生产对二甲苯的异构化技术发展趋势
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摘要
综述了国内近年来对二甲苯装置运行状况,对未来几年内的行业发展趋势进行了预测。从增产对二甲苯的异构化工艺的现状与发展来看,乙苯脱烷基型异构化工艺具有处理能力大、乙苯转化率高的优势,预计将占据更多的市场份额。对原有转化型二甲苯异构化装置改造为脱烷基型工艺的实例进行了初步分析,尽管实施效果不如新建装置,但消除瓶颈、优化操作工艺等措施是现有装置扩能改建的有效技术途径。此外,还对芳烃生产技术前沿开展的创新研究与探索进行了展望。
The status of PX plant in China in recent years is summarized,and the industry development trend in the next few years is predicted.From the current situation and development of the isomerization process for increasing PX production,the ethylbenzene dealkylation process has the advantages of large processing capacity and high conversion rate of ethylbenzene,and is expected to occupy more market shares.An example of the transformation of the original converted type xylene isomerization device to the dealkylation process is analyzed.Although the implementation effect is not as good as the new device,the effective technical approach is to eliminate the bottleneck and optimize the operation process.In addition,the prospect of innovative research and exploration on the frontier of aromatics production technology is also presented.
The status of PX plant in China in recent years is summarized,and the industry development trend in the next few years is predicted.From the current situation and development of the isomerization process for increasing PX production,the ethylbenzene dealkylation process has the advantages of large processing capacity and high conversion rate of ethylbenzene,and is expected to occupy more market shares.An example of the transformation of the original converted type xylene isomerization device to the dealkylation process is analyzed.Although the implementation effect is not as good as the new device,the effective technical approach is to eliminate the bottleneck and optimize the operation process.In addition,the prospect of innovative research and exploration on the frontier of aromatics production technology is also presented.
引文
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[3]梁战桥,顾昊辉,吴巍.一种含改性NU-85沸石的复合沸石催化剂及其制备方法:中国,CN102671696B[P].2014-10-01
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[5]孙磊,梁战桥.新型二甲苯异构化催化剂RIC-270的工业应用[J].石油化工,2017,46(12):1532-1535
[6]南圣林,桂鹏,李凤生.PAI-01型C8芳烃异构化催化剂的工业应用及再生[J].安徽化工,2014,40(2):43-46
[7]于深波,侯强.国内外二甲苯异构化催化剂性能的比较[J].石油化工,2012,41(2):190-193
[8]侯强,梁战桥.RIC-200转化型二甲苯异构化催化剂的工业应用[J].石油化工,2011,40(12):1325-1329
[9]高俊魁,钟进,吴巍.一种EUO/介孔复合分子筛的制备方法:中国,CN102107143B[P].2012-07-18
[10]杨燕,曾世虎,吕永鑫.新型二甲苯异构化催化剂的工业生产及应用[J].当代化工,2014,43(8):1546-1548
[11]兰晓光.新型二甲苯异构化催化剂的工业应用[J].河南化工,2010,27(1):22-24
[12]戴厚良.芳烃技术[M].北京:中国石化出版社,2014:233-236
[13]Michael D,Elizabeth A,Tunde O.Potential applications of zeolite membranes in reaction coupling separation processes[J].Materials,2012(5):2101-2136
[14]John O,John P.Process for producing para-xylene:The United States,US 8692044B2[P].2014-04-08
[15]周震寰,贾树岩,张培贵,等.ZSM-5分子筛酸性修饰及探针分子表征[J].石油炼制与化工,2016,47(3):5-9
[16]范景新,臧甲忠,于海斌,等.重芳烃轻质化研究进展[J].工业催化,2015,23(9):666-673
[17]周震寰,张爱军,胡维军,等.碳八芳烃异构化分子筛的酸性与反应分析[J].石油炼制与化工,2017,48(11):76-81
[18]Frey S J,Corradi J T,Werba G.Processes for increasing the overall aromatics and xylenes yield in an aromatics complex:The United States,US 8431758B2[P].2013-04-30
[19]倪玲丽.离子液体催化二甲基呋喃温和转化合成对二甲苯[D].北京:中国科学院大学(中国科学院过程工程研究所),2017
[20]刘俊霞,陈景润,王军峰,等.生物质基呋喃制备对二甲苯研究进展[J].工业催化,2017,25(4):12-16