continuously fed into each reactor. CTFE is continuously discharged from each reactor, while zinc in the initially fed dispersion is gradually converted into zinc chloride. In the last reactor the conversion of zinc reaches 90% or above.

Abstract: Perfluorobutadiene and higher alkandienes, with terminal double bonds, are obtained from .alpha.,.omega.-dibromo, .alpha., .omega.,bromo, iodo perfluoroalkanes by dehalofluorination carried out with the aid of an organometallic compounds, in the presence of aprotic solvent belonging to the class of hydrocarbons or polar aprotic solvent belonging to the class of ethers, with limited reaction times.

Abstract: Novel 1,1,2-trifluorodienes, which have a minimum of seven carbon atoms and may contain in their molecule a phenylene or a methylphenylene moiety, are useful monomers, that can be polymerized in the presence of either free radical or coordination catalysts and can undergo selective reactions such, as for example, epoxidation of the vinyl (nonfluorinated) double bond. The resulting perfluorovinyl epoxy compounds also are useful monomers, which can undergo polymerization to useful materials.

Abstract: A gaseous feed stream comprising hydrogen fluoride and 1,1-difluoroethane is contacted with liquid organic barrier material in a condensing zone to partially condense the feed stream. The gaseous phase remaining after the partial condensation comprises most of the 1,1-difluoroethane originally present in the feed stream while the liquid condensate comprises most of the hydrogen fluoride originally present in the feed stream. The gaseous phase and the liquid condensate are removed from the condensing zone as separate streams. Less than about 50 percent of the 1,1-difluoroethane originally present in the feed stream reacts with hydrogen fluoride to form 1,1,1-trifluoroethane during the partial condensation and the removal of the separate streams from the condensing zone. The preferred liquid organic barrier material is 1,1,-trifluoroethane.

Abstract: Perfluorobutadiene and higher perfluoroalkadienes, with terminal double bonds, are obtained from .alpha.,.omega.-diiodoperfluoroalkanes by deiodofluorination realized by using an organometallic compound, in the presence either of an aprotic solvent belonging to the class of hydrocarbons, or of an aprotic polar solvent, with short reaction times.