Process for the production of triethylenediamine
    4.
    发明授权
    Process for the production of triethylenediamine 失效
    三亚乙基二胺生产工艺

    公开(公告)号:US5756741A

    公开(公告)日:1998-05-26

    申请号:US751142

    申请日:1996-11-15

    CPC分类号: C07D487/08

    摘要: A process for preparing triethylenediamine by passing an amine compound over a catalyst at elevated temperature to afford a reaction product containing triethylenediamine and piperazine, the amine compound having, in the molecule, a moiety represented by the following general formula ##STR1## where R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are independently a hydrogen atom or an alkyl group having 1 to 4 carbon atoms and X is oxygen or nitrogen characterized by adding an ethylating compound containing at least one nitrogen and/or oxygen atom to the reaction product and contacting the reaction product, under conditions sufficient to produce triethylenediamine from the ethylating compound and piperazine, with a condensation/cyclization shape-selective zeolite catalyst demonstrating a triethylenediamine/piperazine weight ratio uptake value of at least 6:1.

    摘要翻译: 一种通过使胺化合物在升高的温度下通过催化剂制备三亚乙基二胺的方法,得到含有三亚乙基二胺和哌嗪的反应产物,所述胺化合物在分子中具有由以下通式表示的部分,其中R1,R2 R 3和R 4独立地是氢原子或具有1至4个碳原子的烷基,X是氧或氮,其特征在于向反应产物中加入含有至少一个氮原子和/或氧原子的乙基化合物,并使反应产物 在足以从乙基化合物和哌嗪产生三亚乙基二胺的条件下,使用缩合/环化形状选择性沸石催化剂,证明三亚乙基二胺/哌嗪的重量比吸收值至少为6:1。

    Production of diisopropylbenzene
    8.
    发明授权
    Production of diisopropylbenzene 有权
    生产二异丙基苯

    公开(公告)号:US06933419B2

    公开(公告)日:2005-08-23

    申请号:US09844051

    申请日:2001-04-27

    摘要: A process for the disproportionation of cumene is disclosed which comprises the step of contacting a feed containing cumene, under disproportionation conditions, with a catalyst comprising a molecular sieve, preferably TEA-mordenite. The contacting step disproportionates at least part of the cumene in the feed to provide a disproportionation effluent containing benzene and a mixture of diisopropylbenzene isomers. The effluent is then recovered and contains, prior to any separation step, less 1% of ortho-diisopropylbenzene by weight of the total diisopropylbenzene content of said effluent, less than 1 wt % of n-propylbenzene, less than 5 wt % of triisopropylbenzenes and less than 5 wt % of disproportionation products other than benzene and diisopropylbenzenes.

    摘要翻译: 公开了异丙苯歧化的方法,其包括在歧化条件下使含有枯烯的进料与包含分子筛,优选TEA丝光沸石的催化剂接触的步骤。 接触步骤歧化进料中的异丙基苯的至少一部分,以提供含有苯和二异丙基苯异构体的混合物的歧化流出物。 然后回收流出物,并且在任何分离步骤之前,包含按所述流出物的总二异丙苯含量的重量计小于1重量%的邻二异丙基苯,小于1重量%的正丙基苯,小于5重量%的三异丙基苯和 除苯和二异丙基苯以外的歧化产物少于5重量%。