Process for the recovery of fluorine from an aqueous solution
    71.
    发明授权
    Process for the recovery of fluorine from an aqueous solution 失效
    从水溶液中回收氟的方法

    公开(公告)号:US4006214A

    公开(公告)日:1977-02-01

    申请号:US401216

    申请日:1973-09-27

    CPC classification number: B01J39/043

    Abstract: A process for the treatment of aqueous solutions containing cations and anions, including aluminum sulphate and fluoride ions, for the recovery of the fluorine contained in the aqueous solution by means of an ion exchange plant, in which the aqueous solution flows through at least a strong acid cation-exchanger filter step, then a first weak basic anion-exchanger filter step which produces an almost complete separation of the sulphate ions, and after that a second weak basic anion-exchanger filter step which separates out the fluorine ions, and the fluoride is recovered from an eluate obtained during regeneration of the second anion-exchanger filter step.

    Abstract translation: 一种处理包含阳离子和阴离子(包括硫酸铝和氟离子)的水溶液的方法,用于通过离子交换设备回收水溶液中所含的氟,其中水溶液至少流过强的 酸性阳离子交换过滤器步骤,然后产生硫酸根离子几乎完全分离的第一弱碱性阴离子交换过滤器,之后分离出氟离子的第二弱碱性阴离子交换过滤器步骤和氟离子 从在第二阴离子交换过滤器步骤的再生期间获得的洗脱液回收。

    WATER TREATMENT
    75.
    发明申请
    WATER TREATMENT 有权
    水处理

    公开(公告)号:US20140186242A1

    公开(公告)日:2014-07-03

    申请号:US13876445

    申请日:2011-09-28

    Abstract: The invention provides a method of reducing the sodium content of a water containing dissolved sodium ions, particularly a water with a sodium ion content of at least 100 ppm. Examples of such waters are effluents such as acid mine drainage and river waters. The method includes the steps of: (i) removing sodium, calcium and magnesium ions from the water by contacting the water with a cation exchange resin/s to capture sodium, calcium and magnesium ions thereon, (ii) treating the cation exchange resin/s of step (i) with nitric acid to produce an eluant containing sodium ions, calcium ions, magnesium ions nitrate ions and nitric acid, (iii) adding a carbonate to the eluant to precipitate the calcium and magnesium ions as calcium and magnesium carbonates; (iv) separating the precipitated carbonates from the eluant; and (v) treating the eluant from step (iv) to obtain a sodium and/or potassium nitrate product.

    Abstract translation: 本发明提供一种降低含有溶解的钠离子,特别是钠离子含量至少为100ppm的水的钠的钠含量的方法。 这种水域的例子是排水,如酸性矿井排水和河水。 该方法包括以下步骤:(i)通过使水与阳离子交换树脂接触来从水中除去钠,钙和镁离子,以在其上捕获钠,钙和镁离子,(ii)将阳离子交换树脂/ 步骤(i)用硝酸生成含有钠离子,钙离子,镁离子硝酸根离子和硝酸的洗脱剂,(iii)向洗脱剂中加入碳酸盐以使钙和镁离子作为碳酸钙和镁酸盐沉淀; (iv)将沉淀的碳酸盐与洗脱液分离; 和(v)处理来自步骤(iv)的洗脱液以获得硝酸钠和/或硝酸钾产物。

    Method for preparing high-purity aqueous hydrogen peroxide
    77.
    发明授权
    Method for preparing high-purity aqueous hydrogen peroxide 失效
    高纯度过氧化氢水溶液的制备方法

    公开(公告)号:US06013237A

    公开(公告)日:2000-01-11

    申请号:US35265

    申请日:1998-03-05

    CPC classification number: C01B15/0135 B01J39/043 B01J41/043

    Abstract: There is herein disclosed a method for preparing high-purity aqueous hydrogen peroxide by bringing aqueous hydrogen peroxide into contact with a strongly basic anion exchange resin, said method comprising the step of using the strongly basic anion exchange resin which is converted into a form of an exchange group at the time of the purification of aqueous hydrogen peroxide by bringing the strongly basic anion exchange resin into contact with a liquid agent passed through a filter having an average pore diameter of 1.0 .mu.m or less.According to the present invention, aqueous hydrogen peroxide containing inorganic impurities such as metals and metallic compounds can be purified to prepare extremely high-purity aqueous hydrogen peroxide.

