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Method for recovering nickel from electroplating waste liquid by using diphosphonic acid extracting agent

A technology for electroplating waste liquid and extraction agent, applied in the field of hydrometallurgy, can solve the problems of increasing the amount of treatment after extraction, the inability of nickel reserves to meet the demand, the consumption of large alkaline reagents, etc. The effect of volatilization and reduction of organic phase loss

Active Publication Date: 2021-02-19
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In 2019, China's nickel ore resources ranked ninth in the world, with a total of about 7.84 million tons. However, with the rapid economic development, China has become the world's largest nickel consumer, and nickel reserves still cannot meet the demand.
[0004] At present, the traditional extraction method usually uses acidic organophosphorus (phosphine) acid extractant, "Electroplating waste treatment method" (CN 107245585 A), using P507 as the extractant, divided into 5 sections, to extract nickel, but need to use Sodium hydroxide and other alkaline reagents are used to treat the extractant with sodium soap, which not only consumes a large amount of alkaline reagents, but also produces a large amount of waste water, causing environmental pollution
"A method for cleanly extracting nickel cobalt" (CN 10683472 A) uses one or more of P204, P507 and cyanex272 as extraction agents, and adjusts various factors that affect the extraction rate. Although saponification is not used, the steps More cumbersome, more extraction times
For the mixed extractant of ketoxime, "A method for extraction and separation of nickel, iron and copper in electrolyte" (CN 102251253 A) uses LIX984 as the extractant to achieve the separation of the three elements, but it is necessary to add a masking agent and Use concentrated ammonia to increase the pH, increasing the amount of post-treatment at the end of extraction

Method used

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  • Method for recovering nickel from electroplating waste liquid by using diphosphonic acid extracting agent
  • Method for recovering nickel from electroplating waste liquid by using diphosphonic acid extracting agent
  • Method for recovering nickel from electroplating waste liquid by using diphosphonic acid extracting agent

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Experimental program
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Effect test

Embodiment 1

[0025] (1) to contain Ni 2+ The electroplating waste solution is the water phase, and the Ni in the water phase 2+ The concentration is 0.7 g / L, and the pH of the aqueous phase is 4.

[0026] (2) Prepare 0.025mol / L HADMPPA and OADMPPA as the organic phase with diluent, dichloromethane, toluene, dichloroethane and chloroform respectively.

[0027] (3) Mix 5 mL each of the aqueous phase and the organic phase, extract for 10 min, and extract at 25 °C, and measure Ni in the raffinate 2+ See Table 1 for the concentration of the diluent on the extraction rate.

[0028] (4) Use 0.1mol / L dilute hydrochloric acid to carry out organic back-extraction after extraction. The back-extraction time is 20 minutes, the back-extraction temperature is 20°C, and the back-extraction rate is above 99%.

[0029]

Embodiment 2

[0031] (1) to contain Ni 2+ The electroplating waste solution is the water phase, and the Ni in the water phase 2+ The concentration of the solution is 0.8 g / L, and the pH of the aqueous phase is 1.

[0032] (2) Using chloroform as the diluent, prepare 0.0565 mol / L HADMPPA as the organic phase.

[0033] (3) 10 mL of the aqueous phase and organic phase were mixed, the extraction time was 10 min, the extraction temperature was 15 °C, and the Ni in the raffinate was determined 2+ The concentration and extraction rate are shown in Table 2.

[0034] (4) Use 0.1mol / L dilute hydrochloric acid to reverse the organic extraction after extraction. The stripping time is 30 min, the stripping temperature is 30°C, and the stripping rate is over 99%.

Embodiment 3

[0036] (1) to contain Ni 2+ The electroplating waste solution is the water phase, and the Ni in the water phase 2+ The concentration of the solution is 0.8 g / L, and the pH of the aqueous phase is 1.

[0037] (2) Using chloroform as the diluent, prepare 0.0565 mol / L HADMPPA as the organic phase.

[0038] (3) 10 mL of the aqueous phase and organic phase were mixed, the extraction time was 10 min, the extraction temperature was 35 °C, and the Ni in the raffinate was determined 2+ The concentration and extraction rate are shown in Table 2.

[0039] (4) Use 0.1mol / L dilute hydrochloric acid to reverse the organic extraction after extraction. The stripping time is 30 min, the stripping temperature is 30°C, and the stripping rate is over 99%.

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Abstract

The invention belongs to the technical field of extraction of metal and phosphonic acid extracting agents in recycled waste, and particularly relates to a method for extracting and recycling nickel from electroplating waste liquid by utilizing a diphosphoric acid extracting agent. Common acidic organophosphorus (phosphine) extracting agents are poor in effect of extracting nickel ions in electroplating waste liquid, and the extracting process is tedious in operation, and often needs saponification. According to the method, N, N-dodecylamine bis (methylenephosphinic acid) (DADMPPA), N, N-hexadecylamine bis (methylenephosphinic acid) (HADMPPA) and N, N-octadecylamine bis (methylenephosphinic acid) (OADMPPA) are adopted as extracting agents to extract nickel ions in the electroplating waste liquid. The method is short in extraction time, high in efficiency, easy to operate, small in pollution, and capable of achieving recovering of nickel in the electroplating waste liquid.

Description

technical field [0001] The invention belongs to the technical field of hydrometallurgy, and in particular relates to a method for extracting and recovering nickel from electroplating waste liquid. Background technique [0002] Nickel is an important non-ferrous metal and a strategic resource that plays an important role in the development of the national economy. In 2019, China's nickel ore resources ranked ninth in the world, with a total of about 7.84 million tons. However, with the rapid economic development, China has become the world's largest nickel consumer, and nickel reserves still cannot meet demand. With the continuous mining of primary mineral resources such as nickel, the phenomenon of resource depletion gradually appeared, and people began to pay attention to the development and utilization of secondary resources. [0003] Metal nickel is widely used in the electroplating industry due to its good corrosion resistance. Electroless nickel plating is a process i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B3/38C22B23/00
CPCC22B7/005C22B23/0453C22B3/3842Y02P10/20
Inventor 孙国新李玲徐成金赵奕铭
Owner UNIV OF JINAN
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