| 摘要 |
<p>PCT No. PCT/AU87/00182 Sec. 371 Date Feb. 24, 1988 Sec. 102(e) Date Feb. 24, 1988 PCT Filed Jun. 25, 1987 PCT Pub. No. WO88/00249 PCT Pub. Date Jan. 14, 1988.A method of extracting tungsten values from tungsten containing ores comprising step (i) forming a mixture of a tungsten containing ore and a first mineral acid adapted to consume acid consuming substances in the ore and step (ii) thereafter adding organic anions to produce a solution containing dissolved tungsten values.</p> |
