高活性白油加氢催化剂RLF-20的开发

DEVELOPMENT OF HIGHLY ACTIVE WHITE OIL HYDROGENATION CATALYST RLF-20

在优选载体、金属配比、适当提高活性金属负载量以及开发活性金属分散技术的基础上开发了第二代贵金属白油加氢催化剂RLF-20,以中国石油克拉玛依石化公司KN4010橡胶填充油为原料油在中型装置上进行活性评价。结果表明:RLF-20与现有白油加氢催化剂RLF-10W相比,在空速提高25%的情况下产品性质仍能达到食品级白油质量标准;抗硫中毒实验结果表明,与RLF-10W相比,通过提高金属含量以及采用新的分散技术制备的RLF-20催化剂的抗硫性能得到明显提高,其初期脱芳烃率可达87%,运转7天后为85%,下降幅度仅为2.3%。采用中国石化杭州炼油厂提供的芳烃质量分数在10%以上的68号橡胶油为原料,在工艺条件不变的情况下,考察了RLF-20的活性稳定性,结果表明,经过1 000多小时的稳定运转,加氢产品275nm处的紫外吸光度由运转初期的0.4左右升高到0.6左右,变化幅度不大,完全可以稳定生产合格的食品级白油产品,说明RLF-20催化剂在长期运转过程中具有优异的活性及稳定性。

A highly active catalyst RLF-20 for white oil production is developed by optimizing carrier,metal ratio,metal loading,and using metal dispersion technology.A pilot plant test was done using KN4010 rubber filling oil from Kelamay refinery of CNPC as the feed.The results reveal that the product meets the quality standard for food grade white oil at LHSV,25% higher than the original catalyst RLF-10 W.The sulfur resistance of RLF-20 is also improved.The aromatics removal rate in the early stage reaches 87%,then decreases to 85%after 7days running,only 2.3%less.Under the same conditions,No.68 rubber filling oil with more than 10% aromatics from Hangzhou Refinery of SINOPEC was used to do the stability test.The 1 000 hstability test demonstrates that small changes in UV adsorption at 275 nm only from 0.4in the initial stage to about 0.6are observed,which indicate a good stability of RLF-20 for food grade white oil production.