Process for selectively producing C3 olefins in a fluid catalytic
cracking process
    43.
    发明授权
    Process for selectively producing C3 olefins in a fluid catalytic cracking process 失效
    在流化催化裂化过程中选择性生产C3烯烃的方法

    公开(公告)号:US6093867A

    公开(公告)日:2000-07-25

    申请号:US73083

    申请日:1998-05-05

    CPC classification number: C10G57/02 C10G2400/20

    Abstract: A process for selectively producing C.sub.3 olefins from a catalytically cracked or thermally cracked naphtha stream. The naphtha stream is introduced into a process unit comprised of a reaction zone, a stripping zone, a catalyst regeneration zone, and a fractionation zone. The naphtha feedstream 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.degree. to 650.degree. 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. Overhead products from the reaction zone are passed to a fractionation zone where a stream of C.sub.3 's is recovered and a stream rich in C.sub.4 and/or C.sub.5 olefins is recycled to the stripping zone.

    Abstract translation: 从催化裂化或热裂解的石脑油流中选择性生产C3烯烃的方法。 将石脑油流引入由反应区,汽提区,催化剂再生区和分馏区构成的工艺单元中。 石脑油原料流在反应区中与含有约10至50wt。 %的平均孔径小于约0.7纳米的结晶沸石在包括约500℃至650℃的温度和约10至40psia的烃分压的反应条件下进行。 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。 来自反应区的高架物质被送入分馏区,其中回收C3的物流,富含C4和/或C5烯烃的物流被循环到汽提区。

    Enhanced olefin yields in a catalytic process with diolefins
    49.
    发明授权
    Enhanced olefin yields in a catalytic process with diolefins 失效
    在二烯烃催化过程中提高烯烃产率

    公开(公告)号:US06090271A

    公开(公告)日:2000-07-18

    申请号:US872808

    申请日:1997-06-10

    CPC classification number: C10G11/00 C10G2400/20

    Abstract: The invention provides a process for improving the conversion of a hydrocarbon feedstock to light olefins comprising mixing a hydrocarbon feedstock with a diolefin to form a mixture; and thereafter contacting the mixture with a zeolite cracking catalyst. Preferably the catalyst is contacted at a reaction temperature within the range of about 500.degree. C. to about 750.degree. C. and the feedstock flows at a weight hourly space velocity in the range of about 0.1 Hr.sup.-1 WHSV to about 100 Hr.sup.-1 WHSV. The diolefin can be a straight, branched, or cyclic hydrocarbon having at least two II bonds. Preferably diolefin is a hydrocarbon of 4 to 20 carbons.

    Abstract translation: 本发明提供了一种改进烃原料转化为轻质烯烃的方法,包括将烃原料与二烯烃混合以形成混合物; 然后使该混合物与沸石裂化催化剂接触。 优选地,催化剂在约500℃至约750℃范围内的反应温度下接触,原料以约0.1Hr-1WHSV至约100Hr-1的重时空速流动 WHSV。 二烯烃可以是具有至少两个II键的直链,支链或环状烃。 二烯烃优选为4至20个碳的烃。

    Fluid cracking process for producing low emissions fuels
    50.
    发明授权
    Fluid cracking process for producing low emissions fuels 失效
    用于生产低排放燃料的流体裂解过程

    公开(公告)号:US5318695A

    公开(公告)日:1994-06-07

    申请号:US982933

    申请日:1992-11-30

    CPC classification number: C10G11/05

    Abstract: A fluid catalytic cracking process for producing relatively low emissions fuels. The feedstock is exceptionally low in nitrogen and aromatics and relatively high in hydrogen. The catalyst is an amorphous silica-alumina or a zeolitic material having a relatively small unit cell size. The feedstock can be characterized as having less than about 50 wppm nitrogen; greater than about 13 wt. % hydrogen; less than about 7.5 wt. % 2+ring aromatic cores; and not more than about 15 wt. % aromatic cores overall.

    Abstract translation: 用于生产相对低排放燃料的流化催化裂化方法。 原料的氮气和芳烃特别低,氢气相对较高。 该催化剂是具有相对小的晶胞尺寸的无定形二氧化硅 - 氧化铝或沸石材料。 原料可以表征为具有小于约50wppm氮; 大于约13重量% %氢; 小于约7.5重量% %2 +环芳烃芯; 并且不超过约15wt。 %芳香核心总体。

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