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本文认为伯胺可从近于中性的含五价钒和六价铬的水溶液中定量地萃钒,当平衡水相pH高于7时,在相同条件下叔胺实际上不能萃钒,而仲胺也只能萃取25—30％,如果水溶液中不含有铬,钒也可定量地被伯胺萃取,此时需向水溶液中加入与钒的克原子数相当或稍过量的酸,文中还认为伯胺系按溶剂化历程萃钒的机理进行,伯胺在中性和弱碱性平衡条件下萃钒,主要靠氢键与四钒酸形成分子缔合物。
This paper considers that primary amines can extract vanadium quantitatively from nearly neutral aqueous solutions containing pentavalent vanadium and hexavalent chromium. When the equilibrium aqueous phase pH is above 7, the tertiary amine can not actually extract vanadium under the same conditions Secondary amine can only extract 25-30%, if the aqueous solution does not contain chromium, vanadium can also be quantitatively primary amine extraction, the need to be added to the aqueous solution with vanadium gram atoms of a considerable or slightly excessive acid, the text also It is considered that the primary amine is based on the mechanism of extracting vanadium by solvation process. The primary amine extracts vanadium under the condition of neutral and weak alkaline equilibrium, and mainly forms the molecular association with tetra-vanadic acid by hydrogen bond.