Minimizing diphenylethane formation in alkylation of benzene by ethylene
catalyzed by zeolite beta
    51.
    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:US06153806A

    公开(公告)日:2000-11-28

    申请号:US336845

    申请日:1999-06-21

    申请人: Gregory J. Gajda

    发明人: Gregory J. Gajda

    IPC分类号: B01J29/70 C07C2/66

    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 reducing the number of hydride transfer active sites on a zeolite beta. One way of producing this "site-modified" beta is to take a parent or precursor zeolite beta that has at least 0.5% carbon on it and treat it under oxidation conditions at a temperature of about 450.degree. C. to about 750.degree. C. The use of such a catalyst gives a product containing less than 0.3 wt. % 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减少沸石β上的氢化物转移活性位点的数量来实现。 产生这种“位点修饰”β的一种方法是取一种在其上具有至少0.5%碳的母体或前体沸石β,并在氧化条件下在约450℃至约750℃的温度下进行处理。 使用这种催化剂得到含有小于0.3wt。 %1,1-二苯基乙烷相对于乙苯。

    Pentene isomerization process
    54.
    发明授权
    Pentene isomerization process 失效
    戊烯异构化过程

    公开(公告)号:US5367101A

    公开(公告)日:1994-11-22

    申请号:US995455

    申请日:1992-12-22

    摘要: An improved process is disclosed for the isomerization of pentenes in the absence of hydrogen using a catalyst comprising a non-zeolitic molecular sieve. It is of particular interest to increase the proportion of olefins containing tertiary carbons in the product with low formation of undesirable by-products. Product olefins may be further processed to obtain methyl t-amyl ether, which enjoy high current interest as components for reformulated gasoline. Pentenes in raffinate from etherification may be returned to the isomerization process.

    摘要翻译: 公开了使用包含非沸石分子筛的催化剂在不存在氢的情况下使戊烯异构化的改进方法。 特别值得注意的是,产品中含有叔碳的烯烃的比例增加,形成不希望的副产物。 可以进一步处理产物烯烃以获得作为重整汽油的组分享有高电流兴趣的甲基叔戊基醚。 来自醚化的残液中的Pentenes可以返回到异构化过程。