79-38-9Relevant articles and documents
Gas phase process for chlorotrifluoroethylene
-
Page/Page column 12; 17, (2020/07/15)
Disclosed are processes for the dechlorination of haloethanes comprising reacting in the gaseous phase a haloethane and reducing agent such as an alkene, an alkane, hydrogen or combinations of two or more of these, in the presence of a silicon-based catalyst.
GAS PHASE PROCESS FOR CHLOROTRIFLUOROETHYLENE
-
Paragraph 0117-0120, (2019/08/20)
The present invention relates to a process for the preparation of haloethylenes, and preferably perhaloethylenes, by the gas-phase dechlorination of haloethanes in the presence of a catalyst and optionally in the presence of an alkene or an alkane. In particular aspects, the invention relates to a gas-phase process for preparing chlorotrifluoroethylene (CTFE). More particularly, the present invention relates to a gas-phase process for preparing CTFE from 1,1,2-trichloro-1,2,2-trifluoroethane (CFC-113) by dechlorination in the presence of an alkene or an alkane and a catalyst.
PROCESS FOR PRODUCING CHLOROTRIFLUOROETHYLENE
-
Page/Page column 11; 12, (2016/03/19)
The present invention relates, at least in part, to a process for making chlorotrifluoroethylene (CFO-1113) from 1,2-dichloro-1,1,2-trifluoroethane (HCFC-123a). In certain aspects, the process includes dehydrochlorinating 1,2-dichloro-1,1,2-trifluoroethane (HCFC-123a) in the presence of a catalyst selected from the group consisting of (i) one or more metal halides; (ii) one or more halogenated metal oxides; (iii) one or more zero-valent metals or metal alloys; (iv) combinations thereof.
At the same time, preparation of trifluoro-vinyl chloride and tetrafluoroethylene, and method
-
Paragraph 0054; 0055, (2017/03/22)
The invention discloses a method for simultaneously preparing trifluorochloroethylene and tetrafluoroethylene. The method comprises the following steps: mixing monochlorodifluoromethane, dichlorofluoromethane and a diluent, performing copyrolysis reaction to generate pyrolysis gas, quickly cooling, washing by water and alkali in sequence, drying, compressing, rectifying and purifying to obtain trifluorochloroethylene and tetrafluoroethylene, wherein the molar ratio of monochlorodifluoromethane to dichlorofluoromethane is 1 to (1-4), the molar ratio of the diluent to the total amount of monochlorodifluoromethane and dichlorofluoromethane is 1 to (1-20), the reaction temperature is 500-1,200 DEG C, the reaction pressure is 0.1-1MPa, and the reaction retention time is 0.01-10 seconds. The method has the advantages of being simple in process, easy for industrialization and environment-friendly, and raw materials are easily available.
Novel green chlorotrifluoroethylene preparation method
-
Paragraph 0022; 0023, (2017/03/17)
A process for preparing trifluorochloroethylene including: in a multi-tubular reactor, hydrogenation reacting 1,1,2-trifluoro-1,2,2-trichloroethane directly with a catalyst potassium zinc trihydride to obtain trifluorochloroethylene, wherein the catalytic reaction is performed at a temperature of 250-350° C. and a pressure of 0.7-1.0 MPa for 10-20 seconds. The conventional process in which zinc powder is used for dechlorination or hydrogen is used for dechlorination through hydrogenation with the action of a noble metal catalyst is avoided in the process disclosed herein. The present process substantially reduces the production cost of trifluorochloroethylene, and substantially increases the product yield, which can be up to 99% or more.
