Xylene isomerization
    1.
    发明授权
    Xylene isomerization 失效
    二甲苯异构化

    公开(公告)号:US4236996A

    公开(公告)日:1980-12-02

    申请号:US43395

    申请日:1979-05-25

    IPC分类号: B01J29/40 C07C5/27 C10G35/04

    摘要: Isomerization of xylenes in admixture with ethylbenzene by contact with a zeolite catalyst such as ZSM-5 is improved by use of zeolite which has been steamed at high temperature to reduce activity, the reaction being at a temperature above about 700.degree. F. At these conditions, conversion of ethylbenzene follows a different reaction path which permits high conversion of ethylbenzene to benzene without loss of xylenes of disproportionation.

    摘要翻译: 通过与沸石催化剂如ZSM-5的接触将二甲苯异构化与乙苯混合,通过使用已经在高温下蒸煮以降低活性的沸石,反应在高于约700°F的温度下得到改善。在这些条件下 ,乙苯的转化遵循不同的反应途径,其允许乙苯高效转化为苯而不损失歧化二甲苯。

    Manufacture of benzene, toluene and xylene
    2.
    发明授权
    Manufacture of benzene, toluene and xylene 失效
    制造苯,甲苯和二甲苯

    公开(公告)号:US4211886A

    公开(公告)日:1980-07-08

    申请号:US945279

    申请日:1978-09-25

    摘要: Benzene, toluene and xylene are produced in high yield from aromatic naphtha by a processing technique which combines (1) high temperature isomerization of eight carbon atom aromatics over a catalyst having relatively low activity and constrained access to the internal pore surface and (2) processing of heavy single ring aromatics of nine or more carbon atoms together with toluene under dealkylation/transalkylation conditions. The effluents of the two reactions are blended for processing through separation and recovery equipment. The unique chemistry of the isomerization stage results in splitting off alkyl side chains of two or more carbon atoms while retaining methyl groups attached to aromatic rings. Because of these reaction characteristics, full range reformate is advantageously added to the isomerizer charge for conversion to methyl benzene and redistribution of methyl groups to the thermodynamic equilibrium values.

    摘要翻译: 苯,甲苯和二甲苯通过加工技术以芳族石脑油的高产率生产,其结合(1)八种碳原子芳族化合物在具有较低活性的催化剂上的高温异构化和对内孔表面的限制性通路;(2)加工 9个或更多个碳原子的重单环芳烃与脱甲基烷基转移条件下的甲苯一起。 通过分离和回收设备将两种反应的流出物混合进行处理。 异构化阶段的独特化学反应导致分离出两个或更多个碳原子的烷基侧链,同时保留连接到芳环上的甲基。 由于这些反应特性,有利的是将全范围重整产物加入到异构化装置中以转化成甲基苯并将甲基基团重新分配到热力学平衡值。

    Manufacture of benzene, toluene and xylene
    6.
    发明授权
    Manufacture of benzene, toluene and xylene 失效
    制造苯,甲苯和二甲苯

    公开(公告)号:US4341622A

    公开(公告)日:1982-07-27

    申请号:US212770

    申请日:1980-12-04

    CPC分类号: C10G45/64 C10G2400/30

    摘要: Benzene, toluene and xylenes are prepared from heavy reformate in substantially the proportion in said reformate of single ring aromatic compounds bearing none, one or two methyl groups by contacting said heavy reformate at 800.degree.-1000.degree. F. with a zeolite of low acid activity.

    摘要翻译: 苯,甲苯和二甲苯由重质化合物制成,重量比大约为单环芳族化合物重整油中的一个或两个甲基基团,通过使800-1000°F的重质化合物与低酸活性的沸石接触, 。

    Benzene conversion over ZSM-5
    9.
    发明授权
    Benzene conversion over ZSM-5 失效
    苯转化ZSM-5

    公开(公告)号:US4926000A

    公开(公告)日:1990-05-15

    申请号:US213755

    申请日:1988-06-30

    申请人: Roger A. Morrison

    发明人: Roger A. Morrison

    IPC分类号: C07C2/00

    摘要: Benzene reacts with itself to produce liquid aromatic compounds having more than 6 carbon atoms, in the presence of zeolite characterized as a medium pore size and having an activity defined by an alpha value of at least 50.

    摘要翻译: 在具有中等孔径并且具有由α值至少为50定义的活性的沸石的存在下,苯与其自身反应产生具有多于6个碳原子的液体芳族化合物。