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Method for removing sodium ion from recovered nickle sulfate solution of waste nickle-hydrogen and nickle-cadmium

A technology for nickel-cadmium batteries and nickel-hydrogen batteries is applied in the field of removing sodium ions, which can solve the problems of high cost, complicated process, and difficulty in obtaining high-quality nickel sulfate crystals, and achieves low cost, improved quality, and excellent crystal quality. Effect

Active Publication Date: 2008-05-21
广东芳源新材料集团股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The mother liquor precipitation washing method consumes alkali and acid equivalent to nickel, and the cost is high and the process is complicated
And when the sodium in the mother liquor is enriched to seriously affect the quality of nickel sulfate, it is also difficult to obtain high-quality nickel sulfate crystals.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] (1), the anode material of spent nickel-metal hydride battery, nickel-cadmium battery is leached with sulfuric acid, and the sulfuric acid consumption is 105% of its theoretical consumption, and leaching reaction is 9 hours;

[0024] (2) Heating the reaction mixture to 95°C, then adding the negative electrode material of the waste nickel-hydrogen battery, and stirring and reacting at normal pressure for 180 minutes at the same time, utilizing the rare earth element contained in the negative electrode material of the waste nickel-hydrogen battery to generate sulfuric acid in the sulfate mixture system Precipitation of rare earth double salts to carry out the precipitation reaction of sodium ions;

[0025] (3), filter and remove filter residue, can remove the sodium ion in the nickel sulfate solution of waste nickel-metal hydride, nickel-cadmium battery recovery;

[0026] (4), the filtrate after removing sodium ions is removed by di-(2-ethylhexyl) phosphoric acid (P204) e...

Embodiment 2

[0028] (1), the anode material of spent nickel-hydrogen battery, nickel-cadmium battery is leached with sulfuric acid, and sulfuric acid consumption is 110% of its theoretical consumption, and leaching reaction is 6 hours;

[0029] (2) Heating the reaction mixture to 70°C, then adding the negative electrode material of the waste nickel-hydrogen battery, and stirring and reacting at normal pressure for 120 minutes at the same time, using the rare earth elements in the negative electrode material of the waste nickel-hydrogen battery to generate sulfuric acid in the sulfate mixture system Precipitation of rare earth double salts to carry out the precipitation reaction of sodium ions;

[0030] (3), filter and remove filter residue, can remove the sodium ion in the nickel sulfate solution of waste nickel-metal hydride, nickel-cadmium battery recovery;

[0031] (4) The filtrate after removing sodium ions is removed by di-(2-ethylhexyl) phosphoric acid extraction system, di-(2-ethylh...

Embodiment 3

[0033] (1), the anode material of spent nickel-hydrogen battery, nickel-cadmium battery is leached with sulfuric acid, and the sulfuric acid consumption is 140% of its theoretical consumption, and leaching reaction is 5 hours;

[0034] (2), heating reaction mixture to 65 ℃, then adding rare-earth metals, stirring and reacting at normal pressure for 80 minutes simultaneously, make the rare-earth sulfate double salt precipitation in the sulfate mixture system, carry out the precipitation reaction of sodium ion;

[0035] (3), filter and remove filter residue, can remove the sodium ion in the nickel sulfate solution of waste nickel-metal hydride, nickel-cadmium battery recovery;

[0036] (4) The filtrate after removing sodium ions is removed by di-(2-ethylhexyl) phosphoric acid extraction system, di-(2-ethylhexyl) phosphonic acid mono(2-ethylhexyl) ester extraction and separation of nickel and cobalt, to obtain a sodium ion content of less than 100mg / L nickel sulfate solution.

...

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PUM

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Abstract

A method for removing sodium ion from waste nickel hydrogen and nickel cadmium recovered nickelous sulfate solution is carried out by leaching out for positive materials of waste nickel hydrogen and nickel cadmium cell from sulfuric acid, heating reactive mixture at 60í½95íÒC, adding into additive containing rare earth element, generating rare earth double salt sulfate deposition in sulfate salt system, deposition reacting for sodion, filtering and removing filter residue to obtain nickelous sulfate solution with low sodium ion content. It costs low and is simple, safety and efficient.

Description

technical field [0001] The invention relates to a method for removing sodium ions in a soluble sulfate mixture solution, in particular to a method for removing sodium ions from nickel sulfate solution recovered from waste nickel hydrogen and nickel cadmium batteries. Background technique [0002] Nickel sulfate, xNiSO4·6H 2 O·yNiSO 4 ·7H 2 O is often used as an important raw material in the electroplating industry, such as pre-nickel plating, nickel plating, nickel-iron alloy plating, nickel-cobalt alloy plating, nickel-zinc alloy plating, and also in electroless nickel plating solutions. Used in the manufacture of nickel-cadmium batteries, nickel-hydrogen batteries, catalysts for hardening oils or paints, mordants for vat dyes, metal colorants, etc., and can also be used to prepare nickel catalysts and other nickel salts. [0003] At present, my country has become a big country in battery production and consumption. With the extensive use of nickel-metal hydride and nic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/54C01G53/10C01B17/96
CPCY02E60/12Y02W30/84
Inventor 罗爱平
Owner 广东芳源新材料集团股份有限公司
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