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碳四烃综合利用研究及评述 总被引:1,自引:0,他引:1
本文对石油炼制和石油加工过程产生的碳四烃进行了评述,重点阐述了正丁烷、异丁烷、正丁烯、异丁烯、丁二烯的化工利用及工艺概况.同时对丁二烯、异丁烯及1-丁烯的分离进行了阐述.并提出我国应当加大对烯烃的化工利用及烷烃转化烯烃的研究. 相似文献
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Yongchen Shang Wenxiang Zhang Mingjun Jia Piaoping Yang Dazhen Jiang Tonghao Wu 《Reaction Kinetics and Catalysis Letters》2005,85(2):245-251
Summary Modification of HMCM-22 zeolite with tetraethoxysilane (TEOS) can considerably improve the catalytic performances, especially the selectivity to isobutene, for the reaction of n-butene skeletal isomerization. 相似文献
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Jiyu Cui Zhaoqiang Zhang Bin Tan Yuanbin Zhang Pengcheng Wang Xili Cui Huabin Xing 《化学:亚洲杂志》2019,14(20):3572-3576
Efficient separation of n‐butene (n‐C4H8) and iso‐butene (iso‐C4H8) is of significance for the upgrading of C4 olefins to high‐value end products but remains one of the major challenges in hydrocarbon purifications owing to their similar structures. Herein, we report a flexible metal‐organic framework, MnINA (INA=isonicotinate), featuring one‐dimensional pore channels with periodically large pocket‐like cavities connected by narrow bottlenecks, for the first time for efficient n‐/iso‐C4H8 separation. MnINA with smaller pore size (4.62 Å) compared with CuINA (4.84 Å), exhibits steep adsorption isotherms and high capacity of 1.79 mmol g?1 for n‐C4H8 (4.46 Å) through strong host‐guest interactions via C?H???π bonding. The narrow bottlenecks exert barriers for the large molecules of iso‐C4H8 (4.84 Å) within the gate‐opening pressure range of 0–0.1 bar. This gives rise to MnINA with excellent separation selectivity of 327.7 for n‐/iso‐C4H8 mixture. The adsorption mechanism for n‐C4H8 and the gate‐opening effect were investigated by dispersion‐corrected density functional (DFT‐D) theory, verifying the strong interactions between n‐C4H8 and the frameworks as well as the gate‐opening effect derived from the rotation of organic linkers. The breakthrough tests confirmed MnINA and CuINA can be promising candidates for n‐/iso‐C4H8 separation. 相似文献
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