CN107200339A - A kind of method for preparing boehmite - Google Patents
A kind of method for preparing boehmite Download PDFInfo
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- CN107200339A CN107200339A CN201710397488.XA CN201710397488A CN107200339A CN 107200339 A CN107200339 A CN 107200339A CN 201710397488 A CN201710397488 A CN 201710397488A CN 107200339 A CN107200339 A CN 107200339A
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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
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- 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
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Abstract
The present invention discloses a kind of method for preparing boehmite, comprises the following steps：In the plastic reaction of silicon source solution and reacting gas, gas distributor is applied, reacting gas is by gas distributor and silicon source solution haptoreaction.Invention additionally discloses a kind of purposes of gas distributor in boehmite prepares plastic reaction.The present invention uses silicon source and mixed gas for raw material, and boehmite is continuously produced using gas distributor, and technique is simple, reduces cost, improves the stability of product quality.
Description
Technical field
The invention belongs to boehmite preparing technical field, specially a kind of method for preparing boehmite.
Background technology
The chemical formula of boehmite is AlOOHnH2O(0<n<1) it is, that water content is more than boehmite and size of microcrystal
Less than the aluminum oxide of boehmite.There is good adhesive property, heat treatment, which can be generated, to be contained after boehmite peptization
γ-the A1 of abundant pore structure2O3。
Boehmite is to prepare γ-A12O3And its important presoma of series of oxidation aluminium product, especially γ-A12O3
The fields such as catalyst carrier, car tail gas purificant, molecular sieve and adsorbent have obtained widely applying.But different routes
The boehmite property and purposes that to impart aluminum oxide different produced with method.Therefore, exploitation has different pore size and ratio
The boehmite and its derivative of surface area be particularly important and necessity.
At present, the production method of boehmite mainly includes aluminium alcoholates Hydrolyze method, alkaline process（Carbonizatin method）And acid system.Generally come
Say, the product purity of aluminium alcoholates Hydrolyze method is high, and stray crystal is seldom；Alkaline process is carbonizatin method, although cost is low, but stray crystal content is relatively high,
Be not suitable for requiring strict place, acid system is for silicon source, with hydrogen-oxygen with aluminium chloride, aluminium polychloride, aluminum nitrate and aluminum sulfate etc.
Change sodium, sodium carbonate, ammonium hydrogen carbonate, urea, the water soluble alkali such as ammoniacal liquor or ammonia reaction, prepare boehmite, including it is plastic, old
Change, washing, drying and other steps.Usually, acid system prepares cost height of the cost compared to carbonizatin method of boehmite.
Chinese patent literature CN105417560A discloses a kind of method that carbonizatin method prepares boehmite：Using inorganic
Membrane reactor, sodium aluminate solution is continuously added in reactor, while be passed through mixed gas, make sodium aluminate solution with
Carbon dioxide is sufficiently mixed；The average discharge for controlling mixed gas is 10 ~ 100 liters/min, and the pressure of gaseous mixture is big
Carbon dioxide accounts for 20 ~ 60 vt% in 0.1 MPa, gaseous mixture, and the flow of sodium aluminate solution is 150 ~ 200 ml/mins
Clock, the slurry temperature for generating reaction is 20~100 DEG C, and pH value is 9.0~10.5；Slurry carries out heat ageing, filtering, water
Wash and drying process, obtain boehmite.
Chinese patent literature CN10746788A discloses a kind of method that acid system prepares boehmite：It is poly- with Nano type
Close aluminium chloride and sodium hydroxide or ammoniacal liquor reaction directly obtains or passed through again on this basis product obtained by membrane distillation concentration.Control
Total aluminium concentration processed is the mol/L of 0.2 mol/L ~ 2.5, and basicity is nano shape Al in 1 ~ 2.7, aluminium polychloridebContent is
50~90%.Under 25 ~ 80 DEG C of water-bath strong agitations of constant temperature, the mol/L ammonia of 0.01 mol/L ~ 10 is added dropwise with l ml/min with measuring pump
Water or naoh concentration, produce white precipitate, stand the h of aging 5, are centrifuged, filtered with refrigerated centrifuge, and use deionized water
Filter cake is washed, then filter cake is put into 100 DEG C of drying boxes and dries 14 h until being changed into solid particle, boehmite is produced
Product.
There is following defect in the method for existing conventional silicon carbide method production boehmite：Due to carbon dioxide skewness
It is even, cause that its local over-concentration, accessory substance are more, utilization rate of carbon dioxide is low.
