Purification of Nickel Sulfate by Batch Cooling Crystallization

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Abstract

Cooling crystallization was successfully carried out in a batch cooling crystallizer
from impure acidic solutions to recover nickel as nickel sulfate salt with three different cooling rates. The compositions of the solutions included impurities of sodium, magnesium, chloride and sulfuric acid in order to mimic industrial electrowinning process solutions. The results show that nickel sulfate hexahydrate (NiSO4·6H2O) mainly crystallized and its solubility and purity decreased with the increase in mass ratio of chloride to sulfate. Cooling rates did not have significant influence of crystal purity, however, it did affect the filter cake moisture. Lower moisture can be obtained with lower cooling rate.

Details

Original languageEnglish
Pages30-35
Number of pages6
Publication statusPublished - 2018
MoE publication typeNot Eligible
EventInternational Workshop on Industrial Crystallization - University of Rouen Normandy , Rouen, France
Duration: 5 Sep 20187 Sep 2018
Conference number: 25
https://labsms.univ-rouen.fr/en/content/biwic2018

Workshop

WorkshopInternational Workshop on Industrial Crystallization
Abbreviated titleBIWIC
CountryFrance
CityRouen
Period05/09/201807/09/2018
Internet address

ID: 27831751