The invention discloses a trifluoromethane resource utilization technology. The trifluoromethane resource utilization technology is characterized in that trifluoromethane and chlorine are transformed to chlorotrifluoromethane under effect of a catalyst, the generated chlorotrifluoromethane and ethylene or halogenated ethene are subjected to a catalytic reaction to prepare halogenated trifluoropropane; and the halogenated trifluoropropane is taken as a raw material of perfluoropropane or tetrafluoropropene. The trifluoromethane resource utilization technology has the advantages of mild reaction condition and simple process, the obtained product can be taken as the raw material for preparing a green refrigerant foaming agent perfluoropropane or tetrafluoropropene, and has important economic value.

Trifluoromethane resource utilization technology

The invention discloses a method for identifying a thermal decomposition product of a perfluorinated compound. The method comprises determining a decomposition or evaporation temperature of a target perfluorinated compound by a thermogravimetric-differential thermal analyzer, putting the perfluorinated compound into a quartz tube, placing the quartz tube with the perfluorinated compound to the center of a furnace, carrying out heating, after the reaction, stopping furnace work and gas feeding, carrying out collection, concentration and detection on the perfluorinated compound thermal decomposition product, and carrying out analysis through a Q-TOF and thermogravimetric infrared mass spectrometer. The identifying method is simple and easy and can be used for identifying the perfluorinated compound products in refuse burning. The method provides the basis for fate of the perfluorinated compound products in refuse burning, guarantees ecological security, has important environmental, social and economic significances and can be widely used.

Method for identifying thermal decomposition product of perfluorinated compound

The invention relates to a method for preparing tetrafluoroethylene and producing hexafluoropropylene by catalytic cracking of trifluoromethane. The method comprises the steps of: under the catalysisof a supported catalyst, catalytic cracking of trifluoromethane is carried out to obtain a reactant; the reactant is washed with cooling alkali to remove acid, dried, rectified and extracted, and separated into tetrafluoroethylene, hexafluoropropylene and incompletely reacted trifluoromethane; the obtained trifluoromethane is introduced into a reaction system to carry out a cracking reaction; thesupported catalyst comprises a carrier and an active component, and the carrier is AlF3 or Al2O3, the active component is one or a combination of two or more of CsF, LaF3, SmF3, PdF2 or PtF4, and themass of the active component is 0.2 to 12% of that of the supported catalyst. The method of the invention is simple and the reaction conditions are mild; the catalyst used overcomes the problem of easy carbon deposition, and the high conversion of trifluoromethane and the high selectivity of tetrafluoroethylene and hexafluoropropylene can be achieved at lower temperature.

Method for preparing tetrafluoroethylene and producing hexafluoropropylene by catalytic cracking of trifluoromethane

L'invention concerne un procede de preparation du 1-chloro-3,3,3-trifluoropropene comprenant : - la fourniture d'un compose de formule (I) : CF3-CH2-CHCIBr (I) ; - la deshydrobromation du compose de formule (I) pour former le 1-chloro -3,3,3-trifluoropropene. L'invention concerne egalement une composition comprenant du 1-chloro -3,3,3-trifluoropropene et le compose de formule (I), ainsi qu'un procede de preparation du compose de formule (I).

Procede de preparation du 1-chloro-3,3,3-trifluoropropene

The invention relates to a process for the preparation of 1-chloro-3,3,3-trifluoropropene, comprising: - the provision of a compound of formula (I): CF3-CH2-CHClBr (I); - the dehydrobromination of the compound of formula (I) to form 1-chloro-3,3,3-trifluoropropene. The invention also relates to a composition comprising 1-chloro-3,3,3-trifluoropropene and to the compound of formula (I) as well as to a process for the preparation of the compound of formula (I).

Process for the preparation of 1-chloro-3,3,3-trifluoropropene

The invention relates to a resource utilization method of trifluoromethane. The method comprises the steps of diluting trifluoromethane through nitrogen, preheating the trifluoromethane at 350-450 DEG C, standing in a reaction device of 650-950 DEG C for 0.05-10s, and carrying out thermal cracking reaction to obtain a tetrafluoroethylene and hexafluoropropylene mixture; and carrying out after-treatment, such as condensation and deacidification, drying, methanol absorption, extraction, distillation and separation to obtain high-purity and high-added value tetrafluoroethylene and hexafluoropropylene. Low-energy and low-cost resource utilization of the trifluoromethane is achieved, and the environmental harm caused by direct emission of the trifluoromethane is avoided; and a catalyst is not used in the method, so that the problems of catalyst coking deactivation, reactant carbonization and device blockage at high temperature are avoided.

Resource utilization method of trifluoromethane

The invention provides a catalyst for preparing tetrafluoroethylene and hexafluoropropylene through catalytic cracking of trifluoromethane and a preparation method thereof. The catalyst is prepared through the steps of preparing a precursor from a carrier and an active component through an impregnation method and then carrying out roasting and trifluoromethane fluorination; the carrier is Al2O3 orAlF3; the active component is one or a combination of two of nitride and nitrate of Cs, La, Sm, Pd, Pt, K or Na. The preparation method provided by the invention is simple, is capable of catalytically cracking the trifluoromethane under lower temperature and mild conditions, and is low in equipment requirements, low in energy consumption and low in cost; the prepared catalyst is capable of effectively reducing the reaction temperature of the catalytic cracking of the trifluoromethane, the conversion rate of raw materials and selective increment of a target product can be realized under milderconditions, the problem of coking of the catalyst can be effectively solved, and the service life of the catalyst can be prolonged.

Catalyst for preparing tetrafluoroethylene and hexafluoropropylene through catalytic cracking of trifluoromethane and preparation method thereof

The invention relates to a resource utilization method of chlorofluorocarbons Halogenated ethane is adopted as a raw material, and is reacted with an alcohol under different catalyst conditions at a certain temperature in a certain material ratio and then fluorinated to prepare hydrofluoroether The raw material can also be reacted with hydrogen under different catalyst conditions at a certain temperature in a certain material ratio to prepare difluorochloroethane or difluoroethane The method provides novel methods and ideas for downstream product development of the chlorofluorocarbons, avoids separation and process problems of fluorochloroethylenes such as trifluoroethylene and difluorochloroethylene, and produces products having certain market and economic value, such as the difluorochloroethane and the hydrofluoroether, by utilizing addition, hydrogenation, and other reactions The method has potential utilization value and is of great industrial application significance The method effectively prolongs service lifetime of catalysts, effectively utilizes intermediates such as the difluorochloroethylene, and is simple and efficient

A resource utilization method of chlorofluorocarbons

The invention relates to a method of preparing hydrofluoroether (HFE) from 1,1,1,2-tetrafluoroethane taken as raw material The method comprises the following steps: adding a catalyst into a gas phase reactor, introducing N2 into the reactor, drying the catalyst in an atmosphere of N2, stopping introducing N2; continuously introducing 1,1,1,2-tetrafluoroethane, carrying out reactions for 1 to 10 hours at a temperature of 250 to 550 DEG C to remove HF, washing, drying to obtain an intermediate A; carrying out addition reactions between the intermediate A and alcohols for 5 to 10 hours at a temperature of 50 to 150 DEG C under a pressure of 01-08 MPa under the effect of alkalis, and finally distilling the reaction product to obtain HEF HEF is directly prepared by a two step method, which can avoid trifluoroethylene separation The method can solve the problem that a HEF product is hard to prepare because a trifluoroethylene pure product is hard to prepare and separate The yield and selectivity of HEF are effectively improved

Method of preparing hydrofluoroether (HFE) from 1,1,1,2-tetrafluoroethane taken as raw material

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