The content of the invention
The present invention provides a kind of method for preparing boehmite regarding to the issue above, using silicon source solution and mixed gas
For raw material, boehmite is continuously produced using gas distributor, technique is simple, reduces cost, improves the stabilization of product quality
Property.
To reach above-mentioned purpose, technical scheme is as follows：
The method for preparing boehmite of the present invention, in the plastic reaction of silicon source solution and reacting gas, applies gas
Distributor, reacting gas is by gas distributor and silicon source solution haptoreaction.
Further, described silicon source solution is acid aluminium salt solution, and reacting gas is ammonia gas mixture body；Or it is described
Silicon source solution is basic aluminium salt solution, and reacting gas is carbon dioxide gas mixture；In described ammonia gas mixture body, except ammonia
Gas, also containing air and/or nitrogen；In described carbon dioxide gas mixture, except carbon dioxide, also containing air and/or
Nitrogen.
Further, ammonia accounts for 40 ~ 80 vt% in described ammonia gas mixture body, and the average discharge of mixed gas is 7 ~ 13
L/min, pressure is more than 0.1 MPa；Carbon dioxide accounts for 30 ~ 90 vt% in described carbon dioxide gas mixture, mixed gas
Average discharge is 1 ~ 3 L/min, and pressure is more than 0.1 MPa.
Further, described acid aluminium salt solution is aluminum sulfate solution, and the concentration of described aluminum sulfate solution is with aluminum oxide
10 ~ 60 g/L are calculated as, average discharge is 50 ~ 200 mL/min；Described basic aluminium salt solution is sodium aluminate solution, described
The concentration of sodium aluminate solution is calculated as 20 ~ 60 g/L with aluminum oxide, and average discharge is 50 ~ 200 mL/min.
Further, described gas distributor is multistorey strainer mesh distributor or porous calandria distributor.
Further, described gas distributor is five layers of metal sintering filter screen, and described five layers of metal sintering filter screen are from upper
Arrive down includes protective layer, key-course, shunting layer and two layers of supporting layer successively；Five layers of described metal sintering filter screen material are sintering
Metal.
Further, described plastic reaction temperature is 30 ~ 90 DEG C, and the pH value control of reaction mixture is 9 ~ 10.5.
Further, the described method for preparing boehmite, in addition to aging reaction step, after plastic reaction terminates
The reactant mixture of acquisition carries out aging reaction, and described aging temperature is 50 ~ 80 DEG C, and the time is 30 ~ 200 min.
Further, the described method for preparing boehmite, in addition to separating, washing step, to obtained by aging reaction
Ageing products are separated by filtration, and are repeatedly washed with distilled water, and wash temperature is 50 ~ 100 DEG C, until washes
PH value is 6.8 ~ 7.
Further, the described method for preparing boehmite, in addition to drying steps, by obtained by separating, washing step
Washed product is dried, and described drying temperature is 110 ~ 130 DEG C, and the time is 1 ~ 15 h.
Further, the described method for preparing boehmite, the pore volume of the boehmite prepared is 0.3 ~ 0.6
ML/g, specific surface area is 280 ~ 450 m2/g。
The present invention also provides a kind of purposes of gas distributor in boehmite prepares plastic reaction.
Further, described gas distributor is multistorey strainer mesh distributor or porous calandria distributor.
Further, described gas distributor is five layers of metal sintering filter screen, and described five layers of metal sintering filter screen are from upper
Arrive down includes protective layer, key-course, shunting layer and two layers of supporting layer successively.
Further, in the plastic reaction of silicon source solution and reacting gas, reacting gas passes through gas distributor and silicon source
Solution haptoreaction.
Beneficial effects of the present invention are：
The present invention cleverly conveys reaction from the plastic course of reaction of silicon source solution and reacting gas using gas distributor
Gas, while lift gas conveying uniform is spent, it is found that the boehmite that this method is prepared has such as embodiment
Described in 12, much excellent performance is wanted more than prior art processes, unexpected technique effect is obtained.
The aluminum sulfate solution of low cost of the invention preferred and contain the gaseous mixture of ammonia as silicon source and nertralizer, Huo Zhexuan
With sodium aluminate solution and the gaseous mixture for containing carbon dioxide as silicon source and nertralizer, gaseous mixture is allowed by gas distributor,
Promote the minute bubbles that mixed gas is uniformly divided into 2-150 microns to enter silicon source solution, considerably increase its connecing with silicon source solution
Contacting surface is accumulated, and improves the utilization rate of one way ammonia, reduces the production of accessory substance, the pore volume of the boehmite of preparation for 0.3 ~
0.6 mL/g, specific surface area is 280 ~ 450m2/ g, reduces cost, improves the stability of product quality, increases market competition
Power.
