光照下非贵金属催化的1-辛烯转移加氢反应

Catalytic Transfer Hydrogenation of 1-Octene with Non-precious Metal under Irradiation

光照下,以甲醇为氢源,以NiCl2、Ni(OAc)2或CoCl2为催化剂,1-辛烯可以发生催化转移加氢反应,得到辛烷,主要副产物为双键异构的2-辛烯和3-辛烯。综合催化剂的加氢活性和产物辛烷的选择性,NiCl2的催化效果最好,且NiCl2的催化活性在293～333K范围内随温度升高而增加。以NiCl2为催化剂,在反应体系中添加三正丁胺,于293K下反应24h,辛烷的产率由45%提高到65%,选择性由57%提高到70%。

The catalytic transfer hydrogenation of 1-octene to octane was carried out by using methanol as hydrogen donor and nickel and cobalt salts （such as NiCl2 , Ni（OAc）2 or COCl2 ） as catalysts under irradiation. The major byproducts were 2-octene and 3-octene from isomerization of C =C. Among these catalysts, NiCl2 was the most efficient in terms of octane yield and selectivity. Furthermore, the catalytic activity of NiCl2 increased at the elevated temperature （293- 333K）. It was beneficial to the hydrogenation and restrained the side-reaction by adding tri-n-hutylamine into reactive system, the yield of octane was increased from 45 % to 65 % and the selectivity of octane improved from 57 % to 70 % with NiC12 as catalyst at 293K after 24h.