CN111408338A - Silica gel rotating wheel adsorbing material for dehumidification and preparation method thereof - Google Patents
Silica gel rotating wheel adsorbing material for dehumidification and preparation method thereof Download PDFInfo
- Publication number
- CN111408338A CN111408338A CN202010184565.5A CN202010184565A CN111408338A CN 111408338 A CN111408338 A CN 111408338A CN 202010184565 A CN202010184565 A CN 202010184565A CN 111408338 A CN111408338 A CN 111408338A
- Authority
- CN
- China
- Prior art keywords
- silica gel
- dehumidification
- solution
- adsorbing material
- reaction
- 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.)
- Granted
Links
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 title claims abstract description 71
- 239000000741 silica gel Substances 0.000 title claims abstract description 68
- 229910002027 silica gel Inorganic materials 0.000 title claims abstract description 68
- 238000007791 dehumidification Methods 0.000 title claims abstract description 46
- 239000000463 material Substances 0.000 title claims abstract description 45
- 238000002360 preparation method Methods 0.000 title claims abstract description 20
- 235000019353 potassium silicate Nutrition 0.000 claims abstract description 41
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims abstract description 41
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 claims abstract description 26
- 239000000347 magnesium hydroxide Substances 0.000 claims abstract description 26
- 229910001862 magnesium hydroxide Inorganic materials 0.000 claims abstract description 26
- 239000002253 acid Substances 0.000 claims abstract description 19
- 159000000003 magnesium salts Chemical class 0.000 claims abstract description 15
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical class [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 claims abstract description 14
- 238000000034 method Methods 0.000 claims abstract description 10
- 239000000243 solution Substances 0.000 claims description 73
- 238000006243 chemical reaction Methods 0.000 claims description 60
- TWRXJAOTZQYOKJ-UHFFFAOYSA-L Magnesium chloride Chemical group [Mg+2].[Cl-].[Cl-] TWRXJAOTZQYOKJ-UHFFFAOYSA-L 0.000 claims description 38
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 26
- 238000003756 stirring Methods 0.000 claims description 25
- 238000001035 drying Methods 0.000 claims description 23
- 238000002791 soaking Methods 0.000 claims description 21
- 229910001629 magnesium chloride Inorganic materials 0.000 claims description 19
- 230000007935 neutral effect Effects 0.000 claims description 17
- 238000005406 washing Methods 0.000 claims description 15
- 239000003365 glass fiber Substances 0.000 claims description 14
- 239000012295 chemical reaction liquid Substances 0.000 claims description 10
- VSCWAEJMTAWNJL-UHFFFAOYSA-K aluminium trichloride Chemical group Cl[Al](Cl)Cl VSCWAEJMTAWNJL-UHFFFAOYSA-K 0.000 claims description 8
- 239000007864 aqueous solution Substances 0.000 claims description 3
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims 1
- 238000001179 sorption measurement Methods 0.000 abstract description 11
- 230000000694 effects Effects 0.000 abstract description 8
- 239000002244 precipitate Substances 0.000 abstract description 5
- 238000006460 hydrolysis reaction Methods 0.000 abstract description 3
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 abstract description 2
- 230000015572 biosynthetic process Effects 0.000 abstract description 2
- 230000008929 regeneration Effects 0.000 abstract description 2
- 238000011069 regeneration method Methods 0.000 abstract description 2
- 238000003786 synthesis reaction Methods 0.000 abstract description 2
- 238000013329 compounding Methods 0.000 abstract 1
- 229960002337 magnesium chloride Drugs 0.000 description 14
- 239000011521 glass Substances 0.000 description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 11
- 239000011148 porous material Substances 0.000 description 7
- 238000004321 preservation Methods 0.000 description 7
- 239000011248 coating agent Substances 0.000 description 5
- 238000000576 coating method Methods 0.000 description 5
- 238000001704 evaporation Methods 0.000 description 5
- 238000010521 absorption reaction Methods 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- -1 halogen salts Chemical class 0.000 description 4
- KWGKDLIKAYFUFQ-UHFFFAOYSA-M lithium chloride Chemical compound [Li+].[Cl-] KWGKDLIKAYFUFQ-UHFFFAOYSA-M 0.000 description 4
- 238000007789 sealing Methods 0.000 description 4
- 230000002378 acidificating effect Effects 0.000 description 3
- 230000008020 evaporation Effects 0.000 description 3
- 229910052736 halogen Inorganic materials 0.000 description 3
- 238000011065 in-situ storage Methods 0.000 description 3
- 229940050906 magnesium chloride hexahydrate Drugs 0.000 description 3
- DHRRIBDTHFBPNG-UHFFFAOYSA-L magnesium dichloride hexahydrate Chemical compound O.O.O.O.O.O.[Mg+2].[Cl-].[Cl-] DHRRIBDTHFBPNG-UHFFFAOYSA-L 0.000 description 3
- 238000006386 neutralization reaction Methods 0.000 description 3
- AMVQGJHFDJVOOB-UHFFFAOYSA-H aluminium sulfate octadecahydrate Chemical compound O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.[Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O AMVQGJHFDJVOOB-UHFFFAOYSA-H 0.000 description 2
