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    Process for treating a sodium carbonate purge
    2.
    发明授权
    Process for treating a sodium carbonate purge 有权
    一种用于治疗Natriumcarbonatspülung方法

    公开(公告)号：EP2878579B1

    公开(公告)日：2017-02-15

    申请号：EP14192794.7

    申请日：2014-11-12

    申请人： Solvay SA

    发明人： Vandendoren, Alain

    IPC分类号： C01D7/24 ,  C01D7/12 ,  C01D1/42 ,  C01D1/22 ,  C22B26/10

    CPC分类号： C01D1/42 ,  C01D1/22 ,  C01D7/126 ,  C01D7/14 ,  C01D7/24 ,  C22B26/10

    摘要： A method for treating a purge stream derived from a sodium carbonate, sesquicarbonate, wegsheiderite, or bicarbonate crystallizer, said purge stream comprising sodium carbonate and/or sodium bicarbonate and at least 1 % by weight of sodium chloride and/or sodium sulfate, the method comprising : - causticizing at least 50 mol. % of the sodium from sodium carbonate and/or sodium bicarbonate into a caustic solution and into a calcium carbonate mud with lime and water, - separating the calcium carbonate mud from the caustic solution; - concentrating the caustic solution by removing part of the water to obtain a concentrated caustic solution comprising at least 25 % NaOH, and a crystallized solid comprising sodium carbonate and sodium chloride and/or sulfate, - separating the crystallized solid from the concentrated caustic solution, said crystallized solid to be disposed of or to be further valorized, - recycling part of the concentrated caustic solution to the sodium carbonate, sesquicarbonate, wegsheiderite, or bicarbonate crystallizer.

    Process for treating a sodium carbonate purge
    3.
    发明公开
    Process for treating a sodium carbonate purge 有权
    Verfahren zur Behandlung einerNatriumcarbonatspülung

    公开(公告)号：EP2878579A1

    公开(公告)日：2015-06-03

    申请号：EP14192794.7

    申请日：2014-11-12

    申请人： Solvay SA

    发明人： Vandendoren, Alain

    IPC分类号： C01D7/24 ,  C01D7/12 ,  C01D1/42 ,  C01D1/22

    CPC分类号： C01D1/42 ,  C01D1/22 ,  C01D7/126 ,  C01D7/14 ,  C01D7/24 ,  C22B26/10

    摘要： A method for treating a purge stream derived from a sodium carbonate, sesquicarbonate, wegsheiderite, or bicarbonate crystallizer,
    said purge stream comprising sodium carbonate and/or sodium bicarbonate and at least 1 % by weight of sodium chloride and/or sodium sulfate,
    the method comprising :
    - causticizing at least 50 mol. % of the sodium from sodium carbonate and/or sodium bicarbonate into a caustic solution and into a calcium carbonate mud with lime and water,
    - separating the calcium carbonate mud from the caustic solution;
    - concentrating the caustic solution by removing part of the water to obtain a concentrated caustic solution comprising at least 25 % NaOH, and a crystallized solid comprising sodium carbonate and sodium chloride and/or sulfate,
    - separating the crystallized solid from the concentrated caustic solution, said crystallized solid to be disposed of or to be further valorized,
    - recycling part of the concentrated caustic solution to the sodium carbonate, sesquicarbonate, wegsheiderite, or bicarbonate crystallizer.

    摘要翻译： 一种用于处理源自碳酸钠，倍半碳酸盐，wegeheiteite或碳酸氢盐结晶器的吹扫流的方法，所述吹扫流包含碳酸钠和/或碳酸氢钠和至少1重量％的氯化钠和/或硫酸钠，该方法 包括： - 苛化至少50mol。 ％的钠从碳酸钠和/或碳酸氢钠转化为苛性碱溶液，并用石灰和水分离成碳酸钙泥浆， - 将碳酸钙泥浆与苛性碱溶液分离; - 通过除去一部分水来浓缩苛性碱溶液以获得包含至少25％NaOH的浓缩苛性碱溶液和包含碳酸钠和氯化钠和/或硫酸盐的结晶固体， - 将浓缩的苛性碱溶液中的结晶固体分离， 所述结晶固体被处理或进一步加价， - 将部分浓缩的苛性碱溶液再循环到碳酸钠，倍半碳酸盐，weigheiteite或碳酸氢盐结晶器中。

    CONCENTRATED AQUEOUS SODIUM HYDROXIDE SOLUTION AND PROCESS FOR TREATING A SODIUM CARBONATE PURGE
    5.
    发明公开
    CONCENTRATED AQUEOUS SODIUM HYDROXIDE SOLUTION AND PROCESS FOR TREATING A SODIUM CARBONATE PURGE 审中-公开
    浓缩水性氢氧化钠溶液和处理碳酸钠净化液的方法

