| abstract |
The invention relates to a flexible hydrocracking catalyst. Based on the weight of the catalyst, the composition comprises: 10-30wt% modified Y molecular sieve, 20-40wt% amorphous silica-alumina and 10-40wt% binder. The metal content is 25 to 35%. The modified Y molecular sieve is a small-grain mesoporous modified Y molecular sieve with significantly enhanced mesoporous properties, the molar ratio of silica to alumina is 8-20, and the sodium oxide content is less than 0.1 wt% , the unit cell parameters are 2.434~2.452nm, the relative crystallinity is 60~100%, and the mesoporous index M is 1.7~5.0. The flexible catalyst of the invention has the characteristics of high activity, high liquid yield and strong hydrogenation performance, and can further improve the liquid yield and the selectivity of middle distillate (jet fuel + diesel) while simultaneously producing heavy naphtha. and yield, the improvement of tail oil BMCI is greater. |