Mo－Ni／HM催化剂的研究

研制应用于正戊烷异构化的非贵金属催化剂Ｍｏ－Ｎｉ０／ＨＭ。以丝光沸石作载体，经两次２ｍｏｌ／Ｌ的ＮＨ４ＮＯ３铵交换，一次质量分数为０．３６的乙酸交换；用常规方法在室温下先后浸渍活性组分Ｍｏ，助催化剂组分Ｎｉ，ｗ（Ｍｏ）与ｗ（Ｎｉ）的最佳配比为３．２％：１．０％，焙烧温度为４７５℃。在临氢高压微反－色谱联合装置上对该催化剂进行考察，工艺条件为：反应温度３４０℃，压力３．０ＭＰａ，空速１．０ｈ－１，氢油摩尔比４：１。结果为：异戊烷收率达到５５．２％，≥Ｃ５液体收率为９５．２％。研究表明，此催化剂具有活性高，选择性好，成本低等特点，异构化性能优于只用两次铵交换、不同焙烧温度的其它催化剂。

STUDY ON THE Mo-Ni/HM CATALYSTS

A non-noble metal Mo-Ni/HM catalyst for the isomerization of n-pentane has been prepared by the method comprising ion-exchanging. The mordenite supports with 2 mol/L ammonium nitrate solution twice,followed by 36% acetic acid treatment, and incorporating the active component Mo and Ni into the supports by impregnation at room temperature.The optimum ratio(weight)of Mo and Ni is 0.0 32:0.010(weight)and appropriate calcination temperature lies at 475 ℃. The catalyst has been investigated in the hydrogenated pressurized microreactor chromatography unit.Under the optimum processing condition of 340 ℃,3. 0 MPa, WHSV=1.0h-1 and H2/nC5H12=4:1,the yield of iC5and≥C5 liquid products was 55.2% and 95.2% respectively.The results indicate that the catalyst has a higher activity and selectivity at a lower cost. The isomerization behavior of the catalyst is better than those using only ion-exchanged with ammonium nitrate solution twice or calcinated at different temperatures.