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均苯三酚的研究进展 被引量:3
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作者 谢广群 曹端林 王建龙 《中北大学学报(自然科学版)》 EI CAS 2007年第1期64-68,共5页
重点阐述了三硝基甲苯法和(异丙)苯法两种传统工业生产方法以及苯胺法、六氯苯法等新型合成路线,并对各种方法的收率、工艺条件及工业化可行性进行了分析;同时,介绍了均苯三酚在医药、染料等方面的应用现状与市场前景.
关键词 均苯三酚 三硝基甲苯法 (异丙)苯法
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Deactivation mechanism of beta-zeolite catalyst for synthesis of cumene by benzene alkylation with isopropanol 被引量:6
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作者 Yefei Liu Yang Zou +2 位作者 Hong Jiang Huanxin Gao Rizhi Chen 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2017年第9期1195-1201,共7页
The alkylation of benzene with isopropanol over beta-zeolite is a more cost-effective solution to cumene production. During the benzene alkylation cycles, the cumene selectivity slowly increased, while the benzene con... The alkylation of benzene with isopropanol over beta-zeolite is a more cost-effective solution to cumene production. During the benzene alkylation cycles, the cumene selectivity slowly increased, while the benzene conversion presented the sharp decrease due to catalyst deactivation. The deactivation mechanism of betazeolite catalyst was investigated by characterizing the fresh and used catalysts. The XRD, SEM and TEM results show that the crystalline and particle size of the beta-zeolite catalyst almost remained stable during the alkylation cycles. The drop in catalytic activity and benzene conversion could be explained by the TG, BET,NH_3-TPD and GC–MS results. The organic matters mainly consisted of ethylbenzene, p-xylene and 1-ethyl-3-(1-methyl) benzene produced in the benzene alkylation deposited in the catalyst, which strongly reduced the specific surface area of beta-zeolite catalyst. Moreover, during the reaction cycles, the amount of acidity also significantly decreased. As a result, the catalyst deactivation occurred. To maintain the catalytic performance,the catalyst regeneration was carried out by using ethanol rinse and calcination. The deactivated catalyst could be effectively regenerated by the calcination method and the good catalytic performance was obtained. 展开更多
关键词 cumene benzene ISOPROPANOL ALKYLATION BETA-ZEOLITE Catalyst deactivation
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