国产吸附剂RAX-3000专用NaX分子筛工业连续化生产研究

NaX分子筛作为国产PX吸附剂RAX-3000的载体,一直采用间歇式生产,产能低、质量稳定性较差。为了提高RAX-3000吸附剂的产能和质量,满足市场需求,进行了NaX分子筛工业连续化生产试验。通过对成胶配方优化、连续过滤水洗和干燥条件的研究,证实了连续化生产的可行性,并确定了连续化生产的最佳工艺参数。按照上述工艺参数进行工业生产,产品质量合格率较高。

RAX-3000型对二甲苯吸附剂的工业应用

介绍了RAX-3000型吸附剂的物化性能及在某企业的工业应用情况。该企业600 kt/a芳烃联合装置平稳运行5年以上,并在设计负荷的110%原料流量下进行标定,对二甲苯产品平均纯度为99.8%,平均收率为98.3%,超过了技术合同保证值。生产过程中,水平衡(装置排出的水量与注水量之比)控制在0.8~1.0之间,有利于提高吸附选择性。与参比剂的数据比对表明,RAX-3000型吸附剂在原料适应性、极端工况、吸附容量等方面性能更好。

Commercial Applications of Paraxylene Adsorbents RAX-2000A and RAX-3000

The RAX series paraxylene (PX) adsorbents RAX-2000A and RAX-3000, are developed by the Sinopec Research Institute of Petroleum Processing (RIPP) and manufactured by the Sinopec Catalyst Company. Performance test of RAX-2000A showed that the average purity of the PX product reached 99.81%, with an average PX yield of 98.6% per pass. The new generation of PX adsorbents, RAX-3000 not only retains most advantages of the adsorbent RAX-2000A, but also has higher selective adsorption capacity by at least 8%. The actual unit production capability of the adsorbent RAX-3000 was increased by about 18%. The RAX series PX adsorbents exhibited good adaptability to unfavorable feedstock containing high ethyl benzene (EB) fraction besides their better mechanical strength. Preliminary test results indicated that compared to the adsorbent RAX-2000A, the A/F a and D/F relating to the adsorbent RAX-3000 were notably decreased due to the higher selective adsorption capacity of the adsorbent RAX-3000.

国产芳烃技术工业应用长周期运行分析

国产芳烃技术首次大型工业化应用。中国石化海南炼油化工有限公司(简称海南炼化)采用国产芳烃技术连续3年稳定生产,连续产出高纯度PX产品和高收率,标志着国产吸附剂从小型化试验装置转向大型工业化应用装置,国产RAX-3000型吸附剂具有良好的选择性和吸附容量,具备长周期连续运行的条件,性能满足工业运行要求。