- JGDITNMASUZKPW-UHFFFAOYSA-K aluminium trichloride hexahydrate Chemical compound O.O.O.O.O.O.Cl[Al](Cl)Cl JGDITNMASUZKPW-UHFFFAOYSA-K 0.000 description 2
- 229940063656 aluminum chloride Drugs 0.000 description 2
- 229940009861 aluminum chloride hexahydrate Drugs 0.000 description 2
- 239000003607 modifier Substances 0.000 description 2
- 230000035484 reaction time Effects 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 238000004026 adhesive bonding Methods 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 159000000013 aluminium salts Chemical class 0.000 description 1
- 229910000329 aluminium sulfate Inorganic materials 0.000 description 1
- 239000001164 aluminium sulphate Substances 0.000 description 1
- 235000011128 aluminium sulphate Nutrition 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- BUACSMWVFUNQET-UHFFFAOYSA-H dialuminum;trisulfate;hydrate Chemical compound O.[Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O BUACSMWVFUNQET-UHFFFAOYSA-H 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002808 molecular sieve Substances 0.000 description 1
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Classifications
-
- 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
-
- 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
- B01D53/06—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 with moving adsorbents, e.g. rotating beds
-
- 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
- B01D53/26—Drying gases or vapours
- B01D53/261—Drying gases or vapours by adsorption
-
- 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
- B01D53/26—Drying gases or vapours
- B01D53/28—Selection of materials for use as drying agents
-
- 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
- B01J20/04—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising compounds of alkali metals, alkaline earth metals or magnesium
- B01J20/041—Oxides or hydroxides
-
- 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
- B01J20/04—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising compounds of alkali metals, alkaline earth metals or magnesium
- B01J20/046—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising compounds of alkali metals, alkaline earth metals or magnesium containing halogens, e.g. halides
-
- 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
- B01J20/06—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising oxides or hydroxides of metals not provided for in group B01J20/04
- B01J20/08—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising oxides or hydroxides of metals not provided for in group B01J20/04 comprising aluminium oxide or hydroxide; comprising bauxite
Abstract
The invention discloses a silica gel rotating wheel adsorbing material for dehumidification and a preparation method thereof, wherein the preparation method comprises the following steps: the silica gel is prepared by using soluble aluminum salt and soluble magnesium salt in a compounding way during silica gel synthesis to enable the silica gel and water glass to have double hydrolysis reaction, so that silica gel, aluminum hydroxide and magnesium hydroxide precipitates are obtained on the surface of a carrier simultaneously, part of the precipitates are washed by using dilute acid to improve the porosity of the surface of the silica gel, and then excessive acid is neutralized by using magnesium hydroxide; and the silica gel runner adsorption material for dehumidification prepared by the method; the silica gel runner adsorption material prepared by the method disclosed by the invention has better strength and adsorption activity, an excellent dehumidification effect is obtained, and the regeneration temperature is reduced.
Description
Technical Field
The invention relates to the technical field of gas dehumidification, in particular to a rotary wheel adsorbing material for dehumidification, and specifically relates to a silica gel rotary wheel adsorbing material for dehumidification and a preparation method thereof.
Background
In the industries of electronics, medicine, food and the like, there are often high requirements on the control of the moisture content of air, and therefore, dehumidification of air is a necessary project in these industries. In addition, in heating and ventilation engineering, dehumidification is usually required, so that dehumidification is closely related to daily life of people. Currently, there are three main types of dehumidification materials: halogen salts, silica gel, and molecular sieves. Among them, the halogen salt adsorption medium is represented by lithium chloride, has high moisture absorption capacity, is easy to regenerate, but is easy to deliquesce to cause corrosion of equipment; silica gel is a cheap and stable adsorption material, but the adsorption capacity of the silica gel is poorer than that of lithium chloride, and the dehumidification core body is easy to collapse and block a pore channel when being in a working environment with the temperature of more than 100 ℃ for a long time, so that the dehumidification effect is seriously reduced.
