| 摘要 |
<p>1,235,992. Dehydrogenation process. LUMMUS CO. 21 Oct., 1969 [23 Oct., 1968], No. 51574/69. Heading C2C. [Also in Division C5] A mono halo-substituted alkane or cycloalkane is dehydrogenated by contacting the feed with a melt containing a multivalent metal halide in both its higher and lower valence states to give a product containing an olefinically unsaturated compound. The melt may comprise the chlorides of Cu, Mn, Co, Fe or Cr and preferably also a univalent metal halide. e.g. KCl. Reference is also made to halides of Zn, Ag and Tl. The melt may first be contacted with a free O 2 -containing gas. The process is preferably effected by continuous countercurrent contact in the vapour phase. Quench liquid and recovered catalyst may be recycled. Examples describe the reaction of ethyl chlbride with a melt comprising CuCl/CuCl 2 /KCl to give a product comprising mainly C 2 H 4 , C 2 H 3 Cl and C 2 H 4 Cl 2 .</p> |
