Preparation and use of vinyl trifluoride

The present invention is an invention done to solve the above problem, a method of making HF0-1123 at a high selection rate stably, which aims to provide a way to make cheap raw material HFC-134a and solid reactant to react in a way that low molecular hydrocarbon system or high molecular carbon system like the generation of by-products, then, the following together to understand the preparation method and use of vinyl chloride trifluoride!

Method of manufacture of vinyl trifluoride

1 . Acetylene method

This method uses calcium carbide slag to produce acetylene and chlorine as raw materials to obtain 1,1,2,2 - tetrachloroethane, then add lime milk desalted hydrogen to obtain crude trichloroethylene, that is, due to the high acetylene price, ferric chloride as a catalyst for the liquid phase synthesis, often converted to the ethylene method.

2 . Direct chlorination of ethylene

The direct chlorination of ethylene gives a mixture of tetrachloroethane and pentachloroethane, and trichloroethylene and tetrachloroethylene are prepared by gas phase decomposition.

3 . Ethylene Oxychlorination

This method uses ethylene, oxygen (or air) and chlorine as raw materials to catalyse the chlorination and oxidation of trichloroethylene products and to produce tetrachloroethylene at the same time.

Uses of vinyl trifluoride

　　Vinyl trifluoride is an excellent solvent for use as a metal surface treatment agent, cleaning agent before electroplating and painting, metal degreasing agent and extractant for fats, oils and paraffins. It is used in the production of hexachloroethane, as a veterinary insect repellent, in organic synthesis and in the production of pesticides. Trichloroethylene is used in the preparation of tetrachloroethylene, as an intestinal wormer; for the prevention of hepatic and gastric leech disease in ruminant animals, testosterone and nematodes.

　　In the present invention, a layer consisting of a solid reactant (hereinafter referred to as the solid reactant layer). The "flowing state" refers to the state in which the particles of the solid reactant are suspended in the fluid, suspended, in a state in which the fluid, such as the raw material gas, is ejected and circulated in the upward direction (the direction opposite to the direction of gravity). The upward resistance, gravity and buoyancy caused by the fluid flow acting on the solid particles are balanced, and the entire solid reactant layer acts like a uniform fluid. At this point, the pressure loss when the fluid passes through the solid reactant layer is equal to the difference between gravity and buoyancy, and the pressure loss in the solid reactant layer will always remain constant due to the difference between gravity and buoyancy. To the extent that the flow state is maintained, even if the flow rate of the fluid is changed, this flow state of the solid reactant layer is called a fluidised bed or fluidised bed.

　　The high heat removal efficiency of the reaction heat in the fluidised bed reaction of vinyl chloride trifluoride makes it difficult for low molecular hydrocarbons and high molecular carbon (graphite) species to be generated as by-products and less likely to generate hot spots, thus allowing the HFC-134a by-product reaction (carbon-carbon bond breakage) to proceed. This prevents polymeric carbon from adhering to the solid reactant surface and causing a time-dependent reduction in HFC-134a conversion, and improves the selectivity of the R-1123 generation reaction. In addition, it is difficult to generate polymeric carbon as a by-product, and R-1123 can be obtained stably.

　　The above is the preparation method and use of vinyl trifluoride, for more information, please feel free to contact us!