CN106693949A - Composition and method for preparing high-temperature resistance large-specific-surface-area aluminium oxide - Google Patents
Composition and method for preparing high-temperature resistance large-specific-surface-area aluminium oxide Download PDFInfo
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- CN106693949A CN106693949A CN201710041236.3A CN201710041236A CN106693949A CN 106693949 A CN106693949 A CN 106693949A CN 201710041236 A CN201710041236 A CN 201710041236A CN 106693949 A CN106693949 A CN 106693949A
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- earth metal
- aluminum oxide
- high temperature
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- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 title claims abstract description 24
- 239000000203 mixture Substances 0.000 title claims abstract description 20
- 238000000034 method Methods 0.000 title claims abstract description 9
- 229910002651 NO3 Inorganic materials 0.000 claims abstract description 34
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 claims abstract description 34
- 229910052761 rare earth metal Inorganic materials 0.000 claims abstract description 17
- 239000000843 powder Substances 0.000 claims abstract description 16
- 150000002910 rare earth metals Chemical class 0.000 claims abstract description 16
- 150000001342 alkaline earth metals Chemical class 0.000 claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 15
- 229910052784 alkaline earth metal Inorganic materials 0.000 claims abstract description 14
- 238000002360 preparation method Methods 0.000 claims abstract description 11
- 229910003158 γ-Al2O3 Inorganic materials 0.000 claims abstract description 11
- 238000010438 heat treatment Methods 0.000 claims abstract 2
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 29
- 238000007598 dipping method Methods 0.000 claims description 8
- 229910052593 corundum Inorganic materials 0.000 claims description 5
- 229910001845 yogo sapphire Inorganic materials 0.000 claims description 5
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 4
- 229910052684 Cerium Inorganic materials 0.000 claims description 4
- 229910052692 Dysprosium Inorganic materials 0.000 claims description 4
- 229910052691 Erbium Inorganic materials 0.000 claims description 4
- 229910052693 Europium Inorganic materials 0.000 claims description 4
- 229910052688 Gadolinium Inorganic materials 0.000 claims description 4
- 229910052689 Holmium Inorganic materials 0.000 claims description 4
- 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 4
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 4
- 229910052765 Lutetium Inorganic materials 0.000 claims description 4
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 4
- 229910052779 Neodymium Inorganic materials 0.000 claims description 4
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 claims description 4
- 229910052777 Praseodymium Inorganic materials 0.000 claims description 4
- 229910052773 Promethium Inorganic materials 0.000 claims description 4
- 229910052772 Samarium Inorganic materials 0.000 claims description 4
- 229910052771 Terbium Inorganic materials 0.000 claims description 4
- 229910052775 Thulium Inorganic materials 0.000 claims description 4
- 229910052769 Ytterbium Inorganic materials 0.000 claims description 4
- 229910052788 barium Inorganic materials 0.000 claims description 4
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 claims description 4
- 229910052790 beryllium Inorganic materials 0.000 claims description 4
- ATBAMAFKBVZNFJ-UHFFFAOYSA-N beryllium atom Chemical compound [Be] ATBAMAFKBVZNFJ-UHFFFAOYSA-N 0.000 claims description 4
- 229910052792 caesium Inorganic materials 0.000 claims description 4
- TVFDJXOCXUVLDH-UHFFFAOYSA-N caesium atom Chemical compound [Cs] TVFDJXOCXUVLDH-UHFFFAOYSA-N 0.000 claims description 4
- 229910052791 calcium Inorganic materials 0.000 claims description 4
- 239000011575 calcium Substances 0.000 claims description 4
- KBQHZAAAGSGFKK-UHFFFAOYSA-N dysprosium atom Chemical compound [Dy] KBQHZAAAGSGFKK-UHFFFAOYSA-N 0.000 claims description 4
- UYAHIZSMUZPPFV-UHFFFAOYSA-N erbium Chemical compound [Er] UYAHIZSMUZPPFV-UHFFFAOYSA-N 0.000 claims description 4
- OGPBJKLSAFTDLK-UHFFFAOYSA-N europium atom Chemical compound [Eu] OGPBJKLSAFTDLK-UHFFFAOYSA-N 0.000 claims description 4
