Process for reducing coke formation in heavy feed catalytic cracking
    1.
    发明授权
    Process for reducing coke formation in heavy feed catalytic cracking 失效
    重质进料催化裂化中焦炭形成减少的方法

    公开(公告)号:US4409093A

    公开(公告)日:1983-10-11

    申请号:US285737

    申请日:1981-07-22

    CPC classification number: C10G11/02 C10G11/18

    Abstract: A method for decreasing the amount of coke produced during the cracking of hydrocarbon feedstock to lower molecular weight products in a reaction zone is disclosed, where the feedstock contains at least two metal contaminants selected from the class consisting of nickel, vanadium and iron, and where these contaminants become deposited on the catalyst. The method comprises passing catalyst from the reaction zone through a regeneration zone operated under net reducing conditions and through a reduction zone maintained at an elevated temperature for a time sufficient to at least partially passivate the catalyst.

    Abstract translation: 公开了一种在反应区中将烃原料裂解成较低分子量产物时产生的焦炭量减少的方法,其中原料含有选自镍,钒和铁的至少两种金属污染物,其中 这些污染物沉积在催化剂上。 该方法包括使来自反应区的催化剂通过在净还原条件下运行的再生区,并通过保持在升高温度下的还原区足以使催化剂至少部分钝化的时间。

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