Disclosure of Invention
The technical problem to be solved by the invention is to overcome the defects in the prior art and provide an improved preparation method of a silica gel rotary wheel adsorbing material for dehumidification.
The invention also provides the silica gel rotating wheel adsorbing material for dehumidification prepared by the preparation method.
In order to solve the technical problems, the invention adopts a technical scheme as follows:
a preparation method of a silica gel rotating wheel adsorption material for dehumidification comprises the following steps:
(1) soaking a carrier made of glass fiber in a water glass solution, and drying;
(2) immersing the carrier treated in the step (1) into a reaction solution for reaction to obtain a carrier carrying silica gel; wherein the reaction solution is an aqueous solution containing both soluble aluminum salt and soluble magnesium salt;
(3) soaking the carrier obtained in the step (2) in an acid solution;
(4) under the condition of stirring, adding magnesium hydroxide into the acid solution soaked in the step (3) until the solution is neutral or the magnesium hydroxide is not dissolved;
continuing stirring, detecting the pH value, and if the pH value shows acidity, adding magnesium hydroxide again until the solution is neutral or the magnesium hydroxide is not dissolved; repeating the steps until the pH value detected after the stirring is continued is neutral;
(5) and (4) taking out the carrier treated in the step (4), washing and drying to obtain the silica gel rotary wheel adsorbing material for dehumidification.
According to some preferred aspects of the present invention, in the step (1), the water glass solution uses water glass having a modulus of 2.2 to 3.1.
According to some preferred aspects of the present invention, in the step (1), the water glass solution contains 20 to 40% by mass of water glass.
According to some preferred aspects of the present invention, in the step (1), the water glass solution used for soaking is at a temperature of 30 to 50 ℃ and a soaking time of 0.5 to 5 hours.
In some embodiments of the present invention, in the step (1), the drying time is 24 to 36 hours.
According to some preferred aspects of the invention, in step (2), the reaction is carried out at a temperature of 35 to 90 ℃. In some embodiments of the invention, in step (2), the reaction time is 1 to 10 hours.
According to some preferred aspects of the invention, in step (2), the soluble aluminium salt is aluminium chloride and/or aluminium sulphate.
According to a preferred aspect of the present invention, in the step (2), the soluble magnesium salt is magnesium chloride.
According to some preferred aspects of the present invention, in the step (2), the feeding mass ratio of the soluble aluminum salt to the soluble magnesium salt in the reaction solution is 1: 0.5-2.
According to some preferred and specific aspects of the present invention, in the step (2), the solute content of the reaction solution is 10 to 21% by mass.
According to some preferred and specific aspects of the present invention, in the step (2), the pH of the reaction solution is 3 to 6.
According to some preferred and specific aspects of the present invention, in the step (3), the acid solution is hydrochloric acid having a concentration of 1 to 5%.
In some embodiments of the present invention, in step (3), the soaking time in the acid solution is 1 to 5 hours.
According to some preferred and specific aspects of the present invention, in step (4), the stirring is continued for 0.5 to 2 hours after the completion of the addition of the magnesium hydroxide.
The invention provides another technical scheme that: the silica gel rotating wheel for dehumidification is prepared by the preparation method of the silica gel rotating wheel adsorbing material for dehumidification.
Due to the adoption of the technical scheme, compared with the prior art, the invention has the following advantages:
according to the invention, aluminum salt and magnesium salt are compounded and used during silica gel synthesis, and the aluminum salt and the magnesium salt are subjected to double hydrolysis reaction with water glass, so that silica gel, aluminum hydroxide and magnesium hydroxide precipitates are obtained on the surface of a carrier simultaneously, a part of precipitates are washed away by further using a dilute acid to improve the porosity of the surface of the silica gel, and then excessive acid is neutralized by using the magnesium hydroxide, so that magnesium chloride serving as a modifier can be generated in situ, and the loss of magnesium chloride entering a silica gel pore channel, which is possibly caused by removing residual acid by repeated washing, is avoided, so that the silica gel rotating wheel material for dehumidification prepared by the method disclosed by the invention can have better strength and adsorption activity, an excellent dehumidification effect is obtained, and the regeneration temperature is reduced to 90-110 ℃ from 100-120 ℃ of a common silica gel material.
Detailed Description
In order to better show the technical route and the implementation effect of the invention, the following is further explained in combination with several embodiments of the invention. The following examples are only a few embodiments of the present invention, not all examples, and other examples obtained by other researchers in the field based on the technical scheme of the present invention should fall within the protection scope of the present invention.
All percentages in the present invention are mass percentages unless otherwise specified.