- 229910052730 francium Inorganic materials 0.000 claims description 4
- KLMCZVJOEAUDNE-UHFFFAOYSA-N francium atom Chemical compound [Fr] KLMCZVJOEAUDNE-UHFFFAOYSA-N 0.000 claims description 4
- UIWYJDYFSGRHKR-UHFFFAOYSA-N gadolinium atom Chemical compound [Gd] UIWYJDYFSGRHKR-UHFFFAOYSA-N 0.000 claims description 4
- KJZYNXUDTRRSPN-UHFFFAOYSA-N holmium atom Chemical compound [Ho] KJZYNXUDTRRSPN-UHFFFAOYSA-N 0.000 claims description 4
- 229910052746 lanthanum Inorganic materials 0.000 claims description 4
- FZLIPJUXYLNCLC-UHFFFAOYSA-N lanthanum atom Chemical compound [La] FZLIPJUXYLNCLC-UHFFFAOYSA-N 0.000 claims description 4
- 229910052744 lithium Inorganic materials 0.000 claims description 4
- OHSVLFRHMCKCQY-UHFFFAOYSA-N lutetium atom Chemical compound [Lu] OHSVLFRHMCKCQY-UHFFFAOYSA-N 0.000 claims description 4
- 229910052749 magnesium Inorganic materials 0.000 claims description 4
- 239000011777 magnesium Substances 0.000 claims description 4
- QEFYFXOXNSNQGX-UHFFFAOYSA-N neodymium atom Chemical compound [Nd] QEFYFXOXNSNQGX-UHFFFAOYSA-N 0.000 claims description 4
- 229910052700 potassium Inorganic materials 0.000 claims description 4
- 239000011591 potassium Substances 0.000 claims description 4
- PUDIUYLPXJFUGB-UHFFFAOYSA-N praseodymium atom Chemical compound [Pr] PUDIUYLPXJFUGB-UHFFFAOYSA-N 0.000 claims description 4
- VQMWBBYLQSCNPO-UHFFFAOYSA-N promethium atom Chemical compound [Pm] VQMWBBYLQSCNPO-UHFFFAOYSA-N 0.000 claims description 4
- 229910052705 radium Inorganic materials 0.000 claims description 4
- HCWPIIXVSYCSAN-UHFFFAOYSA-N radium atom Chemical compound [Ra] HCWPIIXVSYCSAN-UHFFFAOYSA-N 0.000 claims description 4
- 229910052701 rubidium Inorganic materials 0.000 claims description 4
- IGLNJRXAVVLDKE-UHFFFAOYSA-N rubidium atom Chemical compound [Rb] IGLNJRXAVVLDKE-UHFFFAOYSA-N 0.000 claims description 4
- KZUNJOHGWZRPMI-UHFFFAOYSA-N samarium atom Chemical compound [Sm] KZUNJOHGWZRPMI-UHFFFAOYSA-N 0.000 claims description 4
- 229910052708 sodium Inorganic materials 0.000 claims description 4
- 239000011734 sodium Substances 0.000 claims description 4
- 229910052712 strontium Inorganic materials 0.000 claims description 4
- CIOAGBVUUVVLOB-UHFFFAOYSA-N strontium atom Chemical compound [Sr] CIOAGBVUUVVLOB-UHFFFAOYSA-N 0.000 claims description 4
- GZCRRIHWUXGPOV-UHFFFAOYSA-N terbium atom Chemical compound [Tb] GZCRRIHWUXGPOV-UHFFFAOYSA-N 0.000 claims description 4
- NAWDYIZEMPQZHO-UHFFFAOYSA-N ytterbium Chemical compound [Yb] NAWDYIZEMPQZHO-UHFFFAOYSA-N 0.000 claims description 4
- 239000008367 deionised water Substances 0.000 claims description 2
- 229910021641 deionized water Inorganic materials 0.000 claims description 2
- 238000003303 reheating Methods 0.000 claims description 2
- GWXLDORMOJMVQZ-UHFFFAOYSA-N cerium Chemical compound [Ce] GWXLDORMOJMVQZ-UHFFFAOYSA-N 0.000 claims 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims 1
- 229910052737 gold Inorganic materials 0.000 claims 1
- 239000010931 gold Substances 0.000 claims 1
- 239000000463 material Substances 0.000 abstract description 9
- 238000001035 drying Methods 0.000 abstract description 8
- 150000002823 nitrates Chemical class 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 238000010923 batch production Methods 0.000 abstract 1
- 230000002301 combined effect Effects 0.000 abstract 1
- 238000005470 impregnation Methods 0.000 abstract 1
- 239000003054 catalyst Substances 0.000 description 8
- FYDKNKUEBJQCCN-UHFFFAOYSA-N lanthanum(3+);trinitrate Chemical class [La+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O FYDKNKUEBJQCCN-UHFFFAOYSA-N 0.000 description 5
- YIXJRHPUWRPCBB-UHFFFAOYSA-N magnesium nitrate Chemical class [Mg+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O YIXJRHPUWRPCBB-UHFFFAOYSA-N 0.000 description 5
- 239000003643 water by type Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 239000007789 gas Substances 0.000 description 3
- ZMIGMASIKSOYAM-UHFFFAOYSA-N cerium Chemical compound [Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce] ZMIGMASIKSOYAM-UHFFFAOYSA-N 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000004220 aggregation Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910001593 boehmite Inorganic materials 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- FAHBNUUHRFUEAI-UHFFFAOYSA-M hydroxidooxidoaluminium Chemical compound O[Al]=O FAHBNUUHRFUEAI-UHFFFAOYSA-M 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- -1 rare earth metal salt Chemical class 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000005211 surface analysis Methods 0.000 description 1
