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    • 13. 发明授权
    • Catalyst demetallization by oxidation in a defined temperature range
    • 催化剂在规定的温度范围内通过氧化脱金属
    • US4163709A
    • 1979-08-07
    • US877438
    • 1978-02-13
    • Emmett H. BurkJin S. YooJohn A. KarchJui-Yuan Sun
    • Emmett H. BurkJin S. YooJohn A. KarchJui-Yuan Sun
    • B01J21/20B01J29/90B01J29/28B01J8/24C10G11/06
    • B01J21/20B01J29/90Y10S502/516Y10S502/517
    • In a catalytic cracking process wherein the cracking catalyst is poisoned and contaminated by metal present in the feedstock, an improved process for the removal of such metal poisons as nickel, iron and/or vanadium is employed which comprises contacting a regenerated and sulfided catalyst with an oxygen-containing gas in a defined temperature range of from about 525.degree. F. to about 725.degree. F. and washing at least a portion of the metal poisons from the catalyst. A preferred wash solution is a reductive wash medium comprising a saturated, aqueous solution of SO.sub.2. The vanadium and nickel metals may be recovered from the resultant used wash solution for possible metallurgical use. The washed catalyst may also be subjected to subsequent oxidative washes such as a hydrogen peroxide wash prior to its return to the catalytic cracking process.
    • 在催化裂化过程中,其中裂化催化剂被中和并且被原料中存在的金属污染,使用了一种用于去除诸如镍,铁和/或钒的金属毒素的改进方法,其包括使再生硫化催化剂与硫化催化剂与 含氧气体在约525°F至约725°F的限定温度范围内,并从催化剂洗涤至少一部分金属毒素。 优选的洗涤溶液是包含饱和的SO 2水溶液的还原洗涤介质。 钒和镍金属可以从所得到的洗涤溶液中回收,以便可能的冶金用途。 洗涤的催化剂也可以在其返回到催化裂化过程之前进行随后的氧化洗涤,例如过氧化氢洗涤。