Tungsten Recovery from Searles Lake Brines by Ion Exchange.
107th Ann Mtg Soc Min Eng AIME Denver, Colorado, 1978 Feb; :11 pages
The Bureau of Mines conducted laboratory tests to develop a process for recovering a marketable grade of tungsten from the brine of Searles Lake, California. The brine contains only 56 parts per million (ppm) of tungsten (70 ppm wo3). Using ion exchange resins synthesized by Bureau chemists, 98 percent of the tungsten was extracted from the brine and 92 percent of the tungsten was recovered as a marketable iron-tungsten concentrate containing 44 percent tungsten as tungsten trioxide. Although major technical problems have largely been resolved, research is progressing to escalate testing in a process investigation unit to provide more reliable data for an economic appraisal.
107th Ann. Mtg., Soc. Min. Eng., AIME, Denver, Colorado, Feb. 28-Mar. 2, 1978, SME Preprint 78-B-74