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1. 发明授权

US5300126A Process for improving olefin etherification catalyst life 失效
标题翻译：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。

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