公开(公告)号：US4298577A

公开(公告)日：1981-11-03

申请号：US907630

申请日：1978-05-19

申请人： Ludwig Ashtheimer ,  Hans-Joachim Schenk ,  Klaus Schwochau

发明人： Ludwig Ashtheimer ,  Hans-Joachim Schenk ,  Klaus Schwochau

IPC分类号： B01D15/00 ,  C22B60/02 ,  C01G43/00

CPC分类号： C22B60/0256 ,  Y02P10/212

摘要： Granulated lignite (brown coal) is used to provide an adsorption matrix with which sea water is brought into contact long enough to reach a substantially maximum adsorption of uranium, after which the adsorption matrix is removed from the solution and is burned with utilization of its heating value while the heavy metals are concentrated in the combustion residue, after which the thus concentrated heavy metals are recovered in the form of their salts by previously known treatment. An average grain diameter of the granular lignite between 0.5 and 2 mm is used and about 3 mg of uranium per kg of dry lignite is adsorbed with a contact time in the region between one and sixty seconds. Uranium adsorption falls off when there is a substantially greater concentration of foreign ions, particularly calcium, magnesium and sulphate.

摘要翻译： 使用制粒褐煤（褐煤）提供吸附基质，使海水接触足够长的时间以达到铀的基本最大吸附量，然后从溶液中除去吸附基质，并利用其加热 而重金属则集中在燃烧残渣中，之后通过先前已知的处理将这样浓缩的重金属以其盐的形式回收。 使用0.5至2mm之间的颗粒状褐煤的平均颗粒直径，并且在1-6秒之间的区域内吸附每kg干褐煤约3mg铀。 当外来离子，特别是钙，镁和硫酸盐的浓度大大增加时，铀吸附就会脱落。