CN108394950A - A kind of new method of absorption noble metal gold ion - Google Patents
A kind of new method of absorption noble metal gold ion Download PDFInfo
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- CN108394950A CN108394950A CN201810260624.5A CN201810260624A CN108394950A CN 108394950 A CN108394950 A CN 108394950A CN 201810260624 A CN201810260624 A CN 201810260624A CN 108394950 A CN108394950 A CN 108394950A
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- 238000000034 method Methods 0.000 title claims abstract description 29
- 239000010931 gold Substances 0.000 title claims abstract description 28
- 238000010521 absorption reaction Methods 0.000 title claims description 9
- 229910052737 gold Inorganic materials 0.000 title abstract description 6
- 229910000510 noble metal Inorganic materials 0.000 title abstract description 6
- 238000001179 sorption measurement Methods 0.000 claims abstract description 60
- 239000003463 adsorbent Substances 0.000 claims abstract description 20
- 239000000463 material Substances 0.000 claims abstract description 20
- 239000007864 aqueous solution Substances 0.000 claims abstract description 11
- 238000000926 separation method Methods 0.000 claims abstract description 8
- -1 zeolite imidazole esters Chemical class 0.000 claims abstract description 7
- 239000000243 solution Substances 0.000 claims description 36
- 239000013154 zeolitic imidazolate framework-8 Substances 0.000 claims description 32
- MFLKDEMTKSVIBK-UHFFFAOYSA-N zinc;2-methylimidazol-3-ide Chemical compound [Zn+2].CC1=NC=C[N-]1.CC1=NC=C[N-]1 MFLKDEMTKSVIBK-UHFFFAOYSA-N 0.000 claims description 32
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 12
- 238000003795 desorption Methods 0.000 claims description 12
- RAXXELZNTBOGNW-UHFFFAOYSA-N imidazole Natural products C1=CNC=N1 RAXXELZNTBOGNW-UHFFFAOYSA-N 0.000 claims description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 11
- WEVYAHXRMPXWCK-UHFFFAOYSA-N Acetonitrile Chemical compound CC#N WEVYAHXRMPXWCK-UHFFFAOYSA-N 0.000 claims description 9
- 239000000203 mixture Substances 0.000 claims description 7
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical group CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 6
- 229910003803 Gold(III) chloride Inorganic materials 0.000 claims description 6
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 6
- RJHLTVSLYWWTEF-UHFFFAOYSA-K gold trichloride Chemical compound Cl[Au](Cl)Cl RJHLTVSLYWWTEF-UHFFFAOYSA-K 0.000 claims description 6
- 229940076131 gold trichloride Drugs 0.000 claims description 6
- 239000012621 metal-organic framework Substances 0.000 claims description 6
- 239000003795 chemical substances by application Substances 0.000 claims description 4
- 239000002904 solvent Substances 0.000 claims description 4
- 238000003756 stirring Methods 0.000 claims description 4
- UMGDCJDMYOKAJW-UHFFFAOYSA-N thiourea Chemical compound NC(N)=S UMGDCJDMYOKAJW-UHFFFAOYSA-N 0.000 claims description 4
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Natural products NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims description 2
- 239000003960 organic solvent Substances 0.000 claims description 2
- 239000003495 polar organic solvent Substances 0.000 claims description 2
- 230000008929 regeneration Effects 0.000 claims description 2
- 238000011069 regeneration method Methods 0.000 claims description 2
- 239000011148 porous material Substances 0.000 abstract description 7
- 238000004064 recycling Methods 0.000 abstract description 6
- 229910021536 Zeolite Inorganic materials 0.000 abstract description 3
- 239000010457 zeolite Substances 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 abstract 1
- 238000003912 environmental pollution Methods 0.000 abstract 1
- 239000002594 sorbent Substances 0.000 abstract 1
- 238000010189 synthetic method Methods 0.000 abstract 1
- 239000010970 precious metal Substances 0.000 description 12
- 230000008901 benefit Effects 0.000 description 6
- 238000001035 drying Methods 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000002474 experimental method Methods 0.000 description 4
- LXBGSDVWAMZHDD-UHFFFAOYSA-N 2-methyl-1h-imidazole Chemical compound CC1=NC=CN1 LXBGSDVWAMZHDD-UHFFFAOYSA-N 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 230000018109 developmental process Effects 0.000 description 3
- 238000001914 filtration Methods 0.000 description 3
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 238000000967 suction filtration Methods 0.000 description 3
- XIOUDVJTOYVRTB-UHFFFAOYSA-N 1-(1-adamantyl)-3-aminothiourea Chemical compound C1C(C2)CC3CC2CC1(NC(=S)NN)C3 XIOUDVJTOYVRTB-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000012512 characterization method Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 230000035484 reaction time Effects 0.000 description 2
