| 摘要 |
PURPOSE:To produce the titled compound in high purity, economically and efficiently, by hydrogenating a 5C fraction obtained as an isoprene-extraction residue in the presence of a group VIII metal catalyst, removing the catalyst and the low-boiling fraction, and isomerizing the crude product in the presence of aluminum chloride catalyst under heating. CONSTITUTION:A 5C fraction obtained as an isoprene-extraction residue is hydrogenated in the presence of a catalyst containing a group VIII metal as an active component. The catalyst is removed and a low-boiling fraction is distilled out to obtain a slurry 5C fraction preferably containing 50-97wt% endo-TCD of formula II. Preferably 0.1-10wt% AlCl3 based on the 5C fraction, is added as a catalyst to the slurry, and the mixture is heated preferably at 55-90 deg.C for 5- 50hr to isomerize the endo-TCD to exo-TCD of formula I . The catalyst is removed from the reaction mixture, and the objective exo-TCD useful as a jet fuel is obtained economically and easily by the distillation of the reaction mixture. |
