Separating and recycling method for thallium in nickel-cobalt sulfate solution

A technology of separation and recovery of nickel and cobalt sulfate, applied in the direction of improving process efficiency, etc., can solve problems affecting the health of workers, affecting the extraction rate of thallium, environmental pollution, etc., and achieve low cost, improved extraction rate, and low operating conditions. Effect

Active Publication Date: 2018-04-13
清远先导材料有限公司
View PDF4 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, some organic solvents for extracting thallium, such as benzene, ether, toluene, isopropyl ether, and methyl isobutyl ketone, are volatile and toxic, causing environmental pollution and affecting the health of workers, and these extraction solvents are more expen

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Separating and recycling method for thallium in nickel-cobalt sulfate solution
  • Separating and recycling method for thallium in nickel-cobalt sulfate solution
  • Separating and recycling method for thallium in nickel-cobalt sulfate solution

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0054] Example 1

[0055] (1) Inject 1L of thallium-containing nickel cobalt sulfate solution into the beaker, control the temperature of the nickel cobalt sulfate solution to 25°C, turn on the stirring paddle, set the stirring speed to 340r / min, add NaOH solution to adjust the pH=1.5, and adjust After completion, add 2g of H with a mass concentration of 50% 2 O 2 The solution is oxidized for 30 minutes to obtain a reaction mixture solution.

[0056] (2) Add NaCl to the reaction mixture solution obtained in step (1), and the ratio of the amount of NaCl to the volume of the reaction mixture solution is 50g:1L. After stirring, add the extraction solvent (35% N 235 , 10% TBP, 55% sulfonated kerosene), extract according to O / A=1:1, set the stirring speed to 350r / min, stirring time 3min, standing for 10min, after standing for two-phase separation, respectively Organic phase containing thallium and raffinate (recovered nickel and cobalt).

[0057] (3) Add 6mol / L of NH to the thallium-cont...

Example Embodiment

[0063] Example 2

[0064] (1) Inject 1L of thallium-containing nickel cobalt sulfate solution into the beaker, control the temperature of the nickel cobalt sulfate solution to 25°C, turn on the stirring paddle, set the stirring speed to 340r / min, add NaOH solution to adjust the pH=1.5, and adjust After completion, add 2g of H with a mass concentration of 50% 2 O 2 The solution is oxidized for 30 minutes to obtain a reaction mixture solution.

[0065] (2) Add NaCl to the reaction mixture solution obtained in step (1). The ratio of the amount of NaCl added to the volume of the reaction mixture solution is 10g:1L. After stirring, add the extraction solvent (20%N 235 , 10% TBP, 70% sulfonated kerosene), extract according to O / A=1:1, set the stirring speed to 350r / min, stirring time 10min, standing for 10min, after standing for two-phase separation, respectively Organic phase containing thallium and raffinate (recovered nickel and cobalt).

[0066] (3) Add 6mol / L of NH to the thallium-co...

Example Embodiment

[0072] Example 3

[0073] (1) Inject 1L of thallium-containing nickel cobalt sulfate solution into the beaker, control the temperature of the nickel cobalt sulfate solution to 25℃, turn on the stirring paddle, set the stirring speed to 350r / min, add NaOH solution to adjust the pH=1.5, and adjust After completion, add 2g of H with a mass concentration of 50% 2 O 2 The solution is oxidized for 30 minutes to obtain a reaction mixture solution.

[0074] (2) Add NaCl to the reaction mixture solution obtained in step (1), the ratio of the amount of NaCl added to the volume of the reaction mixture solution is 25g:1L, after stirring, add the extraction solvent (5%N 235 , 10% TBP, 85% sulfonated kerosene), extract according to O / A=2:1, set the stirring speed to 350r / min, stirring time 30min, standing for 60min, after standing for two-phase separation, respectively Organic phase containing thallium and raffinate (recovered nickel and cobalt).

[0075] (3) Add 6mol / L of NH to the thallium-cont...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention provides a separating and recycling method for thallium in a nickel-cobalt sulfate solution. The separating and recycling method includes the following steps that a), the nickel-cobalt sulfate solution, a pH adjusting agent and an oxidizing agent are mixed for carrying out an oxidation reaction, and a reaction mixed solution is obtained; b), the reaction mixed solution obtained in the step a) and chlorate salt are mixed, then an extracting solvent is adopted for quenching, and after two phases are separated, an organic phase including thallium and raffinate are obtained, whereinthe extracting solvent is composed of tertiary amine, tributyl phosphate and sulfonated kerosene; and c), ammonia water is adopted for the organic phase including thallium for back extraction, and after the two phases are separated, thallium-containing back extracting liquid and a lean organic phase are obtained. Compared with the prior art, the extracting solvent containing tertiary amine is adopted in a breakthrough manner for extracting thallium under a sulfuric acid system, the thallium extracting rate is increased by controlling a specific technology, and therefore thallium can be thoroughly separated. In addition, by means of the separating and recycling method, pollution is avoided, the cost is low, and great economic benefits are achieved for comprehensive recycling of thallium.

Description

technical field [0001] The invention relates to the technical field of hydrometallurgy, in particular to a method for separating and recovering thallium in a nickel-cobalt sulfate solution. Background technique [0002] Thallium is widely used in aerospace, national defense, electronic communication, chemical industry, metallurgy and other fields, but the content of thallium is rare and highly dispersed. In addition, the toxicity of thallium is higher than that of arsenic and mercury, and in some chemical engineering, very low levels of thallium will affect the production process or product quality. For example, more than 0.1mg / L of thallium in zinc hydrometallurgy will cause problems such as corrosion of cathode plates and burnt plates during electrolysis. Therefore, in order to ensure that qualified products are produced, the solution must be purified to remove thallium in the nickel-cobalt sulfate solution (nickel sulfate, cobalt sulfate solution), which is beneficial to...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C22B3/40C22B61/00
CPCC22B61/00C22B3/409Y02P10/20
Inventor 刘鸿飞殷亮陈辉熊平朱刘
Owner 清远先导材料有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap