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Method for recovering sodium and/or potassium and separating vanadium from sodium orthovanadate and/or potassium orthovanadate

A technology of sodium orthovanadate and potassium orthovanadate, applied in the field of vanadium chemical metallurgy, can solve the problems of low vanadium yield and difficult control of vanadium precipitation process, and achieve high recovery rate, simple safety, and short process flow Effect

Inactive Publication Date: 2016-08-03
HEBEI IRON AND STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that it is difficult to control the vanadium precipitation process and the vanadium yield is low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A method for reclaiming sodium and separating vanadium from sodium orthovanate solution, said method comprising the steps of:

[0029] (1) batching: sodium orthovanadate is mixed with water, stirs, is made into the sodium orthovanadate solution that vanadium concentration is 28.56g / L, the concentration of sodium is 38.13g / L;

[0030] (2) Reaction: CO is introduced into the sodium orthovanadate solution 2 , reacted for 3 hours at a temperature of 90°C and a pressure of 1.2 MPa to obtain a reaction product;

[0031] (3) Filtration: the reaction product is filtered to obtain sodium carbonate and / or sodium bicarbonate crystals and a vanadium-containing solution;

[0032] (4) causticizing: sodium carbonate / sodium bicarbonate crystal is reacted with calcium hydroxide solution, after reaction finishes, filter and obtain calcium carbonate and sodium hydroxide solution, reclaim and utilize the sodium in sodium orthovanadate;

[0033] (5) Precipitation of vanadium: the pH of th...

Embodiment 2

[0037] A method for reclaiming sodium and separating vanadium from sodium orthovanate solution, said method comprising the steps of:

[0038] (1) batching: sodium orthovanadate is mixed with water, stirs, is made into the sodium orthovanadate solution that vanadium concentration is 45.56g / L, the concentration of sodium is 61.64g / L;

[0039] (2) Reaction: CO is introduced into the sodium orthovanadate solution 2 , reacted for 1.5h at a temperature of 120°C and a pressure of 2.5MPa to obtain a reaction product;

[0040] (3) Filtration: the reaction product is filtered to obtain sodium carbonate and / or sodium bicarbonate crystals and a vanadium-containing solution, and the sodium in sodium orthovanadate is reclaimed;

[0041] (4) Precipitation of vanadium: the pH value of the vanadium-containing solution is adjusted under heating conditions, and then filtered to obtain the vanadium-containing red cake and the solution after vanadium extraction. After the vanadium extraction, the...

Embodiment 3

[0044] A method for reclaiming sodium and separating vanadium from sodium orthovanate solution, said method comprising the steps of:

[0045] (1) batching: sodium orthovanadate is mixed with water, stirs, is made into vanadium concentration and is 35.08g / L, and the concentration of sodium is the sodium orthovanadate solution of 47.46g / L;

[0046] (2) Reaction: CO is introduced into the sodium orthovanadate solution 2 , at a temperature of 110°C and a pressure of 2.0 MPa, the reaction was carried out for 1 h to obtain the reaction product;

[0047] (3) Filtration: the reaction product is filtered to obtain sodium carbonate and / or sodium bicarbonate crystals and a vanadium-containing solution, and the sodium in sodium orthovanadate is reclaimed;

[0048] (4) Precipitation of vanadium: the pH of the vanadium-containing solution is adjusted under heating conditions. After the reaction, filter to obtain the vanadium-containing red cake product and the solution after vanadium extra...

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PUM

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Abstract

The invention provides a method for recovering sodium and / or potassium and separating vanadium from sodium orthovanadate and / or potassium orthovanadate. The method includes the steps that a sodium orthovanadate solution and / or a potassium orthovanadate solution and CO2 react under the conditions that the temperature is 50-150 DEG C and the pressure is 1.0-3.0 MPa, then solid-liquid separation is carried out to obtain carbonate and / or bicarbonate and a vanadium-containing solution, and positive ions in the carbonate and the bicarbonate are sodium ions and / or potassium ions. By means of the method, the vanadium recovery rate is high (higher than 98%), and the technological process is short, easy to operate, simple and good in safety; in the separation process, sodium and / or potassium in the sodium orthovanadate and / or the potassium orthovanadate are / is converted into crystals or alkaline solutions so as to be recycled.

Description

technical field [0001] The invention belongs to the technical field of vanadium chemical industry and metallurgy, and relates to a method for recovering sodium and / or potassium to separate vanadium from sodium orthovanadate and / or potassium orthovanadate, in particular to a method for utilizing sodium orthovanadate solution and / or orthovanadate Potassium vanadate solution with CO 2 The reaction recovers sodium and / or potassium in vanadate and separates vanadium. Background technique [0002] In view of the successful application of the sodium-based sub-molten salt chromium salt cleaning process, the Institute of Process Engineering, Chinese Academy of Sciences has successfully developed a new vanadium slag cleaning process using NaOH as the reaction medium. The high-value conversion of the intermediate product sodium vanadate has become a key research direction. The vanadium in the vanadium extraction leach solution by the sub-molten salt method mainly exists in the form o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B34/22C22B26/10C22B3/44
CPCC22B3/44C22B26/10C22B34/22Y02P10/20
Inventor 李兰杰周冰晶高明磊王海旭陈东辉白瑞国
Owner HEBEI IRON AND STEEL
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