Co-Ni-B/SBA-15催化1-辛烯氢甲酰化活性研究

Study on catalytic performance of Co-Ni-B/SBA-15 for hydroformylation of 1-octene

超声辅助浸渍法制备了SBA-15分子筛负载三组分非晶态Co-Ni-B,研究了其对1-辛烯氢甲酰化制壬醛反应的催化性能。SBA-15负载纳米非晶态Co-Ni-B,增加了Co-Ni-B的分散;且非晶态Co-Ni-B转化为晶体的温度升高约280℃,耐热稳定性增强。Co-Ni-B/SBA-15催化剂,其中,Co=17.22%,n(Ni)/n(Co)=0.157,n(B)/n(Co+Ni)=0.434,用于120℃、5 MPa条件下氢甲酰化反应,间歇反应4 h,1-辛烯完全转化,壬醛选择性91.24%;相比Co-Ni-B,副产物减少一倍。催化剂重复使用五次,活性稳定。

SBA-15 zeolite supported amorphous ternary Co-Ni-B was prepared by the ultrasonic-assisted impregnation method for catalyzing the hydroformylation of 1-octene to nonanal.Supporting on SBA-15 increased the dispersion of nano amorphous Co-Ni-B.The crystallization temperature of amorphous Co-Ni-B was elevated by 280℃that improves the thermal stability of Co-Ni-B.Using Co-Ni-B/SBA-15 with Co loading of 17.22%and the ratio of n(Ni)/n(Co)of 0.157 and n(B)/n(Co+Ni)of 0.434,the conversion of 1-octene and the selectivity of nonanal reached 100%and 91.24%,respectively,in the hydroformylation reaction at 120℃and 5 MPa.The selectivity of side-product was reduced by 1 time compared with that of Co-Ni-B.The Co-Ni-B/SBA-15 is stable after repeated used for 5 times.