Effect of Alkylaluminum Activators on Ethylene Trimerization Based on 2,5‐DMP/Cr(III)/TCE Catalyst System
Effect of Alkylaluminum Activators on Ethylene Trimerization Based on 2,5‐DMP/Cr(III)/TCE Catalyst System
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DOI：
10.1002/cjoc.201190215
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发表时间：
2011-06
影响因子：
5.4
通讯作者：
T. Jiang;R. Ji;Hong-xia Chen;Chengang Cao;Guoliang Mao;Ying-Jie Ning
中科院分区：
文献类型：
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作者：
T. Jiang;R. Ji;Hong-xia Chen;Chengang Cao;Guoliang Mao;Ying-Jie Ning
研究了2，5-二甲基吡咯（2，5-dichloropyrrole，2，5-dichloropyrrole，2，5-dichloropyrrole）/Cr（III）/烷基铝/四氯乙烷（TCE）体系催化乙烯三聚制1-己烯的反应。讨论了不同助催化剂对催化活性和产物选择性的影响。结果表明，三乙基铝（TEA）、三甲基铝（TMA）、三正己基铝（TNHA）和三异丁基铝（TIBA）都是乙烯三聚制1-己烯的有效助催化剂。结果表明，2，5-四氟丙烯/Cr（III）/TEA/TCE催化体系对乙烯三聚反应的催化效果最好，同时降低了副产物的生成。提出了烷基铝与活性铬物种在催化循环中的一些特定作用模式，以解释助催化剂对催化活性和1-己烯选择性的影响。
Ethylene trimerization toward 1-hexene catalytic system with 2,5-dimethylpyrrole (2,5-DMP)/Cr(III)/alkylaluminum/tetrachloroethane (TCE) was investigated. The effects of various cocatalysts on catalytic activity and product selectivity were discussed. The results showed that triethylaluminum (TEA), trimethylaluminum (TMA), tri-n-hexylaluminum (TNHA) and tri-isobutylaluminum (TIBA) were all effective cocatalysts for ethylene trimerization toward 1-hexene. 2,5-DMP/Cr(III)/TEA/TCE catalytic system afforded the best results for ethylene trimerization, while reducing the level of by-product formation. Some specific interaction modes of alkylaluminum with active Cr species in the catalytic cycle were proposed to explain the effect of cocatalyst on catalytic activity and 1-hexene selectivity.