Process for producing phenol and methyl ethyl ketone
    44.
    发明授权
    Process for producing phenol and methyl ethyl ketone 失效
    苯酚和甲基乙基酮的制备方法

    公开(公告)号:US07834218B2

    公开(公告)日:2010-11-16

    申请号:US12162970

    申请日:2007-02-08

    IPC分类号: C07C45/53 C07C37/08

    摘要: A process for producing phenol and methyl ethyl ketone comprises contacting benzene and a C4 alkylating agent under alkylation conditions and in the presence of an alkylation catalyst comprising at least one molecular sieve of the MCM-22 family to produce an alkylation effluent comprising secbutylbenzene; wherein the contacting is conducted in a plurality of reaction zones and the C4 alkylating agent secbutylbenzene fraction is recovered from the alkylation effluent and comprises at least 95 wt % sec-butylbenzene, less than 100 wt ppm of C8+ olefins, and less than 0.5 wt % of isobutylbenzene and tert-butylbenzene. The sec-butylbenzene fraction is then oxidized to produce sec-butylbenzene hydroperoxide and the hydroperoxide is cleaved to produce phenol and methyl ethyl ketene.

    摘要翻译: 一种生产苯酚和甲基乙基酮的方法包括在烷基化条件下和在包含至少一种MCM-22族分子筛的烷基化催化剂的存在下使苯和C4烷基化剂接触以产生包含二丁基苯的烷基化流出物; 其中所述接触在多个反应区中进行,并且所述C4烷基化剂仲丁苯部分从烷基化流出物中回收,并且包含至少95重量%的仲丁基苯,小于100重量ppm的C 8+烯烃和小于0.5重量% 的异丁基苯和叔丁基苯。 然后将仲丁基馏分氧化以产生仲丁基苯氢过氧化物,并将氢过氧化物裂解以产生苯酚和甲基乙基乙烯酮。

    Containment of heavy vapor clouds and aerosols
    49.
    发明授权
    Containment of heavy vapor clouds and aerosols 失效
    遏制重蒸汽云和气溶胶

    公开(公告)号:US5465536A

    公开(公告)日:1995-11-14

    申请号:US187936

    申请日:1994-01-27

    摘要: A system for containment of heavy vapor cloud and aerosol from a potential source of hazardous vapor comprising walled surfaces surrounding the vapor source and a roof above the vapor source and forming with the walled surfaces an enclosure for the vapor source. The roof is porous with openings therethrough dimensioned for minimizing wind shear and extending over at least about 20% of the surface area of the roof, and a device is located within the enclosure for absorbing the vapor.

    摘要翻译: 一种用于从潜在的危险蒸气源容纳重蒸汽云和气溶胶的系统,包括围绕蒸气源的壁表面和蒸气源上方的屋顶,并与壁表面形成蒸汽源的外壳。 屋顶是多孔的,具有穿过其中的开口,其尺寸用于使风切变最小化并且延伸至屋顶的至少约20%的表面积,并且装置位于外壳内以吸收蒸气。