Specific embodiment party
Below by specific embodiment, the present invention is described in detail, but the invention is not limited in following examples.
Embodiment 1
The flow for controlling gaseous mixture is 10.0 L/min（Flow can be adjusted according to the pH value of mixed liquor in course of reaction）, by gas
Body distributor, with concentration（In terms of aluminum oxide）Plastic reaction is carried out for 10 g/L aluminum sulfate solution, aluminum sulfate solution passes through compacted
Dynamic pump is passed through with 200 mL/min speed, and ammonia accounts for 40 vt% in gaseous mixture, and the pH value of reaction mixture is 9, and gelling temperature is
30 ℃；After plastic reaction, reactant mixture enters aged cell, controls 50 DEG C of temperature, the min of aging 30, then with 50 DEG C
Distilled water is repeatedly washed, using the pH value of washes as 6.8, and washed product produces product in 110 DEG C of dry 15 h.Measure production
It is 0.571 mL/g that sample wells, which is held, and specific surface area is 430.52 m2/g。
Embodiment 2
The flow for controlling gaseous mixture is 13.0 L/min（Flow can be adjusted according to the pH value of mixed liquor in course of reaction）, by gas
Body distributor, with concentration（In terms of aluminum oxide）Plastic reaction is carried out for 15 g/L aluminum sulfate solution, aluminum sulfate solution passes through compacted
Dynamic pump is passed through with 200 mL/min speed, and ammonia accounts for 45 vt% in gaseous mixture, and the pH value of reaction mixture is 9.5, gelling temperature
For 35 DEG C；After plastic reaction, reactant mixture enters aged cell, controls 55 DEG C of temperature, the min of aging 40, then with 55
DEG C distilled water is repeatedly washed, and using the pH value of washes as 6.9, washed product produces product in 115 DEG C of dry 12 h.Measure
Product pore volume is 0.596 mL/g, and specific surface area is 479.12 m2/g。
Embodiment 3
The flow for controlling gaseous mixture is 13.2 L/min（Flow can be adjusted according to the pH value of mixed liquor in course of reaction）, by gas
Body distributor, with concentration（In terms of aluminum oxide）Plastic reaction is carried out for 20 g/L aluminum sulfate solution, aluminum sulfate solution passes through compacted
Dynamic pump is passed through with 170 mL/min speed, and ammonia accounts for 50 vt% in gaseous mixture, and the pH value of reaction mixture is 10, and gelling temperature is
40 ℃；After plastic reaction, reactant mixture enters aged cell, controls 60 DEG C of temperature, the min of aging 50, then with 60 DEG C
Distilled water is repeatedly washed, using the pH value of washes as 7, and washed product produces product in 120 DEG C of dry 10 h.Measure product
Pore volume is 0.502 mL/g, and specific surface area is 420.23 m2/g。
Embodiment 4
The flow for controlling gaseous mixture is 13.4 L/min（Flow can be adjusted according to the pH value of mixed liquor in course of reaction）, by gas
Body distributor, with concentration（In terms of aluminum oxide）Plastic reaction is carried out for 25 g/L aluminum sulfate solution, aluminum sulfate solution passes through compacted
Dynamic pump is passed through with 150 mL/min speed, and ammonia accounts for 55 vt% in gaseous mixture, and the pH value of reaction mixture is 10.2, gelling temperature
For 45 DEG C；After plastic reaction, reactant mixture enters aged cell, controls 65 DEG C of temperature, the min of aging 60, then with 65 DEG C
Deionized water is repeatedly washed, using the pH value of washes as 7, and washed product produces product in 122 DEG C of dry 8 h.Measure product
Pore volume is 0.487 mL/g, and specific surface area is 398.72 m2/g。
Embodiment 5
The flow for controlling gaseous mixture is 11.8 L/min（Flow can be adjusted according to the pH value of mixed liquor in course of reaction）, by gas
Body distributor, with concentration（In terms of aluminum oxide）Plastic reaction is carried out for 30 g/L aluminum sulfate solution, aluminum sulfate solution passes through compacted
Dynamic pump is passed through with 120 mL/min speed, and ammonia accounts for 60 vt% in gaseous mixture, and the pH value of reaction mixture is 10.5, gelling temperature
For 50 DEG C；After plastic reaction, reactant mixture enters aged cell, controls 70 DEG C of temperature, the min of aging 70, then with 70
DEG C deionized water is repeatedly washed, and using the pH value of washes as 6.8, washed product produces product in 125 DEG C of dry 6 h.Survey
It is 0.453 mL/g to obtain product pore volume, and specific surface area is 373.40 m2/g。
Embodiment 6
The flow for controlling gaseous mixture is 12.1 L/min（Flow can be adjusted according to the pH value of mixed liquor in course of reaction）, by gas
Body distributor, with concentration（In terms of aluminum oxide）Plastic reaction is carried out for 40 g/L aluminum sulfate solution, aluminum sulfate solution passes through compacted
