摘要
介绍了吸附-结晶组合工艺生产PX的工艺流程以及与常规吸附分离工艺相比的优势。低浓度的PX原料先经简化的吸附分离工艺进行第一步分离,获得较高浓度的PX物料,再经由结晶分离的方法获得高纯度的PX产品。采用组合工艺一方面能降低吸附剂、解吸剂用量,另一方面装置能耗要低于常规吸附分离装置。尤其是在对全装置进行热联合和热集成优化后,能耗可以进一步大幅下降。
This paper introduces the adsorption-crystallization combined process used in PX production and the advantages of this process over conventional adsorptionseparation process. The PX feed with low concentration is first separated by simplified adsorption process to get PX material with higher concentration. Then PX product with high purity is produced by crystallization process.Adopting the combined process can reduce the amount of adsorbent and desorbent and energy consumption of the unit is lower than that of the conventional adsorption-separation process. Especially after optimizing the heat integration system of the whole unit,energy consumption can be further reduced greatly.
出处
《石油化工安全环保技术》
CAS
2016年第2期1-3,7,共4页
Petrochemical Safety and Environmental Protection Technology
关键词
对二甲苯
吸附
结晶
热集成
能耗
Paraxylene
Adsorption
Crystallization
Heat integration
Energy consumption
