NiO/Al_2O_3的制备及其在羊毛脂加氢中的应用

Preparation of NiO/Al_2O_3 and Application in Lanolin Hydrogenation

以硝酸镍和氧化铝为前驱物,氢氧化钠为沉淀剂,采用共沉淀法制备负载型催化剂NiO/Al2O3,并将所制得的催化剂应用于羊毛脂加氢反应中。通过测定加氢产物的皂化值考察了催化剂质量分数、氢气压强、反应时间、反应温度等条件对羊毛脂加氢深度的影响。实验结果表明,在反应时间5h、反应温度300℃、氢气压强18MPa、催化剂质量分数5%的条件下,羊毛脂的加氢深度可达到93.47%。

NiO/Al2O3 was prepared using nickel nitrate and aluminum oxide as the precursor, sodium hydroxide as the precipitating agent by coprecipitation method which was applied in the hydrogenation of lanolin as a catalyst. The effect of reaction temperature, reaction pressure, reaction time and the mass fraction of catalyst on the depth of lanolin hydrogenation was measured by the saponification value. The results show that the optimal conditions are as follows： the mass fraction of catalyst is 5%, reaction pressure of 18 MPa, reaction time of 5 h at 300 ℃, and the depth of lanolin hydrogenation can be up to 93.47%.