    Abstract translation: 本文公开了一种通过使过氧化氢水溶液与强碱性阴离子交换树脂接触来制备高纯度过氧化氢水溶液的方法,所述方法包括使用强碱性阴离子交换树脂的步骤,其被转化为 通过使强碱性阴离子交换树脂与通过平均孔径为1.0μm以下的过滤器的液体试剂接触来净化过氧化氢水溶液时的交换基团。 根据本发明,可以纯化含有金属和金属化合物等无机杂质的过氧化氢水溶液,以制备极高纯度的过氧化氢水溶液。

    Process for separating multivalent metal Ions from autodeposition
compositions and process for regenerating ion exchange resins useful
therewith
    78.
    发明授权
    Process for separating multivalent metal Ions from autodeposition compositions and process for regenerating ion exchange resins useful therewith 失效
    用于将多价金属离子与自身沉积组合物分离的方法和用于再生与其有用的离子交换树脂的方法

    公开(公告)号:US5945170A

    公开(公告)日:1999-08-31

    申请号:US958710

    申请日:1997-11-17

    CPC classification number: B01J39/043 B01J45/00 B01J49/0008 B05D7/142 C09D5/088

    Abstract: The use of selected cation exchange resins to remove dissolved multivalent cations ions such as iron, zinc, and chromium from used autodeposition compositions permits reuse of the autodeposition compositions without the need for added surfactant and without developing any undesirable graininess or other texture in the coatings formed. Iminodiacetate cation exchange resins are very effective for removing iron ions when they are the only multivalent ions to be removed, and can be efficiently regenerated with 0.5 to 4% by weight aqueous hydrofluoric acid. By proper choice of other cation exchange resins and operating conditions, zinc can be selectively extracted from autodeposition baths containing both iron and zinc, and either iron or zinc can be selectively displaced from the loaded ion exchange resin.

    Abstract translation: 使用选择的阳离子交换树脂从使用的自动沉积组合物中除去溶解的多价阳离子离子如铁,锌和铬可以重新使用自沉积组合物,而不需要添加表面活性剂,并且不会在形成的涂层中产生任何不期望的颗粒状或其它质地 。 亚氨基二乙酸盐阳离子交换树脂当它们是唯一要除去的多价离子时非常有效,并且可以用0.5至4重量%的氢氟酸水溶液有效再生。 通过适当选择其他阳离子交换树脂和操作条件,可以从含有铁和锌的自沉积浴中选择性提取锌,并且铁或锌可以从负载的离子交换树脂中选择性地置换。

    Removal of lithium from polymer cements
    79.
    发明授权
    Removal of lithium from polymer cements 失效
    从聚合物水泥中去除锂

    公开(公告)号:US5847072A

    公开(公告)日:1998-12-08

    申请号:US652261

    申请日:1996-05-23

    CPC classification number: B01J39/043 C08C2/04 C08F6/02

    Abstract: The selectivity of ion exchange processes for the removal of lithium from acids is improved when weak acids such as citric and acetic, are used in the wash step. An added improvement is realized by a two stage process of contacting the acid solution first with an ion exchange resin functional to remove the nickel and aluminum compounds from the acid solution; and then contacting the acid solution with an ion exchange resin which is more selective to remove the alkali metal compound from the acid solution.

    Abstract translation: 在洗涤步骤中使用弱酸(如柠檬酸和乙酸)时,离子交换方法从酸中除去锂的选择性得到改善。 通过使酸溶液首先与用于从酸溶液中除去镍和铝化合物的离子交换树脂接触的两阶段方法实现了另外的改进; 然后使酸溶液与离子交换树脂接触,该离子交换树脂从酸溶液中除去碱金属化合物更具选择性。

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