CN113307269A - Method for preparing carbon dioxide after purification of liquid carbon dioxide - Google Patents
Method for preparing carbon dioxide after purification of liquid carbon dioxide Download PDFInfo
- Publication number
- CN113307269A CN113307269A CN202110685720.6A CN202110685720A CN113307269A CN 113307269 A CN113307269 A CN 113307269A CN 202110685720 A CN202110685720 A CN 202110685720A CN 113307269 A CN113307269 A CN 113307269A
- Authority
- CN
- China
- Prior art keywords
- carbon dioxide
- purification
- parts
- liquid carbon
- gas cylinder
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 title claims abstract description 370
- 239000001569 carbon dioxide Substances 0.000 title claims abstract description 185
- 229910002092 carbon dioxide Inorganic materials 0.000 title claims abstract description 185
- 238000000746 purification Methods 0.000 title claims abstract description 78
- 239000007788 liquid Substances 0.000 title claims abstract description 60
- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000003860 storage Methods 0.000 claims abstract description 16
- 238000011049 filling Methods 0.000 claims abstract description 8
- 238000002309 gasification Methods 0.000 claims abstract description 8
- 239000006200 vaporizer Substances 0.000 claims abstract description 8
- 239000004760 aramid Substances 0.000 claims description 22
- 229920003235 aromatic polyamide Polymers 0.000 claims description 22
- 150000007974 melamines Chemical class 0.000 claims description 22
- 238000003756 stirring Methods 0.000 claims description 18
- 238000003556 assay Methods 0.000 claims description 11
- 238000001514 detection method Methods 0.000 claims description 11
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 10
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 10
- 229910021389 graphene Inorganic materials 0.000 claims description 10
- CBCKQZAAMUWICA-UHFFFAOYSA-N 1,4-phenylenediamine Chemical compound NC1=CC=C(N)C=C1 CBCKQZAAMUWICA-UHFFFAOYSA-N 0.000 claims description 9
- JRBJSXQPQWSCCF-UHFFFAOYSA-N 3,3'-Dimethoxybenzidine Chemical compound C1=C(N)C(OC)=CC(C=2C=C(OC)C(N)=CC=2)=C1 JRBJSXQPQWSCCF-UHFFFAOYSA-N 0.000 claims description 9
- HLBLWEWZXPIGSM-UHFFFAOYSA-N 4-Aminophenyl ether Chemical compound C1=CC(N)=CC=C1OC1=CC=C(N)C=C1 HLBLWEWZXPIGSM-UHFFFAOYSA-N 0.000 claims description 9
- PIICEJLVQHRZGT-UHFFFAOYSA-N Ethylenediamine Chemical compound NCCN PIICEJLVQHRZGT-UHFFFAOYSA-N 0.000 claims description 9
- 229920000877 Melamine resin Polymers 0.000 claims description 9
- FDQSRULYDNDXQB-UHFFFAOYSA-N benzene-1,3-dicarbonyl chloride Chemical compound ClC(=O)C1=CC=CC(C(Cl)=O)=C1 FDQSRULYDNDXQB-UHFFFAOYSA-N 0.000 claims description 9
- XGZVUEUWXADBQD-UHFFFAOYSA-L lithium carbonate Chemical compound [Li+].[Li+].[O-]C([O-])=O XGZVUEUWXADBQD-UHFFFAOYSA-L 0.000 claims description 9
- 229910052808 lithium carbonate Inorganic materials 0.000 claims description 9
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 claims description 9
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical class CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 claims description 8
- 238000003760 magnetic stirring Methods 0.000 claims description 6
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 claims description 6
- 239000007789 gas Substances 0.000 description 31
- 239000000243 solution Substances 0.000 description 21
- 238000002360 preparation method Methods 0.000 description 10
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 9
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 9
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 9
- 239000011550 stock solution Substances 0.000 description 6
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- 238000001914 filtration Methods 0.000 description 3
- 108010025899 gelatin film Proteins 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 238000006386 neutralization reaction Methods 0.000 description 3
- 238000006116 polymerization reaction Methods 0.000 description 3
- 238000000526 short-path distillation Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000003507 refrigerant Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
- C01B32/50—Carbon dioxide
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Carbon And Carbon Compounds (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention discloses a method for preparing carbon dioxide after purification of liquid carbon dioxide, which comprises the following steps of 1) conveying 99.5% of liquid carbon dioxide in a low-temperature liquid storage tank into a high-purity liquid carbon dioxide purification device for first purification, conveying the purified carbon dioxide into a vaporizer for gasification, and conveying the gasified carbon dioxide into a purifier for second purification; a breathable film is arranged in an air outlet pipe of the high-purity liquid carbon dioxide purification device; 2) purifying, detecting and testing the carbon dioxide treated by the purifier, sending the purified carbon dioxide into a diaphragm compressor after the carbon dioxide is qualified, pressurizing by 0-15 mpa, and filling into a vacuum gas cylinder; 3) testing the carbon dioxide filled in the vacuum gas cylinder, sending the carbon dioxide to a warehouse for storage after the carbon dioxide is qualified; the invention can meet the requirement of the market on carbon dioxide and can realize the requirement on the purity of the carbon dioxide, so that the purity of the carbon dioxide reaches 99.999 percent.
