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A kind of preparation method that can repeatedly remove cobalt ion resin in galvanizing electrolyte

A technology of cobalt ion and electrolyte, applied in the field of preparation of cobalt ion resin, can solve problems such as limiting the practical application of cobalt removal, and achieve the effects of high cobalt removal efficiency, high enrichment rate and simple preparation process

Inactive Publication Date: 2018-12-28
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The shortcomings of the above methods have limited their practical application in the removal of cobalt in galvanizing electrolytes

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] First weigh 1.2g of poly-p-hydroxystyrene and dissolve in 15mL DMSO; weigh 2.23g of 7-bromo-2-naphthol and add to the above solution to dissolve; secondly, accurately weigh 0.0412g of CuO and 0.0824g of NaOH in the rapid Stir and add to the above solution, react at a constant temperature of 100°C for 18 hours, extract three times with 3×15mL deionized water after the reaction is completed, evaporate the oil phase solvent at 50°C under reduced pressure, and obtain the initial product of the grafted resin .

[0029] Dissolve the above-mentioned grafted resin in 20mL of glacial acetic acid and deionized water at a ratio of 1:1, lower the temperature to 5°C, control the pH to about 3, and slowly add 1.5g of NaNO under rapid stirring 2 , After reacting for 1 h, the product was filtered and washed until the washing liquid was neutral, and then dried to obtain the product.

[0030] 5g of the above resin is used to absorb cobalt ions (cobalt ion concentration is 66mg / L) in the...

Embodiment 2

[0032] First, weigh 1.2g poly-m-hydroxystyrene and dissolve in 20mL DMF; weigh 4g of 8-iodo-2-naphthol and add to the above solution to dissolve; secondly, accurately weigh 0.0343g CuSO 4 and 0.0686g of Na 2 CO 3 Under rapid stirring, it was added to the above solution, and reacted at a constant temperature of 90°C for 25 hours. After the reaction was completed, it was extracted three times with 3×15mL deionized water, and the oil phase solvent was evaporated under reduced pressure at 50°C to obtain the grafted resin. initial product.

[0033] Dissolve the above-mentioned grafted resin in 30mL of glacial acetic acid and deionized water at a ratio of 1:2, lower the temperature to 0°C, control the pH to about 4, and slowly add 1.5g of CsNO under rapid stirring 2 , After reacting for 1 h, the product was filtered and washed until the washing liquid was neutral, and then dried to obtain the product.

[0034] 5g of the above resin is used to absorb cobalt ions (cobalt ion concen...

Embodiment 3

[0036] First, weigh 1.2g of poly-m-hydroxystyrene and dissolve it in 20mL of benzene; weigh 5g of 6-chloro-2-naphthol and add it to the above solution to dissolve; secondly, accurately weigh 0.0343g of CuI 2 and 0.0686g of NaOH were added to the above solution under rapid stirring, and reacted at a constant temperature of 120°C for 12h. After the reaction was completed, it was extracted three times with 3×15mL deionized water, and the oil phase solvent was evaporated under reduced pressure at 50°C to obtain Primary resin product after grafting.

[0037] Dissolve the above-mentioned grafted resin in 40mL of glacial acetic acid and deionized water 1:2 solution, lower the temperature to -6°C, control the pH = about 2, and slowly add 1.6g of KNO under rapid stirring 2 , After reacting for 1h, filter and wash with suction until the lotion is neutral, dry and obtain the product.

[0038] 5g of the above resin is used to absorb cobalt ions (cobalt ion concentration is 66mg / L) in the...

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PUM

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Abstract

The invention discloses a preparation method of resin capable of repeatedly removing cobalt ions from a zinc plating electrolyte. The method is characterized in that halogen substituted 2-isonaphthol and hydroxy substituted polrvinyl benzene are taken as the raw materials, so that solid-supported grafted polystyrene resin is obtained through a series of reaction. Experimental results show that the solid-supported grafted polystyrene prepared by adopting the preparation method has an efficient enrichment effect on trace cobalt elements in the zinc plating electrolyte under an acidic condition, cobalt elements enriched on the resin can realize efficient desorption under an alkaline condition, and therefore the efficient reuse of the resin is realized; besides, the raw materials for the preparation method are low in cost and easy to obtain, the enrichment amount of cobalt elements in the zinc plating electrolyte is large, the efficient desorption of cobalt elements is realized, the enrichment and desorption conditions are simple, and the enrichment and desorption effects are obvious.

Description

technical field [0001] The invention relates to a preparation method for repeatedly removing cobalt ion resin in galvanizing electrolyte, belonging to the technical field of material preparation. Background technique [0002] Zinc hydrometallurgy is the most important zinc smelting method in the world, and its output accounts for 80% to 85% of the total zinc output, and it shows a growing trend with the development of technology. After zinc roasted ore is leached, zinc enters in the form of ions. into the solution, but other impurities, such as cobalt and other elements, also enter the zinc sulfate leaching solution. If the content of these impurities is too high, it will have a great impact on the technical and economic indicators of zinc electrowinning and the quality of electrolytic zinc. The process cannot proceed normally. [0003] At present, the removal methods of cobalt element in galvanized electrolyte mainly include the following several methods: (1) zinc powder r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B3/24
CPCC22B3/22Y02P10/20
Inventor 阳卫军赵昊良秦明高周元蓉
Owner HUNAN UNIV
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