Dynamic pump is passed through with 100 mL/min speed, and ammonia accounts for 65 vt% in gaseous mixture, and the pH value of reaction mixture is 9, and gelling temperature is
60 ℃；After plastic reaction, reactant mixture enters aged cell, controls 75 DEG C of temperature, the min of aging 100, then with 80 DEG C
Deionized water is repeatedly washed, using the pH value of washes as 6.9, and washed product produces product in 130 DEG C of dry 4 h.Measure production
It is 0.438 mL/g that sample wells, which is held, and specific surface area is 354.32 m2/g。
Embodiment 7
The flow for controlling gaseous mixture is 11.2 mL/min（Flow can be adjusted according to the pH value of mixed liquor in course of reaction）, pass through
Gas distributor, with concentration（In terms of aluminum oxide）Plastic reaction is carried out for 50 g/L aluminum sulfate solution, aluminum sulfate solution passes through
Peristaltic pump is passed through with 80 mL/min speed, and ammonia accounts for 70 vt% in gaseous mixture, and the pH value of reaction mixture is 10, gelling temperature
For 70 DEG C；After plastic reaction, reactant mixture enters aged cell, controls 80 DEG C of temperature, the min of aging 150, then with 90
DEG C deionized water is repeatedly washed, and using the pH value of washes as 7, washed product produces product in 130 DEG C of dry 2 h.Measure
Product pore volume is 0.398 mL/g, and specific surface area is 321.12 m2/g。
Embodiment 8
The flow for controlling gaseous mixture is 7 L/min（Flow can be adjusted according to the pH value of mixed liquor in course of reaction）, by gas
Distributor, with concentration（In terms of aluminum oxide）Plastic reaction is carried out for 60 g/L aluminum sulfate solution, aluminum sulfate solution is by wriggling
Pump is passed through with 50 mL/min speed, and ammonia accounts for 80 vt% in gaseous mixture, and the pH value of reaction mixture is 9, and gelling temperature is 80
℃；After plastic reaction, reactant mixture enters aged cell, controls 80 DEG C of temperature, the min of aging 180, then with 80 DEG C go from
Sub- water is repeatedly washed, using the pH value of washes as 6.9, and washed product produces product in 130 DEG C of dry 1 h.Measure product
Pore volume is 0.315 mL/g, and specific surface area is 281.34 m2/g。
Embodiment 9
The flow for controlling gaseous mixture is 3.0 L/min（Flow can be adjusted according to the pH value of mixed liquor in course of reaction）, by gas
Body distributor, with concentration（In terms of aluminum oxide）Plastic reaction is carried out for 20 g/L sodium aluminate solution, sodium aluminate solution leads to
Cross peristaltic pump to be passed through with 200 mL/min speed, carbon dioxide accounts for 30 vt% in gaseous mixture, and the pH value of reaction mixture is 10.5,
Gelling temperature is 85 DEG C；After plastic reaction, reactant mixture enters aged cell, controls 70 DEG C of temperature, the min of aging 70, so
Repeatedly washed with 85 DEG C of deionized waters afterwards, using the pH value of washes as 6.8, washed product is produced in 125 DEG C of dry 6 h
Product.Product pore volume is measured for 0.512 mL/g, specific surface area is 430.12 m2/g。
Embodiment 10
The flow for controlling gaseous mixture is 2.7 L/min（Flow can be adjusted according to the pH value of mixed liquor in course of reaction）, by gas
Body distributor, with concentration（In terms of aluminum oxide）Plastic reaction is carried out for 40 g/L sodium aluminate solution, sodium aluminate solution leads to
Cross peristaltic pump to be passed through with 100 mL/min speed, carbon dioxide accounts for 60 vt% in gaseous mixture, and the pH value of reaction mixture is 9, into
Glue temperature is 90 DEG C；After plastic reaction, reactant mixture enters aged cell, controls 75 DEG C of temperature, the min of aging 100, so
Repeatedly washed with 90 DEG C of deionized waters afterwards, using the pH value of washes as 6.9, washed product is produced in 130 DEG C of dry 4 h
Product.Product pore volume is measured for 0.431 mL/g, specific surface area is 380.25 m2/g。
Embodiment 11
The flow for controlling gaseous mixture is 1 L/min（Flow can be adjusted according to the pH value of mixed liquor in course of reaction）, by gas
Distributor, with concentration（In terms of aluminum oxide）Plastic reaction is carried out for 60 g/L sodium aluminate solution, sodium aluminate solution passes through
Peristaltic pump is passed through with 50 mL/min speed, and carbon dioxide accounts for 90 vt% in gaseous mixture, and the pH value of reaction mixture is 10, plastic
Temperature is 80 DEG C；After plastic reaction, reactant mixture enters aged cell, controls 60 DEG C of temperature, aging 90 min, Ran Houyong
100 DEG C of deionized waters are repeatedly washed, using the pH value of washes as 7, and washed product produces product in 120 DEG C of dry 5 h.