Redox-active porous coordination polymers prepared by trinuclear heterometallic pivalate linking with the redox-active nickel(II) complex: Synthesis, structure, magnetic and redox properties, and electrocatalytic activity in organic compound dehalogenation in heterogeneous medium
Lytvynenko,Kolotilov,Kiskin,Cador,Golhen,Aleksandrov,Mishura,Titov,Ouahab,Eremenko,Novotortsev
supporting information, p. 4970 - 4979 (2014/06/09)
Linking of the trinuclear pivalate fragment Fe2CoO(Piv) 6 by the redox-active bridge Ni(L)2 (compound 1; LH is Schiff base from hydrazide of 4-pyridinecarboxylic acid and 2- pyridinecarbaldehyde, Piv- = pivalate) led to formation of a new porous coordination polymer (PCP) {Fe2CoO(Piv)6}{Ni(L) 2}1.5 (2). X-ray structures of 1 and 2 were determined. A crystal lattice of compound 2 is built from stacked 2D layers; the Ni(L) 2 units can be considered as bridges, which bind two Fe 2CoO(Piv)6 units. In desolvated form, 2 possesses a porous crystal lattice (SBET = 50 m2 g-1, V DR = 0.017 cm3 g-1 estimated from N2 sorption at 78 K). At 298 K, 2 absorbed a significant quantity of methanol (up to 0.3 cm3 g-1) and chloroform. Temperature dependence of molar magnetic susceptibility of 2 could be fitted as superposition of X MT of Fe2CoO(Piv)6 and Ni(L)2 units, possible interactions between them were taken into account using molecular field model. In turn, magnetic properties of the Fe2CoO(Piv) 6 unit were fitted using two models, one of which directly took into account a spin-orbit coupling of CoII, and in the second model the spin-orbit coupling of CoII was approximated as zero-field splitting. Electrochemical and electrocatalytic properties of 2 were studied by cyclic voltammetry in suspension and compared with electrochemical and electrocatalytic properties of a soluble analogue 1. A catalytic effect was determined by analysis of the catalytic current dependency on concentrations of the substrate. Compound 1 possessed electrocatalytic activity in organic halide dehalogenation, and such activity was preserved for the Ni(L)2 units, incorporated into the framework of 2. In addition, a new property occurred in the case of 2: the catalytic activity of PCP depended on its sorption capacity with respect to the substrate. In contrast to homogeneous catalysts, usage of solid PCPs may allow selectivity due to porous structure and simplify separation of product.
SYSTEMS AND PROCESSES FOR CFO-1113 FORMATION FROM HCFC-123a
-
Page/Page column 4, (2010/12/31)
Systems and processes relating to the formation and production of CFO-1113 HCFC-123a. Such systems and processes can include one or more reactors in series that react HCFC-123a and base to produce reaction product vapors including CFO-1113. Optionally, a phase transfer agent or catalyst can be added to the reaction to enhance the reaction rate. The CFO-1113 can be separated from the reaction product vapors to produce a CFO-1113 product stream. The reactions can be conducted continuously, and a liquid effluent stream can be removed from the reactors during the reaction. Unreacted HCFC-123a can be separated from the liquid effluent stream and provided back to the reactors.
Catalytic synthesis of polyfluoroolefins
Stepanov,Delyagina,Cherstkov
scheme or table, p. 1290 - 1295 (2011/01/04)
A catalytic synthesis of polyfluoroolefins was developed proceeding from polyfluorochlorocarbons with the use of industrially produced nickel-chromium catalyst. Three ways of the catalytic synthesis of fluoroolefins were implemented: the cleavage of vicinal chlorine atoms from polyfluorochlorocarbons, the replacement of vinyl chlorine atoms by hydrogen in fluorochloroolrfins, and the reductive dimerization of polyfluorochlorocarbons containing a trichloromethyl group. The condition of a prolonged operation of the nickel-chromium catalyst was found consisting in the application of quartz for absorption of the hydrogen fluoride formed as a side product.
GASEOUS DIELECTRICS WITH LOW GLOBAL WARMING POTENTIALS
-
, (2010/12/31)
A dielectric gaseous compound which exhibits the following properties: a boiling point in the range between about ?20° C. to about ?273° C.; non-ozone depleting; a GWP less than about 22,200; chemical stability, as measured by a negative standard enthalpy of formation (dHf0); a toxicity level such that when the dielectric gas leaks, the effective diluted concentration does not exceed its PEL; and a dielectric strength greater than air.
PROCESS FOR MAKING CHLOROTRIFLUOROETHYLENE FROM 1,1,2-TRICHLOROTRIFLUOROETHANE
-
Page/Page column 2, (2010/03/02)
A process for the making chlorotrifluoroethylene. The process has the step of reacting 1,1,2-trichlorotrifluoroethane with a reducing metal in the presence of a polar aprotic solvent under conditions sufficient to form chlorotrifluoroethylene.
