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    Recovery of chlorine and cyanuric acid values from polychloroisocyanuric acid and salts thereof
    1.
    发明授权
    Recovery of chlorine and cyanuric acid values from polychloroisocyanuric acid and salts thereof 失效
    从聚氯乙烯酸及其盐中回收氯和氰基酸值

    公开(公告)号：US3835136A

    公开(公告)日：1974-09-10

    申请号：US36269473

    申请日：1973-05-22

    Applicant: OLIN CORP

    Inventor： HIRDLER L ,  SCHIESSL H ,  DOONAN D

    IPC: C07D251/36 ,  C07D55/36

    CPC classification number: C07D251/36

    Abstract: A process is described for recovering chlorine and cyanuric acid values from aqueous solutions containing a chlorinated s-triazine compound selected from the group consisting of polychloroisocyanuric acids, alkali metal salts thereof and mixtures thereof. The aqueous solution of chlorinated s-triazine compound is reacted with a mineral acid to form chlorine and cyanuric acid. An inert gas is preferably passed simultaneously through the aqueous solution to remove chlorine as it forms. The chlorine-depleted aqueous slurry containing solid cyanuric acid is separated, for example, by filtration to recover cyanuric acid. The resulting solids-free mother liquor, which contains some dissolved cyanuric acid is contacted with an adsorbent, such as activated carbon, which adsorbs the cyanuric acid from the liquid. The liquid, substantially free of chlorine and cyanuric acid values, is conveyed to waste. Cyanuric acid adhering to the adsorbent is removed from the adsorbent with an alkali metal hydroxide or carbonate solution. Recovered cyanuric acid values may be used in the preparation of additional polychloroisocyanuric acid or alkali metal salts thereof.

    Abstract translation: 描述了从含有选自多氯异氰尿酸，其碱金属盐及其混合物的氯化的三嗪化合物的水溶液中回收氯和氰尿酸值的方法。 氯化三嗪化合物的水溶液与无机酸反应形成氯和三聚氰酸。 惰性气体优选同时通过水溶液以除去其形成的氯气。 含有固体氰尿酸的含氯贫含水浆料例如通过过滤分离以回收氰尿酸。

    Polychloroisocyanuric acids prepared from a monoalkali metal cyanurate
    2.
    发明授权
    Polychloroisocyanuric acids prepared from a monoalkali metal cyanurate 失效
    由单一烷基金属氰化物制备的聚氯氰酸

    公开(公告)号：US3835134A

    公开(公告)日：1974-09-10

    申请号：US35309773

    申请日：1973-04-20

    Applicant: OLIN CORP

    Inventor： SCHIESSL H ,  SAWHILL D ,  BHUTANI S

    IPC: C07D251/36 ,  C07D55/42

    CPC classification number: C07D251/36

    Abstract: Polychloroisocyanuric acids are produced by the reaction of monoalkali metal cyanurate with hypochlorous acid and a chlorinecontaining compound selected from the group consisting of chlorine and chlorine octahydrate where the molar ratio of chlorine-containing compound to monoalkali metal cyanurate is at least 1:1. Where an excess of chlorine-containing compound is used, this excess is employed to remove any gaseous by-products such as nitrogen trichloride, which may be formed during the reaction. This excess containing gaseous by-products is reacted with an alkali metal compound to convert the chlorine present to an alkali metal hypochlorite, which is further reaction to form hypochlorous acid. The hypochlorous acid can be used in the chlorination reaction. Reaction conditions include a temperature range of from -5* to 45*C. and a pH of 3 to 4.5.

    Abstract translation: 多氯异氰脲酸是通过单碱金属氰脲酸酯与次氯酸和选自氯和氯八水合物的含氯化合物反应制备的，其中含氯化合物与单碱金属氰尿酸酯的摩尔比至少为1:1。 当使用过量的含氯化合物时，该过量用于除去可能在反应期间形成的任何气态副产物如三氯化氮。 含有气态副产物的过量与碱金属化合物反应，将存在的氯转化为碱金属次氯酸盐，进一步反应形成次氯酸。 次氯酸可用于氯化反应。 反应条件包括-5至45℃的温度范围和3至4.5的pH。

    Recovery of chlorine and cyanuric acid values from polychloroisocyanuric acid and salts thereof
    3.
    发明授权
    Recovery of chlorine and cyanuric acid values from polychloroisocyanuric acid and salts thereof 失效
    从聚氯乙烯酸及其盐中回收氯和氰基酸值

    公开(公告)号：US3846424A

    公开(公告)日：1974-11-05

    申请号：US36269573

    申请日：1973-05-22

    Applicant: OLIN CORP

    Inventor： DOONAN D ,  HIRDLER L ,  SCHIESSL H

    IPC: C01B7/00 ,  C01B7/01 ,  C07D251/32 ,  C07D55/36

    CPC classification number: C07D251/32 ,  C01B7/01

    Abstract: A process is described for recovering chlorine and cyanuric acid values from aqueous solutions containing a chlorinated s-triazine compound selected from the group consisting of polychloroisocyanuric acids, alkali metal salts thereof and mixtures thereof. The aqueous solution of chlorinated s-triazine compound is reacted with a mineral acid to form chlorine and cyanuric acid. An inert gas is preferably passed simultaneously through the aqueous solution to remove chlorine as it forms. The chlorine-depleted aqueous slurry containing solid cyanuric acid is reacted in a neutralization step with an alkali metal compound to precipitate an alkali metal cyanurate, which is separated, for example, by filtration. The solid alkali metal cyanurate may be used in the preparation of additional polychloroisocyanuric acid or alkali metal salt thereof. The resulting solids-free liquid, which contains some dissolved alkali metal cyanurate is contacted with an adsorbent, such as activated carbon, which adsorbs the cyanurate from the liquid, and the resulting liquid, substantially free of chlorine and cyanuric acid values, is conveyed to waste. Alkali metal cyanurate adhering to the adsorbent is removed from the adsorbent with an alkali metal hydroxide or carbonate solution and recycled to the neutralization step.

    Abstract translation: 描述了从含有选自多氯异氰尿酸，其碱金属盐及其混合物的氯化的三嗪化合物的水溶液中回收氯和氰尿酸值的方法。 氯化三嗪化合物的水溶液与无机酸反应形成氯和三聚氰酸。 惰性气体优选同时通过水溶液以除去其形成的氯气。 含有固体氰尿酸的含氯贫含水浆料在中和步骤中与碱金属化合物反应以沉淀碱金属氰脲酸盐，其通过过滤分离。 固体碱金属氰尿酸盐可用于制备额外的多氯异氰脲酸或其碱金属盐。

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