CN110127736B - Preparation method of high-viscosity macroporous pseudo-boehmite - Google Patents
Preparation method of high-viscosity macroporous pseudo-boehmite Download PDFInfo
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- CN110127736B CN110127736B CN201910454521.7A CN201910454521A CN110127736B CN 110127736 B CN110127736 B CN 110127736B CN 201910454521 A CN201910454521 A CN 201910454521A CN 110127736 B CN110127736 B CN 110127736B
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- VXAUWWUXCIMFIM-UHFFFAOYSA-M aluminum;oxygen(2-);hydroxide Chemical compound [OH-].[O-2].[Al+3] VXAUWWUXCIMFIM-UHFFFAOYSA-M 0.000 title claims abstract description 45
- 238000002360 preparation method Methods 0.000 title claims abstract description 12
- 239000000463 material Substances 0.000 claims abstract description 52
- 239000012065 filter cake Substances 0.000 claims abstract description 43
- 239000000243 solution Substances 0.000 claims abstract description 39
- 230000032683 aging Effects 0.000 claims abstract description 30
- 238000006243 chemical reaction Methods 0.000 claims abstract description 22
- 238000001914 filtration Methods 0.000 claims abstract description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 16
- 239000000706 filtrate Substances 0.000 claims abstract description 14
- 239000002002 slurry Substances 0.000 claims abstract description 14
- 238000005406 washing Methods 0.000 claims abstract description 13
- 239000012752 auxiliary agent Substances 0.000 claims abstract description 12
- 238000006386 neutralization reaction Methods 0.000 claims abstract description 12
- 238000001035 drying Methods 0.000 claims abstract description 11
- 238000002425 crystallisation Methods 0.000 claims abstract description 10
- 230000008025 crystallization Effects 0.000 claims abstract description 10
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical class [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 claims abstract description 8
- 238000002156 mixing Methods 0.000 claims abstract description 8
- 239000012266 salt solution Substances 0.000 claims abstract description 8
- 238000004537 pulping Methods 0.000 claims abstract description 7
- 238000000034 method Methods 0.000 claims description 20
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 16
- 239000011734 sodium Substances 0.000 claims description 16
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 15
- 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 15
- 229910052708 sodium Inorganic materials 0.000 claims description 15
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 claims description 6
- 239000012153 distilled water Substances 0.000 claims description 6
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims description 3
- 239000004202 carbamide Substances 0.000 claims description 3
- 230000035484 reaction time Effects 0.000 claims description 3
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 claims 2
- 239000011148 porous material Substances 0.000 description 7
- 230000008569 process Effects 0.000 description 6
- 239000003054 catalyst Substances 0.000 description 5
- 238000012986 modification Methods 0.000 description 5
- 230000004048 modification Effects 0.000 description 5
- 230000008901 benefit Effects 0.000 description 4
- 239000002244 precipitate Substances 0.000 description 4
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 3
- 238000001935 peptisation Methods 0.000 description 3
- 229910001415 sodium ion Inorganic materials 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- -1 (NH)4)2CO3 Chemical compound 0.000 description 1
- 241000790917 Dioxys <bee> Species 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000003463 adsorbent Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 150000007529 inorganic bases Chemical class 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 150000004682 monohydrates Chemical class 0.000 description 1
- 150000007530 organic bases Chemical class 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 238000005504 petroleum refining Methods 0.000 description 1
- 238000006068 polycondensation reaction Methods 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000012066 reaction slurry Substances 0.000 description 1
- 230000036632 reaction speed Effects 0.000 description 1
- 238000002407 reforming Methods 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
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Classifications
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F7/00—Compounds of aluminium
- C01F7/02—Aluminium oxide; Aluminium hydroxide; Aluminates
- C01F7/04—Preparation of alkali metal aluminates; Aluminium oxide or hydroxide therefrom
- C01F7/14—Aluminium oxide or hydroxide from alkali metal aluminates
- C01F7/141—Aluminium oxide or hydroxide from alkali metal aluminates from aqueous aluminate solutions by neutralisation with an acidic agent
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/12—Surface area
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/14—Pore volume
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Inorganic Chemistry (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
- Catalysts (AREA)
Abstract
The invention relates to a preparation method of high-viscosity macroporous pseudo-boehmite, which comprises the following steps: mixing an aluminum salt solution and a meta-aluminate solution, and carrying out neutralization reaction at the temperature of 15-45 ℃ to obtain a neutralized material, wherein the pH value of the neutralized material is 6.5-8.5; performing crystallization reaction on the neutralized material at the temperature of 50-80 ℃ to obtain crystallized material, filtering the crystallized material to obtain crystallized filter cake and crystallized filtrate, and washing the crystallized filter cake to obtain wet filter cake; adding water into the wet filter cake and pulping to obtain slurry, adding an auxiliary agent into the slurry, carrying out an aging reaction for 30-180min at the temperature of 80-95 ℃ to obtain an aged material, filtering the aged material to obtain an aged filter cake and an aged filtrate, and drying the aged filter cake to obtain the high-viscosity macroporous pseudo-boehmite.
