公开(公告)号：US20120082602A1

公开(公告)日：2012-04-05

申请号：US13257107

申请日：2010-03-16

申请人： Ingrid Anne Munz ,  Arne Raaheim ,  Harald Johansen ,  Jan Kihle ,  Oyvind Brandvoll ,  Are Korneliussen

发明人： Ingrid Anne Munz ,  Arne Raaheim ,  Harald Johansen ,  Jan Kihle ,  Oyvind Brandvoll ,  Are Korneliussen

IPC分类号： C01F11/18

CPC分类号： C01F11/181

摘要： Method for industrial manufacture of pure (precipitated) CaCO3 comprising providing at least one naturally occurring carbonate bearing rock and comminuting said rock to increase its surface area. In a first reaction zone (R1) the comminuted carbonate bearing rock is contacted with water and CO2 at a pressure higher than standard pressure, at a temperature in the range 30-500° C. and at a pH lower than 5 to thereby dissolve the carbonate. Dissolved material is conveyed from the first reaction zone (R1) to a second reaction zone (R2) held at a lower pressure than the first reaction zone and a pH higher than that of the first reaction zone, the presence of H+ ions in first and second reaction zones being caused by the reaction between CO2 and water. In the second reaction zone the calcium carbonate is precipitated at a pH higher than 5.

摘要翻译： 工业生产纯（沉淀）CaCO 3的方法，包括提供至少一种天然存在的碳酸盐岩，并粉碎所述岩石以增加其表面积。 在第一反应区（R1）中，粉碎的含碳酸酯的岩石在高于标准压力的压力下，在30-500℃的温度和低于5℃的pH下与水和CO 2接触，从而溶解 碳酸盐。 将溶解的材料从第一反应区（R1）输送到保持在比第一反应区低的压力下的第二反应区（R2），并且pH高于第一反应区的pH，首先存在H +离子， 第二反应区是由二氧化碳和水之间的反应引起的。 在第二反应区中，碳酸钙在高于5的pH下沉淀。