CN112691650B - Adsorbent and preparation method and application thereof - Google Patents
Adsorbent and preparation method and application thereof Download PDFInfo
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- CN112691650B CN112691650B CN201911013692.2A CN201911013692A CN112691650B CN 112691650 B CN112691650 B CN 112691650B CN 201911013692 A CN201911013692 A CN 201911013692A CN 112691650 B CN112691650 B CN 112691650B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/30—Processes for preparing, regenerating, or reactivating
- B01J20/3078—Thermal treatment, e.g. calcining or pyrolizing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/10—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising silica or silicate
- B01J20/103—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising silica or silicate comprising silica
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/10—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising silica or silicate
- B01J20/16—Alumino-silicates
- B01J20/18—Synthetic zeolitic molecular sieves
- B01J20/186—Chemical treatments in view of modifying the properties of the sieve, e.g. increasing the stability or the activity, also decreasing the activity
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/30—Processes for preparing, regenerating, or reactivating
- B01J20/3007—Moulding, shaping or extruding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/30—Processes for preparing, regenerating, or reactivating
- B01J20/32—Impregnating or coating ; Solid sorbent compositions obtained from processes involving impregnating or coating
- B01J20/3231—Impregnating or coating ; Solid sorbent compositions obtained from processes involving impregnating or coating characterised by the coating or impregnating layer
- B01J20/3234—Inorganic material layers
- B01J20/3236—Inorganic material layers containing metal, other than zeolites, e.g. oxides, hydroxides, sulphides or salts
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
- B01D2253/25—Coated, impregnated or composite adsorbents
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/50—Carbon oxides
- B01D2257/502—Carbon monoxide
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- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/151—Reduction of greenhouse gas [GHG] emissions, e.g. CO2
Abstract
The invention provides a preparation method of an adsorbent, which comprises the following steps: a) contacting the carrier with a mixed solution of an aluminum source solution, a sodium source solution and silica sol to prepare a modified carrier; b) mixing and molding the modified carrier and the metal additive to prepare an adsorbent precursor; and c) roasting the adsorbent precursor to prepare the adsorbent. The mechanical strength of the adsorbent can be improved by pretreating the mixed solution of the aluminum source solution, the sodium source solution and the silica sol and adding the metal additive, the utilization efficiency of the adsorbent is effectively improved, and the production cost is reduced.
Description
Technical Field
The invention relates to the technical field of chemical industry, in particular to an adsorbent and a preparation method and application thereof.
Background
Pressure Swing Adsorption (PSA) is a gas separation technology that has been industrially newly developed in recent decades, and the basic principle thereof is to realize gas separation or purification through a periodic Pressure shift process by using the difference of Adsorption characteristics of mixed gas components on a solid material and the characteristic that the Adsorption amount changes with the change of Pressure. The technology developed rapidly in the sixties of the last century. Because the earliest adsorbent has lower adsorption capacity and poorer selectivity, the adsorption separation is only used for moisture absorption drying, decolorization, deodorization and drinking water purification, and the adsorbent is usually disposable and has higher energy consumption when in use.
The first non-thermal adsorptive drying and air purification (removal) was published in 1942 in GermanyCO 2 And H 2 O), Skarstrom in 1959, invented a PSA gas separation technique (at the time called "isothermal adsorption" or "non-thermal adsorption"). In the early 60 s of the last century, united states combined carbide (UCC) realized industrialization of pressure swing adsorption four-bed process technology for the first time under the condition of world energy crisis, and in 1966, a first set of industrial device for recovering high-purity hydrogen from hydrogen-containing industrial gas by PSA (pressure swing adsorption) was built.
United states carbide united states patent US3497462 discloses the separation of carbon monoxide or ethylene using a molecular sieve having a monovalent copper cation as the adsorbent. The molecular sieve is prepared by exchanging a cuprous salt solution with sodium ions in the molecular sieve. The amount of carbon monoxide or ethylene adsorbed by such molecular sieves is not high due to the insufficient amount of exchangeable and exchanged cuprous ions, and it is reported that 1.7 mmol/g of adsorbent can adsorb carbon monoxide or ethylene at 25 c and a carbon monoxide partial pressure of 99 mmHg.
