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Extraction agent composition, application thereof and method for recycling active component in solution

An active component and extractant technology, which is applied in the field of extractant composition and its application and recovery of active components in solution, can solve the problems of complex process, narrow application range, inconsistent vanadium state, etc., and achieves simple equipment and process, Wide application range and high adaptability

Inactive Publication Date: 2019-09-10
CHNA ENERGY INVESTMENT CORP LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

CN102888512A discloses a method for purifying vanadium, including adding an oxidizing agent to the vanadium solution to make Fe 2+ Oxidized to Fe 3+ , to remove Fe impurities, but for other impurity ions such as Si, Al 3+ , Ca 2+ , Mg 2+ , K + and Na + There is no removal ability, and the obtained product is solid vanadate, which is not suitable for removing impurities in the active replenishing liquid. The technical solution involved in this application requires the concentration of vanadium in the vanadium-containing solution to be 15-35g / L, and the application range is narrow
Use vanadium extractant from VOSO in CN104357658A 4 Vanadium is extracted from the solution, and sulfuric acid is used for stripping to obtain a vanadium-rich stripping solution. Ammonium salts are added to the stripping solution to precipitate vanadium. Versatility
In CN104862485A, a tungsten extractant is used to extract the vanadium-tungsten solution. Vanadium and tungsten enter the raffinate and the organic phase respectively. The vanadium-rich raffinate is reprocessed to obtain vanadium pentoxide, and the tungsten-rich organic phase is stripped and purified to obtain ammonium paratungstate , but the literature does not disclose the method of reprocessing
Both CN104357658A and CN104862485A can only extract vanadium or tungsten from vanadium solution or vanadium-tungsten solution. If vanadium and tungsten are to be extracted at the same time, extraction-back extraction is required twice, and the process is complicated

Method used

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  • Extraction agent composition, application thereof and method for recycling active component in solution
  • Extraction agent composition, application thereof and method for recycling active component in solution

Examples

Experimental program
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Embodiment 1

[0039] This embodiment is used to illustrate that the present invention provides extractant and the method for active component in recovery solution

[0040] The denitrification catalyst deactivation active supplement liquid that certain regeneration plant provides, its main component is 0.7% by weight ammonium metavanadate (in V 2 o 5 In terms of), 1.3% by weight of ammonium metatungstate (in terms of WO 3 meter), the pH is 8.5.

[0041] ① Discharge the exhausted active supplement solution into the sedimentation tank for natural settlement for 12 hours;

[0042] ②Filter the supernatant of the naturally settled active replenishing liquid and discharge it into the extraction and separation tank with high-pressure air stirring function, and add dilute sulfuric acid to adjust the pH to 4.5;

[0043] 3. Add extractant in the separation tank, the extractant composition is 5% by weight of N1923, 5% by weight of tributyl phosphate (TBP), 5% by weight of 2-octanol and 85% by weight...

Embodiment 2

[0049] This embodiment is used to illustrate that the present invention provides extractant and the method for active component in recovery solution

[0050] The denitrification catalyst deactivation active supplement liquid that certain regeneration plant provides, its main component is 1.2% by weight ammonium metavanadate (in V 2 o 5 In terms of), 2.1% by weight of ammonium metatungstate (in terms of WO 3 meter), the pH is 8.5.

[0051] ②The exhausted active replenishment solution is discharged into the sedimentation tank for natural settlement for 10 hours;

[0052] ②Filtrate the supernatant of the naturally settled active replenishing liquid and discharge it into the extraction and separation tank with high-pressure air stirring function, and add dilute hydrochloric acid to adjust the pH to 4.0;

[0053] 3. Add extractant in the separation tank, the extractant composition is 10% by weight N1923, 10% by weight tributyl phosphate (TBP), 10% by weight 2-octanol and 70% by ...

Embodiment 3

[0059] This embodiment is used to illustrate that the present invention provides extractant and the method for active component in recovery solution

[0060] The denitrification catalyst failure active supplement liquid that certain regenerating plant provides, its main component is 0.8% by weight ammonium metavanadate (in V 2 o 5 ), 1.0% by weight ammonium heptamolybdate (as MoO 3 meter), the pH is 8.3.

[0061] ① Discharge the exhausted active supplement solution into the sedimentation tank for natural settlement for 8 hours;

[0062] ②Filtrate the supernatant liquid of the naturally settled active replenishing liquid and discharge it into the extraction and separation tank with high-pressure air stirring function, and add dilute sulfuric acid to adjust the pH to 3.5;

[0063] 3. Add extractant in the separation tank, the extractant composition is 10% by weight N1923, 10% by weight tributyl phosphate (TBP), 10% by weight 2-octanol and 70% by weight sulfonated kerosene, th...

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Abstract

The invention relates to the technical field of denitrification catalyst recycling, and discloses an extraction agent composition, application thereof and a method for recycling an active component inthe solution. The extraction agent composition comprises alkylamine, a neutral phosphine extraction agent, high alcohols and sulfonated kerosene. The method for recycling the active component in thesolution comprises the steps that the solution with pH being 2 to 7 is in contact with the extraction agent, and the active component is extracted to obtain extraction liquid; the extraction liquid makes contact with ammonium hydroxide to carry out reverse extraction on the active component, and a reverse extraction liquid containing the active component is obtained; and the active component is selected from one of vanadium, tungsten and molybdenum. The beneficial effects that impurities and the active component are separated at a time, and adaptability is high; the recycling rate of the active component is high; the concentration requirement for the active component in the solution is low, and the wider application range is achieved; and the extraction agent composition obtained after reverse extraction can be recycled, one-time investment is achieved, cost is low, and needed equipment and process are very simple are achieved.

Description

technical field [0001] The present invention relates to the technical field of resource utilization of denitrification catalysts, in particular to an extractant composition and its use in recovering active components in a solution containing at least one of vanadium, tungsten and molybdenum as active components. application, and a method for recovering active components in a solution containing at least one of vanadium elements, tungsten elements and molybdenum elements as active components. Background technique [0002] At present, my country's energy structure is still dominated by coal. During the combustion of coal, a large amount of nitrogen oxides (NOx) will be emitted, causing serious regional environmental pollution such as haze and acid rain, and causing harm to human health and life. As of the first half of 2015, the capacity of thermal power denitrification units that have been put into operation is about 750 million kilowatts. According to the initial installati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B34/22C22B34/34C22B34/36C22B3/40C22B7/00
CPCC22B7/006C22B34/225C22B34/345C22B34/365C22B3/409Y02P10/20
Inventor 马静王宝冬刘子林马子然马少丹何发泉林德海徐文强周佳丽李歌李永龙孙琦
Owner CHNA ENERGY INVESTMENT CORP LTD
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