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A method for recovering nickel from ammoniacal nickel-containing wastewater

A nickel wastewater and ammoniacal technology, applied in the field of nickel recovery from ammoniacal nickel-containing wastewater, can solve the problems of large reagent consumption, high cost, and difficult separation, and achieve the effect of efficient extraction, low cost, and efficient recovery

Active Publication Date: 2018-01-05
中科博一环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in a high-concentration ammonia environment, the complexation of low-level nickel and ammonia is very tight, and it is extremely difficult to separate
The existing technology usually adopts the traditional method of adding a large amount of alkali to further precipitate nickel, which consumes a lot of reagents, costs high, and has little effect

Method used

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  • A method for recovering nickel from ammoniacal nickel-containing wastewater
  • A method for recovering nickel from ammoniacal nickel-containing wastewater
  • A method for recovering nickel from ammoniacal nickel-containing wastewater

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Embodiment 1

[0032] A method of reclaiming nickel from ammoniacal nickel-containing wastewater of the present invention comprises the following steps: get 300mL of ammoniacal nickel-containing wastewater (composition: the total ammonia content is 12.0g / L, the content of nickel is 100ppm, and the pH is 12.5 ), the above-mentioned ammoniacal nickel-containing waste water is divided into 3 parts on average, and each part of 100mL is poured into three separatory funnels with a volume of 250mL (numbering is 1#, 2#, 3# successively); measure the extractant (The main component is 2-hydroxy-5-nonylacetophenone oxime, the same below) 1mL, add 9mL sulfonated kerosene to make 10mL of organic phase with a volume ratio (v / v) of 10%, and pour it into 1# liquid funnel; measure 1.5 mL of extractant, add 8.5 mL of sulfonated kerosene to form 10 mL of organic phase with a volume ratio (v / v) of 15%, and pour it into 2# separating funnel; measure 2 mL of extractant, Add 8 mL of sulfonated kerosene to form 10 ...

Embodiment 2

[0034]A method for reclaiming nickel from ammoniated nickel-containing waste water of the present invention comprises the following steps: get extractant 6mL, add 24mL sulfonated kerosene to make volume ratio (v / v) be 20% organic phase 30mL, make above-mentioned The organic phase is divided into three parts on average, each part is 10mL, and poured into 4#, 5#, 6# separating funnels with a volume of 250mL respectively; measure 100mL of ammoniacal nickel-containing wastewater (composition: the total ammonia content is 8.0g / L, the content of nickel is 150ppm, pH is 10.5) pour in 4# separatory funnel, measure the above-mentioned ammoniacal nickel-containing waste water of 150mL and pour in 5# separatory funnel, and measure this ammoniacal nickel-containing waste water of 200mL Nickel wastewater was poured into 6# separating funnel. That is, the organic phase in the 4#, 5#, and 6# separating funnels is compared with the water phase (O / A) in order of 1:10, 1:15 and 1:20. Put all ...

Embodiment 4

[0038] A method for reclaiming nickel from ammoniated nickel-containing waste water of the present invention comprises the following steps: get extractant 5mL, add 45mL sulfonated kerosene to make volume ratio (v / v) be 10% organic phase 50mL, pour into In a 11# separating funnel with a volume of 1000mL; measure 500mL of ammoniacal nickel-containing wastewater (composition: total ammonia content is 9.0g / L, nickel content is 80ppm, pH is 13.0) and poured into the above-mentioned separating funnel. Put the separatory funnel into a shaker, set the temperature of the shaker to 25°C, and shake for 5 minutes. After the shaking table was stopped, let it stand for stratification and phase separation. The nickel content in the aqueous phase was tested by ICP, and the result was 3.1 ppm; the nickel content in the nickel-containing organic phase was calculated to be 0.797g / L. Take 10mL, 15mL and 20mL of the above-mentioned organic phase in three batches, and pour them into 12#, 13#, 14# s...

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Abstract

The invention discloses a method for recovering nickel from ammoniacal nickel-containing wastewater, which comprises the following steps: (1) using ammoniacal nickel-containing wastewater as the water phase, using an extractant and its diluent as the organic phase, and passing liquid-liquid After the extraction, the nickel in the aqueous phase is extracted into the organic phase to obtain a nickel-containing organic phase and a raffinate. The main chemical component of the extractant is 2-hydroxyl-5-nonylacetophenone oxime, and the obtained raffinate is Ammonia-containing wastewater; (2) back-extracting the nickel-containing organic phase obtained in step (1) with a sulfuric acid solution to obtain a nickel-sulfate-containing stripping solution and a regenerated organic phase, which completes the recovery of nickel in the ammoniacal nickel-containing wastewater. The method has the advantages of high extraction efficiency, simple operation method, mild conditions, recyclable extractant, and easy industrial application.

Description

technical field [0001] The invention relates to the technical fields of hydrometallurgy, wastewater treatment and resource recycling, in particular to a method for recovering nickel from ammoniacal nickel-containing wastewater. Background technique [0002] In 2016, my country's annual output of new energy vehicles exceeded 450,000, making it the world's largest producer and seller of new energy vehicles. The core component "power battery" of new energy vehicles usually uses lithium-ion batteries or nickel-metal hydride batteries. The positive electrode material of Ni-MH battery is Ni(OH) 2 . The precursors of cathode materials for power lithium-ion batteries mainly include Ni 8 / 10 co 1 / 10 mn 1 / 10 (OH) 2 and Ni 5 / 10 co 3 / 10 mn 2 / 10 (OH) 2 , its market demand exceeds supply. In 2016, the total output of the above three materials in my country reached more than 20,000 tons. The production process of this type of material is mainly synthesized by liquid phase prec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B23/00C22B7/00C22B3/30
CPCC22B7/006C22B23/0453C22B3/30Y02P10/20
Inventor 黄国勇郭学益田庆华李栋
Owner 中科博一环保科技有限公司