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Method capable of improving acid resistance during reverse extraction of extraction agent containing pyridine carboxylic ester and dinonylnaphthalene sulfonic acid and application of method

A technology of dinonylnaphthalene sulfonic acid and pyridine carboxylate, which is applied in the field of metallurgical extraction of non-ferrous metals, can solve the problems of inability to separate phases in back extraction, poor acid resistance of extraction agents, and long time for back extraction and phase separation, so as to avoid phase separation If the time is too long, the effect of improving acid resistance and shortening the time of stripping and phase separation

Inactive Publication Date: 2016-06-22
CENT SOUTH UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, the extraction agent has poor acid resistance during stripping. When the stripping agent is H + Concentration greater than 1mol / L (such as: H + Severe emulsification occurs when the sulfuric acid or hydrochloric acid solution with a concentration of 2mol / L~4mol / L) causes the back extraction to fail to separate phases and cannot meet the needs of industrial applications; when the back extraction agent H + When the concentration is equal to 1mol / L, the time of stripping and phase separation is too long, and Ni in the stripping solution 2+ The maximum concentration is 20.83g / L, which cannot meet the requirement of nickel electrolyte for Ni 2+ content requirements
[0003] At present, there is no one that can selectively extract Ni and Co from multi-metal acidic solutions containing Fe, Ca, Mg, Co, Ni, and make the nickel content in the back extraction solution meet the industrial requirements of nickel electrolyte, and can effectively Method for improving acid resistance during stripping of extractant containing pyridine carboxylate and dinonylnaphthalenesulfonic acid

Method used

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  • Method capable of improving acid resistance during reverse extraction of extraction agent containing pyridine carboxylic ester and dinonylnaphthalene sulfonic acid and application of method
  • Method capable of improving acid resistance during reverse extraction of extraction agent containing pyridine carboxylic ester and dinonylnaphthalene sulfonic acid and application of method
  • Method capable of improving acid resistance during reverse extraction of extraction agent containing pyridine carboxylic ester and dinonylnaphthalene sulfonic acid and application of method

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Experimental program
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Effect test

Embodiment 1

[0032] Fix the acid concentration (H + Concentration is 1.0mol / L of sulfuric acid or hydrochloric acid solution), investigate the impact of the amount of TOPO added on the acid resistance of the extractant during back extraction.

[0033] To containing pyridine carboxylate (0.9mol / L) and dinonyl naphthalene sulfonic acid (0.45mol / L) extractant, add TOPO (having the mol ratio of TOPO involved in the "summary of the invention" and dinonyl naphthalene sulfonic acid The range is 1:1~3:1), using sulfonated kerosene as a diluent to prepare the extractant (ie oil phase). Preparation of cobalt, nickel acidic solution (i.e. extracted water phase) containing impurities such as iron, calcium and magnesium, wherein Ni 2+ The concentration is 2.5~4.0g / L, Co 2+ The concentration is 0.25~0.28g / L, Fe 3+ The concentration is 9.8~10.0g / L, Mg 2+ The concentration is 4.5~5.17g / L, Ca 2+The concentration is 0.2-0.25g / L, and the pH value is about 2. Extraction operation: Add 50ml of the oil ph...

Embodiment 2

[0039] Add TOPO to the extractant containing pyridine carboxylate (0.9mol / L) and dinonylnaphthalenesulfonic acid (0.45mol / L), keep the molar ratio of TOPO and DNNSA at 2:1, and investigate the effect of the acidity of the stripping agent on the extractant The impact of acid resistance during stripping.

[0040] Add TOPO (the molar ratio of TOPO to dinonylnaphthalenesulfonic acid is 2:1) to the pyridine carboxylate (0.9mol / L) and dinonylnaphthalenesulfonic acid (0.45mol / L), using sulfonated kerosene As a diluent, it is prepared as an extractant (ie oil phase). Preparation of cobalt, nickel acidic solution (i.e. extracted water phase) containing impurities such as iron, calcium and magnesium, wherein Ni 2+ Concentration is 2.5~3.5g / L, Co 2+ The concentration is 0.25g / L, Fe 3+ The concentration is 9.8~10.1g / L, Mg 2+ The concentration is 5.0~5.2g / L, Ca 2+ The concentration is 0.2-0.25g / L, and the pH value is about 2. Extraction operation: Add 50ml of the oil phase and the ex...

Embodiment 3

[0046] Add TOPO to the extractant containing pyridine carboxylate and dinonylnaphthalenesulfonic acid, keep the molar ratio of TOPO and DNNSA at 2:1, and fix the stripping agent as H + Sulfuric acid or hydrochloric acid solution with a concentration of 1.0mol / L was used to investigate the effect of the relative amount of pyridine carboxylate and dinonylnaphthalenesulfonic acid on the extraction rate of cobalt nickel metal ions and the removal rate of iron, calcium and magnesium impurities.

[0047] Add TOPO (TOPO The molar ratio to dinonylnaphthalene sulfonic acid is 2:1), using sulfonated kerosene as a diluent to prepare the extractant (ie, the oil phase). Preparation of cobalt, nickel acidic solution (i.e. extracted water phase) containing impurities such as iron, calcium and magnesium, wherein Ni 2+ The concentration is 2.5~4.0g / L, Co 2+ The concentration is 0.25~0.28g / L, Fe 3+ The concentration is 9.8~10.1g / L, Mg 2+ The concentration is 5.0~5.2g / L, Ca 2+ The concentra...

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Abstract

The invention discloses a method capable of improving acid resistance during reverse extraction of an extraction agent containing pyridine carboxylic ester and dinonylnaphthalene sulfonic acid and an application of the method. The application method is characterized in that the acid resistance during reverse extraction of the extraction agent can be obviously improved after trioctylphousphine oxide is added into the extraction agent containing pyridine carboxylic ester and dinonylnaphthalene sulfonic acid; moreover, nickel content in reverse extraction liquor can meet industrial needs of nickel electrolyte, the effect of simultaneously extracting Ni and Co from a multi-metal acid solution containing Fe, Ca, Mg, Co and Ni is not affected, and the removal effect on iron-calcium-magnesium impurities is not affected.

Description

technical field [0001] The invention relates to a metallurgical extraction method for nonferrous metals, in particular to a method and application that can effectively improve the acid resistance of an extractant containing pyridine carboxylate and dinonylnaphthalenesulfonic acid (DNNSA) during back extraction. At the same time, it also relates to a method capable of selectively and simultaneously extracting Co and Ni from multi-metal acidic solutions containing Fe, Ca, Mg, Co and Ni. Background technique [0002] The extractant containing pyridine carboxylate and dinonylnaphthalene sulfonic acid (DNNSA) has been applied to the selective and simultaneous extraction of Ni and Co in multi-metal acidic solutions containing Fe, Ca, Mg, Co, and Ni. However, the extraction agent has poor acid resistance during stripping. When the stripping agent is H + Concentration greater than 1mol / L (such as: H + Severe emulsification occurs when the sulfuric acid or hydrochloric acid solutio...

Claims

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Application Information

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IPC IPC(8): C22B3/40C22B23/00
CPCC22B23/0453C22B3/406Y02P10/20
Inventor 胡慧萍朱山李吉源陈启元
Owner CENT SOUTH UNIV
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