CN106215911B discloses a high efficiency adsorbent for separating CO and a preparation method thereof, the preparation method comprises the following steps: weighing a predetermined amount of silica sol, adding a water source for dilution, then sequentially dropwise adding an aluminum source solution, a sodium source solution and a copper source solution into the diluted silica sol, and uniformly stirring to obtain a liquid mixture; aging the liquid mixture at room temperature for 6-10 hours, then adding the liquid mixture into a high-pressure reaction kettle, continuously stirring the liquid mixture at the temperature of 95-110 ℃, taking out the liquid mixture after crystallization for 7-12 hours, washing and filtering the liquid mixture to obtain a solid; and (3) drying the solid at 100-120 ℃ in vacuum, and roasting at 400-500 ℃ for 4-6 hours in a nitrogen atmosphere to obtain the efficient adsorbent for separating CO.
CN201310520699.X discloses a 13X type molecular sieve of an adsorbent for CO adsorption, and a preparation method and application thereof. The 13X type molecular sieve mainly comprises the following components: SiO 2 2 The mass percentage of the sodium silicate is 24-26 percent and Na 2 Silica sol with the mass percentage of O of 0.042-0.0485%; with Al 2 O 3 The mass of the aluminum source is SiO 2 34-56.67% of the mass as Na 2 Calculated by O, the mass of the sodium source is SiO 2 1.03-1.55 times of the mass as H 2 The meter O is used for measuring the total oxygen content,the water source has a mass of Na 2 10.16-15.97 times of the mass of O.
CN201710037992.9 relates to a supported cuprous chloride adsorbent, a preparation method and application thereof, and belongs to the field of petrochemical industry. The carrier is ordered mesoporous silicon KIT-6; the active component is CuCl; the loading amount of the active component of the carrier is 2 mmol/g-5 mmol/g, preferably 3 mmol/g-4 mmol/g. The adsorbent is simple to prepare, controllable in process and simple to operate, meets the requirement of industrial treatment, and can be effectively applied to separation of ethylene and ethane in petroleum refining gas and enrichment of ethylene in catalytic cracking gas.
The adsorbent prepared by the above patents has low mechanical strength, and the carrier is not pretreated, so that the adsorption efficiency is low.
Disclosure of Invention
In view of the problems in the prior art, an object of the present invention is to provide a method for preparing an adsorbent, in which the mechanical strength of the adsorbent is improved by using a mixed solution of an aluminum source solution, a sodium source solution and a silica sol having specific concentrations for pretreatment and adding a metal additive during the preparation process, the utilization efficiency of the adsorbent is effectively improved, and the production cost is reduced. The second purpose of the invention is to provide an adsorbent corresponding to the preparation method. The invention also aims to provide application of the adsorbent in the field of CO adsorption.
One aspect of the present invention provides a method for preparing an adsorbent, comprising:
a) contacting the carrier with a mixed solution of an aluminum source solution, a sodium source solution and silica sol to prepare a modified carrier;
b) mixing and molding the modified carrier and the metal additive to prepare an adsorbent precursor; and
c) roasting the adsorbent precursor to prepare the adsorbent;
preferably, the mass concentration of the aluminum source solution is 30-60%, preferably 35-50%, and more preferably 40-45%; the mass concentration of the sodium source solution is 10-55%, preferably 20-45%, and more preferably 25-40%; SiO in the silica sol 2 The mass content of (A) is 20% -60%, preferably 30% -50%; preferably, the volume ratio of the aluminum source solution, the sodium source solution, the silica sol and the carrier is (1-100): 1, preferably (5-50): 1.
The inventor of the present application has unexpectedly found in the research that the use of the aluminum source solution, the sodium source solution and the silica sol at specific concentrations can significantly enhance the strength of the adsorbent and effectively increase the adsorption amount. The performance of the adsorbent can be further optimized by adjusting the volume ratio of the aluminum source solution, the sodium source solution, the silica sol and the carrier.
In some preferred embodiments of the present invention, the support is selected from at least one of porous silica, a-type molecular sieves, X-type molecular sieves, Y-type molecular sieves, ZSM-type molecular sieves, mordenite, and aluminum phosphate molecular sieves.
In some preferred embodiments of the present invention, the aluminum source solution is selected from at least one of an aluminum sulfate solution, a sodium aluminate solution, and an aluminum isopropoxide solution; and/or the sodium source solution is at least one of a sodium hydroxide solution and a sodium carbonate solution.
In some preferred embodiments of the present invention, in step a), the modified support is placed in the mixed solution for impregnation treatment.
In some preferred embodiments of the present invention, in step a), the impregnation treatment conditions include: the temperature is 30-100 ℃; the time is 1h-24 h.
In some preferred embodiments of the present invention, in step a), the impregnation treatment conditions include: the temperature is 40-80 ℃; the time is 1h-6 h.
In some preferred embodiments of the invention, in step b), the metal additive comprises a copper source, a potassium source and a magnesium source.
