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Synthesis of tert-amylbenzene for side-chain alkylation of cumene catalyzed by a solid superbase
Green Processing and Synthesis ( IF 4.3 ) Pub Date : 2021-01-01 , DOI: 10.1515/gps-2021-0068
Xin Zhou 1 , Ge Gao 1 , Guangxiang He 1 , Xiaoyan Guo 1 , Haibo Jin 1 , Lei Ma 1
Affiliation  

Abstract The side-chain alkylation of cumene and ethylene over a solid superbase catalyst K/KOH/γ-Al2O3 is investigated. The effects of the reaction temperature, pressure, and time on the conversion of cumene and selectivity of tert-amylbenzene (TAB) are discussed. The experimental results show that the conversion of cumene to tert-pentylbenzene increases with the increase in reaction temperature and ethylene pressure. The catalytic reaction has certain operational flexibility in terms of the reaction temperature, pressure, and time. In addition, the catalytic reaction can achieve directional conversion. The optimum operating conditions are obtained using a single factor test. The conversion of cumene is 99.8% and the selectivity toward TAB is 97.9% under catalyst concentration of 4 wt%, reaction temperature of 55°C, reaction pressure of 0.45 MPa, and reaction time of 30 min. The deactivation of catalyst is mainly caused by oxygen and water in the raw material.

中文翻译:

固体超碱催化异丙苯侧链烷基化合成叔戊基苯

摘要 研究了在固体超强碱催化剂K/KOH/γ-Al2O3上异丙苯和乙烯的侧链烷基化反应。讨论了反应温度、压力和时间对异丙苯转化率和叔戊基苯(TAB)选择性的影响。实验结果表明,异丙苯转化为叔戊基苯的转化率随着反应温度和乙烯压力的升高而增加。该催化反应在反应温度、压力和时间方面具有一定的操作灵活性。此外,催化反应可以实现定向转化。使用单因素测试获得最佳操作条件。在催化剂浓度为 4 wt%、反应温度为 55°C、反应压力0.45 MPa,反应时间30 min。催化剂失活主要是原料中的氧和水造成的。
更新日期:2021-01-01
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