排序方式: 共有13条查询结果,搜索用时 15 毫秒
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改性Y分子筛对苯—丙烯烷基化反应中副产物正丙苯的影响 总被引:2,自引:0,他引:2
用FT-IR和MAS NMR方法探索了不同改性方法对Y分子筛表面酸性质的影响。研究结果表明,改性后分子筛骨架发生脱铝,酸性OH基团的FT-IR特征峰波数向低波数位移,骨架n(Si)/n(AI)增大,表面B酸中心减弱,L酸中心增强。B酸中心强度得到加强。催化剂评价结果表明,产物中副产物正丙苯的生成与分子筛表面B酸中心强度直接有关,其含量正比于Y分子筛表面B酸中心强度。 相似文献
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膜反应与膜反应器技术 总被引:2,自引:0,他引:2
概述了与催化功能分离膜、膜反应器相关的有机高分子膜、无机膜的分类和特性,并介绍了催化功能分离膜的作用原理、制备方法以及固定酶分离膜、高分子催化膜在生化和石油化工的应用实例。另外,还较详细地介绍了催化反应与膜分离复合技术,及其反应器的性能、特点和用于环己烷脱氢反应的研究。展示了膜反应与膜反应器技术的发展前景。 相似文献
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Quenching process and design of the quenching tower in acrylonitrile production in China were studied in order to decrease the polymerization loss of acrylonitrile in the quenching tower. Based on the research of acrylonitrile polymerization in the quenching tower, a new quenching process was proposed to avoid the disadvantages of the original process. Two kinds of internals were installed to improve the performance of the quenching tower. Through a series of air-flow and real-flow model experiments, the new quenching process and new design were showed to be successful in enhancing the mass and heat transfer in the vapor-liquid system and decreasing the loss of acrylonitrile.Industrial application showed satisfactory results of decrease of the acrylonitrile loss in the quenching tower by about 4.5% and increase of the acrylonitrile recovery of the whole plant by more than 4%. 相似文献
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