-
1.发明申请Removal of impurities in the production of crystalline sodium carbonate, bicarbonate, or sulfite 有权在生产结晶碳酸钠，碳酸氢盐或亚硫酸盐时除去杂质公开(公告)号：US20100226840A1
公开(公告)日：2010-09-09
申请号：US12718098
申请日：2010-03-05
摘要： A magnesium treatment for removing water-soluble impurities in a process for making crystalline sodium carbonate, bicarbonate, or sulfite. A waste comprising such impurities is treated with a magnesium compound to form water-insoluble matter which is removed to form a purified solution. The treatment may be performed on a solution which contains the waste and optionally dissolved calcined trona. The purified solution may be used as a feedstock to form crystalline soda ash, and/or used as a reactant to produce crystalline sodium sulfite or bicarbonate via reaction with SO2 or CO2. In preferred embodiments, the waste may comprise a purge or weak liquor, a reclaimed solid, or combinations thereof. The water-soluble impurities may be silicates and/or foam-causing impurities, and the waste may contain sodium bicarbonate, sodium sesquicarbonate, and/or one or more sodium carbonate hydrates, such as decahydrate.
摘要翻译： 在制造结晶碳酸钠，碳酸氢盐或亚硫酸盐的方法中除去水溶性杂质的镁处理。 包含这种杂质的废物用镁化合物处理以形成水不溶性物质，其被除去以形成纯化溶液。 处理可以在含有废物和任选溶解的煅烧天然碱的溶液上进行。 纯化的溶液可以用作原料以形成结晶苏打灰，和/或用作反应物以通过与SO 2或CO 2反应产生结晶亚硫酸钠或碳酸氢盐。 在优选的实施方案中，废物可以包含吹扫或弱液，再生固体或其组合。 水溶性杂质可以是硅酸盐和/或引起泡沫的杂质，并且废物可以含有碳酸氢钠，倍半碳酸钠和/或一种或多种碳酸钠水合物，例如十水合物。
-
2.发明申请Impurities removal from waste solids in the production of soda ash, sodium bicarbonate and/or other derivatives 有权在苏打灰，碳酸氢钠和/或其他衍生物的生产中从废物固体中除去杂质公开(公告)号：US20110274599A1
公开(公告)日：2011-11-10
申请号：US13099501
申请日：2011-05-03
摘要： A method for removing impurities from a waste solid to provide at least a portion of a suitable crystallizer feed to a process for making crystalline sodium carbonate, bicarbonate, and/or other derivatives. The method comprises: contacting the waste solid with a leach solution to dissolve at least one impurity and dissolving the resulting leached residue. Leaching may include heap percolation. The leach solution may comprise a crystallizer purge liquor, a process waste effluent, a mine water, or mixtures thereof. The method may further comprise adding a magnesium compound to the resulting leached residue during or after its dissolution to remove another impurity. The waste solid preferably comprises a pond solid containing such impurities. The pond solid may be recovered from a pond receiving crystallizer purge liquor(s) and/or other process waste effluent(s). The pond solid may contain sodium carbonate, any hydrate thereof, sodium bicarbonate, and/or sodium sesquicarbonate. The impurities to be removed may comprise sodium chloride, sodium sulfate, silicates, and/or organics.
摘要翻译： 从废弃固体中除去杂质的方法，以提供至少一部分合适的结晶器进料，以制备结晶碳酸钠，碳酸氢盐和/或其它衍生物的方法。 该方法包括：使废弃物与浸出溶液接触以溶解至少一种杂质并溶解所产生的浸出残渣。 浸出可能包括堆渗。 浸出溶液可以包括结晶器清洗液，工艺废物流出物，矿井水或其混合物。 该方法可以进一步包括在其溶解期间或之后向所产生的浸出残渣中加入镁化合物以除去另一种杂质。 废固体优选包含含有这种杂质的池塘固体。 池塘固体可以从接收结晶器清洗液和/或其它工艺废物流出物的池中回收。 池塘固体可以含有碳酸钠，其任何水合物，碳酸氢钠和/或倍半碳酸钠。 待除去的杂质可包括氯化钠，硫酸钠，硅酸盐和/或有机物。
-
搜索结果
2 条记录 (耗时 0.027 秒)