- 230000001052 transient effect Effects 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
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/10—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of rare earths
-
- 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
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
- B01D53/94—Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
-
- 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
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/60—Catalysts, in general, characterised by their form or physical properties characterised by their surface properties or porosity
- B01J35/61—Surface area
- B01J35/615—100-500 m2/g
-
- 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
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/60—Catalysts, in general, characterised by their form or physical properties characterised by their surface properties or porosity
- B01J35/61—Surface area
- B01J35/617—500-1000 m2/g
-
- 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
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/60—Catalysts, in general, characterised by their form or physical properties characterised by their surface properties or porosity
- B01J35/61—Surface area
- B01J35/618—Surface area more than 1000 m2/g
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Combustion & Propulsion (AREA)
- Biomedical Technology (AREA)
- Environmental & Geological Engineering (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Catalysts (AREA)
Abstract
The invention discloses a composition and method for preparing high-temperature resistance large-specific-surface-area aluminium oxide. The composition comprises gamma-Al2O3, nitrate of rare-earth metals, nitrate of alkaline-earth metals and water. The preparation method comprises the steps of: 1, firstly, dissolving the nitrate of rare-earth metals and the nitrate of alkaline-earth metals into the water, and after the nitrate of rare-earth metals and the nitrate of alkaline-earth metals are completely dissolved, adding gamma-Al2O3 to carry out impregnation; 2, drying the impregnated gamma-Al2O3 to obtain powder; 3, drying the obtained powder, then heating to decompose the nitrates, and then roasting to obtain a finished product. According to the invention, all the components are scientifically matched, and in the preparing process, all the components take a combined effect so as to prepare an aluminium oxide material with good high-temperature resistance and a large specific surface area; the obtained aluminium oxide material can keep a specific surface area of over 120m<2>/g under a high temperature of 1,100 DEG C; the preparation method is simple, low in production cost and convenient for batch production.
Description
Technical field
The present invention relates to aluminum oxide technology field, and in particular to a kind of combination for preparing high temperature resistant bigger serface aluminum oxide
The preparation method of thing and aluminum oxide.
Background technology
With the progress of economic society, auto industry is developed rapidly, the surge of automobile quantity so that vehicle exhaust
The environmental pollution for causing is also increasingly serious.Every country and area also accordingly propose increasingly stricter emission control regulations,
And in treating vehicle exhaust, catalyst has conclusive effect.
For cleaning catalyst for tail gases of automobiles, aluminum oxide is a kind of very good again economic carrier.But existing γ-
Al2O3High temperature can not be born, α phases can be transformed into about 1000~1200 DEG C of temperature, cause specific surface to reduce rapidly, cause table
The active component aggregation of face load, so that catalyst activity is decreased obviously, therefore stablizes the structure of aluminum oxide, makes it in high temperature
It is lower to keep big specific surface area, prevent from being converted into the alpha-type aluminum oxide of small specific surface product, this is for improving the thermally-stabilised of catalyst
Property, there is great meaning.