- 238000003786 synthesis reaction Methods 0.000 description 2
- 238000001291 vacuum drying Methods 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 241000282414 Homo sapiens Species 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- PTFCDOFLOPIGGS-UHFFFAOYSA-N Zinc dication Chemical compound [Zn+2] PTFCDOFLOPIGGS-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 238000009388 chemical precipitation Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000005342 ion exchange Methods 0.000 description 1
- 238000005374 membrane filtration Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
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- 238000012986 modification Methods 0.000 description 1
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- 239000002994 raw material Substances 0.000 description 1
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- 229940088594 vitamin Drugs 0.000 description 1
- 229930003231 vitamin Natural products 0.000 description 1
- 235000013343 vitamin Nutrition 0.000 description 1
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/285—Treatment of water, waste water, or sewage by sorption using synthetic organic sorbents
-
- 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
- B01J20/22—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising organic material
- B01J20/223—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising organic material containing metals, e.g. organo-metallic compounds, coordination complexes
- B01J20/226—Coordination polymers, e.g. metal-organic frameworks [MOF], zeolitic imidazolate frameworks [ZIF]
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
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- Chemical & Material Sciences (AREA)
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Inorganic Chemistry (AREA)
- Analytical Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
- Treatment Of Liquids With Adsorbents In General (AREA)
Abstract
Invention describes the new methods that a kind of porous material adsorbs Au in aqueous solution (III), i.e. using there is the class zeolite imidazole esters material ZIF 8 for the characteristics such as high porosity, high-specific surface area, stability are strong and duct is adjustable as adsorbent, Au (III) ion is adsorbed in aqueous solution.By the pH value of selective regulation aqueous solution, adsorption temp, gold ion concentration, quantity of sorbent, adsorption time, ZIF 8 can be made to greatly improve the adsorbance of Au (III), maximal absorptive capacity is more than 1000 mg/g.Compared with other adsorption separation technologies, the adsorbent synthetic method is simple, and large amount of adsorption, material is reusable, and environmental pollution is small, and a kind of feasible new method is provided for the recycling of noble metal.
Description
Technical Field
The invention belongs to the field of precious metal separation and recovery, and particularly relates to a method for adsorbing and separating Au (III) ions in an aqueous solution by using a zeolite-like imidazole ester material ZIF-8.
Background
The precious metals are low in content and dispersed in nature and are generally intergrown with other deposits, so that the precious metals obtained by the traditional method are mainly obtained from byproducts of some smelting processes, and the yield of the precious metals is difficult to improve. In order to cope with the contradiction between the supply and demand of the precious metal resources, the recovery and recycling of precious metals from secondary resources is a future development direction. Most of the precious metals produced by human beings enter the fields of life and industry, and the recycling market is extremely large. Therefore, there is an increasing interest in the recovery and recycling of precious metals, such as used precious metals from used electronic products, deactivated chemical catalysts, and mineral mining. The method not only can repeatedly use the scarce resources, but also can bring huge economic benefits to the society, play a certain role in environmental protection, be beneficial to building an ecological civilized society and promote the national economic development and scientific and technological progress.
The gold has excellent physical and chemical properties, such as high temperature oxidation resistance, corrosion resistance, electrical resistance, good conductivity, higher catalytic activity, stronger coordination ability and the like. Gold has a wide range of applications in industrial applications, known as industrial vitamins. The commercial value of gold has been greatly expanded by continuing stimulation of supply shortages and high industrial demand.
At present, methods applied to the separation of noble metals include adsorption, chemical precipitation, ion exchange, membrane filtration, electrolysis, biological treatment, and the like. Among the above methods, the adsorption method is widely used for separation of noble metals because of its advantages of low running cost, little influence on environment, simple operation, easy industrialization, etc. Currently, the biological adsorption method is researched mostly, and is an adsorption method with great development potential due to wide sources, low price, environmental protection and cleanness, but the biological adsorbent is weak in adsorption capacity, low in adsorption rate, complex in adsorption process, poor in recycling performance, low in selectivity, easy to be affected by impurities and ineffective, and currently, the biological adsorption method is still basically in a laboratory stage. Therefore, the search for new adsorbent materials with high-efficiency adsorption performance and high-efficiency recycling performance has potential application value and commercial value.
Metal-organic frameworks (MOFs) are porous materials formed by self-assembly of metal ions and organic ligands, have the characteristics of high pore structure, high specific surface area, adjustable pore size and the like, and are receiving increasing attention in various fields such as gas storage, separation, catalysis, drug release and the like, particularly in the field of separation methods. ZIF-8 is a novel zeolite imidazole ester-like metal organic framework porous material, which is formed by self-assembling zinc ions serving as a metal center and 2-methylimidazole. ZIF-8 has many advantages, such as permanence of pore channel, regular structure, high thermal stability, good chemical stability, etc., and thus has received extensive attention and application.
In the research, ZIF-8 is used as a novel precious metal adsorbent to adsorb and separate Au (III) in an aqueous solution. The influence of different factors on the adsorption effect, such as pH value, temperature, adsorption time, initial concentration and the like, is researched, and a new method is provided for the adsorption of the noble metal.
Disclosure of Invention
The invention aims to provide a novel precious metal Au adsorbent with large adsorption capacity, high stability and good regeneration performance, namely a zeolite imidazole ester metal organic framework porous material ZIF-8, and the novel precious metal Au adsorbent is applied to the adsorption separation of Au (III) in an aqueous solution. Aiming at the adsorption process, the influence of various conditions on the adsorption effect is explored.
The technical scheme adopted by the invention is as follows:
(1) synthesis of ZIF-8: a certain amount of zinc nitrate hexahydrate and 2-methylimidazole are mixed and completely dissolved in a certain amount of DMF solution (the molar ratio is 1:3:3), the reaction temperature is 140 ℃, and the reaction time is 24 hours. And after the reaction is finished, cooling to room temperature, performing suction filtration to obtain synthesized solid powder, washing with methanol for three times, and drying in a vacuum drying oven at 80 ℃ overnight to obtain the ZIF-8 product. According to XRD characterization, as shown in an attached figure 1 of the specification, the crystal structure of the prepared ZIF-8 is consistent with that of a standard card of the ZIF-8, and the ZIF-8 which is a zeolite-like imidazole ester metal organic framework material is successfully prepared. (2) Preparing Au (III) solution with a certain concentration, adjusting different pH values, adding a certain amount of ZIF-8 as an adsorbent, placing the solution in a constant-temperature water bath oscillator at a certain temperature, fully stirring for a certain time, taking a certain amount of samples after adsorption is finished, performing concentration determination before and after adsorption by using an atomic absorption spectrometer, and calculating the adsorption capacity and the adsorption rate. (3) Adding a certain amount of adsorbed ZIF-8 material into a certain amount of organic solvent, placing the mixture in a constant-temperature water area oscillator at a certain temperature, fully stirring for a certain time, filtering and drying after desorption, and carrying out next adsorption.
Compared with the prior art, the invention has the following advantages:
(1) the ZIF-8 material has larger specific surface area and higher adsorption capacity, can effectively adsorb Au (III) ions in an aqueous solution, and the adsorption capacity reaches over 1000 mg/g. (2) The ZIF-8 material can be repeatedly recycled after desorption, is an economical material, can reduce waste pollution and brings higher economic benefit. (3) The novel adsorbent ZIF-8 has the advantages of mild synthesis conditions, simple method and low raw material cost.
[ description of the drawings ]
Fig. 1 is an XRD characterization pattern.
[ detailed description ] according to the present embodiment
Preparation of mono, ZIF-8
380 mg of zinc nitrate hexahydrate and 315 mg of 2-methylimidazole are added into a 500 mL three-neck flask, 300 mL of DMF solvent is added, and the mixture is stirred until the mixture is completely dissolved; the three-neck flask is placed in an oil bath pot for heating, the reaction temperature is 140 ℃, and the reaction time is 24 hours. After the reaction is finished, cooling to room temperature, performing suction filtration to obtain synthesized solid powder, washing with 30 mL of methanol solvent for three times, and performing suction filtration; and (3) drying the solid in a vacuum drying oven at 80 ℃ overnight to obtain the ZIF-8 product.
Second, adsorption experiment and adsorbent cyclic utilization experiment
(1) Adsorption experiment: preparing Au (III) solution (10-1000 mg/L) with a certain concentration by using gold trichloride with the purity of 98%, adjusting the pH (2.5-12) of the aqueous solution by using sodium hydroxide or HCl with the concentration of 0.1 mol/L, adding a certain volume of the solution into a centrifuge tube or a conical flask, adding a certain amount of ZIF-8 serving as an adsorbent (0.2-1 mg/mL), placing the solution in a constant-temperature water bath oscillator at a certain temperature (5-80 ℃) for fully stirring for a certain time (5-2880 min), after adsorption is finished, taking a certain amount of samples, measuring the concentrations of the original solution and the residual solution after adsorption by using an atomic absorption spectrometer, and calculating the adsorption capacity and the adsorption rate. (2) Adsorbent recycle experiment: adding a certain volume (10-50 mL) of polar organic solvent (methanol or ethanol or acetonitrile or thiourea) into a 50mL centrifuge tube as a desorption agent, adding 10 mg of adsorbed ZIF-8 material, placing the mixture in a constant-temperature water bath oscillator for oscillating desorption, setting a certain temperature (15-55 ℃) for 1-45 h, filtering and drying, and adsorbing the desorbed ZIF-8 material again.
Third, testing and analyzing
In the embodiment of the invention, the concentration of Au in the solution is analyzed by adopting an AA-6880 atomic absorption spectrophotometer Japan. The related calculation formulas of the adsorption quantity and the adsorption rate are as follows:
wherein,qdenotes the amount of adsorption, subscript 0 denotes the initial value, and subscript t denotes time t.
Second, example
Example 1
Preparing Au (III) solution with the concentration of 300 mg/L by using gold trichloride with the purity of 98%, adding 100 mL of the solution into a 250 mL conical flask, adjusting the pH to 2.5 by using 0.1 mol/L HCl, adding 50 mg of ZIF-8 material as an adsorbent, placing the solution into a constant-temperature water bath oscillator for oscillating and adsorbing, setting the temperature to be 25 ℃, performing fixed-point sampling detection, measuring the concentrations of the original solution and the residual solution after adsorption by using an atomic absorption spectrometer, and after 42 hours, obtaining the adsorption capacity of 434 mg/L and the adsorption rate of 68%.
Example 2
Preparing Au (III) solution with the concentration of 300 mg/L by using gold trichloride with the purity of 98%, adding 20 mL of the solution into a 50mL centrifuge tube, adjusting the pH to 5 by using 0.1 mol/L HCl, adding 10 mg of ZIF-8 material as an adsorbent, placing the solution into a constant-temperature water bath oscillator for oscillating adsorption, setting the temperature to be 25 ℃, and after 42 hours, taking a certain amount of sample, and measuring the concentrations of the original solution and the residual solution after adsorption by using an atomic absorption spectrometer, wherein the adsorption amount is 208 mg/L, and the adsorption rate is 42%.
Example 3
Preparing Au (III) solution with the concentration of 400 mg/L by using gold trichloride with the purity of 98%, adding 20 mL of the Au (III) solution into a 50mL centrifuge tube, adjusting the pH to 2.5 by using 0.1 mol/L HCl, adding 10 mg of ZIF-8 material as an adsorbent, placing the solution into a constant-temperature water bath oscillator for oscillating adsorption, setting the temperature to be 45 ℃, and after 42 hours, taking a certain amount of sample, and measuring the concentrations of the original solution and the residual solution after adsorption by using an atomic absorption spectrometer, wherein the adsorption amount is 580 mg/L, and the adsorption rate is 68%.
Example 4
Preparing an Au (III) solution with the concentration of 900 mg/L by using gold trichloride with the purity of 98%, adding 20 mL of the Au (III) solution into a 50mL centrifuge tube, adjusting the pH to 2.5 by using 0.1 mol/L HCl, adding 10 mg of ZIF-8 material as an adsorbent, placing the solution into a constant-temperature water bath oscillator for oscillating adsorption, setting the temperature to be 25 ℃, taking a certain amount of sample after 42 h, and measuring the concentrations of the original solution and the residual solution after adsorption by using an atomic absorption spectrometer, wherein the adsorption amount is 1192 mg/L, and the adsorption rate is 66%.