Description
Technical Field
The invention belongs to the technical field of compound synthesis, and particularly relates to a preparation method of high-viscosity macroporous pseudo-boehmite.
Background
Pseudo-boehmite, also called alumina monohydrate and pseudoboehmite, has the characteristics of high crystalline phase purity, good peptization performance, strong caking property, high specific surface area, large pore volume and the like, can be used as an adsorbent, a binder or a carrier for preparing petroleum refining catalysts, reforming catalysts and production exhaust/automobile exhaust purification catalysts, but the existing pseudo-boehmite has insufficient viscosity and large pore volume, so that the field needs to develop the pseudo-boehmite with high viscosity and large pores.
Disclosure of Invention
In view of the above problems, the present invention has been made to provide a method for preparing highly viscous large pore pseudo-boehmite, which overcomes or at least partially solves the above problems.
The embodiment of the invention provides a preparation method of high-viscosity macroporous pseudo-boehmite, which comprises the following steps:
mixing an aluminum salt solution and a meta-aluminate solution, and carrying out neutralization reaction at the temperature of 15-45 ℃ to obtain a neutralized material, wherein the pH value of the neutralized material is 6.5-8.5;
performing crystallization reaction on the neutralized material at the temperature of 50-80 ℃ to obtain crystallized material, filtering the crystallized material to obtain crystallized filter cake and crystallized filtrate, and washing the crystallized filter cake to obtain wet filter cake;
adding water into the wet filter cake and pulping to obtain slurry, adding an auxiliary agent into the slurry, carrying out an aging reaction for 30-180min at the temperature of 80-95 ℃ to obtain an aged material, filtering the aged material to obtain an aged filter cake and an aged filtrate, and drying the aged filter cake to obtain the high-viscosity macroporous pseudo-boehmite.
Further, the aluminum salt solution is an aluminum sulfate solution, and the aluminum sulfate solution contains 6-10% of alumina and 20-28% of sulfate radical by mass percent.
Further, in the aluminum sulfate solution, the content of alumina is 8% and the content of sulfate radical is 24% by mass.
Further, the metaaluminate solution is a sodium metaaluminate solution, and the concentration of alumina in the sodium metaaluminate solution is 20-100g/L in percentage by mass.
Further, the concentration of alumina in the sodium metaaluminate solution is 50 g/L.
Further, the neutralization reaction temperature is 30 ℃, and the pH value of the neutralized material is 7.0.
Further, the crystallization reaction temperature is 70 ℃.
Further, the washing is performed using distilled water at a temperature of 80 to 95 ℃.
Further, the auxiliary agent is an inorganic and/or organic alkali auxiliary agent without sodium ions and chloride ions, and comprises (NH)4)2CO3、NH4HCO3At least one of urea and isopropanol.
Further, the aging reaction temperature is 90 ℃, the aging reaction time is 60min, and the drying temperature is 80-100 ℃.
