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Zinc electrowinning with 2‐butyne‐1,4‐diol
Author(s) -
Piron D. L.,
Mathieu D.,
D'Amboise M.
Publication year - 1987
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.5450650426
Subject(s) - zinc , nickel , electrowinning , trimer , impurity , chemistry , electrolyte , spectrophotometry , diol , ion , inorganic chemistry , nuclear chemistry , chromatography , organic chemistry , electrode , dimer
Abstract The beneficial effect of 2‐butyne‐1,4‐diol on zinc current efficiency in the presence of nickel impurity has been examined. Several techniques including HPLC, absorption spectrophotometry and constant current deposition experiments have shown that a trimer of 2‐butyne‐1,4‐diol is responsible for the removal of Ni ions from the electrolyte, thus increasing the current efficiency of the zinc electrowinning process from sulphate solutions (60 g/L Zn + 200 g/L H 2 SO 4 ) in the presence of Ni ions.