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    • 7. 发明授权
    • Process for producing polypropylene from C3 olefins selectively produced by a two stage fluid catalytic cracking process
    • 通过两阶段流化催化裂化方法选择性生产的C3烯烃生产聚丙烯的方法
    • US06258257B1
    • 2001-07-10
    • US09517551
    • 2000-03-02
    • George A. Swan, IIIMichael W. BedellPaul K. LadwigJohn E. AsplinGordon F. StuntzWilliam A. WachterB. Erik Henry
    • George A. Swan, IIIMichael W. BedellPaul K. LadwigJohn E. AsplinGordon F. StuntzWilliam A. WachterB. Erik Henry
    • C10G5102
    • C10G57/02C10G2400/20
    • A process for producing polymers from olefins selectively produced by a two stage process for selectively producing C2 to C4 olefins from a gas oil or resid is disclosed herein. The gas oil or resid is reacted in a first stage comprising a fluid catalytic cracking unit wherein it is converted in the presence of conventional large pore zeolitic catalyst to reaction products, including a naphtha boiling range stream. The naphtha boiling range stream is introduced into a second stage comprising a process unit containing a reaction zone, a stripping zone, a catalyst regeneration zone, and a fractionation zone. The naphtha feed is contacted in the reaction zone with a catalyst containing from about 10 to 50 wt. % of a crystalline zeolite having an average pore diameter less than about 0.7 nanometers at reaction conditions which include temperatures ranging from about 500 to 650° C. and a hydrocarbon partial pressure from about 10 to 40 psia. Vapor products are collected overhead and the catalyst particles are passed through the stripping zone on the way to the catalyst regeneration zone. Volatiles are stripped with steam in the stripping zone and the catalyst particles are sent to the catalyst regeneration zone where coke is burned from the catalyst, which is then recycled to the reaction zone.
    • 本文公开了一种通过二级方法选择性制备聚合物的方法,用于从瓦斯油或渣油中选择性地生产C2至C4烯烃。 瓦斯油或渣油在包括流化催化裂化装置的第一阶段中反应,其中在常规大孔沸石催化剂存在下将其转化为包括石脑油沸程的反应产物。 将石脑油沸程流引入包含含有反应区,汽提区,催化剂再生区和分馏区的处理单元的第二阶段。 石脑油进料在反应区中与含有约10至50wt。 在包括约500至650℃的温度和约10至40psia的烃分压的反应条件下具有平均孔径小于约0.7纳米的结晶沸石的百分比。 蒸气产物被顶部收集,催化剂颗粒在通向催化剂再生区的途中通过汽提区。 挥发物在汽提区中用蒸汽汽提,并将催化剂颗粒送入催化剂再生区,其中焦炭从催化剂燃烧,然后再循环到反应区。