Selective Reduction of Halopolyfluorocarbons by Organosilicon Hydrides
作者:Viacheslav A. Petrov
DOI:10.1021/jo9807363
日期:1998.10.1
It is demonstrated that silicon hydrides can be used for reduction of polyfluorinated halocarbons. For example, the reaction between CF(3)CCl(2)F and excess triethylsilane, catalyzed by benzoyl peroxide, leads to the formation of a mixture containing CF(3)CHClF (major), CF(3)CH(2)F, and ClSi(C(2)H(5))(3). On the other hand, the reaction of chlorofluoroalkanes, containing an internal -CCl(2)- group
METHOD FOR PRODUCING 1-CHLORO-1,2-DIFLUOROETHYLENE
申请人:DAIKIN INDUSTRIES, LTD.
公开号:US20190169101A1
公开(公告)日:2019-06-06
The present invention provides a method for efficiently producing 1-chloro-1,2-difluoroethylene at low cost. Specifically, the present invention provides a method for producing 1-chloro-1,2-difluoroethylene, including the step of dehydrohalogenating chlorofluoroethane represented by formula (1) CFClX
1
—CHFX
2
wherein X
1
and X
2
are different from each other and represent H, F, or Cl; and either X
1
or X
2
is H.
have been fluorinated with elementalfluorine to give good yields of hydrohalofluoroalkanes. The best operational conditions for F2 addition to the double bond rather than hydrogen and/or chlorine atom substitution, dimerization and oligomerization of radical intermediates have been studied. Preliminary studies on the reaction of Freon 12 and Freon 22 towards elementalfluorine have also been carried out
[EN] PREPARATION OF HALO-OLEFIN<br/>[FR] PREPARATION D'UNE HALO-OLEFINE
申请人:HONEYWELL INT INC
公开号:WO2005108331A1
公开(公告)日:2005-11-17
A process for preparing a halo-olefin to minimize one or more side reactions which form at least one impurity, said process comprising contacting a halogenated hydrocarbon with a metal dehalogenating agent dissolved in a solvent under conditions sufficient to dehalogenate said halogenated hydrocarbon to produce a product stream comprising said halo-olefin and at least one impurity, said metal dehalogenating agent having an average particle size within a range of average particle sizes, said impurity concentration of said product stream being essentially constant within said range and increasing significantly below said range.
Reduction of polyhalofluoroalkanes with formate to hydrogen-bearing alternatives initiated by carbon dioxide anionic radical
作者:Chang-Ming Hu、Ming-Hu Tu
DOI:10.1016/s0022-1139(00)81259-2
日期:1991.11
Reduction of polyhalofluoroalkanes with formate in the presence of a catalytic amount of persulfate is described. Such a reagent possesses good selectivity in the reduction of carbon-chlorine bonds. A chain mechanism including carbon dioxide anionic radicals and polyhalofluoroalkyl radicals is proposed.