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    Treatment of waste water from the preparation of 6-substituted 3-mercapto-4-amino-1,2,4-triazine-5-ones
    1.
    发明授权
    Treatment of waste water from the preparation of 6-substituted 3-mercapto-4-amino-1,2,4-triazine-5-ones 失效
    从6-取代的3-巯基-4-氨基-1,2,4-三嗪-5-酮的制备中处理废水

    公开(公告)号：US4058526A

    公开(公告)日：1977-11-15

    申请号：US685234

    申请日：1976-05-11

    申请人： Walter Merz ,  Gunter Schummer

    发明人： Walter Merz ,  Gunter Schummer

    IPC分类号： C07D253/075 ,  C07D253/06

    CPC分类号： C07D253/075

    摘要： A process for the treatment of waste water obtained in the condensation of thiocarbohydrazide and an aqueous solution of an .alpha.-keto carboxylic acid such as, e.g., 3,3-dimethyl-2-oxo-butyric acid, which comprises mixing said waste water with a water-immiscible ketone, preferably selected from the group consisting of methyl isobutyl ketone, cyclohexanone and pinacolone, said ketone being employed in an amount sufficient to form two phases, separating said two phases, and discharging as waste the aqueous phase. Advantageously the pH of the waste water is no higher than about 6 and its temperature is 20.degree. to 50.degree. C. The organic phase comprises the ketone containing dissolved therein an adduct of the ketone with thiocarbohydrazide and/or similar amino materials originally present in waste water. The excess of the ketone may be recovered from the organic phase by distillation, or the organic phase may be treated with alkali to effect hydrolysis of such adducts, the ketone separated and recycled and the amino materials recovered.

    摘要翻译： 一种用于处理硫代碳酰肼的缩合得到的废水和α-酮羧酸（例如3,3-二甲基-2-氧代 - 丁酸）的水溶液的方法，其包括将所述废水与 优选选自甲基异丁基酮，环己酮和频哪酮的水不混溶性酮，所述酮的用量足以形成两相，分离所述两相，并以废水的形式排出水相。 有利地，废水的pH不高于约6℃，其温度为20℃至50℃。有机相包含其中溶解有酮与硫代碳酰肼和/或最初存在于废物中的类似氨基物质的加合物的酮 水。 可以通过蒸馏从有机相中回收过量的酮，或者可以用碱处理有机相以进行这种加合物的水解，将酮分离并再循环并回收氨基物质。

    Process for the isolation of pyrocatechol and hydroquinone
    2.
    发明授权
    Process for the isolation of pyrocatechol and hydroquinone 失效
    分离焦儿茶酚和氢醌的方法

    公开(公告)号：US4308112A

    公开(公告)日：1981-12-29

    申请号：US166270

    申请日：1980-07-02

    申请人： Christoph Jupe ,  Jurgen Baumert ,  Gunter Schummer

    发明人： Christoph Jupe ,  Jurgen Baumert ,  Gunter Schummer

    IPC分类号： C07C27/00 ,  C07C37/74 ,  C07C39/08 ,  C07C67/00 ,  B01D3/10

    CPC分类号： C07C37/74 ,  C07C37/685

    摘要： A process is described for the isolation of pyrocatechol and hydroquinone from mixtures containing the same, and phenol and higher boiling accompanying substances. The mixture can be one obtained by reacting phenol with a peroxidic hydroxylating agent and removing some of the phenol and the substances which have a lower boiling point than phenol. The mixture is subjected to a first rectification in which phenol and substances which have a boiling point between phenol and pyrocatechol are obtained overhead to leave behind a bottom product containing pyrocatechol and hydroquinone. The bottom product is subjected to a second rectification in which the pyrocatechol is obtained overhead to leave behind a bottom product containing hydroquinone and higher boiling accompanying substances. This bottom product is fed to a concentrating unit in which hydroquinone is evaporated overhead to leave behind high boiling accompanying substances as residue.

    摘要翻译： 描述了从含有它们的混合物和苯酚和较高沸点的伴随物质中分离焦儿茶酚和氢醌的方法。 该混合物可以是通过使苯酚与过氧化羟基化剂反应并除去一些苯酚和沸点低于苯酚的物质而获得的。 将混合物进行第一次精馏，其中在塔顶馏出苯酚和酚与邻苯二酚之间的沸点的物质，留下含有邻苯二酚和氢醌的底部产物。 对底部产物进行第二次精馏，其中邻苯二酚在塔顶馏出物后面留下含有氢醌和较高沸点伴随物质的底部产物。 将该底部产物进料到浓缩单元中，其中氢醌在塔顶蒸发，留下高沸点伴随物质作为残留物。