Pentene isomerization process
    2.
    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。

    Pretreatment method for C.sub.8 aromatic isomerization process
    3.
    发明授权
    Pretreatment method for C.sub.8 aromatic isomerization process 失效
    C8芳族异构化方法的预处理方法

    公开(公告)号:US5321184A

    公开(公告)日:1994-06-14

    申请号:US997831

    申请日:1992-12-29

    IPC分类号: C07C5/27 C07C5/22

    CPC分类号: C07C5/2702 C07C5/2724

    摘要: A pretreatment method for a C.sub.8 aromatic isomerization process wherein the isomerization catalyst is initially contacted with a C.sub.8 aromatic feedstock under high severity isomerization conditions for a period of time sufficient to deposit a substantial amount to carbonaceous material on the catalyst. After pretreatment, the carbon-laden catalyst continues to be contacted by the C.sub.8 aromatic feedstock under less severe conditions than that of the pretreatment mode of operation.

    摘要翻译: 用于C8芳族异构化方法的预处理方法,其中异构化催化剂最初在高严重度异构化条件下与C8芳族原料接触一段足以在催化剂上沉积大量碳质材料的时间。 在预处理之后,碳载体催化剂在比预处理操作模式更恶劣的条件下继续与C8芳族原料接触。

    Selective upgrading of naphtha fractions by a combination of reforming
and selective isoparaffin synthesis
    4.
    发明授权
    Selective upgrading of naphtha fractions by a combination of reforming and selective isoparaffin synthesis 失效
    通过重组和选择性异链烷烃合成的组合选择性提升石脑油馏分

    公开(公告)号:US5242576A

    公开(公告)日:1993-09-07

    申请号:US795573

    申请日:1991-11-21

    IPC分类号: C10G59/06

    CPC分类号: C10G59/06

    摘要: A process combination is disclosed to selectively upgrade naphtha to obtain gasoline which is in accordance with current standards for reformulated fuels. A naphtha feedstock is fractionated to selectively direct light naphtha to isomerization or blending, a heart-cut fraction to reforming, and a heavy portion to selective isoparaffin synthesis to yield light and heavy synthesis naphtha and isobutane. The heavy portion of the synthesis naphtha is processed by reforming. Light naphtha may be isomerized, with or without recycle of low-octane components of the product. A gasoline component is blended from light, synthesis, and reformate products from the process combination.

    摘要翻译: 公开了一种方法组合以选择性地升级石脑油以获得符合目前重新配制的燃料标准的汽油。 分馏石脑油原料以选择性地将轻质石脑油引导至异构化或共混,心切成分转化为重馏分,并将重质部分引导至选择性异链烷烃合成以产生轻质和重质合成石脑油和异丁烷。 合成石脑油的重质部分通过重整进行处理。 轻石脑油可以异构化,有或没有产物的低辛烷值组分的再循环。 来自工艺组合的轻质,合成和重整产物的汽油组分混合。

    Catalyst for isomerizing alkylaromatics
    5.
    发明授权
    Catalyst for isomerizing alkylaromatics 失效
    烷基芳族异构化催化剂

    公开(公告)号:US4957891A

    公开(公告)日:1990-09-18

    申请号:US448445

    申请日:1989-12-11

    IPC分类号: C07C5/27

    CPC分类号: C07C5/2724

    摘要: This invention presents a novel catalyst formulation for the isomerization of alkylaromatic hydrocarbons. The catalyst comprises at least one Group VIII metal, a pentasil zeolite wherein a portion of the aluminum atom has been replaced with gallium atoms and a matrix material of zirconia-alumina. When utilized in a process for isomerizing a non-equilibrium mixture of xylenes containing ethylbenzene, a greater yield of para-xylene is obtained compared to prior art processes.

    摘要翻译: 本发明提出了用于烷基芳族烃异构化的新型催化剂配方。 该催化剂包含至少一种Ⅷ族金属,其中一部分铝原子被镓原子取代的五硅烷沸石和氧化锆 - 氧化铝的基质材料。 当用于异构化含有乙苯的二甲苯的非平衡混合物的方法中时,与现有技术方法相比,获得了更高的对二甲苯的产率。

    Method for obtaining improved catalyst systems
    7.
    发明授权
    Method for obtaining improved catalyst systems 失效
    获得改进的催化剂体系的方法

    公开(公告)号:US4464480A

    公开(公告)日:1984-08-07

    申请号:US498625

    申请日:1983-05-27

    CPC分类号: B01J37/0203 B01J23/78

    摘要: Improved catalyst systems which may be used for a wide variety of chemical reactions such as gas conversion reactions may be prepared by impregnating a transition metal compound which may contain a structural promoter with a nonaqueous solution of an alkali metal superhydride in order to provide a more uniform distribution of the chemical promoter on the active surface of the catalyst. As an example, iron oxide which has been structurally promoted with aluminum may be impregnated with a nonaqueous solution of potassium triethyl-borohydride to prepare an active gas conversion catalyst.

    摘要翻译: 可用于各种化学反应如气体转化反应的改进的催化剂体系可以通过用含有碱金属超级氢氧化物的非水溶液浸渍可含有结构促进剂的过渡金属化合物来制备,以提供更均匀的 化学助催化剂在催化剂活性表面上的分布。 例如,用铝结构促进的氧化铁可以用三乙基硼氢化钾的非水溶液浸渍以制备活性气体转化催化剂。

    Catalyst for isomerizing alkylaromatics
    8.
    发明授权
    Catalyst for isomerizing alkylaromatics 失效
    烷基芳族异构化催化剂

    公开(公告)号:US4962259A

    公开(公告)日:1990-10-09

    申请号:US447274

    申请日:1989-12-07

    IPC分类号: C07C5/27

    CPC分类号: C07C5/2724

    摘要: This invention presents a novel catalyst formulation for the isomerization of alkylaromatic hydrocarbons. The catalyst is comprised of at least one Group VIII metal, and a pentasil zeolite having an x-ray diffraction characteristic of ZSM-12 wherein a portion of the aluminum atoms have been replaced with gallium atoms. When utilized in a process for isomerizing a non-equilibrium mixture of xylenes containing ethylbenzene, a greater yield of paraxylene is obtained compared to prior-art processes.

    摘要翻译: 本发明提出了用于烷基芳族烃异构化的新型催化剂配方。 催化剂由至少一种VIII族金属和具有ZSM-12的X射线衍射特性的pentasil沸石组成,其中一部分铝原子被镓原子代替。 当用于异构化含有乙苯的二甲苯的非平衡混合物的方法中时,与现有技术方法相比,获得更高的对二甲苯收率。