Abstract: A continuous preparation technology of FCC catalyst slurry gel was developed, and the industrial sideline test unit of continuous preparation/grinding was designed. The industrial test of continuous preparation of catalyst slurry gel with the capacity(dry basis) of 3 t/h and 6 t/h were carried out. The results show that the unit runs continuously and stably, and the feeding and discharging are smooth. Compared with intermittent technology of FCC catalyst slurry gel preparation, when the processing capacity(dry basis) was 3 t/h, both the two methods cost the same processing time, while the processing capacity(dry basis) was 6 t/h,the processing time was shortened by half and the power consumption were reduced by 56%-67%. The particle size of slurry gel prepared by continuous method was smaller,the catalyst prepared by continuous technology exhihited the lower average attrition resistence index by 0.6 percentage point, the higher micro-activity after aging at 100% steam for 17 h by 3.0 percentage points, showing the better hydrothermal stability.

Key words: continuous gel mixing, catalytic cracking, catalyst, gel grinding, catalyst gel