Description
Technical Field
The invention relates to the technical field of carbon dioxide processing, in particular to a method for preparing carbon dioxide after purifying liquid carbon dioxide.
Background
The liquid carbon dioxide has wide application, can be used as a refrigerant for preserving food, can be used for artificial rainfall, and is also an industrial raw material. Although liquid carbon dioxide is very versatile, its purity requirements are also very high.
At present, a common method of a carbon dioxide purification method is that a refrigerant cools compressed gas to about minus 25 ℃ to liquefy the compressed gas, and then rectification and purification are performed, so that noncondensable gases such as hydrogen, nitrogen, methane and the like in raw materials can be effectively removed by the method to obtain high-purity liquid carbon dioxide, but the purity of the carbon dioxide is usually 99.5%, but the carbon dioxide cannot be met and used in industries with high requirements for the purity of carbon dioxide, and a simple, convenient and rapid purification method is needed to further improve the purity of carbon dioxide.
Disclosure of Invention
The invention provides a method for preparing carbon dioxide after purifying liquid carbon dioxide.
The scheme of the invention is as follows:
a method for producing carbon dioxide after purification by liquid carbon dioxide, comprising the steps of:
1) conveying 99.5% of liquid carbon dioxide in the low-temperature liquid storage tank into a high-purity liquid carbon dioxide purification device for first purification, conveying the purified carbon dioxide into a vaporizer for gasification, and conveying the gasified carbon dioxide into a purifier for second purification; a breathable film is arranged in an air outlet pipe of the high-purity liquid carbon dioxide purification device, and comprises 50-70 parts of aromatic polyamide solution, 30-50 parts of melamine derivative, 1-2 parts of nano graphene and 3-5 parts of nano silver;
2) purifying, detecting and testing the carbon dioxide treated by the purifier, sending the purified carbon dioxide into a diaphragm compressor after the carbon dioxide is qualified, pressurizing by 0-15 mpa, and filling into a vacuum gas cylinder;
3) and testing the carbon dioxide filled in the vacuum gas cylinder, and sending the carbon dioxide to a warehouse for storage after the carbon dioxide is qualified.
As a preferable technical scheme, the stirring paddle in the purification tank of the high-purity liquid carbon dioxide purification device is a magnetic stirring paddle.
Preferably, the purifier is a carbon dioxide purifying device.
As a preferable technical solution, the purification detection assay in step 2) is performed after the carbon dioxide processed by the purifier is left for 8 hours.
Preferably, the diaphragm compressor pressurizes 0-15 mpa within 6 hours.
Preferably, the step 2) is carried out after being put into a vacuum cylinder and standing for more than 8 hours until the step 3).
Preferably, the carbon dioxide loaded in the vacuum cylinder in the step 3) is assayed by using a carbon dioxide analyzer.
As a preferable technical scheme, the carbon dioxide filled in the vacuum gas cylinder is tested in the step 3) to reach the standard of 99.999%.
