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    • 10. 发明授权
    • Catalytic cracking process with partial CO combustion
    • 催化裂化过程与部分CO燃烧
    • US4980050A
    • 1990-12-25
    • US206241
    • 1988-06-10
    • Billy K. HuhTsoung Y. Yan
    • Billy K. HuhTsoung Y. Yan
    • C10G11/05C10G11/18
    • C10G11/05C10G11/18
    • A catalytic cracking process for converting heavy, metals laden feed to lighter products is disclosed. The catalyst regenerator is operated under relatively reducing conditions, to produce a flue gas containing at least 1 mole % carbon monoxide. An additive, preferably alumina, is added to the circulating catalyst inventory to selectively sorb metal contaminants in the feed. The reducing conditions in the catalyst regenerator minimize formation of highly oxidized forms of vanadium, permitting higher vanadium levels to be tolerated on the cracking catalyst. The additive material has a greater affinity for vanadium than the cracking catalyst, and absorbs a disproportionate amount of metals in the feed. Preferably a soft, friable, alumina additive is used which results in the production of alumina fines rich in vanadium, which are discharged from the unit with catalyst fines. The process works especially well in fluidized catalytic cracking processes, with removal of vanadium laden alumina fines from the FCC regenerator with the regenerator flue gas.
    • 公开了一种将重金属负载物转化为轻质产品的催化裂化方法。 催化剂再生器在相对减少的条件下运行,以产生含有至少1摩尔%一氧化碳的烟道气。 将添加剂,优选氧化铝加入到循环催化剂库存中,以选择性地吸附进料中的金属污染物。 催化剂再生器中的还原条件最小化高度氧化形式的钒的形成,允许在裂化催化剂上耐受更高的钒水平。 添加剂材料对钒的亲和力高于裂化催化剂,并且吸收进料中不成比例的金属。 优选地,使用柔软的,易碎的氧化铝添加剂,其导致富含钒的氧化铝细粉的生产,其从催化剂细粉中排出。 该方法在流化催化裂化过程中特别好,通过再生器烟气从FCC再生器中除去含钒的氧化铝细粉。