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106 条记录 (耗时 0.07 秒)

    Process for improving olefin etherification catalyst life
    81.
    发明授权
    Process for improving olefin etherification catalyst life 失效
    改进烯烃醚化催化剂寿命的方法

    公开(公告)号：US5300126A

    公开(公告)日：1994-04-05

    申请号：US963955

    申请日：1992-10-19

    申请人： Stephen H. Brown ,  Quang N. Le ,  Lawrence B. Alemany

    发明人： Stephen H. Brown ,  Quang N. Le ,  Lawrence B. Alemany

    IPC分类号： C07C51/347 ,  C07C51/567 ,  C10L1/14 ,  C10L1/16 ,  C10L1/18 ,  C10L1/188 ,  C10L1/20 ,  C10L1/22 ,  C10L1/24

    CPC分类号： C10L1/1883 ,  C07C51/347 ,  C07C51/567 ,  C10L1/14 ,  C10L1/18 ,  C10L1/1608 ,  C10L1/1824 ,  C10L1/1852 ,  C10L1/1857 ,  C10L1/1881 ,  C10L1/19 ,  C10L1/1905 ,  C10L1/201 ,  C10L1/204 ,  C10L1/205 ,  C10L1/224 ,  C10L1/2286 ,  C10L1/231 ,  C10L1/2437 ,  C10L1/245

    摘要： A method is disclosed for the pretreatment of olefinic hydrocarbon feedstock to remove conjugated dienes and/or basic nitrogen compounds that deactivate acidic catalyst particles used in olefin conversion processes by reacting the dienes with one or more dienophiles to form the corresponding Diels-Alder adduct, followed by catalytic conversion of the olefinic hydrocarbon feedstock containing the adduct. The formation of the Diels-Alder adduct essentially eliminates the role of dienes in the feedstock as catalyst deactivating agents. When maleic anhydride (MA) is employed as the dienophile, basic nitrogen reacts with maleic anhydride, or with the tetrahydrophthalic anhydride adduct, to lower the amount of catalyst deactivating basic nitrogen compounds in the feedstock. Where the olefin conversion process comprises etherification of isoolefins with alkanol in a C.sub.4 + or C.sub.5 + olefinic hydrocarbon feedstream to produce a gasoline boiling range product enriched in oxygen and rich in high octane value alkyl tertiary alkyl ethers, it has been discovered that the adduct, particularly those adducts formed with MA, is in the gasoline boiling range and contributes usefully to the oxygen enrichment of the gasoline and to octane value.

    摘要翻译： 公开了一种用于预处理烯烃原料以除去共轭二烯和/或碱性氮化合物的方法，其通过使二烯与一种或多种亲双烯体反应形成相应的狄尔斯 - 阿尔德加合物，使烯烃转化过程中使用的酸性催化剂颗粒失活，随后 通过催化转化含有加合物的烯烃原料。 Diels-Alder加合物的形成基本上消除了二烯在原料中作为催化剂失活剂的作用。 当使用马来酸酐（MA）作为亲二烯体时，碱性氮与马来酸酐或四氢邻苯二甲酸酐加合物反应，以降低原料中催化剂失活碱性氮化合物的量。 当烯烃转化方法包括在C4 +或C5 +烯烃原料流中异构烯烃与烷醇的醚化以产生富含氧并富含高辛烷值烷基叔烷基醚的汽油沸程产物时，已经发现加合物，特别是那些 与MA形成的加合物处于汽油沸点范围内，有助于汽油的富氧和辛烷值。

    Removal of bromine index contaminants from aromatic streams
    83.
    发明授权
    Removal of bromine index contaminants from aromatic streams 失效
    从芳香流中去除溴指数污染物

    公开(公告)号：US08216450B2

    公开(公告)日：2012-07-10

    申请号：US12758388

    申请日：2010-04-12

    申请人： Stephen H. Brown

    发明人： Stephen H. Brown

    IPC分类号： C07C5/08

    CPC分类号： C07C7/163 ,  C07C15/02 ,  C07C15/04

    摘要： According to the invention, trace olefins and dienes are removed from aromatic plant feedstocks by contacting the catalyst using conditions outside the ordinary range used for this application today.

    摘要翻译： 根据本发明，通过使用本申请使用的普通范围之外的条件使催化剂与芳族植物原料一起除去痕量烯烃和二烯。

    Method of high pressure and high capacity oxygenate conversion with catalyst exposure cycle
    90.
    发明申请
    Method of high pressure and high capacity oxygenate conversion with catalyst exposure cycle 有权
    用催化剂曝光循环的高压和高容量含氧化合物转化方法

    公开(公告)号：US20070232844A1

    公开(公告)日：2007-10-04

    申请号：US11698511

    申请日：2007-01-26

    申请人： Keith H. Kuechler ,  James H. Beech ,  Doron Levin ,  Stephen N. Vaughn ,  Stephen H. Brown

    发明人： Keith H. Kuechler ,  James H. Beech ,  Doron Levin ,  Stephen N. Vaughn ,  Stephen H. Brown

    IPC分类号： C07C1/00

    CPC分类号： C07C1/20 ,  B01J29/90 ,  B01J38/06 ,  C07C2529/85 ,  C08F10/00 ,  C10G3/49 ,  C10G3/57 ,  C10G3/62 ,  C10G2300/308 ,  C10G2300/4012 ,  C10G2300/4018 ,  C10G2300/802 ,  C10G2300/805 ,  C10G2400/20 ,  Y02P20/584 ,  Y02P30/20 ,  Y02P30/42 ,  C07C11/02 ,  C08F2/00

    摘要： A gas-solids reaction system is provided for improving product recovery in a multiple reactor reaction system. An oxygenate feedstock, desirably of high concentration in oxygenate, is reacted with a catalyst having a low to modest acidity and a Si/Al2 ratio of from 0.10 to 0.32. The reaction occurs in a reaction zone of a fluidized bed reactor at an oxygenate partial pressure of at least 45 psia and a reactor gas superficial velocity of at least 10 ft/s, conveying catalyst through the reaction zone to a circulation zone. The catalyst undergoes displacement with an inert gas in the circulation zone at a displacement gas superficial velocity of at least 0.03 m/s, after which at least a portion, preferably a large portion is returned to the reaction zone. The catalyst has a residence time in the circulation zone of at least twice that of the residence time of catalyst in the reaction zone. Extraordinary catalyst activity at high olefin selectivity results despite insignificant changes in coke on catalyst and coke yield when compared to lower pressure operations.

    摘要翻译： 提供了一种气体 - 固体反应系统，用于改善多反应器反应体系中的产物回收。 含氧化合物的含氧化合物原料，优选在含氧化合物中的高浓度与具有低至适度酸度和0.10 / 0.32的Si / Al 2 O比的催化剂反应。 反应在流化床反应器的反应区中发生，氧化分压至少为45psia，反应器气体表观速度为至少10ft / s，将催化剂通过反应区输送到循环区。 催化剂在循环区中以惰性气体置换，位移气体空速为至少0.03m / s，此后至少一部分，优选大部分返回到反应区。 催化剂在循环区中的停留时间至少是催化剂在反应区中的停留时间的两倍。 尽管与较低压力操作相比，尽管催化剂上的焦炭和焦炭产率都没有显着变化，但是在高烯烃选择性方面具有特殊的催化剂活性。