公开(公告)号：US5270023A

公开(公告)日：1993-12-14

申请号：US969061

申请日：1992-10-30

Applicant: Frank H. May ,  Fred C. Hohne

Inventor： Frank H. May ,  Fred C. Hohne

IPC: C01D7/12 ,  C01D7/18 ,  C01D7/26

CPC classification number: C01D7/12 ,  C01D7/18

Abstract: A process for producing sodium carbonate from a variety of crude ores and brine containing sodium bicarbonate and sodium carbonate without the use of calcium carbonate. The process includes the steps of reacting the raw materials containing sodium bicarbonate and sodium carbonate with a bicarbonate filtrate containing ammonium chloride brine solution under heat, producing ammonia, carbon dioxide, and a mother liquor containing an aqueous solution of sodium chloride which is recycled. This solution may contain also sodium bicarbonate and sodium carbonate to enhance production. The mother liquor is separated and reacted with ammonia and carbon dioxide collected from the reacting step to crystalize sodium bicarbonate and produce an ammonium chloride brine solution which is recycled to react with the crude ore. In summary, the process will produce the equivalent sodium carbonate related to the ammonium chloride content of the bicarbonate filtrate in addition to the dissolved sodium carbonate values in the recycled ammonium chloride brine. The solution may be carried out on mined crude ore above ground or instead heated ammonium chloride brine solution may be pumped directly into the ore body in situ. Alternatively, heated sodium chloride solution may be passed through an underground ore deposit and the resulting solution reacted with ammonium chloride brine solution.

Abstract translation: 从不使用碳酸钙的各种粗矿石和含有碳酸氢钠和碳酸钠的盐水中生产碳酸钠的方法。 该方法包括以下步骤：将含有碳酸氢钠和碳酸钠的原料与含有氯化铵盐水溶液的碳酸氢盐滤液在加热下反应，生成氨，二氧化碳和含有再循环氯化钠水溶液的母液。 该溶液还可以含有碳酸氢钠和碳酸钠以增加生产。 将母液分离并与从反应步骤中收集的氨和二氧化碳反应以结晶碳酸氢钠并产生氯化铵盐水溶液，其被再循环以与粗矿石反应。 总之，除循环氯化铵盐水中溶解的碳酸钠值之外，该方法将产生与碳酸氢盐滤液中氯化铵含量相关的当量碳酸钠。 溶液可以在地上开采的粗矿石上进行，或者加热的氯化铵盐水溶液可以直接泵入矿体中。 或者，加热的氯化钠溶液可以通过地下矿床，所得溶液与氯化铵盐水溶液反应。