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1. 发明授权

US3904733A Prevention of calcium deposition from trona-derived sodium carbonate liquors 失效
标题翻译：防止来自天然来源的碳酸钠液体的钙沉积
公开(公告)号：US3904733A
公开(公告)日：1975-09-09
申请号：US37179973
申请日：1973-06-20
申请人： ALLIED CHEM
发明人： GANCY ALAN B , PONCHA RUSTOM P
IPC分类号： C01D7/12 , C01D7/37 , C01D7/22
CPC分类号： C01D7/126 , C01D7/123 , C01D7/37
摘要： A method of producing a concentrated sodium carbonate solution low in calcium from calcined natural trona to minimize the deposition of pirssonite on the surfaces of processing equipment exposed to the solution from which the insoluble impurities, normally present in natural trona, have been separated. The method comprises dissolving the calcined trona in a hot aqueous medium to form a concentrated solution containing insoluble impurities and soluble calcium salts and adding an amount of pirssonite effective to insolubilize the major portion of the soluble calcium in the sodium carbonate solution. The pirssonite may be added to the calcined trona either before, during or after its dissolution. The pirssonite may also be added by recycling excess muds back to the sodium carbonate solution from which the insoluble impurities have not been separated. In addition, the sodium carbonate solution may be aged in the presence of the contained insoluble impurities prior to their separation from the sodium carbonate solution to reduce the amount of soluble calcium salts.
摘要翻译：从煅烧的天然天然碱生产低钙的浓缩碳酸钠溶液的方法，以最小化暴露于通常存在于天然天然碱中的不溶性杂质已经分离的溶液的处理设备的表面上的pirssonite的沉积。该方法包括将煅烧的天然碱溶解在热水介质中以形成含有不溶性杂质和可溶性钙盐的浓缩溶液，并加入一定量的有效使不溶于碳酸钠溶液中的可溶性钙的皮松毒素。可以在其溶解之前，期间或之后将pirssonite加入到煅烧的天然碱中。还可以通过将多余的泥浆回收到不溶性杂质未分离的碳酸钠溶液中来加入吡咱动物。此外，碳酸钠溶液在与碳酸钠溶液分离之前可以在所含的不溶性杂质存在下老化，以减少可溶性钙盐的量。

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