Update: refrigerant replacement process tetrachloroethylene is expected to be used in the preparation of new refrigerant

refrigerant substitution process update: tetrachloroethylene is expected to be used for the preparation of new refrigerant: as Is the CFC - 123 And CFC - 11 A substitute for the 113, its purpose is to replace CFC - top priority 11 is used as refrigerant, used in low pressure centrifugal water chillers, and has been recognized by the world. 结束前, 123 also as part of the mixed agent instead of halon 1211 and 1302. In addition, as 123 also can be used as a cleaning agent and foaming agent.

　　HCFC- Used instead of CFC - 124 114, used as a water chiller refrigerants, in a variety of applications such as centrifugal chiller, also as replace CFC - today 12 R - mixed working medium And R - 401 409 the primary component, used as a medium temperature refrigerants.

　　HFC- First used for confecting blended refrigerant R - 125 404年,R - 407C、R- A and R - 401 507 a, R - instead And as of 502 22 for low and medium temperature refrigeration. HFC - 125 also can replace halon 1301. International is HFC - 2003 125 the device to 2. 30000 tons/year. As the R - 502、HCFC- 22 out of HFC - The 125 market demand will increase agility, its producing ability will also be agile growth.

　　HCFC- 123、HCFC- And HFC - 124 The fruit of the 125 road has 2: ( 1) Trichloroethylene as raw material, the first by the HF gas add up and get as catalytic fluorination 133 a, again as chloride 123, and then by the as 123 as gas phase fluorination system 124、HFC- 125; ( 2) Tetrachloroethylene as raw material by HF gas additive, catalytic fluorination as system 123、HCFC- And HFC - 124 125. Skills from economic analysis to tetrachloroethylene gas phase fluorination reaction path, the HFC - The output of 125 than as The output of 124.

tetrachloroethylene can also produce HFC - 134 a, divided into 2 steps: first step with tetrachloroethylene, HF, CI2 as raw materials, in the presence of ALF3 catalyst for chlorine gas phase fluorination reaction, get a CFC - 114a、CFC- And a small amount of CFC - 114 115, and then in 100 ~ 350 ℃ and Pd C the presence of catalyst for hydrogen reaction solution, HFC - 134 a and other by-products.

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