The embodiment of the invention provides a preparation method of a silica gel rotating wheel adsorbing material for dehumidification, which comprises the following steps:
(1) soaking a carrier made of glass fiber in a water glass solution, and drying;
(2) immersing the carrier treated in the step (1) into a reaction solution for reaction to obtain a carrier carrying silica gel; wherein the reaction solution is an aqueous solution containing both soluble aluminum salt and soluble magnesium salt; in the step, the soluble aluminum salt and the soluble magnesium salt respectively perform double hydrolysis reaction with water glass on the surface of the carrier or in the pore channels of the carrier;
(3) soaking the carrier obtained in the step (2) in an acid solution; can remove part of insoluble aluminum salt and magnesium salt precipitate generated by the reaction, and can further increase the pore volume of the silica gel;
(4) under the condition of stirring, adding magnesium hydroxide into the acid solution soaked in the step (3) until the solution is neutral or the magnesium hydroxide is not dissolved;
continuing stirring, detecting the pH value, and if the pH value shows acidity, adding magnesium hydroxide again until the solution is neutral or the magnesium hydroxide is not dissolved; repeating the steps until the pH value detected after the stirring is continued is neutral;
(5) and (4) taking out the carrier treated in the step (4), washing and drying to obtain the silica gel rotary wheel adsorbing material for dehumidification.
In the embodiment of the invention, when the carrier made of the glass fiber is soaked in the water glass solution, the soaking temperature is controlled to be 30-50 ℃, and the temperature is favorable for reducing the viscosity of the water glass, preventing the carrier from blocking pore passages due to overhigh viscosity, and enabling the carrier to be coated with the water glass more uniformly. Meanwhile, in order to ensure the gluing amount of the water glass, the modulus is preferably 2.2-3.1, the mass concentration is preferably 20-40%, the soaking time is preferably 0.5-5h, so that the water glass can fully enter a carrier pore passage, the drying time is preferably 24-36h, the water glass can be fully dried, and the silica gel generated in the next reaction process is prevented from being separated from the carrier due to the fact that the water glass cannot be dried in place.
In the embodiment of the invention, the selected soluble aluminum salt is aluminum chloride and/or aluminum sulfate, the used soluble magnesium salt is magnesium chloride, and the salts are used as strong acid weak base salts and can be continuously hydrolyzed along with the reaction to release hydrogen ions to keep the acidity of the solution, thereby ensuring the continuity of the reaction. Meanwhile, the soluble aluminum salt can introduce aluminum element into the silica gel during reaction, so that the strength and the adsorption activity of the silica gel are improved, and the magnesium chloride is used, so that halogen salt is introduced into the silica gel during the reaction, on one hand, part of unreacted magnesium chloride can be better remained in pores of the silica gel, on the other hand, part of magnesium salt participating in the reaction can be reduced into magnesium chloride in the subsequent acid washing step, so that the residual rate of the magnesium chloride is increased, and the dehumidification effect of the silica gel is improved. Preferably, the ratio of the aluminum salt to the magnesium salt is 1:0.5-2, the total solute concentration is 10-21%, and the pH value of the obtained reaction solution is 3-6. The preferable reaction temperature and reaction time are 35-90 ℃ and 1-10h, so as to ensure the full reaction.
Furthermore, the acid solution selected in the acid washing step is preferably hydrochloric acid, and the hydrochloric acid can be used for recovering magnesium chloride from the magnesium hydroxide generated after the reaction, so that the magnesium chloride is generated in situ in the silica gel, the residual rate of the magnesium chloride in the silica gel can be improved, and the moisture absorption performance of the material is improved to a certain extent. In addition, magnesium chloride can be generated in situ by selecting magnesium hydroxide to neutralize excessive hydrochloric acid, so that the concentration of the modifier can be improved, and the loss of magnesium chloride in the silica gel, which is possibly caused by multiple times of water washing, can be avoided.
The above-described scheme is further illustrated below with reference to specific examples; it is to be understood that these embodiments are provided to illustrate the general principles, essential features and advantages of the present invention, and the present invention is not limited in scope by the following embodiments; the implementation conditions used in the examples can be further adjusted according to specific requirements, and the implementation conditions not indicated are generally the conditions in routine experiments.
In the following, all starting materials are either commercially available or prepared by conventional methods in the art, unless otherwise specified.