By retrieval, the F.oudet of France etc. (J.Catalysst, 114,112-120 (1998)) La (NO3)3Dipping
Calcined 12 hours through 1150 DEG C after boehmite, specific surface 63m2/g.European patent (EP222471) describes alumina surface
After Ba salt is calcined 50 hours at 1450 DEG C, specific surface area is 10m2/g.French Patent (FRP) (FP2596397) describes alumina surface
After being calcined 12 hours at 1150 DEG C after dipping rare earth metal salt, specific surface area is 50~60m2/g.Therefore, a kind of resistance to height is developed
The big aluminum oxide of temperature, specific surface area has turned into the technical problem of urgent need to resolve.
The content of the invention
In view of this, it is an object of the invention to provide a kind of composition and system for preparing high temperature resistant bigger serface aluminum oxide
Preparation Method, having solved existing aluminium oxide catalyst can not bear high temperature, and the α types oxidation of small specific surface product can be transformed at high temperature
Aluminium, causes the technical problem of activity reduction.
The present invention prepares the composition of high temperature resistant bigger serface aluminum oxide, counts by weight, including：γ-Al2O355
~75 parts, 12~30 parts of the nitrate of rare earth metal, 10~20 parts of the nitrate of alkaline-earth metal, and 200~270 parts of water.
Preferably, the composition for preparing high temperature resistant bigger serface aluminum oxide is counted by weight, including：γ-
Al2O360~70 parts, 17~25 parts of the nitrate of rare earth metal, 12~17 parts of the nitrate of alkaline-earth metal, and water 210~260
Part.
Preferably, the composition for preparing high temperature resistant bigger serface aluminum oxide is counted by weight, including：γ-
Al2O365 parts, 21 parts of the nitrate of rare earth metal, 15 parts of the nitrate of alkaline-earth metal, and 240 parts of water.
Preferably, the rare earth metal is lanthanum, cerium, praseodymium, neodymium, promethium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium and lutetium
In one kind, or the rare earth metal be lanthanum, cerium, praseodymium, neodymium, promethium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium and lutetium at least
The mixture of two kinds of arbitrary proportion.
Preferably, the alkaline-earth metal is the one kind in lithium, sodium, potassium, rubidium, caesium, francium, beryllium, magnesium, calcium, strontium, barium and radium,
Or the arbitrary proportion that the alkaline-earth metal is in lithium, sodium, potassium, rubidium, caesium, francium, beryllium, magnesium, calcium, strontium, barium and radium at least two is mixed
Compound.
Preferably, the water is deionized water.
The present invention prepares the side of aluminum oxide using foregoing any one composition for preparing high temperature resistant bigger serface aluminum oxide
Method, comprises the following steps：
1) it is first that the nitrate of the nitrate of rare earth metal and alkaline-earth metal is soluble in water, dissolving completely after add γ-
Al2O3, impregnated；
2) by the γ-Al after dipping2O3Dried at a temperature of 110 DEG C~130 DEG C, obtain powder；
3) gained powder is dried more than 10 hours at 130 DEG C~150 DEG C, reheating reduces nitrate, and then exists again
It is calcined at 800 DEG C~900 DEG C, obtains finished product.
Preferably, the temperature of the dipping is 40 DEG C~60 DEG C, the time of dipping is 5~10 hours.
Preferably, the temperature of the heat resolve nitrate is 300 DEG C~360 DEG C.
Preferably, the time of the roasting is 6~10 hours.
Beneficial effects of the present invention：
The present invention prepares the composition of high temperature resistant bigger serface aluminum oxide and the preparation method of aluminum oxide, by γ-Al2O3、
The nitrate of rare earth metal, the nitrate of alkaline-earth metal and water carry out scientific matching, and each component is made jointly in preparation process
With being obtained that resistance to elevated temperatures is good, the big alumina material of specific surface area；Gained alumina material is roasted at a high temperature of 1100 DEG C
Burn 3~5 hours, specific surface area can be kept in 120m2/ more than g；And preparation method of the present invention is simple, low production cost is easy to criticize
Amount production, has good prospect in terms of cleaning catalyst for tail gases of automobiles.
Specific embodiment
With reference to embodiment, the invention will be further described.
Embodiment one：
16g lanthanum nitrates, 6g cerous nitrates and 15g magnesium nitrates are dissolved in 240g deionized waters, 65g is added after dissolving completely
γ-Al2O3, impregnated 8 hours in 50 DEG C under conditions of being sufficiently stirred for.Then dried at a temperature of 140 DEG C, obtain powder；By powder
End is dried 10 hours at 130 DEG C, moisture content is fully volatilized.Material after drying is uniformly shared and is placed in crucible, at 330 DEG C
Fully reduce nitrate down, then be calcined 8 hours at 800 DEG C, obtain finished product.
