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    • 5. 发明授权
    • Process for improving olefin etherification catalyst life
    • 改进烯烃醚化催化剂寿命的方法
    • US5300126A
    • 1994-04-05
    • US963955
    • 1992-10-19
    • Stephen H. BrownQuang N. LeLawrence B. Alemany
    • Stephen H. BrownQuang N. LeLawrence B. Alemany
    • C07C51/347C07C51/567C10L1/14C10L1/16C10L1/18C10L1/188C10L1/20C10L1/22C10L1/24
    • C10L1/1883C07C51/347C07C51/567C10L1/14C10L1/18C10L1/1608C10L1/1824C10L1/1852C10L1/1857C10L1/1881C10L1/19C10L1/1905C10L1/201C10L1/204C10L1/205C10L1/224C10L1/2286C10L1/231C10L1/2437C10L1/245
    • 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.
    • 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。
    • 6. 发明授权
    • Selective cracking and etherification of olefins
    • 烯烃的选择性裂化和醚化
    • US5264635A
    • 1993-11-23
    • US770215
    • 1991-10-03
    • Quang N. LeRobert T. Thomson
    • Quang N. LeRobert T. Thomson
    • C07C6/04C07C41/06C07C41/00C07C4/06
    • C07C6/04C07C41/06
    • A selective alkene upgrading process wherein a mixture of intermediate molecular weight monoalkenes comprising at least one linear alkene component and at least one tertiary alkene component is contacted under selective olefin interconversion conditions with medium pore, shape selective acid catalyst, such as MCM-22 aluminosilicate zeolite, thereby converting at a major amount of linear intermediate alkene to lower alkene while leaving tertiary alkene substantially unconverted. In the preferred embodiments, the process interconversion conditions comprise reaction temperature in the range of about 300.degree. C. to 550.degree. C., pressure in the range of 100 kpa to 1000 kPa, thereby selectively converting at least 60% (net) of linear intermediate alkene while converting less than 20% (net) of branched alkene. By etherifying at least a portion of the unconverted tertiary alkene, an oxygenated fuel having enhanced octane rating is obtained. Cracked lower olefins may be recovered for upgrading.
    • 选择性烯烃改质方法,其中包含至少一种直链烯烃组分和至少一种叔烯烃组分的中等分子量单烯烃的混合物在选择性烯烃相互转化条件下与中孔,形状选择性酸催化剂如MCM-22铝硅酸盐沸石 ,从而将主要量的线性中间体烯转化为低级烯烃,同时使叔烯烃基本上未转化。 在优选的实施方案中,工艺互转条件包括在约300℃至550℃范围内的反应温度,在100kpa至1000kPa范围内的压力,由此选择性地将至少60%(净)的线性 中间烯烃,同时转化少于20%(净)的支链烯烃。 通过醚化至少一部分未转化的叔烯烃,获得具有增强的辛烷值的含氧燃料。 可以回收裂解的低级烯烃进行升级。