Example 1
The embodiment provides a preparation method of a silica gel rotating wheel adsorbing material for dehumidification, which comprises the following steps:
coating water glass, namely pouring a water glass solution with the modulus of 2.2 and the mass concentration of 30% into a 10L glass beaker, then placing the beaker on a hot table at 35 ℃ for heat preservation, completely immersing a carrier made of prefabricated honeycomb glass fibers into the water glass solution for soaking for 5 hours after the temperature is stabilized, and then taking out and drying for 24 hours by using flowing hot air at 100 ℃.
Preparation of reaction solution to a 10L glass beaker, 7.12kg of clean water was added, followed by addition of 1.81kg of aluminum chloride hexahydrate and 1.07kg of magnesium chloride hexahydrate [ m (AlCl) under stirring3):m(MgCl2) 2:1, the total mass concentration of solute is 15%]Until the reaction solution is completely dissolved to obtain a reaction solution with a pH value of about 4, and then placing the reaction solution on a hot bench at 90 ℃ for heat preservation and sealing to prevent the reaction solution from evaporating too fast.
Preparing modified silica gel: after the temperature of the reaction liquid is stable, immersing the dried carrier coated with the water glass into the reaction liquid for reaction for 10 hours; and after the reaction is finished, taking out the carrier, and soaking the carrier in hydrochloric acid with the mass concentration of 5% for 5 hours.
Neutralization of excess hydrochloric acid: and slowly adding magnesium hydroxide into the reaction solution under the stirring condition until the solution is neutral, then continuously stirring for 1 hour and measuring the pH value to obtain a weakly acidic result, so that a small amount of magnesium hydroxide is slowly added to be neutral again, and the pH value is measured to be unchanged after continuously stirring for 1 hour.
Washing and drying: and taking the treated carrier out of the reaction solution, washing the carrier once by using running water, and fully drying the carrier by using flowing hot air at the temperature of 100 ℃ to obtain the silica gel rotating wheel adsorbing material for dehumidification.
Example 2
The embodiment provides a preparation method of a silica gel rotating wheel adsorbing material for dehumidification, which comprises the following steps:
coating water glass, namely pouring a water glass solution with the modulus of 2.8 and the mass concentration of 25% into a 10L glass beaker, then placing the beaker on a hot table at 40 ℃ for heat preservation, completely immersing a carrier made of prefabricated honeycomb glass fibers into the water glass solution for soaking for 2.5 hours after the temperature is stabilized, and then taking out and drying for 30 hours by using flowing hot air at 100 ℃.
Preparation of reaction solution 6.33kg of clean water was added to a 10L glass beaker, to which was subsequently added 1.75kg of aluminum sulfate octadecahydrate and 1.92kg of magnesium chloride hexahydrate (m [ Al ] Al) with stirring2(SO4)3]:m(MgCl2) 1:1, total solute mass concentration of 18%) until complete dissolutionTo a pH of about 3, and then the reaction was incubated on a 70 ℃ hot plate and sealed to prevent evaporation too quickly.
Preparing modified silica gel: after the temperature of the reaction liquid is stable, immersing the dried carrier coated with the water glass into the reaction liquid for reaction for 8 hours; and after the reaction is finished, taking out the carrier, and soaking the carrier in 3% hydrochloric acid for 5 hours.
Neutralization of excess hydrochloric acid: and slowly adding magnesium hydroxide into the reaction solution under the stirring condition until the solution is neutral, then continuously stirring for 0.5h and measuring the pH value to obtain a weakly acidic result, so that a small amount of magnesium hydroxide is slowly added to be neutral again, and the pH value is measured to be unchanged after continuously stirring for 0.5 h.
Washing and drying: and taking the treated carrier out of the reaction solution, washing the carrier once by using running water, and fully drying the carrier by using flowing hot air at the temperature of 100 ℃ to obtain the silica gel rotating wheel adsorbing material for dehumidification.
Example 3
The embodiment provides a preparation method of a silica gel rotating wheel adsorbing material for dehumidification, which comprises the following steps:
coating water glass, namely pouring a water glass solution with the modulus of 3.1 and the mass concentration of 28% into a 10L glass beaker, then placing the beaker on a hot table at 45 ℃ for heat preservation, completely immersing a carrier made of prefabricated honeycomb glass fibers into the water glass for 2 hours after the temperature is stabilized, and then taking out and drying the carrier by flowing hot air at 100 ℃ for 28 hours.
Preparation of reaction solution 5.91kg of clean water was added to a 10L glass beaker, to which was subsequently added 2.17kg of aluminum chloride hexahydrate and 1.92kg of magnesium chloride hexahydrate [ m (AlCl) under stirring3):m(MgCl2) The total mass concentration of solute is 21 percent]Until the reaction solution is completely dissolved to obtain a reaction solution with a pH value of about 3, and then placing the reaction solution on a hot bench at 80 ℃ for heat preservation and sealing to prevent the reaction solution from evaporating too fast.
