Purification of Sulphate Leach Liquor of Spent Raneynickel Catalyst Containing Al and Ni by Solvent Extraction with Organophosphorus-Based Extractants

Table 1

Effect of stripping agents on stripping efficiency of Al from loaded organic (L.O; 6.47 g/L).

Stripping agent	Concentration (M)	Al stripping (%)
HCl	0.1	34.6
	0.5	52.3
	1.0	87.4
HNO3	0.1	39.0
	0.5	68.9
	1.0	83.5
H2SO4	0.1	53.9
	0.5	74.3
	1.0	99.6