    公开(公告)号：EP3196165A1

    公开(公告)日：2017-07-26

    申请号：EP17156015.4

    申请日：2014-11-12

    申请人： Solvay SA

    发明人： VANDENDOREN, Alain

    IPC分类号： C01D7/24 ,  C01D7/12 ,  C01D1/42 ,  C01D1/22

    CPC分类号： C01D1/42 ,  C01D1/22 ,  C01D7/126 ,  C01D7/14 ,  C01D7/24 ,  C22B26/10

    摘要： Concentrated aqueous sodium hydroxide solution comprising: at least 25 wt % NaOH, and at least one soluble salt, said soluble salt comprising at least one of the following elements: As, Ba, B, Ca, Co, K, Li, Mg, Mo, P, Pb, Se, Si, Sr, Te, Tl, Ti, V, W, and the at least one of said elements being in specific concentrations ranges. And a process for producing such concentrated aqueous sodium hydroxide solution by treating a purge stream comprising sodium carbonate or bicarbonate.

    摘要翻译： 浓氢氧化钠水溶液，其包含：至少25重量％的NaOH和至少一种可溶性盐，所述可溶性盐包含以下元素中的至少一种：As，Ba，B，Ca，Co，K，Li，Mg，Mo ，P，Pb，Se，Si，Sr，Te，Tl，Ti，V，W和至少一种所述元素处于特定的浓度范围内。 以及通过处理包含碳酸钠或碳酸氢钠的清洗流来生产这种浓缩氢氧化钠水溶液的方法。

    Process for treating a sodium carbonate purge
    6.
    发明公开
    Process for treating a sodium carbonate purge 审中-公开
    处理碳酸钠清洗的方法

    公开(公告)号：EP2871156A1

    公开(公告)日：2015-05-13

    申请号：EP13192428.4

    申请日：2013-11-12

    申请人： Solvay SA

    发明人： VANDENDOREN, Alain

    IPC分类号： C01D7/24 ,  C01D7/12 ,  C01D1/42 ,  C01D1/22

    CPC分类号： C01D1/42 ,  C01D1/22 ,  C01D7/126 ,  C01D7/14 ,  C01D7/24 ,  C22B26/10

    摘要： A method for treating a purge stream derived from a sodium carbonate, sesquicarbonate, wegsheiderite, or bicarbonate crystallizer,
    said purge stream comprising sodium carbonate and/or sodium bicarbonate and at least 1 % by weight of sodium chloride and/or sodium sulfate,
    the method comprising :
    - causticizing at least 50 mol. % of the sodium from sodium carbonate and/or sodium bicarbonate into a caustic solution and into a calcium carbonate mud with lime and water,
    - separating the calcium carbonate mud from the caustic solution;
    - concentrating the caustic solution by removing part of the water to obtain a concentrated caustic solution comprising at least 25 % NaOH, and a crystallized solid comprising sodium carbonate and sodium chloride and/or sulfate,
    - separating the crystallized solid from the concentrated caustic solution, said crystallized solid to be disposed of or to be further valorized,
    - recycling part of the concentrated caustic solution to the sodium carbonate, sesquicarbonate, wegsheiderite, or bicarbonate crystallizer.

    摘要翻译： 处理来自碳酸钠，倍半碳酸盐，wegsheiderite或碳酸氢盐结晶器的清洗流的方法，所述清洗流包含碳酸钠和/或碳酸氢钠以及至少1重量％的氯化钠和/或硫酸钠，所述方法 包括： - 苛化至少50摩尔。 将碳酸钠和/或碳酸氢钠中的钠从碳酸钠和/或碳酸氢钠转化成苛性碱溶液并且与石灰和水一起转化成碳酸钙泥浆， - 从苛性碱溶液中分离碳酸钙泥浆; - 通过除去部分水来浓缩苛性碱溶液以获得包含至少25％NaOH的浓缩苛性碱溶液和包含碳酸钠和氯化钠和/或硫酸盐的结晶固体， - 将结晶固体与浓苛性碱溶液分离， 所述结晶固体被丢弃或被进一步增值， - 将部分浓碱溶液再循环到碳酸钠，倍半碳酸盐，wegsheiderite或碳酸氢盐结晶器中。

    PROCESS FOR THE MANUFACTURE OF SODIUM CARBONATE
    8.
    发明公开
    PROCESS FOR THE MANUFACTURE OF SODIUM CARBONATE 审中-公开
    用于生产钠

    公开(公告)号：EP1628915A1

    公开(公告)日：2006-03-01

    申请号：EP04741604.5

    申请日：2004-05-19

    申请人： SOLVAY (Société Anonyme)

    发明人： DEMILIE, Paul

    IPC分类号： C01D7/14 ,  C01D7/12

    CPC分类号： C01D7/126 ,  C01D7/12 ,  C01D7/14

    摘要： Process for the manufacture of sodium carbonate crystals comprising: the addition of solid sodium carbonate (1) to an aqueous solution coniprising sodium bicarbonate and sodium carbonate; the crystallization and the separation of sodium sesquicarbonate crystals; (B, C) the crystallization of sodium carbonate crystals, (E) the amount of sodium carbonate added being adjusted so that the crystallization of sesquicarbonate crystals can be carried out without preliminary evaporation of the aqueous suspension.