Example 5
Adding 20 mL of acetonitrile into a 50mL centrifuge tube as a desorption agent, adding 10 mg of the adsorbed ZIF-8 material, placing the mixture in a constant-temperature water bath oscillator for oscillating desorption, setting the temperature at 25 ℃, filtering and drying after 42 hours, and adsorbing the desorbed ZIF-8 material again. After repeated use twice, the adsorption capacity is reduced from 317.38 mg/g to 271.92 mg/g.
The above examples merely express several embodiments of the present invention, and the description thereof is more specific and detailed, but the technical scope thereof is not limited to the above embodiments. It will be apparent to those skilled in the art that various modifications and embodiments can be made without departing from the spirit of the invention, and these are within the scope of the invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (11)
1. A new method for adsorbing Au (III) in an aqueous solution by utilizing a zeolite-like imidazole ester metal organic framework material ZIF-8 is characterized in that the adsorption separation of Au in the aqueous solution is firstly proposed by adopting ZIF-8 as an adsorbent, the adsorption capacity can reach 1192 mg/g through exploration conditions, and the novel adsorbent has good regeneration performance and can be recycled.
2. The method according to claim 1, characterized in that it comprises the following operations: preparing Au (III) solution with a certain concentration by using gold trichloride with the purity of 98%, adjusting the pH value of the aqueous solution by using 0.1 mol/L sodium hydroxide or HCl, adding a certain volume of the solution into a centrifuge tube or a conical flask, adding a certain amount of ZIF-8 serving as an adsorbent, placing the solution into a constant-temperature water bath oscillator at a certain temperature, fully stirring for a certain time, taking a certain amount of sample after adsorption is finished, measuring the concentrations of the original solution and the residual solution after adsorption by using an atomic absorption spectrometer, and calculating the adsorption capacity and the adsorption rate; an organic solvent is used as a desorption agent, the repeated performance of the ZIF-8 is researched, a certain volume of polar organic solvent is added into a 50mL centrifugal tube to be used as the desorption agent, 10 mg of adsorbed ZIF-8 material is added, the mixture is placed in a constant-temperature water bath oscillator to be oscillated and desorbed, a certain temperature is set, after a certain time, the mixture is filtered and dried, and the desorbed ZIF-8 material is adsorbed again.
3. The method of claim 2, wherein the Au concentration is configured to be 10-1000 mg/L.
4. The method of claim 2, wherein the pH of the solution is set to 2.5 to 12.
5. The method of claim 2, wherein the amount of adsorbent is 0.1-1 mg per ml of solution.
6. The process of claim 2, wherein the adsorption temperature is 5 to 80 ℃.
7. The process according to claim 2, wherein the adsorption time is 5 to 2880 min.
8. The method of claim 2, wherein the desorption solvent is selected from ethanol, methanol, acetonitrile, and thiourea.
9. The method of claim 2, wherein the volume of the desorption solvent is 10-50 mL.
10. The process of claim 2, wherein the desorption time is 1 to 45 hours.
11. The process of claim 2, wherein the desorption temperature is 15 to 55%oC。
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110314667A (en) * | 2019-06-30 | 2019-10-11 | 湖南理工学院 | A kind of preparation and its application of metal organic polymer material |
| CN110483800A (en) * | 2019-09-07 | 2019-11-22 | 湖南理工学院 | A kind of preparation and its application of the metal-organic framework material containing S |
| CN114733495A (en) * | 2022-04-08 | 2022-07-12 | 华北水利水电大学 | Preparation method and application of solvent-free extracting agent for recycling Au (III) |
| CN114797991A (en) * | 2022-03-24 | 2022-07-29 | 北京化工大学 | Rubber hydrogenation catalyst, preparation method, recovery method and application thereof |
| CN114920893A (en) * | 2022-05-05 | 2022-08-19 | 潍坊学院 | Synthesis of cationic porphyrin-based porous organic polymers from bottom-up for efficient and selective recovery of gold |
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