Embodiment two：
19g lanthanum nitrates, 6g cerous nitrates and 17g magnesium nitrates are dissolved in 260g deionized waters, 60g is added after dissolving completely
γ-Al2O3, impregnated 10 hours in 40 DEG C under conditions of being sufficiently stirred for.Then dried at a temperature of 130 DEG C, obtain powder；Will
Powder is dried 10 hours at 130 DEG C, moisture content is fully volatilized.Material after drying is uniformly shared and is placed in crucible, 330
Fully reduced nitrate at DEG C, then be calcined 8 hours at 900 DEG C, obtain finished product.
Embodiment three：
13g lanthanum nitrates, 4g cerous nitrates and 12g magnesium nitrates are dissolved in 210g deionized waters, 70g is added after dissolving completely
γ-Al2O3, impregnated 5 hours in 60 DEG C under conditions of being sufficiently stirred for.Then dried at a temperature of 150 DEG C, obtain powder；By powder
End is dried 10 hours at 130 DEG C, moisture content is fully volatilized.Material after drying is uniformly shared and is placed in crucible, at 330 DEG C
Fully reduce nitrate down, then be calcined 8 hours at 850 DEG C, obtain finished product.
Example IV：
20g lanthanum nitrates, 8g cerous nitrates and 20g magnesium nitrates are dissolved in 200g deionized waters, 75g is added after dissolving completely
γ-Al2O3, impregnated 5 hours in 60 DEG C under conditions of being sufficiently stirred for.Then dried at a temperature of 150 DEG C, obtain powder；By powder
End is dried 10 hours at 130 DEG C, moisture content is fully volatilized.Material after drying is uniformly shared and is placed in crucible, at 330 DEG C
Fully reduce nitrate down, then be calcined 8 hours at 900 DEG C, obtain finished product.
Embodiment five：
30g lanthanum nitrates and 20g magnesium nitrates are dissolved in 270g deionized waters, 55g γ-Al are added after dissolving completely2O3,
Impregnated 8 hours in 50 DEG C under conditions of being sufficiently stirred for.Then dried at a temperature of 150 DEG C, obtain powder；By powder at 130 DEG C
Lower drying 10 hours, makes moisture content fully volatilize.Material after drying is uniformly shared and is placed in crucible, fully divide at 330 DEG C
Solution nitrate, then be calcined 8 hours at 900 DEG C, obtain finished product.
Generally, the temperature of vehicle exhaust be 700 DEG C~800 DEG C between, more than 1000 DEG C of transient state also occurs
Value, be currently used for as the aluminum oxide of catalyst more than 1000 DEG C under conditions of, it may occur that be modified, be changed into α phases, specific surface
Product can be greatly reduced, therefore can cause exhaust emissions situation not up to standard.Technique effect to illustrate the invention, respectively by above-mentioned reality
Apply a products obtained therefrom to be calcined at a high temperature of 1100 DEG C 3 hours, the then aperture using model SSA-4200 and surface analysis
Instrument is measured, and testing result is shown in Table 1.
Table 1
| Product | Specific surface area |
| Embodiment one | 143m2/g |
| Embodiment two | 128m2/g |
| Embodiment three | 135m2/g |
| Example IV | 133m2/g |
| Embodiment five | 123m2/g |
| Existing commercially available prod | 70~80m2/g |
As seen from the above table, present invention gained aluminum oxide will not occur in a disguised form after high temperature is calcined for a long time, and specific surface area is not
Can reduce, good thermal stability, performance of the aluminum oxide as catalyst fully ensured that, so as to also ensure that car tail well
The qualified discharge of gas.
Finally illustrate, the above embodiments are merely illustrative of the technical solutions of the present invention and it is unrestricted, although with reference to compared with
Good embodiment has been described in detail to the present invention, it will be understood by those within the art that, can be to skill of the invention
Art scheme is modified or equivalent, and without deviating from the objective and scope of technical solution of the present invention, it all should cover at this
In the middle of the right of invention.
Claims (10)
1. a kind of composition for preparing high temperature resistant bigger serface aluminum oxide, it is characterised in that：Count by weight, including：γ-
Al2O355~75 parts, 12~30 parts of the nitrate of rare earth metal, 10~20 parts of the nitrate of alkaline-earth metal, and water 200~
270 parts.
