The inorganic chemicals with high purity and low cost directly from ores can be produced through the concentration, separation and purification of solvent extractions.
应用萃取富集、分离、提纯，可以由矿石直接生产金属无机盐，纯度高、成本低。
Tannin fractions with different molecular weight distributions were obtained by purification of alcohol precipitation and fractionation of solvent extractions of black wattle bark tannins.
通过对黑荆树皮单宁进行醇沉纯化和溶剂萃取分级，可得到分子量分布范围不同的单宁级分。
Advantages and disadvantages of several sorts of extractions were introduced. The development to palladium recovery with solvent extraction in the future was analyzed.
并对各种类型的萃取剂萃取钯的优缺点做了评述，指出了溶剂萃取法回收钯的发展前景。
Advantages and disadvantages of several sorts of extractions were introduced. The development to palladium recovery with solvent extraction in the future was analyzed.
并对各种类型的萃取剂萃取钯的优缺点做了评述，指出了溶剂萃取法回收钯的发展前景。
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