CN117839622A - Carbon dioxide adsorbent and preparation process thereof - Google Patents
Carbon dioxide adsorbent and preparation process thereof Download PDFInfo
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- CN117839622A CN117839622A CN202410091404.XA CN202410091404A CN117839622A CN 117839622 A CN117839622 A CN 117839622A CN 202410091404 A CN202410091404 A CN 202410091404A CN 117839622 A CN117839622 A CN 117839622A
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- Prior art keywords
- bentonite
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- carbon dioxide
- dioxide adsorbent
- ethanolamine
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- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 title claims abstract description 93
- 239000001569 carbon dioxide Substances 0.000 title claims abstract description 46
- 229910002092 carbon dioxide Inorganic materials 0.000 title claims abstract description 46
- 239000003463 adsorbent Substances 0.000 title claims abstract description 40
- 238000002360 preparation method Methods 0.000 title claims abstract description 11
- 229910000278 bentonite Inorganic materials 0.000 claims abstract description 92
- 239000000440 bentonite Substances 0.000 claims abstract description 92
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims abstract description 92
- HZAXFHJVJLSVMW-UHFFFAOYSA-N 2-Aminoethan-1-ol Chemical compound NCCO HZAXFHJVJLSVMW-UHFFFAOYSA-N 0.000 claims abstract description 44
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims abstract description 39
- 238000003756 stirring Methods 0.000 claims abstract description 25
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 22
- 239000002994 raw material Substances 0.000 claims abstract description 14
- 239000012153 distilled water Substances 0.000 claims abstract description 13
- 238000000227 grinding Methods 0.000 claims abstract description 11
- 238000010992 reflux Methods 0.000 claims abstract description 11
- XMIIGOLPHOKFCH-UHFFFAOYSA-N 3-phenylpropionic acid Chemical compound OC(=O)CCC1=CC=CC=C1 XMIIGOLPHOKFCH-UHFFFAOYSA-N 0.000 claims abstract description 5
- -1 nazCO3 Chemical compound 0.000 claims abstract description 3
- 229940092782 bentonite Drugs 0.000 claims description 91
- 238000001035 drying Methods 0.000 claims description 20
- 239000006228 supernatant Substances 0.000 claims description 18
- 238000000967 suction filtration Methods 0.000 claims description 16
- 230000004048 modification Effects 0.000 claims description 13
- 238000012986 modification Methods 0.000 claims description 13
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 12
- 239000011734 sodium Substances 0.000 claims description 12
- 229910052708 sodium Inorganic materials 0.000 claims description 12
- 239000003795 chemical substances by application Substances 0.000 claims description 10
- 230000020477 pH reduction Effects 0.000 claims description 9
- 238000004519 manufacturing process Methods 0.000 claims description 7
- ONCZQWJXONKSMM-UHFFFAOYSA-N dialuminum;disodium;oxygen(2-);silicon(4+);hydrate Chemical compound O.[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[Na+].[Na+].[Al+3].[Al+3].[Si+4].[Si+4].[Si+4].[Si+4] ONCZQWJXONKSMM-UHFFFAOYSA-N 0.000 claims description 6
- 229910000280 sodium bentonite Inorganic materials 0.000 claims description 6
- 229940080314 sodium bentonite Drugs 0.000 claims description 6
- 238000006243 chemical reaction Methods 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 5
- 230000004913 activation Effects 0.000 claims description 4
- 230000032683 aging Effects 0.000 claims description 4
- 229910000281 calcium bentonite Inorganic materials 0.000 claims description 4
- 239000008367 deionised water Substances 0.000 claims description 4
- 229910021641 deionized water Inorganic materials 0.000 claims description 4
- 239000012065 filter cake Substances 0.000 claims description 4
- 238000001914 filtration Methods 0.000 claims description 4
- 239000012535 impurity Substances 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims description 4
- 239000003607 modifier Substances 0.000 claims description 4
- 238000000746 purification Methods 0.000 claims description 4
- 239000011541 reaction mixture Substances 0.000 claims description 4
- 239000000725 suspension Substances 0.000 claims description 4
- 238000005406 washing Methods 0.000 claims description 4
- 238000005303 weighing Methods 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 claims 2
- 238000001179 sorption measurement Methods 0.000 abstract description 18
- 230000008859 change Effects 0.000 abstract description 4
- 239000007789 gas Substances 0.000 abstract description 4
- 239000007787 solid Substances 0.000 abstract description 4
- 230000009471 action Effects 0.000 abstract description 3
- COUNCWOLUGAQQG-UHFFFAOYSA-N copper;hydrogen peroxide Chemical compound [Cu].OO COUNCWOLUGAQQG-UHFFFAOYSA-N 0.000 abstract description 3
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 abstract description 3