One or more technical solutions in the embodiments of the present invention have at least the following technical effects or advantages:
the preparation method of the high-viscosity macroporous pseudo-boehmite comprises the steps of mixing an aluminum salt solution and a meta-aluminate solution for neutralization reaction, and generating a macroporous pseudo-boehmite precipitate by controlling reaction temperature, reaction speed and pH value of reaction slurry, wherein the process is a typical double decomposition neutralization reaction to produce white precipitate and water, and the white precipitate is macroporous pseudo-boehmite; then filtering and washing the precipitate until the impurity index is qualified, wherein the process mainly comprises the steps of washing off sodium ions which are unfavorable for the hydrothermal aging process of the next stage, carrying out slurrying treatment on a filter cake, adding an auxiliary agent in the process, and carrying out polycondensation reaction, wherein the reaction mainly comprises the action of the added auxiliary agent on macroporous pseudo-boehmite, two dissociated water molecules generate a binuclear double-bridge complex, then the complex loses two H < + > to form a stable double-bridge complex with an oxy-oxygen bond, water molecules in the dioxy double-bridge complex are separated to form a 0H group, H20 molecules form a double-bridge complex, and further a tetraethoxy bridge polynuclear complex is formed, as shown below:
the 0-0 groups are alternatively arranged to form a net-shaped or locked polynuclear complex as shown in the following:
the polynuclear complex is slowly stabilized by high-temperature aging and has strong cohesiveness, and finally, the high-viscosity macroporous pseudoboehmite is prepared by filtering, washing, drying and crushing.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
FIG. 1 shows a flow chart for preparing high-viscosity macroporous pseudoboehmite according to an embodiment of the invention;
Detailed Description
The present invention will be described in detail below with reference to specific embodiments and examples, and the advantages and various effects of the present invention will be more clearly apparent therefrom. It will be understood by those skilled in the art that these specific embodiments and examples are for the purpose of illustrating the invention and are not to be construed as limiting the invention.
Throughout the specification, unless otherwise specifically noted, terms used herein should be understood as having meanings as commonly used in the art. Accordingly, unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. If there is a conflict, the present specification will control.
Unless otherwise specifically stated, various raw materials, reagents, instruments, equipment and the like used in the present invention are commercially available or can be prepared by existing methods.
The application provides a preparation method of high-viscosity macroporous pseudo-boehmite, which comprises the following steps:
mixing an aluminum salt solution and a meta-aluminate solution, and carrying out neutralization reaction at the temperature of 15-45 ℃ to obtain a neutralized material, wherein the pH value of the neutralized material is 6.5-8.5;
performing crystallization reaction on the neutralized material at the temperature of 50-80 ℃ to obtain crystallized material, filtering the crystallized material to obtain crystallized filter cake and crystallized filtrate, and washing the crystallized filter cake to obtain wet filter cake;
adding water into the wet filter cake and pulping to obtain slurry, adding an auxiliary agent into the slurry, carrying out an aging reaction for 30-180min at the temperature of 80-95 ℃ to obtain an aged material, filtering the aged material to obtain an aged filter cake and an aged filtrate, and drying the aged filter cake to obtain the high-viscosity macroporous pseudo-boehmite.
In the application, the aluminum salt solution is an aluminum sulfate solution, and the aluminum sulfate solution contains, by mass, 6-10% of alumina and 20-28% of sulfate radicals.
Preferably, the aluminum sulfate solution contains 8% of alumina and 24% of sulfate radical by mass percent.
In the application, the metaaluminate solution is a sodium metaaluminate solution, and the concentration of alumina in the sodium metaaluminate solution is 20-100g/L in percentage by mass.
Preferably, the concentration of the alumina in the sodium metaaluminate solution is 50 g/L.
In the present application, the neutralization reaction temperature is 30 ℃, and the PH of the neutralized material is 7.0.
Preferably, the crystallization reaction temperature is 70 ℃.
In the present application, the washing is carried out with distilled water at a temperature of 80-95 ℃.
In the present application, the auxiliaries are inorganic and/or organic bases which are free of sodium ions and chloride ions, including (NH)4)2CO3、NH4HCO3At least one of urea and isopropanol.
Preferably, the aging reaction temperature is 90 ℃, the aging reaction time is 60min, and the drying temperature is 80-100 ℃.
The method for preparing the high-viscosity macroporous pseudoboehmite according to the present application will be described in detail with reference to 3 specific examples.
