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A pressurized fluid extraction system and method for removing metal ions from carbon materials

A technology of pressurized fluid and metal ions, applied in the direction of material excitation analysis, solid solvent extraction, preparation of test samples, etc., can solve the problem of using a large amount of removal effect, achieve the effect of improving efficiency and reducing the number of operations

Active Publication Date: 2021-04-06
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In view of the above analysis, the embodiment of the present invention aims to provide a pressurized fluid extraction system and method for removing metal ions in carbon materials, to solve the need for repeated cleaning in existing removal methods and to use a large amount of acid-containing cleaning solution and simultaneously remove The technical problem of poor removal effect for multiple metal ions

Method used

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  • A pressurized fluid extraction system and method for removing metal ions from carbon materials
  • A pressurized fluid extraction system and method for removing metal ions from carbon materials
  • A pressurized fluid extraction system and method for removing metal ions from carbon materials

Examples

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Effect test

Embodiment 1

[0051] Step 1. The carbon material raw material is pre-oxidized in air at 420°C for 10 minutes, and cooled to room temperature in nitrogen;

[0052] Step 2, 100 grams of pre-oxidized carbon material raw material and 150 mesh quartz sand are mixed according to the mass ratio of 1:1, and then put into the pressurized fluid extraction pipe 5;

[0053] Step 3. Heat the extraction unit to 100°C. The first pressurized pump 2 injects the eluent 1 into the extraction unit at a working pressure of 5.0 MPa. The time for a single pressurized extraction is 10 minutes, and the eluent is injected 5 times in 1 minute. In extraction tube 5;

[0054] Step 4, the eluent 1 is a polyacrylic acid solution with a concentration of 0.5wt%, and the average molecular weight of polyacrylic acid is 3000. The extracted unit after treatment is injected with deionized water under the same working conditions as in step 3, and the single cleaning time The cleaning time is 8 minutes, and the cleaning times ar...

Embodiment 2

[0059] Step 1, the activated carbon sample is pre-oxidized by heating in air (treatment conditions are as shown in Table 2), and cooled to room temperature in nitrogen;

[0060] Step 2. Mix 100 grams of pre-oxidized carbon material raw materials with 150 mesh quartz sand in a mass ratio of 1:1 and put them into the pressurized fluid extraction tube 5;

[0061] Step 3. The extraction unit is heated to 100°C, and the first pressurized pump 2 injects the eluent 1 into the extraction unit at a working pressure of 5.0 MPa. The time for a single pressurized extraction is 10 minutes, and the eluent 1 can be pressurized and injected in 5 times ;

[0062] Step 4. The eluent 1 is a polyacrylic acid solution with a concentration of 0.5 wt%, and the average molecular weight of the polyacrylic acid is 3000. The treated extraction unit was injected with deionized water for cleaning under the same working conditions, and the single cleaning time was 8 minutes, and the cleaning times were 3 ...

Embodiment 3

[0067] Step 1. Pre-oxidize the raw materials by heating in air at 420°C for 10 minutes, and cool to room temperature in nitrogen;

[0068] Step 2. Mix 100 grams of pre-oxidized carbon material raw materials with 150 mesh quartz sand at a mass ratio of 1:1 and put them into the pressurized fluid extraction pipe 5 .

[0069] Step 3. The extraction unit is heated to the working temperature, and the first booster pump 2 injects the eluent 1 into the extraction unit according to the working pressure (the extraction operating conditions are shown in Table 3).

[0070] Step 4, the eluent 1 is a polyacrylic acid solution with a concentration of 0.5%, and the average molecular weight of the polyacrylic acid is 3000. The treated extraction unit was injected with deionized water for cleaning under the same working conditions, and the single cleaning time was 8 minutes, and the cleaning times were 3 times. Afterwards, nitrogen gas is introduced to remove the liquid, the solid material is...

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Abstract

The invention relates to a pressurized fluid extraction system and method for removing metal ions in carbon materials, which belongs to the technical field of new energy materials, and solves the problem that the existing removal method needs to use a large amount of acid-containing cleaning solution and the removal effect is poor when removing various metal ions The problem. The pressurized fluid extraction method of the present application includes: step 1, pre-oxidizing the carbon material raw material and cooling it to room temperature in a nitrogen atmosphere; step 2, mixing the pre-oxidized carbon material raw material with quartz sand to form a solid material, and loading the pressurized fluid In the extraction unit of the extraction system; step 3, heat the extraction unit to the working temperature, inject the eluent into the extraction unit for pressurized extraction operation; step 4, inject deionized water into the extraction unit under the same working conditions, and pass Nitrogen gas is added to remove the liquid, and finally a carbon material with trace metal ions removed is obtained. This application avoids the use of a large amount of acid-containing cleaning solution, reduces the number of repeated cleaning operations, and achieves the removal of various metal ion contents to a very low level.

Description

technical field [0001] The invention relates to the technical field of new energy materials, in particular to a pressurized fluid extraction system and method for removing metal ions in carbon materials. Background technique [0002] With the rapid growth of human society's consumption of fossil resources and energy, various environmental and sustainable development issues have become increasingly prominent. The development of renewable energy and efficient energy storage management technologies can effectively deal with these problems in the future. High-performance electrochemical energy storage systems, such as rechargeable batteries and supercapacitors, will be widely used in various industrial and social economic systems. [0003] With the development of new energy, the research and development of high-performance new energy materials has become an important key breakthrough direction. Among them, new carbon-based materials occupy an important position in the developm...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D11/02G01N21/73G01N1/44H01M4/583H01G11/36B82Y40/00
CPCB01D11/02B82Y40/00G01N1/44G01N21/73H01G11/36H01M4/583Y02E60/10
Inventor 李峰波袁国卿宋延林
Owner INST OF CHEM CHINESE ACAD OF SCI
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