Preparing modified silica gel: after the temperature of the reaction liquid is stable, immersing the dried carrier coated with the water glass into the reaction liquid for reaction for 7 hours; and after the reaction is finished, taking out the carrier, and soaking the carrier in hydrochloric acid with the mass concentration of 2% for 3 hours.
Neutralization of excess hydrochloric acid: and slowly adding magnesium hydroxide into the reaction solution under the stirring condition until the solution is neutral, then continuously stirring for 1.5h and measuring the pH value to obtain a weakly acidic result, so that a small amount of magnesium hydroxide is slowly added to be neutral again, and the pH value is measured to be unchanged after continuously stirring for 1.5 h.
Washing and drying: and taking the treated carrier out of the reaction solution, washing the carrier once by using running water, and fully drying the carrier by using flowing hot air at the temperature of 100 ℃ to obtain the silica gel rotating wheel adsorbing material for dehumidification.
Comparative example 1
Coating the water glass, namely pouring a 25 mass percent water glass solution with the modulus of 2.8 into a 10L glass beaker, completely immersing the carrier made of the prefabricated honeycomb glass fiber into the water glass at room temperature (about 15 ℃) for 2.5 hours, and then taking out and drying the carrier for 30 hours by using flowing hot air at 100 ℃.
The reaction solution was prepared by adding 6.50kg of clean water to a 10L glass beaker, then adding 3.50kg of aluminum sulfate octadecahydrate (solute mass concentration: 18%) thereto under stirring until complete dissolution to give a reaction solution having a pH of about 3, and then placing the reaction solution on a 70 ℃ hot plate for heat preservation and sealing to prevent excessive evaporation.
Preparation of silica gel: after the temperature of the reaction liquid is stable, immersing the dried carrier into the reaction liquid for reaction for 8 hours; and after the reaction is finished, taking out the glass fiber carrier, soaking the glass fiber carrier in 3% hydrochloric acid for 5 hours, taking out the glass fiber carrier, repeatedly washing the glass fiber carrier with clear water until the eluate is neutral, and finally fully drying the glass fiber carrier with flowing hot air at 100 ℃ to obtain the silica gel rotating wheel material for dehumidification.
Comparative example 2
Coating the water glass, namely pouring a 25 mass percent water glass solution with the modulus of 2.8 into a 10L glass beaker, completely immersing the carrier made of the prefabricated honeycomb glass fiber into the water glass at room temperature (about 15 ℃) for 2.5 hours, and then taking out and drying the carrier for 30 hours by using flowing hot air at 100 ℃.
The reaction solution was prepared by adding 5kg of clean water to a 10L glass beaker, followed by adding 5kg of 36% by mass concentrated hydrochloric acid thereto under stirring, and then placing the reaction solution on a 35 ℃ hot plate for heat preservation and sealing to prevent evaporation too quickly.
Preparation of silica gel: immersing the dried carrier into the reaction solution for reaction for 8 hours; and after the reaction is finished, taking out the silica gel rotary wheel material, repeatedly washing the silica gel rotary wheel material by using clean water until the eluate is neutral, and finally fully drying the silica gel rotary wheel material by using flowing hot air at the temperature of 100 ℃ to obtain the silica gel rotary wheel material for dehumidification.
Comparative example 3
A commercially available hygroscopic material, silica gel, was coated on a honeycomb-shaped glass fiber-made support, and then dried with flowing hot air as in example 1 until the mass of the material was not reduced any more, and then the treated support material was immersed in a solution of aluminum chloride and magnesium chloride [ m (AlCl)3):m(MgCl2) 2:1, the total mass concentration of solute is 15%]Soaking for 12h, draining the carrier, and drying again by using flowing hot air as in example 1 until the mass of the material is not reduced any more to obtain the silica gel rotary wheel material for dehumidification.
Performance testing
The same mass of the silica gel rotor materials for dehumidification prepared in examples 1 to 3 and comparative examples 1 to 3 were taken, and under the conditions of the same wind speed (1.5m/s), the same temperature (25 ℃) and the same relative humidity (80%), the moisture absorption rates were measured after fixed adsorption for 30min, and the moisture absorption rates (mass after adsorption for 30 min-sample original mass)/sample original mass are shown in table 1.
TABLE 1
The above embodiments are merely illustrative of the technical concept and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the content of the present invention and implement the invention, and not to limit the scope of the invention, and all equivalent changes or modifications made according to the spirit of the present invention should be covered by the scope of the present invention.