As a preferred embodiment, the aromatic polyamide solution comprises 50 mol% of 4,4，Diaminodiphenyl ether, 25 mol% p-phenylenediamine, 25 mol% o-dianisidine, dehydrated N-methyl-2-pyrrolidone, 100 mol% isophthaloyl chloride and lithium carbonate.
As a preferable technical scheme, the melamine derivative comprises 58 parts of formaldehyde, 40 parts of melamine, 29 parts of ethylenediamine and a proper amount of pH regulator.
Due to the adoption of the technical scheme, the method for preparing the carbon dioxide after purifying the liquid carbon dioxide comprises the following steps: 1) conveying 99.5% of liquid carbon dioxide in the low-temperature liquid storage tank into a high-purity liquid carbon dioxide purification device for first purification, conveying the purified carbon dioxide into a vaporizer for gasification, and conveying the gasified carbon dioxide into a purifier for second purification; a breathable film is arranged in an air outlet pipe of the high-purity liquid carbon dioxide purification device, and comprises 50-70 parts of aromatic polyamide solution, 30-50 parts of melamine derivative, 1-2 parts of nano graphene and 3-5 parts of nano silver; 2) purifying, detecting and testing the carbon dioxide treated by the purifier, sending the purified carbon dioxide into a diaphragm compressor after the carbon dioxide is qualified, pressurizing by 0-15 mpa, and filling into a vacuum gas cylinder; 3) and testing the carbon dioxide filled in the vacuum gas cylinder, and sending the carbon dioxide to a warehouse for storage after the carbon dioxide is qualified.
The invention has the advantages that:
the method for producing carbon dioxide disclosed by the invention can meet the requirement of the market on carbon dioxide, and can realize the requirement on the purity of the carbon dioxide while ensuring the yield, so that the purity of the carbon dioxide reaches 99.999 percent. The invention fully considers various factors to realize the operation of simple, stable, high-efficiency and low energy consumption preparation steps for producing the high-purity carbon dioxide.
Drawings
FIG. 1 is a flow chart of an embodiment of the present invention.
Detailed Description
In order to remedy the above disadvantages, the present invention provides a method for preparing carbon dioxide by purifying liquid carbon dioxide to solve the above problems in the background art.
A method for producing carbon dioxide after purification by liquid carbon dioxide, comprising the steps of:
1) conveying 99.5% of liquid carbon dioxide in the low-temperature liquid storage tank into a high-purity liquid carbon dioxide purification device for first purification, conveying the purified carbon dioxide into a vaporizer for gasification, and conveying the gasified carbon dioxide into a purifier for second purification; a breathable film is arranged in an air outlet pipe of the high-purity liquid carbon dioxide purification device, and comprises 50-70 parts of aromatic polyamide solution, 30-50 parts of melamine derivative, 1-2 parts of nano graphene and 3-5 parts of nano silver;
2) purifying, detecting and testing the carbon dioxide treated by the purifier, sending the purified carbon dioxide into a diaphragm compressor after the carbon dioxide is qualified, pressurizing by 0-15 mpa, and filling into a vacuum gas cylinder;
3) and testing the carbon dioxide filled in the vacuum gas cylinder, and sending the carbon dioxide to a warehouse for storage after the carbon dioxide is qualified.
And the stirring paddle in the purification tank of the high-purity liquid carbon dioxide purification device is a magnetic stirring paddle.
The purifier is a carbon dioxide purification device.
And the purification detection assay in the step 2) is a purification detection assay performed after the carbon dioxide treated by the purifier is kept stand for 8 hours.
The diaphragm compressor is pressurized at 0-15 mpa for 6 hours.
Step 2) is filled into a vacuum gas cylinder and stands for more than 8 hours before the step 3) is carried out.
And 3) testing the carbon dioxide filled in the vacuum gas cylinder in the step 3) by using a carbon dioxide analyzer.
And 3) testing the carbon dioxide filled in the vacuum gas cylinder in the step 3) until the standard of 99.999 percent is reached.