Example 1
A preparation method of high-viscosity macroporous pseudo-boehmite comprises the following steps:
mixing an aluminum sulfate solution and a sodium metaaluminate solution, and carrying out neutralization reaction at the temperature of 15 ℃ to obtain a neutralized material, wherein the pH value of the neutralized material is 6.5; according to the mass percentage, in the aluminum sulfate solution, the content of aluminum oxide is 6 percent, and the content of sulfate radical is 20 percent; in the sodium metaaluminate solution, the concentration of alumina is 20 g/L;
carrying out crystallization reaction on the neutralized material at the temperature of 50 ℃ to obtain a crystallized material, filtering the crystallized material to obtain a crystallized filter cake and crystallized filtrate, and washing the crystallized filter cake by using distilled water at the temperature of 80 ℃ to obtain a wet filter cake;
adding water into the wet filter cake for pulping to obtain slurry, adding an auxiliary agent into the slurry, carrying out an aging reaction for 30min at the temperature of 80 ℃ to obtain an aging material, filtering the aging material to obtain an aging filter cake and an aging filtrate, and drying the aging filter cake at the temperature of 80 ℃ to obtain the high-viscosity macroporous pseudoboehmite.
Example 2
A preparation method of high-viscosity macroporous pseudo-boehmite comprises the following steps:
mixing an aluminum sulfate solution and a sodium metaaluminate solution, and carrying out neutralization reaction at the temperature of 45 ℃ to obtain a neutralized material, wherein the pH value of the neutralized material is 8.5; according to the mass percentage, in the aluminum sulfate solution, the content of aluminum oxide is 10 percent, and the content of sulfate radical is 28 percent; in the sodium metaaluminate solution, the concentration of alumina is 100 g/L;
carrying out crystallization reaction on the neutralized material at the temperature of 80 ℃ to obtain crystallized material, filtering the crystallized material to obtain crystallized filter cake and crystallized filtrate, and washing the crystallized filter cake with distilled water at the temperature of 95 ℃ to obtain wet filter cake;
adding water into the wet filter cake for pulping to obtain slurry, adding an auxiliary agent into the slurry, carrying out an aging reaction for 180min at the temperature of 95 ℃ to obtain an aging material, filtering the aging material to obtain an aging filter cake and an aging filtrate, and drying the aging filter cake at the temperature of 90 ℃ to obtain the high-viscosity macroporous pseudoboehmite.
Example 3
A preparation method of high-viscosity macroporous pseudo-boehmite comprises the following steps:
mixing an aluminum sulfate solution and a sodium metaaluminate solution, and carrying out neutralization reaction at the temperature of 30 ℃ to obtain a neutralized material, wherein the pH value of the neutralized material is 7; according to the mass percentage, in the aluminum sulfate solution, the content of aluminum oxide is 8 percent, and the content of sulfate radical is 24 percent; in the sodium metaaluminate solution, the concentration of alumina is 50 g/L;
carrying out crystallization reaction on the neutralized material at the temperature of 70 ℃ to obtain a crystallized material, filtering the crystallized material to obtain a crystallized filter cake and crystallized filtrate, and washing the crystallized filter cake by using distilled water at the temperature of 90 ℃ to obtain a wet filter cake;
adding water into the wet filter cake for pulping to obtain slurry, adding an auxiliary agent into the slurry, carrying out an aging reaction for 60min at the temperature of 90 ℃ to obtain an aging material, filtering the aging material to obtain an aging filter cake and an aging filtrate, and drying the aging filter cake at the temperature of 100 ℃ to obtain the high-viscosity macroporous pseudoboehmite.
The highly viscous macroporous pseudoboehmite prepared in examples 1 to 3 was subjected to performance test, and the test results are shown in table 1.
TABLE 1
| Peptization index/% | Pore volume/mL.g-1 | Specific surface/m 2.g-1 | |
| Example 1 | 97.8 | 0.7335 | 362.5 |
| Example 2 | 98.2 | 0.8101 | 342.1 |
| Example 3 | 98.7 | 0.8335 | 331.1 |
Compared with the prior art, the preparation method of the high-viscosity macroporous pseudo-boehmite has the following characteristics:
the invention adopts a precipitation method to produce the high-viscosity macroporous pseudo-boehmite, and the high-viscosity macroporous pseudo-boehmite is produced by controlling different process conditions, and the peptization index, the pore volume, the pore diameter, the strength, the specific surface area and SiO of the product of the invention2、Fe2O3And Na2The catalyst has various properties such as O content, overcomes the defect that the common macroporous pseudo-boehmite does not have caking property, enhances the strength of the catalyst taking the common macroporous pseudo-boehmite as the raw material, enlarges the application range of the macroporous pseudo-boehmite and can meet the wider application field.
