Process for the separation of ortho-nitrotoluene
    52.
    发明授权
    Process for the separation of ortho-nitrotoluene 失效
    邻硝基甲苯分离方法

    公开(公告)号:US4620047A

    公开(公告)日:1986-10-28

    申请号:US661860

    申请日:1984-10-18

    CPC classification number: C07C201/16

    Abstract: An adsorptive separation process for separating ortho-nitrotoluene from a feed mixture comprising the ortho-isomer and at least one other isomer of nitrotoluene. The process comprises contacting the feed mixture with an adsorbent comprising a type X zeolite, containing at the exchangeable cationic sites cations of metals from Group IA or IIA of the Periodic Table of Elements, selectively adsorbing substantially all of the ortho-nitrotoluene to the substantial exclusion of the remaining isomers, removing the non-adsorbed portion of the feed mixture from contact with the adsorbent, and thereafter recovering high-purity ortho-isomer by desorption with nitrobenzene.

    Abstract translation: 用于从包含邻位异构体和至少一种其它异构体的硝基甲苯的进料混合物中分离邻硝基甲苯的吸附分离方法。 该方法包括使进料混合物与包含X型沸石的吸附剂接触,所述吸附剂在可交换的阳离子位置含有来自元素周期表的IA或IIA族金属的阳离子,选择性吸附基本上所有的邻硝基甲苯至实质排除 的剩余异构体,将进料混合物的未吸附部分与吸附剂接触,然后通过用硝基苯解吸回收高纯度邻位异构体。

    Process for the preparation of cinnamic acids which are optionally
substituted in the nucleus
    55.
    发明授权
    Process for the preparation of cinnamic acids which are optionally substituted in the nucleus 失效
    在核中任选取代的肉桂酸的制备方法

    公开(公告)号:US4613692A

    公开(公告)日:1986-09-23

    申请号:US743254

    申请日:1985-06-11

    CPC classification number: C07C51/353

    Abstract: A process for the preparation of cinnamic acid is provided by the present invention in which an optionally substituted benzaldehyde and alkali metal salt of carboxylic acid and/or alkali metal (bi) carbonate, as condensing agents, are heated up to a temperature of 100.degree.-220.degree. C. and thereafter there is introduced into the so heated mixture acetic anhydride in at least a stoichiometric amount based upon the amount of optionally substituted benzaldehyde employed. The process can be carried out by heating up a reaction mixture to 100.degree.-220.degree. C. which is free of acetic anhydride or one which contains acetic anhydride but less than a stoichiometric amount thereof based upon the amount of optionally substituted benzaldehyde.

    Abstract translation: 通过本发明提供了制备肉桂酸的方法,其中将任选取代的苯甲醛和羧酸和/或碱金属(bi)碳酸盐的碱金属盐作为缩合剂加热至100℃ -220℃,然后基于所使用的任选取代的苯甲醛的量,以至少化学计量的量将如此加热的混合物乙酸酐引入。 该方法可以通过将反应混合物加热至不含乙酸酐的100℃-220℃或基于任选取代的苯甲醛的量而含有乙酸酐但少于其化学计量的反应混合物进行。

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