The aromatic polyamide solution comprises 50 mol% of 4,4，Diaminodiphenyl ether, 25 mol% p-phenylenediamine, 25 mol% o-dianisidine, dehydrated N-methyl-2-pyrrolidone, 100 mol% isophthaloyl chloride and lithium carbonate.
The melamine derivative comprises 58 parts of formaldehyde, 40 parts of melamine, 29 parts of ethylenediamine and a proper amount of pH regulator.
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
Example 1:
1) conveying 99.5% of liquid carbon dioxide in the low-temperature liquid storage tank into a high-purity liquid carbon dioxide purification device for first purification, conveying the purified carbon dioxide into a vaporizer for gasification, and conveying the gasified carbon dioxide into a purifier for second purification; a breathable film is arranged in an air outlet pipe of the high-purity liquid carbon dioxide purification device, and the breathable film comprises 50 parts by weight of aromatic polyamide solution, 30 parts by weight of melamine derivative, 1 part by weight of nano graphene and 3 parts by weight of nano silver;
2) purifying, detecting and testing the carbon dioxide treated by the purifier, sending the purified carbon dioxide into a diaphragm compressor after the carbon dioxide is qualified, pressurizing by 0-15 mpa, and filling into a vacuum gas cylinder;
3) and testing the carbon dioxide filled in the vacuum gas cylinder, and sending the carbon dioxide to a warehouse for storage after the carbon dioxide is qualified.
The preparation method of the breathable film comprises the following steps: stirring and mixing 50 parts by weight of aromatic polyamide solution, 30 parts by weight of melamine derivative, 1 part by weight of nano graphene and 3 parts by weight of nano silver to obtain film forming stock solution; and then coating the carrier plate by an applicator, drying the film-forming stock solution coated on the carrier plate at the hot air temperature of 120 ℃ to obtain a gel film, and stretching and forming by a stretcher to obtain the filtering film.
And the stirring paddle in the purification tank of the high-purity liquid carbon dioxide purification device is a magnetic stirring paddle.
The purifier is a carbon dioxide purification device, and the carbon dioxide purification device adopts an RZ-CO2-35 type carbon dioxide purification device of Razeg gas purification Hubei Limited company.
And the purification detection assay in the step 2) is a purification detection assay performed after the carbon dioxide treated by the purifier is kept stand for 8 hours.
The diaphragm compressor is pressurized at 0-15 mpa for 6 hours.
Step 2) is filled into a vacuum gas cylinder and stands for more than 8 hours before the step 3) is carried out.
And 3) testing the carbon dioxide filled in the vacuum gas cylinder in the step 3) by using a carbon dioxide analyzer.
And 3) testing the carbon dioxide filled in the vacuum gas cylinder in the step 3) until the standard of 99.999 percent is reached.
The aromatic polyamide solution comprises 50 mol% of 4,4，Diaminodiphenyl ether, 25 mol% p-phenylenediamine, 25 mol% o-dianisidine, dehydrated N-methyl-2-pyrrolidone, 100 mol% isophthaloyl chloride and lithium carbonate; the preparation method of the aromatic polyamide solution comprises the following steps: 50 mol% of 4,4，Diaminodiphenyl ether, 25 mol% of p-phenylenediamine, and 25 mol% of o-dianisidine were dissolved in dehydrated N-methyl-2-pyrrolidone, 100 mol% of isophthaloyl chloride was added thereto, and polymerization was carried out with stirring for 2 hours, followed by neutralization with lithium carbonate, to obtain an aromatic polyamide solution.
The melamine derivative comprises 58 parts by weight of formaldehyde, 40 parts by weight of melamine, 29 parts by weight of ethylenediamine and a proper amount of pH regulator, and the preparation method of the melamine derivative is provided; adding formaldehyde into melamine, adjusting pH to 9.5 with sodium hydroxide, stirring at 80 deg.C for 1h, adding ethylenediamine, adding acetic acid to adjust pH to 6.5, stirring at 90 deg.C for 1h, and removing impurities by short-path distillation to obtain melamine derivative.
