裂解汽油回收苯乙烯工艺(STED)的开发及应用  

DEVELOPMENT AND APPLICATION OF STYRENE RECOVERY PROCESS FROM PYROLYSIS GASOLINE

作　　者：赵明[1] 郁灼[1] 田龙胜[1] 唐文成[1] 庞伟伟 Zhao Ming;Yu Zhuo;Tian Longsheng;Tang Wencheng;Pang Weiwei(SINOPEC Research Institute of Petroleum Processing,Beijing 100083)

机构地区：[1]中国石化石油化工科学研究院,北京100083

出　　处：《石油炼制与化工》2021年第10期163-169,共7页Petroleum Processing and Petrochemicals

摘　　要：开发了裂解汽油抽提蒸馏苯乙烯(STED)成套工艺,首次实现从裂解汽油中回收高纯度苯乙烯产品,同时节省氢气实现二氧化碳减排。STED成套工艺包括选择性高且阻聚作用强的复合溶剂、反萃取-汽提组合溶剂再生、抽提蒸馏过程质量控制、以及苯乙烯高效脱色等技术。STED成套工艺已在7套装置实现长期稳定运行,各项参数达到设计要求。27 kt/a STED工业装置标定结果显示:产品苯乙烯纯度(w)为99.92%,色度(Pt-Co比色)小于10号,达到国家优级品标准;装置全流程回收率为95.8%。A complete set of process for extractive distillation of styrene from pyrolysis gasoline(STED)was developed.It was the first time to recover high purity styrene from pyrolysis gasoline,and at the same time to save hydrogen and to reduce carbon dioxide emission.The whole set of STED process includes composite solvent with high selectivity and strong polymerization inhibition,combined solvent regeneration of extraction and stripping,quality control of extractive distillation process,and efficient decolorization of styrene.The whole set of STED process has realized long-term stable operation in 7 sets of units,and all parameters meet the design requirements.The calibration results of a 27 kt/a STED industrial unit show that the purity of styrene product is 99.92%,and the platinum cobalt chroma is less than 10 which meets the national quality standard,and the recovery rate of the whole process is 95.8%.

关 键 词：裂解汽油 抽提蒸馏 苯乙烯 

分 类 号：TQ241.21[化学工程—有机化工]