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Method for extracting vanadium from vanadium-precipitated wastewater through microemulsion

The technology of vanadium precipitation wastewater and microemulsion is applied in the field of vanadium recovery and utilization, which can solve the problems of long ion exchange reaction time, reduced production efficiency and high product purity, and achieves the effects of being beneficial to recovery, easy operation and simple process flow

Inactive Publication Date: 2017-12-22
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Gao Guanjin and others used sodium sulfate transformed D201 anion exchange resin to extract vanadium. This method is low in cost and high in product purity, but the ion exchange reaction time is long, which reduces production efficiency.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Adjust the pH of 500mL solution containing pentavalent vanadium (1.0 g / L) to 6.2 with HCl or NaOH; add 1.2g N263 and 3.0mL isoamyl alcohol to 12.3mL n-heptane, stir to mix evenly to obtain an organic phase; Then slowly add a mixed solution of 0.5mol / L NaOH and 0.5mol / L NaCl dropwise to the organic phase, the amount of water to increase volume is 0.3mL, stir to make it evenly mixed, let it stand, after clarification, the mixed solution is separated, and the upper phase is obtained Saturated W / O microemulsion; mix the microemulsion and vanadium precipitation wastewater at a volume ratio of 1:4, stir for 5 minutes, the extraction temperature is 27°C, and the stirring intensity is 200r / min; then the mixed solution is left to separate and the lower layer of water is released phase, detect the concentration of vanadium, and calculate the concentration of vanadium in the organic phase with the material balance algorithm. After calculation, the extraction rate of vanadium is 94....

Embodiment 2

[0021] 500mL solution containing pentavalent vanadium (1.0 g / L) was adjusted to pH 6.2 with HCl or NaOH. Add 1.2g of N263 and 3.0mL of isoamyl alcohol into 12.3mL of n-heptane, stir to mix evenly to obtain an organic phase; then slowly drop a mixed solution of 0.5mol / L NaOH and 0.5mol / L NaCl into the organic phase , the amount of water to increase volume is 0.3mL, stir to make it evenly mixed, let it stand, and after clarification, the mixed liquid is separated into phases, and the upper phase is taken to obtain a saturated W / O microemulsion; mix the microemulsion with the vanadium precipitation wastewater at a volume ratio of 1:3 , stirred for 5 minutes, the extraction temperature was 27°C, and the stirring intensity was 200r / min; then the mixed solution was allowed to stand for stratification, and the lower aqueous phase was released to detect the concentration of vanadium, and the concentration of vanadium in the organic phase was calculated by the material balance algorithm...

Embodiment 3

[0023] 500mL solution containing pentavalent vanadium (1.0 g / L) was adjusted to pH 6.2 with HCl or NaOH. Add 1.2g of N263 and 3.0mL of isoamyl alcohol into 12.3mL of n-heptane, stir to mix evenly to obtain an organic phase; then slowly drop a mixed solution of 0.5mol / L NaOH and 0.5mol / L NaCl into the organic phase , the amount of volume-increasing water is 0.3mL, stir to make it evenly mixed, let it stand, and after clarification, the mixed liquid is separated into phases, and the upper phase is taken to obtain a saturated W / O microemulsion; the microemulsion and the vanadium precipitation wastewater are mixed in a volume ratio of 1:2 , stirred for 5 minutes, the extraction temperature was 27°C, and the stirring intensity was 200r / min; then the mixed solution was allowed to stand for stratification, and the lower aqueous phase was released to detect the concentration of vanadium, and the concentration of vanadium in the organic phase was calculated by the material balance algor...

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Abstract

The invention discloses a method for extracting vanadium from vanadium-precipitated wastewater through microemulsion. The method comprises the following steps: collecting vanadium-precipitated wastewater, and regulating the pH of the vanadium-precipitated wastewater to be 6.0-7.0; adding quaternary ammonium salt N236 and isoamyl alcohol to n-heptane, and stirring to uniformly mix to obtain an organic phase; slowly dropwise adding a mixed solution of NaOH and NaCl to the organic phase; stirring to uniformly mix; standing, wherein the mixed solution is subjected to phase separation after being clarified; collecting the upper phase to obtain saturated W / O microemulsion; mixing the W / O microemulsion and the vanadium-precipitated wastewater, and stirring for a certain time; then standing to layer the mixed solution; collecting the lower water phase; detecting the concentration of vanadium; and calculating the concentration of the organic-phase vanadium through a material balance method, thus calculating the extracting rate. With the adoption of the method, vanadium element in the vanadium-precipitated wastewater can be efficiently and quickly recovered.

Description

technical field [0001] The invention relates to the technical field of vanadium recovery and utilization, more specifically, relates to a method for extracting vanadium from vanadium precipitation wastewater by using microemulsion. Background technique [0002] Vanadium is an important resource, mainly used in steel, battery, medicine, chemical industry and other fields. my country's vanadium-titanium magnetite is rich in mineral content, so vanadium slag extraction method is currently the mainstream vanadium extraction process, and vanadium slag is used as a subsequent vanadium extraction raw material. The vanadium slag is roasted to obtain soluble vanadate, and then the corresponding solvent is used for leaching. Vanadium-containing leaching solution is subjected to vanadium-precipitation treatment to obtain vanadium-containing wastewater with a lower concentration of vanadium. Vanadium in vanadium precipitation wastewater is both a valuable metal and a toxic substance, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B34/22C22B3/28
CPCC22B7/006C22B34/22C22B3/288Y02P10/20
Inventor 李鸿乂郭赟杨阳谢兵
Owner CHONGQING UNIV
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