Unlock instant, AI-driven research and patent intelligence for your innovation.

Iron removing method for pickle liquor during extraction of vanadium in stone coal

An acid leaching solution and stone coal technology, applied in the field of iron ion removal, can solve the problems of high reaction conditions and high investment costs, and achieve the effects of strong selectivity, less environmental pollution and reduced consumption.

Inactive Publication Date: 2011-05-25
BEIJING UNIV OF CHEM TECH
View PDF1 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method requires higher reaction conditions and higher investment costs

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Use concentrated sulfuric acid at 90°C to continuously leaching stone coal for 8-10 hours, filter out solid impurities to obtain an acid leaching solution, adjust the pH value of the acid leaching solution to 2.00±0.02 with ammonia water, and the iron ion concentration is 0.206g at this time ·L -1 , vanadium ion concentration 0.066g L -1 .

[0021] Pipette 15.00mL of the liquid to be extracted, add 10mL of monooctyl phosphate and 2.0mL of kerosene as the extraction agent, and perform extraction. The contact time during extraction is 4 minutes, and the standing time is 3 minutes. Separate the acid leaching solution to be extracted vanadium, and then use 2mol L -1 The dilute sulfuric acid is used to back-extract the iron ions in the mixed extractant, which is used to extract another batch of acid leaching solution.

[0022] After extraction, the iron ion concentration in the vanadium solution was measured to be 0.051g L -1 , the concentration of iron ions decreased by...

Embodiment 2

[0024] Use concentrated sulfuric acid at 90°C to continuously leaching stone coal for 8 to 10 hours, filter out solid impurities to obtain an acid leaching solution, adjust the pH value of the acid leaching solution to 2.30±0.02 with ammonia water, and the concentration of iron ions at this time is 0.223g ·L -1 , vanadium ion concentration 0.074g L -1 .

[0025] Pipette 15.00 mL of the liquid to be extracted, add 10 mL of monobutyl phosphate, and 2.0 mL of kerosene as extraction agents for extraction. The contact time during extraction was 5 minutes, and the standing time was 4 minutes. The vanadium solution in the lower layer was separated, and 2mol·L -1 The dilute sulfuric acid will extract the iron ions in the mixed extractant.

[0026] After extraction, the iron ion concentration in the vanadium solution was measured to be 0.072g L -1 , the concentration of iron ions decreased by 67.7%, and the loss rate of vanadium was 22.6%.

Embodiment 3

[0028] Use concentrated sulfuric acid at 90°C to continuously leaching stone coal for 8-10 hours, filter out solid impurities to obtain an acid leaching solution, adjust the pH value of the acid leaching solution to 2.40±0.02 with ammonia water, and the concentration of iron ions at this time is 0.238g ·L -1 , vanadium ion concentration 0.079g L -1 .

[0029] Pipette 50.00 mL of the liquid to be extracted, add 15 mL of monohexyl phosphate and 2.5 mL of kerosene as extraction agents for extraction. The contact time during extraction is 4 minutes, and the standing time is 5 minutes. The vanadium solution in the lower layer was separated, and 2mol·L -1 The dilute sulfuric acid will extract the iron ions in the mixed extractant.

[0030] After extraction, the iron ion concentration in the vanadium solution was measured to be 0.078g L -1 , the concentration of iron ions decreased by 67.2%, and the loss rate of vanadium was 22.1%.

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 discloses an iron removing method for pickle liquor during extraction of vanadium in stone coal, which comprises the following steps: adjusting the pH value of the pickle liquor by ammonia water to a proper range as liquor to be extracted, and then extracting the liquor to be extracted by using mixed extracting agent, wherein the mixed extracting agent is a mixture of kerosene and Pextracting agent which is one or more of phosphoric acid-butyl esters, phosphoric acid-monooctyl ester, phosphoric acid-decoyl ester and citric acid. After the extraction is finished, iron ions in the mixed extracting agent are back extracted by dilute sulphuric acid so that the extracting agent can be recycled. After the extraction, the concentration of the iron ions in the pickle liquor can be reduced by 65 to 82 percent. The method has strong selectivity; at the same time of removing the iron ions, the loss rate of the vanadium is relatively low; the extracting agent of the vanadium duringthe vanadium extraction is not easy to poison and can be used for a long term; and the consumption of P204 is reduced. The method has the advantages of simple and convenient operation and little environment pollution, and can be applied in industry after the project is mature.

Description

technical field [0001] The invention relates to a method for removing iron ions, in particular to a method for iron ions in acid leaching solution after vanadium is extracted in the process of extracting vanadium from stone coal. technical background [0002] At present, the process of vanadium extraction from stone coal in industry mostly adopts the technological process of acid leaching vanadium-extracting vanadium-stripping vanadium-precipitating vanadium-calcining vanadium. When acid leaching vanadium, it is generally chosen to continuously leaching stone coal with sulfuric acid at 90°C for 8 to 10 hours to obtain the acid leaching solution during the vanadium extraction process. The acid leaching solution contains a large amount of iron ions in addition to vanadium. When extracting vanadium, a new method of extracting vanadium is often used: a mixture of tributyl phosphate (TBP) and di-2 ethylhexyl phosphoric acid (ie P204) is selected as the extraction agent, and a der...

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
Patent Type & Authority Patents(China)
IPC IPC(8): C22B3/40C22B34/22
CPCY02P10/20
Inventor 金鑫张丹
Owner BEIJING UNIV OF CHEM TECH