| 摘要 |
1351331 Dehydrogenating olefins GOODYEAR TIRE & RUBBER CO 23 July 1971 [24 Aug 1970] 34620/71 Heading C5E Olefins are dehydrogenated to diolefins in the presence of at least one metal selected from Na, Li, K, Cs, Mg, Ca, Sr and Ba which may be supported on a porous support such as activated carbon, graphite, Al 2 O 3 , SiO 2 , SiO 2 -Al 2 O 3 , MgO, carbonates, TiO 2 , ZrO 2 or Cr 2 O 3 . The dehydrogenation may be carried out at 350-800‹ C., with residence times from 0À01 seconds to 5 minutes optionally in the presence of an inert diluent. Examples describe the preparation of isoprene, piperylene and dimethylbutadiene. |
