金属离子和碱性氮化物对叠合醚化催化剂的影响  

INFLUENCE OF METAL CATIONS AND BASIC NITRATES ON THE PERFORMANCE OF DIMERIZATION-ETHERIFICATION CATALYST

作　　者：李韬[1] 温朗友[1] 俞芳[1] 喻惠利[1] 彭秋业[1] 

机构地区：[1]中国石化石油化工科学研究院

出　　处：《石油学报（石油加工）》2006年第3期18-23,共6页Acta Petrolei Sinica(Petroleum Processing Section)

基　　金：国家基础研究规划项目(G20000480-6)资助

摘　　要：通过对失活催化剂的分析表征确定金属离子和碱性氮化物的污染是引起叠合醚化催化剂失活的重要原因。考察了Na+、Fe2+和乙醇胺对叠合醚化催化剂的影响。结果表明,随着催化剂上积累的金属离子和碱性氮化物污染物的增多,催化剂的交换容量下降,异丁烯的转化率降低,产物中叠合产物比例减少;在污染程度相同的情况下,碱性氮化物对催化剂活性的影响强于金属离子,且碱性氮化物的存在会加剧催化剂的积炭;Na+引起的污染可以采用稀盐酸交换方法完全再生,而Fe2+和乙醇胺引起的污染再生较为困难。By analyzing and characterizing the deactivated catalyst, it was found that the contaminations of the dimerization-etherification catalyst from metal cations and basic nitrates were the main factor of the catalyst deactivation. With the amount of contaminant on the catalyst increasing, the concentration of acid sites decreased, resulting in the decrease of isobutene conversion and the selectivity of dimerization product. At the same degree of contamination from metal cations and basic nitrates, basic nitrates have more strong influence on the performance of catalyst than metal cations, because those basic nitrates may accelerate the cocking deactivation of the catalyst. The catalyst contaminated by Na^＋ can be completely regenerated by acid exchange, while those contaminated by Fe^2＋ and ethanolamine can only partly regenerated by acid exchange.

关 键 词：金属离子 碱性氮化物 叠合 醚化 树脂催化剂 失活 

分 类 号：TQ517.4[化学工程]