元素量比对Cu-Ni二元脂肪醇胺化催化剂性能的影响  

Effects of Element Mole Ratio on the Properties of the Cu-Ni Catalysts for the Amination of Fatty Alcohols

作　　者：李秋小[1] 张高勇[1] 彭少逸[2] 

机构地区：[1]中国日用化学工业研究院,山西太原030001 [2]中国科学院山西煤炭化学研究所,山西太原030001

出　　处：《精细化工》2003年第3期151-156,共6页Fine Chemicals

摘　　要：制备了Cu、Ni元素量比不同的以CaCO3为载体的9个催化剂,进行了各催化剂样品对月桂醇催化胺化的评价实验,用XPS进行催化剂还原后Cu、Ni价态的分析,通过XPS谱峰的计算机拟合得到了催化剂还原后Cu、Ni元素还原程度的定量结果。实验结果表明,催化剂的选择性(主要表现为胺化副产物双长链烷基叔胺的含量)和催化剂中Ni的还原性能密切相关。当催化剂中Ni2+不易还原时,胺化评价产物中双长链烷基叔胺的质量分数小于2 1%,当催化剂中x(Ni0)分别为22 7%、20 4%、14 8%及7 9%时,催化剂胺化评价产物中双长链烷基叔胺的质量分数分别为13.0%、11.7%、10.8%及5.2%。催化剂还原后Ni0的比例越大,则胺化反应产物中双长链烷基甲基叔胺的质量分数越高,催化剂的选择性越差。Nine CaCO3 supported Cu-Ni catalysts with different Cu-Ni mole ratios were prepared and tested by amination reaction of lauryl alcohol with dimethylamine.The degree of reduction of Cu and Ni in the catalysts was measured with XPS.The quantitative result of the contents of reduced Cu and Ni in the reduced catalysts were obtained by computer fitting of the XPS peaks.Experimental result shows that selectivity of the catalysts is closely related to the degree of reduction of Ni.When Ni2+ in the catalysts can not be reduced,the mass fraction of byproduct didodecylmethylamine in the amination products is less than 21%. When mole fractions of Ni0 〔x(Ni0)〕in the catalysts are 227%,204%,148% and 79%,the mass fractions of didodecylmethylamine in amination products are 130%,117%,108% and 52% respectively.The higher the content of Ni0 in the reduced catalyst,the higher the amount of didodecylmethylamine in the amination product,i.e. the lower the selectivity of the catalyst for the amination of fatty alcohols.

关 键 词：元素量比 铜镍催化剂 二元脂肪醇 胺化 催化剂 性能 影响 选择性 还原程度 

分 类 号：TQ426.82[化学工程] TQ223.162