- 239000000126 substance Substances 0.000 abstract description 3
- 230000000630 rising effect Effects 0.000 abstract 1
- 239000002245 particle Substances 0.000 description 3
- 235000019738 Limestone Nutrition 0.000 description 2
- 239000006028 limestone Substances 0.000 description 2
- 230000009965 odorless effect Effects 0.000 description 2
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 1
- 241001465754 Metazoa Species 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 230000002745 absorbent Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001354 calcination Methods 0.000 description 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
- 239000000920 calcium hydroxide Substances 0.000 description 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 1
- 229910002090 carbon oxide Inorganic materials 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 239000005431 greenhouse gas Substances 0.000 description 1
- 239000002574 poison Substances 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 235000014214 soft drink Nutrition 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02C—CAPTURE, STORAGE, SEQUESTRATION OR DISPOSAL OF GREENHOUSE GASES [GHG]
- Y02C20/00—Capture or disposal of greenhouse gases
- Y02C20/40—Capture or disposal of greenhouse gases of CO2
Landscapes
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Abstract
The invention discloses a carbon dioxide adsorbent and a preparation process thereof, wherein the carbon dioxide adsorbent comprises the following raw materials and a preparation tool, and the raw materials comprise: bentonite, distilled water, HCI, hydrochloric acid, nazCO3, ethanolamine, the tool comprising: stirring tool, oven, grinding disc, normal pressure reflux unit, three-necked flask. According to the carbon dioxide adsorbent and the preparation process thereof, the adsorbent prepared from the ethanolamine is good in adsorption rate, the adsorption rate of carbon dioxide is effective under the condition of different temperatures, the carbon dioxide adsorbent cannot change due to the rising or falling of the temperature, the prepared solid carbon dioxide adsorbent can absorb copper dioxide in a high selectivity manner through chemical action, meanwhile, the influence of other external gases and water on the adsorbent is small, the adsorption efficiency can be greatly improved due to the high amino density, and the adsorption performance can be greatly improved.
Description
Technical Field
The invention relates to the field of carbon dioxide adsorbents, in particular to a carbon dioxide adsorbent and a preparation process thereof.
Background
Carbon dioxide is a kind of carbon oxide, is colorless, odorless or colorless, odorless and the water solution of the carbon dioxide has slightly sour gas at normal temperature and normal pressure, is a common greenhouse gas, is one of components of air, and carbon dioxide can be generally prepared by calcining limestone at high temperature or by reacting limestone with dilute hydrochloric acid, is mainly applied to refrigerated and perishable foods, used as a refrigerant, used for preparing carbonized soft drinks and used as a solvent for homogeneous reaction), and the like, and researches show that regarding toxicity of the carbon dioxide: the low concentration of carbon dioxide is not toxic and the high concentration of carbon dioxide can poison animals.
The carbon dioxide adsorbent is also called as carbon dioxide adsorbent, absorbent, calcium hydroxide, white, pink, light green, white particles, light purple and pink cylindrical strip particles after absorbing carbon dioxide, light yellow after absorbing carbon dioxide, and shaped like particles in the shape of sheet circle, column, sphere, etc.
When the existing carbon dioxide adsorbent is used, the adsorption rate can be influenced due to the change of temperature, so that the adsorption rate can be influenced to a certain extent under specific conditions, and can be influenced by other outside gases and water, so that the overall adsorption performance can be greatly influenced.
Disclosure of Invention
The invention mainly aims to provide a carbon dioxide adsorbent and a preparation process thereof, which can effectively solve the problems in the background technology.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
a carbon dioxide adsorbent comprising the following raw materials and a preparation tool, the raw materials comprising: bentonite, distilled water, HCI, hydrochloric acid, nazCO3, ethanolamine, the tool comprising: the bentonite comprises 100-150 parts of bentonite, 20-50 parts of HCI, 5-15 parts of hydrochloric acid, 10-30 parts of NazCO3 and 8-16 parts of ethanolamine.
Preferably, the bentonite has a proportion of 145 parts, the HCI has a proportion of 45 parts, the hydrochloric acid has a proportion of 13 parts, the NazCO3 has a proportion of 28 parts, and the ethanolamine has a proportion of 13 parts.
