GAS-LIQUID BIPHASE C8 AROMATICS ISOMERIZATION TECHNOLOGY AND APPLICATION EVALUATION

Abstract

Abstract: The processing capacity of C₈ aromatics (mixture of xylene and ethylbenzene) in gas phase isomerization unit and liquid phase isomerization unit and the scale of corresponding separation unit under different working conditions were compared and analyzed by means of material balance method. The results show that the problem of low conversion of ethylbenzene in liquid phase is solved by the parallel process of gas and liquid phase isomerization, and the overall technical economy of isomerization unit is improved. Moreover, in the combined process of gas and liquid phase isomerization, the isomerization rate of liquid phase isomerization catalyst and the conversion of ethylbenzene of gas phase isomerization unit can be adjusted by reaction temperature and pressure, and the content of each component in the xylene circuit can be adjusted to meet the diversified production needs of chemicals.

Key words: liquid phase, gas phase, C₈ aromatics, isomerization, parallel process, ethylbenzene, xylene isomer

References

[1]刘中勋, 秦朝晖, 康承琳, 等.脱乙基型芳烃异构化催化剂的工业应用[J].石油化工, 2024, 3(5):713-717 [2]牛俊峰, 梁战桥.二甲苯异构化工业过程中副反应的控制[J].石油化工, 2015, 44(1):89-93 [3]吴巍.芳烃联合装置生产技术进展及成套技术开发[J].石油学报石油加工, 2015, 31(2):275-281 [4]周震寰, 康承琳, 张爱军, 等.二甲苯异构化反应机理研究及催化剂的改进[J].石油炼制与化工, 2017, 48(9):10-16 [5]Guisnet M, Gnep N S, Morin S.Mechanisms of xylene isomerization over acidic solid catalysts[J] 2000, 35/36: 47-59.[J].Microporous and Mesoporous Materials, 2000, 35-36(1):47-59 [6]康承琳, 周震寰, 吴巍, 等.乙基环己烷在择形分子筛上的异构化反应[J].石油炼制与化工, 2012, 43(5):1-5 [7]Hopper J R, Shigemura D S.Kinetics of liquid phase xylene isomerization over H-Mordenite[J].[J].AIChE Journal, 1973, 19(5):1025-1032 [8]Sen Sarma P K, Bhatia S.Liquid phase xylene isomerization over nickel hydrogen mordenite catalyst[J].Zeolites, 1987, 7(6):511-516 [9]秦关林, 武传昌, 周健生, 等.ZSM-4沸石分子筛上二甲苯液相异构化的探索[J].[J].石油炼制, 1978, (7):12-15 [10]秦关林, 武传昌, 周健生.二甲苯液相异构化催化剂的探讨[J].石油化工, 1978, 7(3):222-227 [11]秦关林, 武传昌, 穆荣华, 等.小晶粒ZSM-5沸石分子筛的合成及其二甲苯液相异构化性能[J].石油炼制, 1978, 11/12:85-87+136.[J].石油炼制, 1978, (C1):85-87,134 [12]Shi Qian, Gon?alves J C, Ferreira A F P, et al.Xylene Isomerization over Beta Zeolites in Liquid Phase[J].[J].Industrial & Engineering Chemistry Research, 2018, 57(16):5568-5579 [13]Shi Qian, Gon?alvesa J C, Ferreira A F P, et al.Xylene isomerization side reactions over Beta zeolite: Disproportionation and transalkylation of C8 aromatics and toluene [J].[J].Applied Catalysis A: General, 2018, 562(0):198-205 [14]Gon?alves J C, Rodrigues A E.Xylene isomerization in the liquid phase using large-pore zeolites[J].Chemical Engineering & Technology, 2016, 39(2):225-232 [15]Sakaguchi T, Molinier M.Maximizing existing xylene loop profitability[J].Hydrocarbon Processing, 2019, 98(1):53-55 [16]晓欣.二甲苯液相异构化新工艺及其工业化应用[J].石油石化绿色低碳, 2020, 2(5):77-78 [17]Mhatre S, Warke V, Choi A, et al.A new liquid-phase isomerization process for xylene loop debottleneck and energy savings[J].Hydrocarbon Processing, 2020, 99(1):47-50

GAS-LIQUID BIPHASE C₈ AROMATICS ISOMERIZATION TECHNOLOGY AND APPLICATION EVALUATION

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