Example 2:
1) conveying 99.5% of liquid carbon dioxide in the low-temperature liquid storage tank into a high-purity liquid carbon dioxide purification device for first purification, conveying the purified carbon dioxide into a vaporizer for gasification, and conveying the gasified carbon dioxide into a purifier for second purification; a breathable film is arranged in an air outlet pipe of the high-purity liquid carbon dioxide purification device, and the breathable film comprises 70 parts by weight of aromatic polyamide solution, 50 parts by weight of melamine derivative, 2 parts by weight of nano graphene and 5 parts by weight of nano silver;
2)2) purifying, detecting and testing the carbon dioxide treated by the purifier, sending the purified carbon dioxide into a diaphragm compressor after the carbon dioxide is qualified, pressurizing at 0-15 mpa, and filling into a vacuum gas cylinder;
3) and testing the carbon dioxide filled in the vacuum gas cylinder, and sending the carbon dioxide to a warehouse for storage after the carbon dioxide is qualified.
The preparation method of the breathable film comprises the following steps: stirring and mixing 70 parts by weight of aromatic polyamide solution, 50 parts by weight of melamine derivative, 2 parts by weight of nano graphene and 5 parts by weight of nano silver to obtain film forming stock solution; and then coating the carrier plate by an applicator, drying the film-forming stock solution coated on the carrier plate at the hot air temperature of 120 ℃ to obtain a gel film, and stretching and forming by a stretcher to obtain the filtering film.
And the stirring paddle in the purification tank of the high-purity liquid carbon dioxide purification device is a magnetic stirring paddle.
The purifier is a carbon dioxide purification device, and the carbon dioxide purification device adopts an RZ-CO2-35 type carbon dioxide purification device of Razeg gas purification Hubei Limited company.
And the purification detection assay in the step 2) is a purification detection assay performed after the carbon dioxide treated by the purifier is kept stand for 8 hours.
The diaphragm compressor is pressurized at 0-15 mpa for 6 hours.
Step 2) is filled into a vacuum gas cylinder and stands for more than 8 hours before the step 3) is carried out.
And 3) testing the carbon dioxide filled in the vacuum gas cylinder in the step 3) by using a carbon dioxide analyzer.
And 3) testing the carbon dioxide filled in the vacuum gas cylinder in the step 3) until the standard of 99.999 percent is reached.
The aromatic polyamide solution comprises 50 mol% of 4,4，Diaminodiphenyl ether, 25 mol% p-phenylenediamine, 25 mol% o-dianisidine, dehydrated N-methyl-2-pyrrolidone, 100 mol% isophthaloyl chloride and lithium carbonate; the preparation method of the aromatic polyamide solution comprises the following steps: 50 mol% of 4,4，Diaminodiphenyl ether, 25 mol% of p-phenylenediamine, and 25 mol% of o-dianisidine were dissolved in dehydrated N-methyl-2-pyrrolidone, 100 mol% of isophthaloyl chloride was added thereto, and polymerization was carried out with stirring for 2 hours, followed by neutralization with lithium carbonate, to obtain an aromatic polyamide solution.
The melamine derivative comprises 58 parts by weight of formaldehyde, 40 parts by weight of melamine, 29 parts by weight of ethylenediamine and a proper amount of pH regulator, and the preparation method of the melamine derivative is provided; adding formaldehyde into melamine, adjusting pH to 9.5 with sodium hydroxide, stirring at 80 deg.C for 1h, adding ethylenediamine, adding acetic acid to adjust pH to 6.5, stirring at 90 deg.C for 1h, and removing impurities by short-path distillation to obtain melamine derivative.
Example 3:
1) conveying 99.5% of liquid carbon dioxide in the low-temperature liquid storage tank into a high-purity liquid carbon dioxide purification device for first purification, conveying the purified carbon dioxide into a vaporizer for gasification, and conveying the gasified carbon dioxide into a purifier for second purification; a breathable film is arranged in an air outlet pipe of the high-purity liquid carbon dioxide purification device, and the breathable film comprises 60 parts by weight of aromatic polyamide solution, 40 parts by weight of melamine derivative, 1 part by weight of nano graphene and 4 parts by weight of nano silver;
2) purifying, detecting and testing the carbon dioxide treated by the purifier, sending the purified carbon dioxide into a diaphragm compressor after the carbon dioxide is qualified, pressurizing by 0-15 mpa, and filling into a vacuum gas cylinder;
3) and testing the carbon dioxide filled in the vacuum gas cylinder, and sending the carbon dioxide to a warehouse for storage after the carbon dioxide is qualified.