Preferably, the bentonite has a proportion of 110 parts, the HCI has a proportion of 25 parts, the hydrochloric acid has a proportion of 8 parts, the NazCO3 has a proportion of 17 parts, and the ethanolamine has a proportion of 9 parts.
A process for preparing a carbon dioxide adsorbent, comprising the following operative steps:
s1: purification of bentonite: placing bentonite into distilled water according to a certain proportion, stirring the bentonite, continuously adding distilled water after stirring for ten minutes, continuously stirring for four hours, standing the bentonite for four hours, discarding impurities at the lower layer after the standing time is reached, adding HCI, adjusting the PH of the bentonite, removing clear liquid at the upper layer of the bentonite after the adjustment is finished, carrying out reduced pressure suction filtration on the supernatant, placing the supernatant in an oven, drying the supernatant at the temperature of 100 ℃, continuously drying the supernatant for half an hour, taking the supernatant out after drying, and carrying out grinding treatment on the supernatant to form the calcium bentonite;
s2: activation of bentonite: the reaction mixture is subjected to acidification reaction: preparing an atmospheric reflux device, weighing purified bentonite according to a part, putting the purified bentonite into a 250mL three-necked flask, adding hydrochloric acid according to a part, stirring and refluxing the bentonite at a temperature of 95 ℃ for five hours, adjusting the PH value of the bentonite, and drying a filter cake to obtain acidified bentonite;
s3: sodium modification of bentonite: adopting NazCO3 as a sodium treatment agent, keeping the temperature at 60 ℃ under the conditions that the dosage of the sodium treatment agent is 2% and the mass fraction of ore pulp is 10%, heating and stirring for 1 hour, standing and ageing for 24 hours, carrying out suction filtration, and drying the treated sodium bentonite in an environment of 105 ℃ after the suction filtration is finished, so as to prepare sodium bentonite as an organically modified raw material at one time;
s4: organic modification of bentonite: preparing bentonite into 10% suspension, adding 40% modifier ethanolamine, stirring at 70-80 ℃ for 2 hours, suction filtering, drying at 105 ℃, and grinding to obtain carbon dioxide adsorbent.
Preferably, when the bentonite is purified, the pH of the bentonite is adjusted to 4 after adding HCI.
Preferably, after the acidification is finished, the acidification is subjected to reduced pressure suction filtration, and deionized water is used for washing the supernatant until the PH=3.
Compared with the prior art, the invention has the following beneficial effects:
the invention uses the adsorbent made of the ethanolamine as the treating agent, the adsorption rate is better, the adsorption rate to carbon dioxide is more effective under the condition of different temperatures, the change caused by the rise or the fall of the temperature is avoided, the prepared solid carbon dioxide adsorbent can absorb copper dioxide with high selectivity through chemical action, meanwhile, the influence of other outside gas and water on the adsorbent is less, the adsorption efficiency can be greatly improved due to higher amino density, and the adsorption capacity can be greatly improved.
Detailed Description
The technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
First embodiment:
a carbon dioxide adsorbent comprising the following raw materials and a means for production, the raw materials comprising: bentonite, distilled water, HCI, hydrochloric acid, nazCO3 and ethanolamine, and the tool comprises: the device comprises a stirring tool, an oven, a grinding disc, an atmospheric reflux device and a three-necked flask, wherein the bentonite comprises 100-150 parts, the HCI comprises 20-50 parts, the hydrochloric acid comprises 5-15 parts, the NazCO3 comprises 10-30 parts and the ethanolamine comprises 8-16 parts.
The bentonite has a proportion of 145 parts, the HCI has a proportion of 45 parts, the hydrochloric acid has a proportion of 13 parts, the NazCO3 has a proportion of 28 parts, and the ethanolamine has a proportion of 13 parts.
A process for preparing a carbon dioxide adsorbent, comprising the following steps of:
s1: purification of bentonite: placing bentonite into distilled water according to a certain proportion, stirring the bentonite, continuously adding distilled water after stirring for ten minutes, continuously stirring for four hours, standing the bentonite for four hours, discarding impurities at the lower layer after the standing time is reached, adding HCI, adjusting the PH of the bentonite, removing clear liquid at the upper layer of the bentonite after the adjustment is finished, carrying out reduced pressure suction filtration on the supernatant, placing the bentonite into an oven, drying the bentonite at the temperature of 100 ℃ for half an hour, taking the bentonite out after drying, and carrying out grinding treatment on the bentonite to form calcium bentonite.