Claims (10)
1. A preparation method of a silica gel rotating wheel adsorbing material for dehumidification is characterized by comprising the following steps:
(1) soaking a carrier made of glass fiber in a water glass solution, and drying;
(2) immersing the carrier treated in the step (1) into a reaction solution for reaction to obtain a carrier carrying silica gel; wherein the reaction solution is an aqueous solution containing both soluble aluminum salt and soluble magnesium salt;
(3) soaking the carrier obtained in the step (2) in an acid solution;
(4) under the condition of stirring, adding magnesium hydroxide into the acid solution soaked in the step (3) until the solution is neutral or the magnesium hydroxide is not dissolved;
continuing stirring, detecting the pH value, and if the pH value shows acidity, adding magnesium hydroxide again until the solution is neutral or the magnesium hydroxide is not dissolved; repeating the steps until the pH value detected after the stirring is continued is neutral;
(5) and (4) taking out the carrier treated in the step (4), washing and drying to obtain the silica gel rotary wheel adsorbing material for dehumidification.
2. The method for preparing a silica gel rotary wheel adsorbing material for dehumidification according to claim 1, wherein in the step (1), the modulus of the water glass adopted by the water glass solution is 2.2-3.1.
3. The method for preparing the silica gel rotary wheel adsorbing material for dehumidification according to claim 1, wherein in the step (1), the mass percentage of the water glass adopted in the water glass solution is 20-40%.
4. The preparation method of the silica gel rotary wheel adsorbing material for dehumidification as claimed in claim 1, wherein in the step (1), the temperature of the water glass solution used for soaking is 30-50 ℃, and the soaking time is 0.5-5 h; and/or in the step (1), the drying time is 24-36 h.
5. The method for preparing the silica gel rotary wheel adsorbing material for dehumidification according to claim 1, wherein in the step (2), the reaction is carried out at a temperature of 35-90 ℃ for 1-10 h.
6. The method for preparing a silica gel rotary wheel adsorbing material for dehumidification according to claim 1, wherein in the step (2), the soluble aluminum salt is aluminum chloride and/or aluminum sulfate; and/or, in the step (2), the soluble magnesium salt is magnesium chloride.
7. The method according to claim 1, wherein in the step (2), the feeding mass ratio of the soluble aluminum salt to the soluble magnesium salt in the reaction solution is 1: 0.5-2; and/or in the step (2), the solute mass percentage content of the reaction liquid is 10-21%; and/or in the step (2), the pH value of the reaction liquid is 3-6.
8. The method for preparing the silica gel rotary wheel adsorbing material for dehumidification according to claim 1, wherein in the step (3), the acid solution is hydrochloric acid with a concentration of 1-5%; and/or in the step (3), the soaking time in the acid solution is 1-5 h.
9. The method for preparing a silica gel rotary wheel adsorbing material for dehumidification according to claim 1, wherein in the step (4), after the magnesium hydroxide is added, the stirring is continued for 0.5-2 h.
10. A silica gel rotor for dehumidification produced by the method for producing a silica gel rotor for dehumidification as defined in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010184565.5A CN111408338B (en) | 2020-03-17 | 2020-03-17 | Silica gel rotating wheel adsorbing material for dehumidification and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010184565.5A CN111408338B (en) | 2020-03-17 | 2020-03-17 | Silica gel rotating wheel adsorbing material for dehumidification and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111408338A true CN111408338A (en) | 2020-07-14 |
| CN111408338B CN111408338B (en) | 2023-03-14 |
Family
ID=71485174
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010184565.5A Active CN111408338B (en) | 2020-03-17 | 2020-03-17 | Silica gel rotating wheel adsorbing material for dehumidification and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111408338B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114950342A (en) * | 2022-05-24 | 2022-08-30 | 江苏苏净集团有限公司 | Composite material with efficient desorption performance for dehumidification rotating wheel and preparation method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4911775A (en) * | 1985-04-22 | 1990-03-27 | Kabushiki Kaisha Seibu Giken | Method of manufacturing dehumidifier element |
| JPH0368415A (en) * | 1989-08-07 | 1991-03-25 | Seibu Giken:Kk | Production of element for gas sorbing machine |
| CN1586711A (en) * | 2004-07-29 | 2005-03-02 | 华南理工大学 | Aluminium modified silica-gel adsorbent material and its preparing process |