Product pore volume is measured for 0.354 mL/g, specific surface area is 298.17 m2/g。
Embodiment 12
With reference to the method for the embodiment of the present invention 5, when determining without gas distributor and using gas distributor, the product of preparation
Performance, parameter comparison result is as shown in table 1.
The properties of product of table 1 are contrasted
| Product index | Without using gas distributor | Use gas distributor |
| SiO2 ≤ | 0.30 | 0.30 |
| Fe2O3 ≤ | 0.03 | 0.03 |
| Na2O ≤ | 0.30 | 0.10 |
| Moisture≤ | 25 | 20 |
| Igloss≤ | 24 | 24 |
| Peptization index >= | 95 | 97 |
| Than surface m2/g ≥ | 340 | 373.40 |
| Pore volume mL/g >= | 0.451 | 0.453 |
| Gibbsite % (m)≤ | 5 | 2 |
Compared with the product prepared when as shown in Table 1, using gas distributor, the product prepared when without using gas distributor,
Pore volume is without significant change, but specific surface area is more than the product prepared during without using gas distributor, it is often more important that, with not making
Compared with gas distributor, using gas distributor can significantly improve product peptization index and reduction oxidation of impurities sodium and
Gibbsite content, this product can be used in the high-end boehmite market strict to impurity content requirement, market prospects
It is wide.
Claims (15)
1. a kind of method for preparing boehmite, it is characterised in that, should in the plastic reaction of silicon source solution and reacting gas
With gas distributor, reacting gas is by gas distributor and silicon source solution haptoreaction.
2. the method according to claim 1 for preparing boehmite, it is characterised in that：Described silicon source solution is acidity
Aluminum salt solution, reacting gas is ammonia gas mixture body；Or described silicon source solution is basic aluminium salt solution, reacting gas is two
Carbon dioxide gas mixture；In described ammonia gas mixture body, except ammonia, also containing air and/or nitrogen；Described titanium dioxide
In carbon mixed gas, except carbon dioxide, also containing air and/or nitrogen.
3. the method according to claim 2 for preparing boehmite, it is characterised in that：In described ammonia gas mixture body
Ammonia accounts for 40 ~ 80 vt%, and the average discharge of mixed gas is 7 ~ 13 L/min, and pressure is more than 0.1 MPa；Described carbon dioxide
Carbon dioxide in gas mixture accounts for 30 ~ 90 vt%, and the average discharge of mixed gas is 1 ~ 3 L/min, and pressure is more than 0.1 MPa.
4. the method according to claim 2 for preparing boehmite, it is characterised in that：Described acid aluminium salt solution is
Aluminum sulfate solution, the concentration of described aluminum sulfate solution is calculated as 10 ~ 60 g/L with aluminum oxide, and average discharge is 50 ~ 200 mL/
min；Described basic aluminium salt solution is sodium aluminate solution, the concentration of described sodium aluminate solution is calculated as 20 with aluminum oxide ~
60 g/L, average discharge is 50 ~ 200 mL/min.
5. the method according to claim 1 for preparing boehmite, it is characterised in that：Described gas distributor is many
Metafiltration net distributor or porous calandria distributor.