Finally, it should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (9)
1. A preparation method of high-viscosity macroporous pseudo-boehmite is characterized by comprising the following steps:
mixing an aluminum salt solution and a meta-aluminate solution, and carrying out neutralization reaction at the temperature of 15-45 ℃ to obtain a neutralized material, wherein the pH value of the neutralized material is 6.5-8.5;
performing crystallization reaction on the neutralized material at the temperature of 50-80 ℃ to obtain crystallized material, filtering the crystallized material to obtain crystallized filter cake and crystallized filtrate, and washing the crystallized filter cake to obtain wet filter cake;
adding water into the wet filter cake for pulping to obtain slurry, adding an auxiliary agent into the slurry, carrying out an aging reaction for 30-180min at the temperature of 80-95 ℃ to obtain an aged material, filtering the aged material to obtain an aged filter cake and an aged filtrate, drying the aged filter cake to obtain the high-viscosity macroporous pseudo-boehmite, wherein the auxiliary agent comprises (NH)4)2CO3、NH4HCO3At least one of urea and isopropanol, wherein the drying temperature is 80-100 ℃, the high-viscosity macroporous pseudo-boehmite is a reticular or locked polynuclear complex, and the structural formula is as follows:
2. the method for preparing highly viscous macroporous pseudoboehmite according to claim 1, characterized in that the aluminum salt solution is an aluminum sulfate solution, and the aluminum sulfate solution has an alumina content of 6-10% and a sulfate content of 20-28% by mass.
3. The method for preparing highly viscous macroporous pseudoboehmite according to claim 2, characterized in that the aluminum sulfate solution contains 8% of alumina and 24% of sulfate by mass.
4. The method for preparing high-viscosity macroporous pseudoboehmite according to claim 1, characterized in that the metaaluminate solution is a sodium metaaluminate solution, and the alumina concentration in the sodium metaaluminate solution is 20-100g/L in percentage by mass.
5. The method for preparing high-viscosity macroporous pseudoboehmite according to claim 4, characterized in that the alumina concentration in the sodium metaaluminate solution is 50 g/L.
6. The method for preparing high-viscosity macroporous pseudoboehmite according to claim 1, characterized in that the neutralization reaction temperature is 30 ℃ and the pH value of the neutralized material is 7.0.
7. The method for preparing high-viscosity macroporous pseudoboehmite according to claim 1, characterized in that the crystallization reaction temperature is 70 ℃.
8. The method for preparing highly viscous macroporous pseudoboehmite according to claim 1, characterized in that the washing is carried out with distilled water at a temperature of 80-95 ℃.
9. The method for preparing high-viscosity macroporous pseudoboehmite according to claim 1, characterized in that the aging reaction temperature is 90 ℃ and the aging reaction time is 60 min.
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| CN110639484B (en) * | 2019-09-25 | 2020-12-29 | 山东金滢新材料有限公司 | Preparation method of pseudo-boehmite |
| CN113562753A (en) * | 2021-05-12 | 2021-10-29 | 中铝山东新材料有限公司 | Macroporous pseudo-boehmite and preparation method thereof |
| CN113277536B (en) * | 2021-05-24 | 2022-09-13 | 中铝山东有限公司 | Washing process for reducing water consumption for pseudo-boehmite washing |
| CN114853039A (en) * | 2022-05-24 | 2022-08-05 | 北京化工大学 | Pseudo-boehmite with high specific surface area and high pore volume and preparation method thereof |
| CN115124056B (en) * | 2022-06-29 | 2024-01-23 | 中国铝业股份有限公司 | Pseudo-boehmite and preparation method and application thereof |
| CN115818688B (en) * | 2022-10-24 | 2024-04-16 | 中铝郑州有色金属研究院有限公司 | Nanometer boehmite and preparation method thereof |
| CN115974115A (en) * | 2022-12-14 | 2023-04-18 | 南昌宝弘新材料技术有限公司 | Pseudo-boehmite and preparation method thereof |
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