The preparation method of the breathable film comprises the following steps: stirring and mixing 60 parts by weight of aromatic polyamide solution, 40 parts by weight of melamine derivative, 1 part by weight of nano graphene and 4 parts by weight of nano silver to obtain film forming stock solution; and then coating the carrier plate by an applicator, drying the film-forming stock solution coated on the carrier plate at the hot air temperature of 120 ℃ to obtain a gel film, and stretching and forming by a stretcher to obtain the filtering film.
And the stirring paddle in the purification tank of the high-purity liquid carbon dioxide purification device is a magnetic stirring paddle.
The purifier is a carbon dioxide purification device, and the carbon dioxide purification device adopts an RZ-CO2-35 type carbon dioxide purification device of Razeg gas purification Hubei Limited company.
And the purification detection assay in the step 2) is a purification detection assay performed after the carbon dioxide treated by the purifier is kept stand for 8 hours.
The diaphragm compressor is pressurized at 0-15 mpa for 6 hours.
Step 2) is filled into a vacuum gas cylinder and stands for more than 8 hours before the step 3) is carried out.
And 3) testing the carbon dioxide filled in the vacuum gas cylinder in the step 3) by using a carbon dioxide analyzer.
And 3) testing the carbon dioxide filled in the vacuum gas cylinder in the step 3) until the standard of 99.999 percent is reached.
The aromatic polyamide solution comprises 50 mol% of 4,4，Diaminodiphenyl ether, 25 mol% p-phenylenediamine, 25 mol% o-dianisidine, dehydrated N-methyl-2-pyrrolidone100 mol% of isophthaloyl dichloride and lithium carbonate; the preparation method of the aromatic polyamide solution comprises the following steps: 50 mol% of 4,4，Diaminodiphenyl ether, 25 mol% of p-phenylenediamine, and 25 mol% of o-dianisidine were dissolved in dehydrated N-methyl-2-pyrrolidone, 100 mol% of isophthaloyl chloride was added thereto, and polymerization was carried out with stirring for 2 hours, followed by neutralization with lithium carbonate, to obtain an aromatic polyamide solution.
The melamine derivative comprises 58 parts by weight of formaldehyde, 40 parts by weight of melamine, 29 parts by weight of ethylenediamine and a proper amount of pH regulator, and the preparation method of the melamine derivative is provided; adding formaldehyde into melamine, adjusting pH to 9.5 with sodium hydroxide, stirring at 80 deg.C for 1h, adding ethylenediamine, adding acetic acid to adjust pH to 6.5, stirring at 90 deg.C for 1h, and removing impurities by short-path distillation to obtain melamine derivative.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. A method for preparing carbon dioxide after purification of liquid carbon dioxide is characterized by comprising the following steps:
1) conveying 99.5% of liquid carbon dioxide in the low-temperature liquid storage tank into a high-purity liquid carbon dioxide purification device for first purification, conveying the purified carbon dioxide into a vaporizer for gasification, and conveying the gasified carbon dioxide into a purifier for second purification; a breathable film is arranged in an air outlet pipe of the high-purity liquid carbon dioxide purification device, and comprises 50-70 parts of aromatic polyamide solution, 30-50 parts of melamine derivative, 1-2 parts of nano graphene and 3-5 parts of nano silver;
2) purifying, detecting and testing the carbon dioxide treated by the purifier, sending the purified carbon dioxide into a diaphragm compressor after the carbon dioxide is qualified, pressurizing by 0-15 mpa, and filling into a vacuum gas cylinder;
3) and testing the carbon dioxide filled in the vacuum gas cylinder, and sending the carbon dioxide to a warehouse for storage after the carbon dioxide is qualified.
