渣油裂解催化剂的再生

REGENERATION OF CATALYST USED FOR RESIDUAL OIL CRACKING

在渣油的流化催化裂化(FCC)中,来自原料的重金属(Ni,Fe,V等)连续沉积在催化剂上,使后者的活性和选择性严重下降,积炭量增加。为使这些失效的催化剂再生,从60年代末就开始了脱除沉积金属的研究。所用方法都涉及硫化,氧化等反应,处理时间长,操作繁杂,危害环境。本文进行了以盐酸再生裂解催化剂的探索研究,以开发简便有效的脱金属方法。

The hydrochloric acid has been used to reactivate the Ni, Fe-deposited fluid cracking catalyst. The results show that the HCl treatment can partly remove the nickel and the iron deposited on the catalyst and regenerate its activity, increasing the gasoline yield and decreasing the carbon deposit.The hydrothermal stability of the catalyst is not affected by the HCl treatment.