| CN1986046A (en) * | 2006-11-27 | 2007-06-27 | 华南理工大学 | Preparing process of composite block adsorbent of molecular sieve and modified silica gel |
| CN107051375A (en) * | 2017-03-24 | 2017-08-18 | 佛山市南海依泰科空气处理设备有限公司 | A kind of desiccant wheel and preparation method thereof |
-
2020
- 2020-03-17 CN CN202010184565.5A patent/CN111408338B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4911775A (en) * | 1985-04-22 | 1990-03-27 | Kabushiki Kaisha Seibu Giken | Method of manufacturing dehumidifier element |
| JPH0368415A (en) * | 1989-08-07 | 1991-03-25 | Seibu Giken:Kk | Production of element for gas sorbing machine |
| CN1586711A (en) * | 2004-07-29 | 2005-03-02 | 华南理工大学 | Aluminium modified silica-gel adsorbent material and its preparing process |
| CN1986046A (en) * | 2006-11-27 | 2007-06-27 | 华南理工大学 | Preparing process of composite block adsorbent of molecular sieve and modified silica gel |
| CN107051375A (en) * | 2017-03-24 | 2017-08-18 | 佛山市南海依泰科空气处理设备有限公司 | A kind of desiccant wheel and preparation method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114950342A (en) * | 2022-05-24 | 2022-08-30 | 江苏苏净集团有限公司 | Composite material with efficient desorption performance for dehumidification rotating wheel and preparation method thereof |
| CN114950342B (en) * | 2022-05-24 | 2024-02-06 | 江苏苏净集团有限公司 | Composite material with efficient desorption performance for dehumidifying rotating wheel and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111408338B (en) | 2023-03-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4332916A (en) | Ion exchange polymers on improved porous substrates | |
| CN110016814B (en) | Antibacterial asymmetric total heat exchange membrane, total heat exchange core and total heat exchanger | |
| CN113731371B (en) | Preparation method of lithium ion adsorption material | |
| CN111408338B (en) | Silica gel rotating wheel adsorbing material for dehumidification and preparation method thereof | |
| CN112675819A (en) | Metal organic framework composite material, preparation method and application | |
| US4415677A (en) | Removal of sulfate ions from brine using composite of polymeric zirconium hydrous oxide in macroporous matrix | |
| CN112827470A (en) | Selective air water-absorbing MOFs material with high stability and preparation method thereof | |
| CN108144575B (en) | Graphite sulfide, silica gel and lithium chloride curing composite dehumidifying agent and preparation method thereof | |
| US4415678A (en) | Removal of sulfate ions from brine using amorphous polymeric zirconium oxide formed within a macroporous polymer matrix | |
| US5254195A (en) | Process for manufacturing moisture exchange element | |
| CN107837808A (en) | The method that the copper-loaded method of macromolecule resin prepares copper-loaded solid carbon | |
| JP3894529B2 (en) | Dehumidifying agent, dehumidifying element and manufacturing method thereof | |
| CN108079936B (en) | Phosphate type lithium ion sieve filler and preparation method thereof | |
| CN111408337A (en) | Silica gel dehumidification rotating wheel and preparation method thereof | |
| CN112705158A (en) | Preparation method of high-load modified silica gel dehumidification rotary core | |
| CN108905641B (en) | Nanofiltration membrane and preparation method thereof | |
| CN113368697A (en) | Monovalent cation selective separation membrane modified by metal organic framework material and preparation method and application thereof | |
| CN112337435A (en) | A-type zeolite/ZIF-8 core-shell structure microsphere and preparation method and application thereof | |
| CN114950342B (en) | Composite material with efficient desorption performance for dehumidifying rotating wheel and preparation method thereof | |
| US6375914B1 (en) | Method for treating silica gel | |
| CN117463292A (en) | Activated carbon fiber-based MOFs block moisture absorbent and mixed solvent thermal in-situ synthesis method and application thereof | |
| SU686989A1 (en) | Method of obtaining granulated inorganic sorbents | |
| CN109056421B (en) | Moisture-retaining lining paper and preparation method thereof | |
| JPH07108367B2 (en) | Dehumidification method | |
| CN103537175B (en) | A kind of wheel center of dehumidification rotating wheel and manufacture method thereof |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20231206 Address after: No.2, Weixin Road, industrial park, Suzhou, Jiangsu Province, 215000 Patentee after: JIANGSU SUJING GROUP Co.,Ltd. Patentee after: Sujing Yingtaike Environmental Equipment (Yancheng) Co.,Ltd. Address before: No.2, Weixin Road, Suzhou Industrial Park, Suzhou, Jiangsu Province, 215000 Patentee before: JIANGSU SUJING GROUP Co.,Ltd. |
|
| TR01 | Transfer of patent right |