2. The method of claim 1 for producing carbon dioxide by purifying liquid carbon dioxide, wherein: and the stirring paddle in the purification tank of the high-purity liquid carbon dioxide purification device is a magnetic stirring paddle.
3. The method of claim 1 for producing carbon dioxide by purifying liquid carbon dioxide, wherein: the purifier is a carbon dioxide purification device.
4. The method of claim 1 for producing carbon dioxide by purifying liquid carbon dioxide, wherein: and the purification detection assay in the step 2) is a purification detection assay performed after the carbon dioxide treated by the purifier is kept stand for 8 hours.
5. The method of claim 1 for producing carbon dioxide by purifying liquid carbon dioxide, wherein: the diaphragm compressor is pressurized at 0-15 mpa for 6 hours.
6. The method of claim 1 for producing carbon dioxide by purifying liquid carbon dioxide, wherein: step 2) is filled into a vacuum gas cylinder and stands for more than 8 hours before the step 3) is carried out.
7. The method of claim 1 for producing carbon dioxide by purifying liquid carbon dioxide, wherein: and 3) testing the carbon dioxide filled in the vacuum gas cylinder in the step 3) by using a carbon dioxide analyzer.
8. The method of claim 1 for producing carbon dioxide by purifying liquid carbon dioxide, wherein: and 3) testing the carbon dioxide filled in the vacuum gas cylinder in the step 3) until the standard of 99.999 percent is reached.
9. The method of claim 1 for producing carbon dioxide by purifying liquid carbon dioxide, wherein: the aromatic polyamide solution comprises 50 mol% of 4, 4' -diaminodiphenyl ether, 25 mol% of p-phenylenediamine, 25 mol% of o-dianisidine, dehydrated N-methyl-2-pyrrolidone, 100 mol% of isophthaloyl dichloride and lithium carbonate.
10. The method of claim 1 for producing carbon dioxide by purifying liquid carbon dioxide, wherein: the melamine derivative comprises 58 parts of formaldehyde, 40 parts of melamine, 29 parts of ethylenediamine and a proper amount of pH regulator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110685720.6A CN113307269A (en) | 2021-06-21 | 2021-06-21 | Method for preparing carbon dioxide after purification of liquid carbon dioxide |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110685720.6A CN113307269A (en) | 2021-06-21 | 2021-06-21 | Method for preparing carbon dioxide after purification of liquid carbon dioxide |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113307269A true CN113307269A (en) | 2021-08-27 |
Family
ID=77379716
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110685720.6A Pending CN113307269A (en) | 2021-06-21 | 2021-06-21 | Method for preparing carbon dioxide after purification of liquid carbon dioxide |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113307269A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102198939A (en) * | 2010-03-23 | 2011-09-28 | 江都市显业集团有限公司 | Carbon dioxide recovery system |
| CN103282108A (en) * | 2011-01-12 | 2013-09-04 | 富士胶片株式会社 | Composition for formation of carbon dioxide separation membrane, carbon dioxide separation membrane and process for production thereof, and carbon dioxide separation apparatus |
| CN104379241A (en) * | 2012-05-30 | 2015-02-25 | 东丽株式会社 | Carbon-dioxide-separating membrane |
| CN204237566U (en) * | 2014-12-04 | 2015-04-01 | 中国庆华能源集团有限公司 | A kind of system reducing discharging Coal Chemical Industry carbonic acid gas |
| CN104548964A (en) * | 2014-12-08 | 2015-04-29 | 重庆市农业科学院 | Star carbon dioxide fixed carrier and preparation method thereof as well as preparation method of separating membrane material |
-
2021
- 2021-06-21 CN CN202110685720.6A patent/CN113307269A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102198939A (en) * | 2010-03-23 | 2011-09-28 | 江都市显业集团有限公司 | Carbon dioxide recovery system |