S2: activation of bentonite: the reaction mixture is subjected to acidification reaction: preparing an atmospheric reflux device, weighing purified bentonite according to a part, putting the purified bentonite into a 250mL three-necked flask, adding hydrochloric acid according to a part, stirring and refluxing the bentonite at a temperature of 95 ℃, continuously adjusting the PH value of the bentonite for five hours, drying a filter cake, thus obtaining acidified bentonite, and after acidification, carrying out reduced pressure suction filtration treatment on the bentonite, and washing the supernatant by deionized water until PH=3.
S3: sodium modification of bentonite: nazCO3 is adopted as a sodium modification agent, under the conditions that the dosage of the sodium modification agent is 2 percent and the mass fraction of ore pulp is 10 percent, the temperature is kept at 60 ℃, the mixture is heated and stirred for 1 hour, after standing and ageing for 24 hours, suction filtration is carried out, and after the suction filtration is finished, the mixture is dried in an environment of 105 ℃, and sodium bentonite is prepared at one time to be used as an organically modified raw material.
S4: organic modification of bentonite: preparing bentonite into 10% suspension, adding 40% modifier ethanolamine, stirring at 70-80 ℃ for 2 hours, suction filtering, drying at 105 ℃, and grinding to obtain carbon dioxide adsorbent.
Specific embodiment II:
a carbon dioxide adsorbent comprising the following raw materials and a means for production, the raw materials comprising: bentonite, distilled water, HCI, hydrochloric acid, nazCO3 and ethanolamine, and the tool comprises: the device comprises a stirring tool, an oven, a grinding disc, an atmospheric reflux device and a three-necked flask, wherein the bentonite comprises 100-150 parts, the HCI comprises 20-50 parts, the hydrochloric acid comprises 5-15 parts, the NazCO3 comprises 10-30 parts and the ethanolamine comprises 8-16 parts.
The bentonite has a proportion of 110 parts, the HCI has a proportion of 25 parts, the hydrochloric acid has a proportion of 8 parts, the NazCO3 has a proportion of 17 parts, and the ethanolamine has a proportion of 9 parts.
A process for preparing a carbon dioxide adsorbent, comprising the following steps of:
s1: purification of bentonite: placing bentonite into distilled water according to a certain proportion, stirring the bentonite, continuously adding distilled water after stirring for ten minutes, continuously stirring for four hours, standing the bentonite for four hours, discarding impurities at the lower layer after the standing time is reached, adding HCI, adjusting the PH of the bentonite, removing clear liquid at the upper layer of the bentonite after the adjustment is finished, carrying out reduced pressure suction filtration on the supernatant, placing the bentonite into an oven, drying the bentonite at the temperature of 100 ℃ for half an hour, taking the bentonite out after drying, and carrying out grinding treatment on the bentonite to form calcium bentonite.
S2: activation of bentonite: the reaction mixture is subjected to acidification reaction: preparing an atmospheric reflux device, weighing purified bentonite according to a part, putting the purified bentonite into a 250mL three-necked flask, adding hydrochloric acid according to a part, stirring and refluxing the bentonite at a temperature of 95 ℃, continuously adjusting the PH value of the bentonite for five hours, drying a filter cake, thus obtaining acidified bentonite, and after acidification, carrying out reduced pressure suction filtration treatment on the bentonite, and washing the supernatant by deionized water until PH=3.
S3: sodium modification of bentonite: nazCO3 is adopted as a sodium modification agent, under the conditions that the dosage of the sodium modification agent is 2 percent and the mass fraction of ore pulp is 10 percent, the temperature is kept at 60 ℃, the mixture is heated and stirred for 1 hour, after standing and ageing for 24 hours, suction filtration is carried out, and after the suction filtration is finished, the mixture is dried in an environment of 105 ℃, and sodium bentonite is prepared at one time to be used as an organically modified raw material.
S4: organic modification of bentonite: preparing bentonite into 10% suspension, adding 40% modifier ethanolamine, stirring at 70-80 ℃ for 2 hours, suction filtering, drying at 105 ℃, and grinding to obtain carbon dioxide adsorbent.
Third embodiment:
the adsorption amounts of the prepared carbon dioxide adsorbent and other carbon dioxide adsorbents were tested, including the adsorption rates thereof under different temperature environments, and the following table is provided:
therefore, the solid carbon dioxide adsorbent prepared by the invention has better adsorption rate on carbon dioxide under the same temperature environment.
