用废镍铝合金粉制备镍催化剂

Preparation of Nickel Catalyst from Waste Alummel Powder

研究了以废镍铝合金粉（废镍渣）为原料、H2SO4为浸出剂、尿素为沉淀剂制备镍催化剂的方法；考察了Ni浸出条件对其浸出率的影响，并通过催化加氢实验对镍催化剂的活性进行了评价。Ni的浸出条件：w（H2SO4）25％、酸浸时间3h、n（废镍渣）：n（H2SO4）=1．0：1．4。在该条件下，Ni的浸出率为92．85％。Ni的回收率在90％以上。催化加氢实验结果表明，在温度120～125℃、压力大于或等于1．2MPa、催化剂用量1％（质量分数）的条件下，可将异丙叉丙酮经一步液相催化加氢反应制备成甲基异丁基甲醇（MBC），异丙叉丙酮转化率为100％，MIBC的收率达99．3％。

The preparation process for nickel catalyst was studied using waste alummel powder as raw material, H2SO4 as lixiviant and urea as precipitant. The effects of leaching conditions on the leaching efficiency of Ni were researched, and the activity of nickel catalyst was appraised by catalytic hydrogenation experiment. Under the leaching conditions of w （ H2 SO4 ） 25 %, acid leaching time 3 h, n （ waste nickel slag） ： n （ H2 SO4 ） of 1. 0 ： 1.4, the leaching rate of Ni is 92.85 % and the recovery of Ni is over 90%. The results of catalytic hydrogenation experiment show that when temperature is 120 - 125 ℃, pressure is above or equal to 1.2 MPa and the dosage of catalyst is 1% （mass fraction）, methyl isobutyl carbinol （MIBC） can be prepared from mesityl oxide by one-step catalytic hydrogenation in liquid phase with 100% of mesityl oxide conversion and 99.3% of MIBC yield.