加氢异构降凝催化剂RIW-2的开发及工业应用

DEVELOPMENT AND INDUSTRIAL APPLICATION OF HYDROISODEWAXING CATALYST RIW-2

针对以加氢裂化尾油、费-托合成油等多种原料生产优质润滑油基础油的要求,中国石化石油化工科学研究院开发了新一代润滑油异构降凝催化剂RIW-2。该催化剂具有良好的异构选择性、降凝活性、抗中毒性能和原料油适应性,其性能优于参比剂。考察了影响催化剂异构性能的多种工艺因素,结果表明:正构烷烃异构化存在一个最佳反应温度,同时随反应温度的提高,产物中多甲基异构烷烃含量增加;较低的氢分压有利于异构烷烃的生成,但会伴随着环烷烃的脱氢。该催化剂的工业应用结果表明,以加氢裂化尾油为原料,可以生产黏度指数大于120的API Ⅲ类润滑油基础油,收率大于70%。

The new generation catalyst RIW-2 for hydroisomerization and dewaxing of lube base oil was developed by SINOPEC Research Institute of Petrolemm Processing,which exhibited high hydroisomerization selectivity and dewaxing activity,good toxicity resistance and feed adaptability and was better than the reference catalyst. The comprehensive tests were conducted to investigate its performance and process conditions. The results showed that there was an optimal temperature for the paraffin isomerization,with the reaction temperature increase,more multi-methyl iso-paraffin were formed;lower hydrogen partial pressure was benefit for the isomerization reaction along with the dehydrogenation of cycloparaffin,leading to more aromatics. The industrial application results showed that using hydrocracking tail oils as raw materials,the API Ⅲ base oil with viscosity index greater than 120 could be produced with the yield greater than 70%.