| 摘要 |
1479631 Tri- and per-chloroethylenes LUMMUS CO 19 June 1974 [20 June 1973] 27229/74 Heading C2C Trichloro- and/or perchloro-ethylene are produced by (a) recovering, from a waste stream containing C 2 chlorinated hydrocarbons, the said chloroethylenes, if present, and waste C 2 chlorinated hydrocarbons convertible to trichloro- and/or perchloroethylenes, (b) contacting in a reaction zone at least a portion of the convertible chlorinated hydrocarbons with HC1 and/or Cl 2 and a molten mixture comprising the higher and lower valent chlorides of a multivalent metal and the oxychloride of the metal to produce a reaction effluent containing trichloro- and/or perchloroethylenes and convertible chlorinated hydrocarbons (c), recovering the trichloro- and/or perchloro-ethylene from the effluent and (d) recovering from the effluent and recycling to step (b) at least a portion of the convertible C 2 chlorinated hydrocarbons. The molten mixture is preferably CuCl, CuCl 2 and CuO.CuCl 2 and may be passed from the reaction zone to an oxidation zone in which it is contacted with molecular oxygen to regenerate the oxychloride and the molten mixture is passed to the reaction zone. Ethylene and/or ethane may be added to the supply of chlorinatable material in step (b). Chlorinated hydrocarbons heavier than C 2 H 2 C1 4 may be recovered from the waste stream and burned to give a combustion effluent which is introduced into the oxidation zone to recover chlorine values.
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