The invention uses the adsorbent made of the ethanolamine as the treating agent, the adsorption rate is better, the adsorption rate to carbon dioxide is more effective under the condition of different temperatures, the change caused by the rise or the fall of the temperature is avoided, the prepared solid carbon dioxide adsorbent can absorb copper dioxide with high selectivity through chemical action, meanwhile, the influence of other outside gas and water on the adsorbent is less, the adsorption efficiency can be greatly improved due to higher amino density, and the adsorption capacity can be greatly improved.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. A carbon dioxide adsorbent, characterized by: the preparation method comprises the following raw materials and a preparation tool, wherein the raw materials comprise: bentonite, distilled water, HCI, hydrochloric acid, nazCO3, ethanolamine, the tool comprising: the bentonite comprises 100-150 parts of bentonite, 20-50 parts of HCI, 5-15 parts of hydrochloric acid, 10-30 parts of NazCO3 and 8-16 parts of ethanolamine.
2. A carbon dioxide adsorbent according to claim 1, characterized in that: the bentonite has 145 parts of bentonite, 45 parts of HCI, 13 parts of hydrochloric acid, 28 parts of NazCO3 and 13 parts of ethanolamine.
3. A carbon dioxide adsorbent according to claim 1, characterized in that: the bentonite has 110 parts, the HCI has 25 parts, the hydrochloric acid has 8 parts, the NazCO3 has 17 parts and the ethanolamine has 9 parts.
4. A process for the preparation of a carbon dioxide adsorbent according to any one of claims 1-3, characterized in that: the method comprises the following operation steps:
s1: purification of bentonite: placing bentonite into distilled water according to a certain proportion, stirring the bentonite, continuously adding distilled water after stirring for ten minutes, continuously stirring for four hours, standing the bentonite for four hours, discarding impurities at the lower layer after the standing time is reached, adding HCI, adjusting the PH of the bentonite, removing clear liquid at the upper layer of the bentonite after the adjustment is finished, carrying out reduced pressure suction filtration on the supernatant, placing the supernatant in an oven, drying the supernatant at the temperature of 100 ℃, continuously drying the supernatant for half an hour, taking the supernatant out after drying, and carrying out grinding treatment on the supernatant to form the calcium bentonite;
s2: activation of bentonite: the reaction mixture is subjected to acidification reaction: preparing an atmospheric reflux device, weighing purified bentonite according to a part, putting the purified bentonite into a 250mL three-necked flask, adding hydrochloric acid according to a part, stirring and refluxing the bentonite at a temperature of 95 ℃ for five hours, adjusting the PH value of the bentonite, and drying a filter cake to obtain acidified bentonite;
s3: sodium modification of bentonite: adopting NazCO3 as a sodium treatment agent, keeping the temperature at 60 ℃ under the conditions that the dosage of the sodium treatment agent is 2% and the mass fraction of ore pulp is 10%, heating and stirring for 1 hour, standing and ageing for 24 hours, carrying out suction filtration, and drying the treated sodium bentonite in an environment of 105 ℃ after the suction filtration is finished, so as to prepare sodium bentonite as an organically modified raw material at one time;
s4: organic modification of bentonite: preparing bentonite into 10% suspension, adding 40% modifier ethanolamine, stirring at 70-80 ℃ for 2 hours, suction filtering, drying at 105 ℃, and grinding to obtain carbon dioxide adsorbent.
5. The process for preparing a carbon dioxide adsorbent according to claim 4, wherein: when the bentonite is purified, the pH of the bentonite needs to be adjusted to 4 after HCI is added.
6. The process for preparing a carbon dioxide adsorbent according to claim 4, wherein: after the acidification is finished, the mixture is subjected to reduced pressure suction filtration, and then deionized water is used for washing the supernatant until the PH=3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410091404.XA CN117839622A (en) | 2024-01-23 | 2024-01-23 | Carbon dioxide adsorbent and preparation process thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410091404.XA CN117839622A (en) | 2024-01-23 | 2024-01-23 | Carbon dioxide adsorbent and preparation process thereof |
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| Publication Number | Publication Date |
|---|---|
| CN117839622A true CN117839622A (en) | 2024-04-09 |
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| CN202410091404.XA Pending CN117839622A (en) | 2024-01-23 | 2024-01-23 | Carbon dioxide adsorbent and preparation process thereof |
Country Status (1)
| Country | Link |
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| CN (1) | CN117839622A (en) |
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- 2024-01-23 CN CN202410091404.XA patent/CN117839622A/en active Pending
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