In some preferred embodiments of the present invention, the copper source is selected from at least one of cuprous chloride, cupric nitrate, cupric chloride, and cupric acetate; the potassium source is at least one of potassium hydroxide and potassium carbonate; the magnesium source is at least one of magnesium hydroxide and magnesium carbonate.
In some preferred embodiments of the invention, the copper source is used in an amount of 10 wt% to 50 wt%, the potassium source is used in an amount of 1 wt% to 20 wt%, and the magnesium source is used in an amount of 1 wt% to 20 wt%, based on the mass of the modified support.
According to the present invention, when the modified carrier and the metal additive are mixed and molded, an appropriate amount of water may be added as needed. The amount of water added is such that it is convenient for mixing and shaping.
According to the present invention, the modified support obtained in step a) may be subjected to washing with water and drying treatment, followed by step b).
According to the present invention, step c) may be performed after the adsorbent precursor prepared in step b) is left to stand and dried.
According to the present invention, the adsorbent prepared in step c) may be subjected to a soaking treatment using a hydrochloric acid solution, and then subjected to a washing and drying treatment after the soaking treatment.
In some preferred embodiments of the present invention, the temperature of the calcination treatment is from 100 ℃ to 400 ℃.
In some preferred embodiments of the present invention, the temperature of the calcination treatment is from 200 ℃ to 300 ℃.
According to the invention, the time of the roasting treatment is 2h-24h, preferably 3h-12 h.
In still another aspect, the present invention provides an adsorbent prepared according to the above-described preparation method.
The invention further provides an application of the adsorbent in the field of CO adsorption.
When the adsorbent prepared by the preparation method provided by the invention is applied to the field of CO adsorption, the adsorption quantity of CO can reach more than 2 mmol/g. In addition, the mechanical strength of the adsorbent provided by the invention can reach more than 75N.
Detailed Description
The present invention will be described in detail below with reference to examples, but the scope of the present invention is not limited to the following description.
In the following embodiments, the strength of the adsorbent is measured using a particle strength tester.
Example 1
Preparing an aluminum sulfate solution with the mass concentration of 40%, a sodium hydroxide solution with the mass concentration of 35% and SiO 2 The mass content of the silica sol is 40%, and the aluminum sulfate solution, the sodium hydroxide solution, the silica sol and the X-type molecular sieve are mixed according to the weight ratio of 1: 1: 1: 5, soaking for 3 hours at the temperature of 60 ℃, washing and drying to obtain the modified carrier.
Weighing 10g of modified carrier, 3g of cuprous chloride, 1g of potassium carbonate, 1g of magnesium carbonate and a proper amount of water, mixing, stirring uniformly, extruding into strips, standing, and drying to obtain the adsorbent precursor.
And (3) placing the prepared adsorbent precursor into a muffle furnace, roasting for 5 hours at 200 ℃, soaking by using a hydrochloric acid solution with the mass fraction of 5%, washing with water, and drying to obtain the adsorbent A.
The mechanical strength and the carbon monoxide adsorption amount at 18 ℃ and a carbon monoxide pressure of 760mmHg of the adsorbent A were measured, and the results are shown in Table 1.
Example 2
Preparing 45 mass percent aluminum isopropoxide solution, 30 mass percent sodium hydroxide solution and SiO 2 The mass content of the silica sol is 40%, and the aluminum isopropoxide solution, the sodium hydroxide solution, the silica sol and the Y-type molecular sieve are mixed according to the weight ratio of 1: 1: 1: 7, soaking for 2 hours at 50 ℃, washing with water and drying to obtain the modified carrier.
Weighing 10g of modified carrier, 2g of cuprous chloride, 0.5g of potassium carbonate, 1g of magnesium hydroxide and a proper amount of water, mixing, stirring uniformly, extruding into strips, standing, and drying to obtain the adsorbent precursor.
And placing the prepared adsorbent precursor into a muffle furnace, roasting at 200 ℃ for 5 hours, soaking by using a hydrochloric acid solution with the mass fraction of 5%, washing by water, and drying to obtain the adsorbent B.
The mechanical strength and the carbon monoxide adsorption amount at 18 ℃ and a carbon monoxide pressure of 760mmHg of the adsorbent B were measured, and the results are shown in Table 1.
Example 3
Adsorbent C was prepared as in example 1, except that aluminum acetate was used instead of aluminum sulfate in example 1.
The mechanical strength and the carbon monoxide adsorption amount at 18 ℃ and a carbon monoxide pressure of 760mmHg of the adsorbent C were measured, and the results are shown in Table 1.
Example 4
Adsorbent D was prepared as in example 1, except that aluminum formate was used instead of aluminum sulfate in example 1.
