超细Ni-Cu-Co-La的制备及其催化乙腈加氢性能  

Preparation of Ultrafine Ni-Cu-Co-La Catalysts for Hydrogenation of Acetonitrile

作　　者：任飞[1] 李秋小[1] 

机构地区：[1]中国日用化学工业研究院,山西太原030001

出　　处：《催化学报》2007年第9期829-834,共6页

基　　金：科研院所技术开发研究专项资金(NCSTE-2006-JKZX-001).

摘　　要：以水合肼和硼氢化钾为共还原剂制备了四元合金催化剂Ni-Cu-Co-La,并将其应用于乙腈催化加氢反应.采用X射线衍射、X射线光电子能谱、透射电镜和H2程序升温脱附对催化剂进行了表征,考察了催化剂组分对乙腈选择性加氢制乙胺催化性能的影响.结果表明,Cu,Co和La的加入均不同程度地提高了催化剂的活性和选择性,在反应压力1.8 MPa,反应温度120℃,反应时间1 h的条件下,乙腈转化率和乙胺选择性分别为100%和98.24%,优于使用Raney Ni、非晶态Ni-B和Co-B合金催化剂时的结果.The ultrafine Ni-Cu-Co-La, being employed as an efficient catalyst for hydrogenation of acetonitrile to ethylamine, was prepared by co-reduction of the mixed solution of NiCl2·6H2O, CuSO4· 5H2O, COCl2· 6H2O, and LaCl3· 7H2O using hydrazine hydrate and potassium borohydride. X-ray diffraction, X-ray photoelectron spectroscopy, transmission electron microscopy, and temperature-programmed desorption were used for the characterization of the catalyst. It was found that Cu, Co, and La showed the positive effects on acetonitrile conversion and ethylamine yield. Under the conditions of 1.8 MPa, 120 ℃ , and 1 h, the conversion of acetonitrile and the selectivity for ethylamine reached 100 % and 98.24 % , respectively. For the hydrogenation of acetonitrile to etbylamine, the ultrafine Ni-Cu-Co-La catalyst exhibited higher activity and selectivity than other types of catalysts, such as Ni-B amorphous alloy, Co-B amorphous alloy, and Raney Ni catalyst.

关 键 词：液相催化加氢 镍 铜 钴 镧 乙腈 乙胺 

分 类 号：O643.32[理学—物理化学]