磷钼酸改性骨架铜催化剂上巴豆醛选择加氢制巴豆醇的研究

Selective hydrogenation of crotonaldehyde to crotyl alcoholon Raney copper modified by H_3PMo_(12)O_(40)

采用磷钼酸（H3PMo12O40）对骨架铜催化剂（Raney Cu）进行改性，并以巴豆醛选择加氢反应为探针反应，考察了（H3PMo12O40）负载量和焙烧温度对Raney Cu催化剂性能的影响。研究表明，随着H3PMo12O40柏负载量的增加，催化剂对巴豆醇的选择性上升，当负载H3PMo12O40质量分数达到7．2％时，催化剂对巴豆醇的选择性达到最高，为35．8％，而未改性的Raney Cu催化剂对巴豆醇的选择性只有0．32％。还考察了磷钼酸改性的骨架铜催化剂上巴豆醛选择加氢反应的工艺条件，研究表明，反应温度、反应压力和催化剂用量对巴豆醛的转化率有较大的影响，但对巴豆醇的选择性影响较小。适宜的反应条件为：H2分压0．6MPa，温度333K，催化剂用量0．30～0．35g·（mL-CRAL）^-1，此时巴豆醇的收率约25％。

Raney copper was modified by H3PMo12O40 and tested using the selective hydrogenation of crotonaldehyde （CRAL） to crotyl alcohol （CROL） as the probe reaction. Influence of loadings of H3PMo12O40 loaded on Raney copper and calcination temperature on properties of the catalysts was investigated, The resuhs showed that selectivity to crotyl alcohol increased with loadings of H3PMo12O40 on Raney copper, with selectivity of 35.8% over modified Raney copper with H3PMo12O40loadings of 7.2%, compared with selectivity of 0.32% over unmodified Raney copper. The reaction condition for selective hydrogenation of crotonaldehyde to crotyl alcohol was investigated. Reaction temperature, reaction pressure and dosage of the catalyst had significant effects on conversion of crotonaldehyde, but had little effects on selectivity to crotyl alcohol. The optimum reaction condition was as follows： H2 pressure 0.6 MPa, temperature 333 K, dosage of the catalyst 0.30-0.35 g · （mL-CRAL）^-1. CROL yield of 25% was attained under the optimum condition.