Method of controlling monoalkyl aromatic process
    24.
    发明授权
    Method of controlling monoalkyl aromatic process 失效
    控制单烷基芳烃工艺的方法

    公开(公告)号:US06872864B2

    公开(公告)日:2005-03-29

    申请号:US10287873

    申请日:2002-11-04

    摘要: A process for the alkylation of aromatics with olefins using a solid catalyst is disclosed, wherein the olefin ratio and/or the maximum olefin concentration in the alkylation catalyst bed is maintained less than an upper limit. Such operation can decrease the catalyst deactivation rate and the formation of diphenylalkanes. This invention is applicable to processes for the production of a wide variety of commercially important alkylated aromatics, including ethylbenzene and cumene.

    摘要翻译: 公开了使用固体催化剂用烯烃烷基化芳族化合物的方法,其中烷基化催化剂床中的烯烃比率和/或最大烯烃浓度保持小于上限。 这种操作可以降低催化剂失活速率和二苯基烷烃的形成。 本发明适用于生产各种商业上重要的烷基化芳族化合物的方法,包括乙苯和枯烯。

    Minimizing diphenylethane formation in alkylation of benzene by ethylene
catalyzed by zeolite beta
    26.
    发明授权
    Minimizing diphenylethane formation in alkylation of benzene by ethylene catalyzed by zeolite beta 失效
    通过沸石β催化乙烯烷基化苯中二苯基乙烷的形成最小化

    公开(公告)号:US5962759A

    公开(公告)日:1999-10-05

    申请号:US841982

    申请日:1997-04-08

    申请人: Gregory J. Gajda

    发明人: Gregory J. Gajda

    IPC分类号: B01J29/70 C07C2/66 C07C2/54

    摘要: Reduction of the amount of 1,1-diphenylethane and heavier polyalkylated benzenes produced in the formation of ethylbenzene by alkylation of benzene with ethylene can be effected by treating a non-templated zeolite beta at thermal oxidation conditions. The precursor zeolite beta contains at least 0.5% carbon which represents a combination of coke and high molecular organic compounds which are not removed by an extended benzene wash at about 200-250.degree. C. The improvement leads to a product containing less than 0.3 weight percent 1,1-diphenylethane relative to ethylbenzene.

    摘要翻译: 通过用乙烯烷基化苯来形成乙苯生成的1,1-二苯基乙烷和较重的多烷基化苯的量可以通过在热氧化条件下处理非模板沸石β来实现。 前体沸石β含有至少0.5%的碳,其表示焦炭和高分子有机化合物的组合,其在约200-250℃下不被延长的苯洗涤剂除去。改进导致含有小于0.3重量%的产物 1,1-二苯基乙烷相对于乙苯。

    Process for the removal of nitrogen compounds from an aromatic stream
    27.
    发明授权
    Process for the removal of nitrogen compounds from an aromatic stream 失效
    从芳香物流中除去氮化合物的方法

    公开(公告)号:US5942650A

    公开(公告)日:1999-08-24

    申请号:US919845

    申请日:1997-08-28

    申请人: Gregory J. Gajda

    发明人: Gregory J. Gajda

    摘要: This invention relates to a catalytic reaction of an aromatic stream wherein a guard bed for the removal of nitrogen compounds from the aromatic hydrocarbon stream comprising the nitrogen compounds is provided to contact the hydrocarbon stream with a selective adsorbent having an average pore size less than about 5.5 Angstroms to produce a treated feedstream essentially free of the nitrogen compound. The selective adsorbent is a molecular sieve selected from the group consisting of pore closed zeolite 4A, zeolite 4A, zeolite 5A, silicalite, F-silicalite, ZSM-5 and mixtures thereof. The invention provides significant cost advantages when the feedstream is subject to slugs or surges in levels of nitrogen compounds which can be detrimental to downstream acid catalysts as found in aromatic conversion reactions.

    摘要翻译: 本发明涉及一种芳族物流的催化反应,其中提供了用于从包含氮化合物的芳族烃物流中除去氮化合物的保护床以使烃流与平均孔径小于约5.5的选择性吸附剂接触 产生基本上不含氮化合物的经处理的原料流的埃。 选择性吸附剂是选自孔封闭沸石4A,沸石4A,沸石5A,硅沸石,F-硅沸石,ZSM-5及其混合物的分子筛。 本发明提供了显着的成本优势,当进料流受到氮化合物水平的lug lug或浪涌时,其可能对芳族转化反应中发现的下游酸催化剂是有害的。

    Isomerization process using modified zeolite Omega
    28.
    发明授权
    Isomerization process using modified zeolite Omega 失效
    异构化方法使用改性沸石欧米加

    公开(公告)号:US5536895A

    公开(公告)日:1996-07-16

    申请号:US349777

    申请日:1994-12-06

    摘要: Forms of zeolite Omega synthesized by hydrothermal crystallization from reaction systems containing alkali metal cations and organic templating agents, modified by calcination in air, ion-exchange, steam calcination and treatment with a low-pH aqueous ammonium ion solution, are significantly improved with respect to surface area, catalytic activity and adsorption capacities for large molecular species. A catalyst comprising zeolite Omega is effective for isomerization of aromatics and aliphatics.

    摘要翻译: 通过由含有碱金属阳离子和有机模板剂的反应体系通过水热结晶合成的沸石的形式,通过在空气中煅烧,离子交换,蒸汽煅烧和用低pH水溶液的铵离子溶液处理而被改进,相对于 表面积,催化活性和大分子物种的吸附能力。 包含沸石欧米茄的催化剂对芳族化合物和脂肪族异构化是有效的。