An effective ion exchange operation to remove tungsten from Searles Lake brines using a pilot unit that has been operating since July 1979 at the Kerr-McGee Corp., Trona, California, is described. The extractive technique, developed by the Bureau of Mines, is based on a new tungsten-selective resin designated qrf. The objectives of the investigation includes, (1) proving the operational viability during seasonal changes in brine properties, (2) providing a tungsten-rich solution to enable completion of tungsten recovery research, and (3) supplying data for system escalation to enable recovering nearly 227,000 kg per year of tungstic oxide.
Tungsten News, V. 18, No. 3, Summer 1980, PP. 3-4.