The mechanical strength and the amount of carbon monoxide adsorbed at 18 ℃ and a carbon monoxide pressure of 760mmHg of the adsorbent D were measured, and the results are shown in Table 1.
Example 5
Adsorbent E was prepared as in example 1, except that aluminum sulfate in example 1 was replaced with aluminum propionate.
The mechanical strength and the carbon monoxide adsorption amount at 18 ℃ and a carbon monoxide pressure of 760mmHg of the adsorbent E were measured, and the results are shown in Table 1.
Example 6
An adsorbent F was produced in the same manner as in example 1 except that the aluminum sulfate solution having a mass concentration of 30% was used instead of the aluminum sulfate solution having a mass concentration of 40% in example 1.
The mechanical strength and the carbon monoxide adsorption amount at 18 ℃ and a carbon monoxide pressure of 760mmHg of the adsorbent F were measured, and the results are shown in Table 1.
Example 7
Adsorbent G was produced in the same manner as in example 1 except that the aluminum sulfate solution having a mass concentration of 40% in example 1 was replaced with an aluminum sulfate solution having a mass concentration of 60%.
The mechanical strength and the amount of carbon monoxide adsorbed at 18 ℃ and a carbon monoxide pressure of 760mmHg of the adsorbent G were measured, and the results are shown in Table 1.
Example 8
An adsorbent H was produced in the same manner as in example 1 except that the sodium hydroxide solution having a mass concentration of 10% was used instead of the sodium hydroxide solution having a mass concentration of 35% in example 1.
The mechanical strength and the carbon monoxide adsorption amount at 18 ℃ and a carbon monoxide pressure of 760mmHg of the adsorbent H were measured, and the results are shown in Table 1.
Example 9
An adsorbent I was produced in the same manner as in example 1 except that the sodium hydroxide solution having a mass concentration of 55% was used instead of the sodium hydroxide solution having a mass concentration of 35% in example 1.
The mechanical strength and the carbon monoxide adsorption amount at 18 ℃ and a carbon monoxide pressure of 760mmHg of the adsorbent I were measured, and the results are shown in Table 1.
Example 10
Adsorbent J was prepared as in example 1, except that SiO was used 2 20% by mass of silica sol in place of SiO in example 1 2 Is 40% by mass of silica sol.
The mechanical strength and the amount of carbon monoxide adsorbed at 18 ℃ and a carbon monoxide pressure of 760mmHg of the adsorbent J were measured, and the results are shown in Table 1.
Example 11
Adsorbent K was prepared as in example 1, except that SiO was used 2 Replacing SiO in example 1 with 60% by mass of silica sol 2 Is 40% by mass of silica sol.
The mechanical strength and the carbon monoxide adsorption amount at 18 ℃ and a carbon monoxide pressure of 760mmHg of the adsorbent K were measured, and the results are shown in Table 1.
Example 12
Adsorbent L was prepared in the manner as in example 1, except that the volume ratio of the aluminum sulfate solution, the sodium hydroxide solution, the silica sol and the type X molecular sieve was 1: 1: 1: 1.
the mechanical strength and the carbon monoxide adsorption amount at 18 ℃ and a carbon monoxide pressure of 760mmHg of the adsorbent L were measured, and the results are shown in Table 1.
Example 13
Adsorbent M was prepared in the manner as in example 1, except that the volume ratio of the aluminum sulfate solution, the sodium hydroxide solution, the silica sol and the type X molecular sieve was 1: 1: 1: 10.
the mechanical strength and the amount of carbon monoxide adsorbed at 18 ℃ and a carbon monoxide pressure of 760mmHg of the adsorbent M were measured, and the results are shown in Table 1.
Example 14
An adsorbent N was produced in the same manner as in example 1 except that the temperature of the calcination treatment was 450 ℃.
The mechanical strength and the carbon monoxide adsorption amount at 18 ℃ and a carbon monoxide pressure of 760mmHg of the adsorbent N were measured, and the results are shown in Table 1.
Comparative example 1
An adsorbent O was prepared in the same manner as in example 1 except that the carrier was not pretreated with the pretreatment liquid.
The mechanical strength and the carbon monoxide adsorption amount at 18 ℃ and a carbon monoxide pressure of 760mmHg of the adsorbent O were measured, and the results are shown in Table 1.
Comparative example 2
Adsorbent P was prepared as in example 1, except that aluminum sulfate was not used.
The mechanical strength and the carbon monoxide adsorption amount at 18 ℃ and a carbon monoxide pressure of 760mmHg of the adsorbent P were measured, and the results are shown in Table 1.
