含硫废镍渣生产硫酸镍过程中钙镁的脱除

研究了用含硫废镍渣生产硫酸镍过程中钙镁杂质的脱除方法 ,结果表明 :当温度为 80℃ ,pH值为 5 .0～6 .0 ,沉淀剂的用量超过理论值 5 0 % ,反应时间 1h以上 ,静置 3h ,钙镁杂质脱除效果良好 ,生产出的硫酸镍产品达到GB6 392 - 86 ,适用于电池、电镀、蓄电池等工业。

用废镍铝合金粉制备镍催化剂

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％。

PREPARATION OF BAGASSE XANTHATES （BX） AND NICKEL REMOVAL FROM WASTEWATER BY BX

Water-insoluble bagasse xanthates were prepared by xanthation of alkalified celluloses by treating bagasse with chromium hydroxide reauction effluent.The removel of nickel from both test solutions and electroplating industrial wastewater samples with BX was investigated. The process was studied taking into account such parameters as pH of water, precipitation time, xanthate dosage and storage time of BX. These products were found to be highly efficient in removing nickel. The residual con centration of nickel after treatment can be reduced to a value Of the ordor of 0. 01mg·1￣-1.