6. according to the method for preparing boehmite described in claim 6, it is characterised in that：Described gas distributor is five layers
Metal sintering filter screen, five layers of described metal sintering filter screen are from top to bottom successively including protective layer, key-course, shunting layer and two layers
Supporting layer；Five layers of described metal sintering filter screen material are sintering metal.
7. the method according to claim 1 for preparing boehmite, it is characterised in that：Described plastic reaction temperature is
30 ~ 90 DEG C, the pH value control of reaction mixture is 9 ~ 10.5.
8. the method for preparing boehmite according to claim 1 or 8, it is characterised in that：Also include aging reaction to walk
Suddenly, the reactant mixture obtained after plastic reaction terminates carries out aging reaction, and described aging temperature is 50 ~ 80 DEG C, time
For 30 ~ 200 min.
9. the method according to claim 9 for preparing boehmite, it is characterised in that：Also include separating, washing step,
Ageing products obtained by aging reaction are separated by filtration, repeatedly washed with distilled water, wash temperature is 50 ~ 100
DEG C, until the pH value of washes is 6.8 ~ 7.
10. the method according to claim 10 for preparing boehmite, it is characterised in that：Also include drying steps, will
Washed product obtained by separating, washing step is dried, and described drying temperature is 110 ~ 130 DEG C, and the time is 1 ~ 15 h.
11. the method according to claim 11 for preparing boehmite, it is characterised in that：The thin water aluminium of plan prepared
The pore volume of stone is 0.3 ~ 0.6 mL/g, and specific surface area is 280 ~ 450 m2/g。
12. a kind of purposes of gas distributor in boehmite prepares plastic reaction.
13. purposes according to claim 13, it is characterised in that：Described gas distributor be multistorey strainer mesh distributor or
Porous calandria distributor.
14. purposes according to claim 13, it is characterised in that：Described gas distributor is five layers of metal sintering filter
Net, five layers of described metal sintering filter screen include protective layer, key-course, shunting layer and two layers of supporting layer successively from top to bottom.
15. purposes according to claim 13, it is characterised in that：In the plastic reaction of silicon source solution and reacting gas,
Reacting gas is by gas distributor and silicon source solution haptoreaction.
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| CN109179461A (en) * | 2018-09-19 | 2019-01-11 | 孝义市泰兴铝镁有限公司 | A kind of low sodium boehmite and preparation method thereof, device |
| CN110790291A (en) * | 2018-08-01 | 2020-02-14 | 中国石油化工股份有限公司 | Preparation method of pseudo-boehmite |
| CN111377466A (en) * | 2018-12-27 | 2020-07-07 | 中国石油化工股份有限公司 | Preparation method of pseudo-boehmite and alumina prepared by same |
| 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 |
| CN114426297A (en) * | 2020-10-29 | 2022-05-03 | 中国石油化工股份有限公司 | Method for continuously preparing pseudoboehmite |
| CN115724448A (en) * | 2022-11-21 | 2023-03-03 | 岳阳慧璟新材料科技有限公司 | Process method for preparing pseudo-boehmite by continuous carbonization |
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| CN110790291A (en) * | 2018-08-01 | 2020-02-14 | 中国石油化工股份有限公司 | Preparation method of pseudo-boehmite |
| CN110790291B (en) * | 2018-08-01 | 2022-07-12 | 中国石油化工股份有限公司 | Preparation method of pseudo-boehmite |
| CN109179461A (en) * | 2018-09-19 | 2019-01-11 | 孝义市泰兴铝镁有限公司 | A kind of low sodium boehmite and preparation method thereof, device |
| CN109179461B (en) * | 2018-09-19 | 2021-03-23 | 孝义市泰兴铝镁有限公司 | Low-sodium pseudo-boehmite, preparation method and device thereof |
| CN111377466A (en) * | 2018-12-27 | 2020-07-07 | 中国石油化工股份有限公司 | Preparation method of pseudo-boehmite and alumina prepared by same |
| CN111377466B (en) * | 2018-12-27 | 2022-09-09 | 中国石油化工股份有限公司 | Preparation method of pseudo-boehmite and alumina prepared by same |
| CN114426297A (en) * | 2020-10-29 | 2022-05-03 | 中国石油化工股份有限公司 | Method for continuously preparing pseudoboehmite |
| 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 |
| CN115724448A (en) * | 2022-11-21 | 2023-03-03 | 岳阳慧璟新材料科技有限公司 | Process method for preparing pseudo-boehmite by continuous carbonization |
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