Comparative example 3
An adsorbent Q was produced in the same manner as in example 1 except that no silica sol was used.
The mechanical strength and the carbon monoxide adsorption amount at 18 ℃ and a carbon monoxide pressure of 760mmHg of the adsorbent Q were measured, and the results are shown in Table 1.
Comparative example 4
An adsorbent R was prepared as in example 1, except that sodium hydroxide was not used.
The mechanical strength and the carbon monoxide adsorption amount at 18 ℃ and a carbon monoxide pressure of 760mmHg of the adsorbent R were measured, and the results are shown in Table 1.
TABLE 1
According to the data in the table, the adsorbent prepared according to the technical scheme provided by the invention has higher mechanical strength and carbon monoxide adsorption capacity.
It should be noted that the above-mentioned embodiments are only for explaining the present invention, and do not constitute any limitation to the present invention. The present invention has been described with reference to exemplary embodiments, but the words which have been used herein are words of description and illustration, rather than words of limitation. The invention can be modified, as prescribed, within the scope of the claims and without departing from the scope and spirit of the invention. Although the invention has been described herein with reference to particular means, materials and embodiments, the invention is not intended to be limited to the particulars disclosed herein, but rather extends to all other methods and applications having the same functionality.
Claims (16)
1. A method of making an adsorbent comprising:
a) contacting the carrier with a mixed solution of an aluminum source solution, a sodium source solution and silica sol to prepare a modified carrier;
b) mixing and molding the modified carrier and the metal additive to prepare an adsorbent precursor; and
c) roasting the adsorbent precursor to prepare the adsorbent;
wherein the mass concentration of the aluminum source solution is 30-60%; the mass concentration of the sodium source solution is 10-55%; SiO in the silica sol 2 The mass content of the compound is 20-60 percent;
in step b), the metal additive comprises a copper source, a potassium source and a magnesium source.
2. The preparation method according to claim 1, wherein the mass concentration of the aluminum source solution is 35% to 50%; the sodium source solutionThe mass concentration of the liquid is 20-45%; SiO in the silica sol 2 The mass content of (A) is 30-50%.
3. The preparation method according to claim 1, wherein the mass concentration of the aluminum source solution is 40 to 45%; the mass concentration of the sodium source solution is 25-40%.
4. The method according to claim 1, wherein the volume ratio of the aluminum source solution, the sodium source solution, the silica sol and the carrier is (1-100): 1.
5. The preparation method according to claim 1, wherein the volume ratio of the aluminum source solution, the sodium source solution, the silica sol and the carrier is (5-50): 5-50: 1.
6. The method of claim 1, wherein the support is selected from at least one of porous silica, a type a molecular sieve, an X type molecular sieve, a Y type molecular sieve, a ZSM type molecular sieve, mordenite, and an aluminum phosphate molecular sieve.
7. The production method as claimed in any one of claims 1 to 6, wherein the aluminum source solution is at least one selected from the group consisting of an aluminum sulfate solution, a sodium aluminate solution and an aluminum isopropoxide solution; and/or the sodium source solution is at least one of a sodium hydroxide solution and a sodium carbonate solution.
8. The method according to any one of claims 1 to 6, wherein the modified carrier is contacted with the mixed solution in step a) by immersing the modified carrier in the mixed solution.
9. The method according to claim 8, wherein the conditions of the impregnation treatment include: the temperature is 30-100 ℃; the time is 1h-24 h.
10. The production method according to claim 8, wherein the conditions of the impregnation treatment include: the temperature is 40-80 ℃; the time is 1h-6 h.
11. The production method according to any one of claims 1 to 6, wherein the copper source is selected from at least one of cuprous chloride, cupric nitrate, cupric chloride and cupric acetate; the potassium source is at least one of potassium hydroxide and potassium carbonate; the magnesium source is at least one selected from magnesium hydroxide and magnesium carbonate.
12. The process according to any one of claims 1 to 6, wherein the copper source is used in an amount of 10 to 50 wt%, the potassium source is used in an amount of 1 to 20 wt%, and the magnesium source is used in an amount of 1 to 20 wt%, based on the mass of the modified support.
13. The method according to any one of claims 1 to 6, wherein the roasting treatment is carried out at a temperature of 100 ℃ to 400 ℃ for a time of 2h to 24 h.
14. The preparation method according to claim 13, wherein the roasting treatment is performed at a temperature of 200 ℃ to 300 ℃ for 3h to 12 h.
15. An adsorbent produced by the production method according to any one of claims 1 to 14.
16. Use of the adsorbent according to claim 15 in the field of CO adsorption.
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