| CN103282108A (en) * | 2011-01-12 | 2013-09-04 | 富士胶片株式会社 | Composition for formation of carbon dioxide separation membrane, carbon dioxide separation membrane and process for production thereof, and carbon dioxide separation apparatus |
| CN104379241A (en) * | 2012-05-30 | 2015-02-25 | 东丽株式会社 | Carbon-dioxide-separating membrane |
| CN204237566U (en) * | 2014-12-04 | 2015-04-01 | 中国庆华能源集团有限公司 | A kind of system reducing discharging Coal Chemical Industry carbonic acid gas |
| CN104548964A (en) * | 2014-12-08 | 2015-04-29 | 重庆市农业科学院 | Star carbon dioxide fixed carrier and preparation method thereof as well as preparation method of separating membrane material |
Non-Patent Citations (6)
| Title |
|---|
| "二氧化碳动态减压提纯工艺", 《湖南科学技术研究成果公报(2002年第1期)(P96)》 * |
| SUBBIAH ALWARAPPAN: "《石墨烯基材料科学与技术》", 30 June 2016, 国防工业出版社 * |
| ZULFUQAR,S: "Aramid as potential solid sorbent for CO2 capture", 《POLYMER SCIENCE SERIES》 * |
| 张磊: "基于碳纳米管垂直阵列的复合纳滤膜制备及输运性能研究", 《中国博士学位论文全文数据库》 * |
| 杨幸: "PSF-Pebax 3533复合膜的制备及其CO2/N2分离性能的研究", 《塑料科技》 * |
| 王湛: "《膜分离技术基础》", 31 August 2006, 化学工业出版社 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112973468B (en) | Method for preparing two-dimensional covalent organic framework ultrathin nanosheet material composite membrane and application | |
| Sun et al. | Microstructural optimization of NH2-MIL-125 membranes with superior H2/CO2 separation performance by innovating metal sources and heating modes | |
| CN108715649B (en) | Preparation method of metal organic aerogel | |
| CN104114259A (en) | Aqueous solution which efficiently absorbs and recovers carbon dioxide in exhaust gas, and method for recovering carbon dioxide using same | |
| TW200948761A (en) | Methods for salt production | |
| CN113307269A (en) | Method for preparing carbon dioxide after purification of liquid carbon dioxide | |
| US10808267B2 (en) | Production system and method of production for organic compound or microorganism | |
| CN208349688U (en) | A kind of liquefaction of hydrogen system having hydrogen components detection function | |
| CN111875796B (en) | Polyimide nano-microsphere for gas separation membrane | |
| CN103420793A (en) | Method for separating and purifying butanol with polyvinylidene fluoride-dimethyl silicone polymer composite film | |
| CN210559371U (en) | Rectification purification system for low-pressure liquefied gas | |
| CN101874998B (en) | Inclusion reactor and method for producing 1-methylcyclopropene antistaling agent by using same | |
| CN103250696A (en) | Preparation method for high-concentration ethephon aqua | |
| CN110203895A (en) | A kind of the circulatory purification system and circulatory purification method of helium | |
| CN112973456A (en) | Two-dimensional metal organic framework nanosheet film, and preparation method and application thereof | |
| Liu et al. | Rheological properties, drug release behavior and cytocompatibility of novel hydrogels prepared from carboxymethyl chitosan | |
| CN108679929B (en) | Hydrogen liquefaction system with hydrogen component detection function | |
| CN112979970B (en) | Method for preparing multi-nitrogen two-dimensional covalent organic framework material by using 1,3, 5-triacyl phloroglucinol as center and application | |
| CN208532223U (en) | A kind of portable secured controllable self-loopa solution device for producing hydrogen | |
| CN208327502U (en) | Comprehensive water treatment device | |
| CN101067472A (en) | Small container high-pure gas canning method and portable medical oxygen | |
| CN207556300U (en) | A kind of horizontal condenser for being used to prepare pungent pyrrone amine | |
| WO2023193313A1 (en) | Amino acid polymer, and preparation method therefor and use thereof as natural gas hydrate kinetic inhibitor | |
| CN105237792A (en) | Method for preparing polytetrafluoroethylene super-hydrophobic coating | |
| CN213018927U (en) | Carbon dioxide feed gas supply device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210827 |