2) purifying by extraction
萃取除杂
1.
Nickel sulfate can be obtained from the alloy scrap by a process of "leaching by mixed acid-deposition of Sn by Na 2CO 3-iron removal by Na 2CO 3-purifying by extraction-crystallization by concentration", and sodium stannate can be obtained from residue through deposition of Sn by a process of "dissolving by alkali-quenching in water-crystallization by concentration".
Ni-Sn-Fe合金废料经混酸浸出、Na2 CO3沉锡、Na2 CO3除铁、萃取除杂、浓缩结晶可得硫酸镍 ;所沉锡渣碱溶、水淬、浓缩结晶可得锡酸钠。
3) removing calcium with solvent extraction
萃取除钙
4) copper removal by extraction
萃取除铜
5) Fe~(3+) extraction
铁萃取
6) multistage separation dewaxing
多级萃取除蜡
补充资料：内吸除(见单晶片的吸除技术)
内吸除(见单晶片的吸除技术)
internal gettering
内吸除internal gettering见单晶片的吸除技术。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条