2. it is according to claim 1 prepare high temperature resistant bigger serface aluminum oxide composition, it is characterised in that：By weight
Number meter, including：γ-Al2O360~70 parts, 17~25 parts of the nitrate of rare earth metal, the nitrate 12~17 of alkaline-earth metal
Part, and 210~260 parts of water.
3. it is according to claim 1 prepare high temperature resistant bigger serface aluminum oxide composition, it is characterised in that：By weight
Number meter, including：γ-Al2O365 parts, 21 parts of the nitrate of rare earth metal, 15 parts of the nitrate of alkaline-earth metal, and water 240
Part.
4. the composition of the preparation high temperature resistant bigger serface aluminum oxide according to any one of claim 1-3, its feature
It is：The rare earth metal is the one kind in lanthanum, cerium, praseodymium, neodymium, promethium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium and lutetium, or institute
State the arbitrary proportion that rare earth metal is in lanthanum, cerium, praseodymium, neodymium, promethium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium and lutetium at least two
Mixture.
5. the composition of the preparation high temperature resistant bigger serface aluminum oxide according to any one of claim 1-3, its feature
It is：The alkaline-earth metal be lithium, sodium, potassium, rubidium, caesium, francium, beryllium, magnesium, calcium, strontium, barium and radium in one kind, or the alkaline earth gold
It is the mixture of at least two arbitrary proportion in lithium, sodium, potassium, rubidium, caesium, francium, beryllium, magnesium, calcium, strontium, barium and radium to belong to.
6. the composition of the preparation high temperature resistant bigger serface aluminum oxide according to any one of claim 1-3, its feature
It is：The water is deionized water.
7. the method that composition described in a kind of use claim any one of 1-6 prepares high temperature resistant bigger serface aluminum oxide, its
It is characterised by：Comprise the following steps：
1) it is first that the nitrate of the nitrate of rare earth metal and alkaline-earth metal is soluble in water, add γ-Al after dissolving completely2O3,
Impregnated；
2) by the γ-Al after dipping2O3Dried at a temperature of 110 DEG C~130 DEG C, obtain powder；
3) gained powder is dried more than 10 hours at 130 DEG C~150 DEG C, reheating reduces nitrate, then again at 800 DEG C
It is calcined at~900 DEG C, obtains finished product.
8. the method for preparing high temperature resistant bigger serface aluminum oxide according to claim 7, it is characterised in that：The dipping
Temperature is 40 DEG C~60 DEG C, and the time of dipping is 5~10 hours.
9. the method for preparing high temperature resistant bigger serface aluminum oxide according to claim 7, it is characterised in that：The heating point
The temperature for solving nitrate is 300 DEG C~360 DEG C.
10. the method for preparing high temperature resistant bigger serface aluminum oxide according to claim 7, it is characterised in that：The roasting
Time be 6~10 hours.
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| CN101168125A (en) * | 2006-10-25 | 2008-04-30 | 中国科学院大连化学物理研究所 | Method for preparing large surface improved aluminium oxide with high temperature resistant performance |
| CN102491389A (en) * | 2011-11-29 | 2012-06-13 | 重庆海特汽车排气系统有限公司 | Preparation method of high-temperature-resistant alumina with large specific surface area |
| CN102989442A (en) * | 2012-12-03 | 2013-03-27 | 上海华明高纳稀土新材料有限公司 | Heat-resistant modified alumina and preparation method thereof |
| CN103521272A (en) * | 2013-10-15 | 2014-01-22 | 杨云逸 | High-temperature-resistant aluminum oxide with large specific surface area and preparation method thereof |
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2017
- 2017-01-18 CN CN201710041236.3A patent/CN106693949A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101168125A (en) * | 2006-10-25 | 2008-04-30 | 中国科学院大连化学物理研究所 | Method for preparing large surface improved aluminium oxide with high temperature resistant performance |
| CN102491389A (en) * | 2011-11-29 | 2012-06-13 | 重庆海特汽车排气系统有限公司 | Preparation method of high-temperature-resistant alumina with large specific surface area |
| CN102989442A (en) * | 2012-12-03 | 2013-03-27 | 上海华明高纳稀土新材料有限公司 | Heat-resistant modified alumina and preparation method thereof |
| CN103521272A (en) * | 2013-10-15 | 2014-01-22 | 杨云逸 | High-temperature-resistant aluminum oxide with large specific surface area and preparation method thereof |
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