石油炼制与化工 ›› 2022, Vol. 53 ›› Issue (4): 70-74.

• 加工工艺 • 上一篇    下一篇

芳烃联合装置抽余液生产间二甲苯工艺的工业应用

母志浩,宋杰   

  1. 宁波中金石化有限公司
  • 收稿日期:2021-12-01 修回日期:2021-12-15 出版日期:2022-04-12 发布日期:2022-03-29
  • 通讯作者: 母志浩 E-mail:zj_muzhihao@rong-sheng.com

COMMERCIAL APPLICATION OF m-XYLENE PRODUCTION PROCESS FROM RAFFINATE OF AROMATICS UNIT

  • Received:2021-12-01 Revised:2021-12-15 Online:2022-04-12 Published:2022-03-29

摘要: 介绍了宁波中金石化有限公司200 kt/a 间二甲苯(MX)吸附分离装置的工业应用情况。该装置于2020年建成投产,一次投料开车成功,为全球最大的MX生产装置。装置性能测试结果表明,MX产能达到203.3 kt/a,产品纯度(w)为99.53%,单程收率为95.1%。保持吸附剂在合适的水含量范围内可以有效提高吸附剂选择性,提高产品纯度和单程收率;苯为吸附剂的暂时性毒物,解吸剂中苯含量增加会降低吸附分离过程的单程收率。

关键词: C8芳烃, 间二甲苯, 吸附分离, 水含量

Abstract: The industrial application of a 200 kt/a m-xylene adsorption separation unit in ZhongJin Petrochemical Co. Ltd. was introduced. The unit was completed and began to be put into operation in 2020, which was the largest m-xylene production unit in the world. The test results show that the capacity of the unit is 203.3 kt/a, the purity of the m-xylene product is 99.53%, and the single-pass yield is 95.1%. The appropriate range of water content in the adsorbent is beneficial for the selectivity, which can improve the product purity and yield. In addition, benzene is a temporary poison for the adsorbent, and increasing benzene content in the desorbent will reduce the yield.

Key words: C8 aromatics, m-xylene, adsorptive separation, water content