Metal values are extracted from aqueous solutions of metal salts containing halide or pseudo halide ions by pyrimidine, pyrazine or pyridazine derivatives bearing the substituent --(C.dbd.O.X).sub.n where X is the group --OR.sub.1 or --NR.sub.2 R.sub.3 and n is 1, 2 or 3. R.sub.1 is a hydrocarbyl group containing from 1 to 36 carbon atoms and R.sub.2 and R.sub.2 together contain from 1 to 36 carbon atoms. The molecule as a whole contains from 5 to 36 alkyl carbon atoms and may carry further optional substituents. The process is especially useful for the recovery of metals from leach solutions derived from sulphur-containing ores.
金属价值可以从含有卤素或伪卤素离子的
金属盐
水溶液中,通过带有取代基--(C.dbd.O.X).sub.n的
嘧啶、
吡嗪或
吡嗪衍
生物中提取出来。其中,X是基团--OR.sub.1或--NR.sub.2 R.sub.3,n为1、2或3。R.sub.1是含有1至36个碳原子的烃基团,R.sub.2和R.sub.2在一起含有1至36个碳原子。整个分子含有5至36个烷基碳原子,并可能携带进一步的可选取代基。该过程特别适用于从含
硫矿石的浸出液中回收
金属。