Continuous process for preparing ethylbenzene using liquid phase
alkylation and vapor phase transalkylation
    41.
    发明授权
    Continuous process for preparing ethylbenzene using liquid phase alkylation and vapor phase transalkylation 失效
    使用液相烷基化和气相烷基转移制备乙苯的连续方法

    公开(公告)号:US5600048A

    公开(公告)日:1997-02-04

    申请号:US364145

    申请日:1994-12-27

    摘要: There is provided a process for preparing ethylbenzene using liquid phase alkylation and vapor phase transalkylation. The liquid phase alkylation reaction may be catalyzed by an acidic solid oxide, such as MCM-22, MCM-49 and MCM-56. The vapor phase transalkylation may be catalyzed by a medium-pore size zeolite such as ZSM-5. The process may be run continuously with the continuous introduction of fresh benzene feed containing at least 500 ppm of nonbenzene hydrocarbon impurities. The combined ethylbenzene product of these alkylation and transalkylation reactions has very low levels of impurities including xylene, hydrocarbons having 7 or less carbon atoms and hydrocarbons having 9 or more carbon atoms.

    摘要翻译: 提供了使用液相烷基化和气相烷基转移制备乙苯的方法。 液相烷基化反应可以由酸性固体氧化物如MCM-22,MCM-49和MCM-56催化。 气相烷基转移可以通过中等孔径的沸石催化,例如ZSM-5。 该方法可以连续引入含有至少500ppm非苯烃杂质的新鲜苯进料而连续进行。 这些烷基化和烷基转移反应的组合乙苯产物具有非常低的杂质含量,包括二甲苯,具有7个或更少碳原子的烃和具有9个或更多个碳原子的烃。

    Measurement of ignition characteristics of distillate fuels
    45.
    发明授权
    Measurement of ignition characteristics of distillate fuels 失效
    馏出燃料的点燃特性的测量

    公开(公告)号:US4549815A

    公开(公告)日:1985-10-29

    申请号:US554014

    申请日:1983-11-21

    IPC分类号: G01N25/52 G01N33/28 G01N25/54

    CPC分类号: G01N25/52 G01N33/2829

    摘要: Ignition delay of distillate fuels is measured by heating a block to an elevated temperature and injecting samples into a cavity in the block as it cools. The time between each injection and ignition of the fuel is measured. This measurement of ignition delay is used to determine the cetane number of the distillate fuel.

    摘要翻译: 通过将块加热到升高的温度并将样品注入块中的空腔中来测量馏出燃料的点火延迟。 测量燃料的每次注入和点火之间的时间。 这种点火延迟的测量用于确定馏出燃料的十六烷值。