Method of measuring trace metals copper and zinc in nickel-cobalt solution

A technology of trace metals and determination methods, applied in the field of chemical analysis, can solve the problems of low content and ineffective detection, etc., and achieve the effect of simple process and accurate and reliable detection results

Active Publication Date: 2019-06-14
LANZHOU JINCHUAN NEW MATERIAL SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The source of metal copper and zinc in nickel and cobalt solutions may be environmental factors, or it may be caused by the wear and tear of related equipment in the production process. The content is low, and the conventional acid treatment method cannot effectively detect the trace metal copper in the metal state. zinc

Method used

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  • Method of measuring trace metals copper and zinc in nickel-cobalt solution
  • Method of measuring trace metals copper and zinc in nickel-cobalt solution

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A. Fix the water-based microporous filter membrane with a diameter of 50mm and a pore size of 0.8um on the cup filter, connect the filter to the vacuum pump, turn on the switch of the vacuum pump, and wash the filter membrane with 50mL of pure water.

[0019] B. Pour 500mL of cobalt nitrate solution into the cup filter, suction filter, make the filtrate all pass through the filter membrane, wash the filter membrane with pure water twice, each time with 10mL of water, so that the metal element in the cobalt nitrate solution remains in the filter membrane film.

[0020] C. Remove the microporous filter membrane from the cup filter and put it into a 200mL beaker, add ammonia water with a volume concentration of 20%, and heat at low temperature for 5 minutes to dissolve the metal copper and zinc on the microporous filter membrane. Filter with a 0.45um microporous membrane on the cup filter, wash the filter membrane with a small amount of water for 3 times, collect the filtr...

Embodiment 2

[0024] A. Fix the water-based microporous filter membrane with a diameter of 47mm and a pore size of 1.0um on the cup filter, connect the filter to the vacuum pump, turn on the switch of the vacuum pump, and wash the filter membrane with 50mL of pure water.

[0025] B. Pour 1000mL of nickel sulfate solution into the cup filter, suction filter, make the filtrate all pass through the filter membrane, wash the filter membrane with pure water 5 times, each time with 10mL of water, so that the metal element in the nickel sulfate solution remains in the filter. film.

[0026] C. Remove the microporous filter membrane from the cup filter and put it into a 200mL beaker, add ammonia water with a volume concentration of 80%, and heat at low temperature for 20min to dissolve the metal copper and zinc on the microporous filter membrane. Filter with a 0.30um microporous membrane on the cup filter, wash the filter membrane with a small amount of water for 6 times, collect the filtrate and w...

Embodiment 3

[0030] A. Fix the water-based microporous filter membrane with a diameter of 50mm and a pore size of 1.0um on the cup filter, connect the filter to the vacuum pump, turn on the switch of the vacuum pump, and wash the filter membrane with 50mL of pure water.

[0031] B. Pour 2000mL of the mixed solution of nickel sulfate and cobalt sulfate into the cup filter, filter with suction, make the filtrate pass through the filter membrane, wash the filter membrane with pure water 3 times, and use 10mL of water each time to make the nickel sulfate and cobalt sulfate The metal element in the mixed solution remains on the filter membrane.

[0032] C. Remove the microporous filter membrane from the cup filter and put it into a 200mL beaker, add ammonia water with a volume concentration of 50%, and heat at low temperature for 10 minutes to dissolve the metal copper and zinc on the microporous filter membrane. Filter the cup filter with a 0.30um microporous membrane, wash the filter membrane...

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Abstract

The invention discloses a method of measuring trace metals copper and zinc in a nickel-cobalt solution. The method comprises steps of filtering the nickel-cobalt solution by using a microporous membrane, so as to keep single metal element in the nickel-cobalt solution on the membrane; then, selectively dissolving metal copper, zinc or other alloy on the microporous membrane by using aqueous ammonia, so as to allow metals copper and zinc on the membrane to enter the solution; and then measuring copper and zinc in the solution by using atomic absorption spectroscopy or plasma spectroscopy, so asto obtain content of metals copper and zinc in the solution. The method is simple, can detect trace metals copper and zinc in a solution effectively, and delivers an accurate and reliable result; treated solution can be returned to the production line directly, so that the material is not wasted. The method is suitable for measuring trace metals copper and zinc in nickel sulfate, cobalt chloride,cobalt nitrate, cobalt sulfate and nickel-cobalt mixed solutions or nickel and cobalt-dominated metal mixed solutions.

Description

technical field [0001] The invention belongs to the technical field of chemical analysis, in particular to a method for determining trace metal copper and zinc in a nickel-cobalt solution for battery materials. Background technique [0002] Nickel solution can be used to make salt materials such as nickel sulfate or nickel hydroxide, and can also be used to make ternary oxides such as nickel-cobalt-manganese, nickel-cobalt-aluminum, etc. Cobalt solution can be used to make ternary oxides of tricobalt tetroxide or cobalt , these materials can be used to manufacture nickel-metal hydride batteries or lithium-ion batteries, nickel-metal hydride batteries or lithium-ion batteries have high requirements for metal foreign matter such as silver, copper, zinc, etc., exceeding the content range will lead to safety accidents, therefore, production The battery material company will monitor the entire production process for foreign matter, including the nickel solution and cobalt solutio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/31G01N21/73G01N21/72
Inventor 朱国忠徐艳燕喻生洁赵芙蓉马群郝凤梅闫克玉陈功媛吴雪琳孙瑞刘吉地
Owner LANZHOU JINCHUAN NEW MATERIAL SCI & TECH
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