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Languages : en
Pages : 12
Book Description
United States Patent : US6149885 : Method for Purifiying a Nickel Sulfate Solution by Solvent Extraction
The Purification of Nickel Sulphate Using Di-(2-ethylhexyl) Phosphoric Acid
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
A solvent extraction process has been developed to purify nickel sulphate solution with respect to calcium and magnesium by extraction with a 20 per cent v/v solution of di-(2-ethylhexyl) phosphoric acid in Shellsol AB. The process uses six extraction stages to purify solutions containing 100 g/l nickel. The co-extracted nickel is stripped off the organic in four stages using sulphuric acid, and calcium and magnesium are stripped using hydrochloric acid in one stage. The stripped organic is pre-loaded with nickel in four stages before it is introduced into the extraction circuit. The purified raffinate is passed over an activated carbon bed to remove dissolved solvent before the crystallization of nickel sulphate. The development of this process, via batch tests and bench-scale counter current test work, is described. A plant capable of producing twelve tons of nickel sulphate heptahydrate crystals per day was designed and constructed, and the operation of this plant is described.
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
A solvent extraction process has been developed to purify nickel sulphate solution with respect to calcium and magnesium by extraction with a 20 per cent v/v solution of di-(2-ethylhexyl) phosphoric acid in Shellsol AB. The process uses six extraction stages to purify solutions containing 100 g/l nickel. The co-extracted nickel is stripped off the organic in four stages using sulphuric acid, and calcium and magnesium are stripped using hydrochloric acid in one stage. The stripped organic is pre-loaded with nickel in four stages before it is introduced into the extraction circuit. The purified raffinate is passed over an activated carbon bed to remove dissolved solvent before the crystallization of nickel sulphate. The development of this process, via batch tests and bench-scale counter current test work, is described. A plant capable of producing twelve tons of nickel sulphate heptahydrate crystals per day was designed and constructed, and the operation of this plant is described.