Process for the production of cumene
    3.
    发明授权
    Process for the production of cumene 失效
    异丙苯生产工艺

    公开(公告)号:US4343957A

    公开(公告)日:1982-08-10

    申请号:US218333

    申请日:1980-12-19

    IPC分类号: C07C2/70 C07C2/68

    CPC分类号: C07C2/70 C07C2527/173

    摘要: Production of cumene by alkylation of benzene with propylene on a solid phosphoric acid catalyst, using in a first step a plurality of catalyst beds in series and in a second step a single catalyst bed, using an overall benzene/propylene molar ratio of at least 5:1, continuously delivering the benzene to the first bed, continuously delivering a series of streams of liquid propylene respectively to the first bed and, in the form of a cold stream, between each pair of contiguous beds, and carrying out a partial recycle of reaction products of the second step as a cold stream between the first and the second step, and using a benzene/propylene molar ratio higher than 13:1 at the inlet of each bed of the first step, and higher than 25:1 at the inlet of the bed of the second step.

    摘要翻译: 通过在固体磷酸催化剂上用丙烷烷基化苯来生产枯烯,在第一步中使用多个催化剂床串联,在第二步中使用单一催化剂床,使用总苯/丙烯摩尔比为至少5 :1,连续地将苯输送到第一床,连续地将一系列液态丙烯流分别连续地输送到第一床,并以冷流的形式在每对连续的床之间进行,并进行部分循环 在第一步骤和第二步骤之间的第二步骤的反应产物作为冷流,并且在第一步骤的每个床的入口处使用高于13:1的苯/丙烯摩尔比,并且在第 第二步床的入口。

    Process for the production of cumene
    5.
    发明授权
    Process for the production of cumene 失效
    异丙苯生产工艺

    公开(公告)号:US4324941A

    公开(公告)日:1982-04-13

    申请号:US225220

    申请日:1981-01-15

    IPC分类号: C07C2/70 C07C2/68

    CPC分类号: C07C2/70 C07C2527/173

    摘要: Cumene is prepared by alkylation of benzene with propylene in the presence of a solid phosphoric acid catalyst in a continuous process by delivering liquid benzene and liquid propylene in a molar ratio lower than 6:1, to a liquid reaction medium consisting essentially of benzene and cumene and containing the catalyst, while maintaining the temperature and composition of said medium substantially uniform in each point, operating at 170.degree.-280.degree. C. and in the liquid phase, and with a contact time higher than about 0.4 hours, expressed as the ratio between volume of catalyst and hourly volume of reagents fed in.

    摘要翻译: 通过在固体磷酸催化剂存在下,通过将液体苯和低于6:1的摩尔比的液体丙烯输送到基本上由苯和异丙基苯组成的液体反应介质,将苯与丙烯烷基化, 并含有催化剂,同时保持所述介质的温度和组成在每个点上基本上均匀,在170℃-280℃和液相下操作,接触时间高于约0.4小时,以比例 催化剂体积和加入的试剂的小时体积。