JP4313117B2 - 金属酸化物被覆アルミナ複合酸化物 - Google Patents
金属酸化物被覆アルミナ複合酸化物 Download PDFInfo
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- JP4313117B2 JP4313117B2 JP2003288063A JP2003288063A JP4313117B2 JP 4313117 B2 JP4313117 B2 JP 4313117B2 JP 2003288063 A JP2003288063 A JP 2003288063A JP 2003288063 A JP2003288063 A JP 2003288063A JP 4313117 B2 JP4313117 B2 JP 4313117B2
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- Prior art keywords
- oxide
- alumina
- metal
- metal oxide
- coating layer
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- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 title claims description 117
- 229910044991 metal oxide Inorganic materials 0.000 title claims description 65
- 150000004706 metal oxides Chemical class 0.000 title claims description 65
- 239000002131 composite material Substances 0.000 title claims description 35
- 239000011148 porous material Substances 0.000 claims description 85
- 229910052751 metal Inorganic materials 0.000 claims description 27
- 239000002184 metal Substances 0.000 claims description 27
- 239000011247 coating layer Substances 0.000 claims description 26
- 238000000034 method Methods 0.000 claims description 21
- 150000002736 metal compounds Chemical class 0.000 claims description 16
- 150000002739 metals Chemical class 0.000 claims description 13
- 239000002904 solvent Substances 0.000 claims description 10
- 238000005470 impregnation Methods 0.000 claims description 9
- 238000010304 firing Methods 0.000 claims description 8
- 239000010955 niobium Substances 0.000 claims description 8
- 229910052684 Cerium Inorganic materials 0.000 claims description 6
- GWXLDORMOJMVQZ-UHFFFAOYSA-N cerium Chemical compound [Ce] GWXLDORMOJMVQZ-UHFFFAOYSA-N 0.000 claims description 6
- 229910052693 Europium Inorganic materials 0.000 claims description 4
- OGPBJKLSAFTDLK-UHFFFAOYSA-N europium atom Chemical compound [Eu] OGPBJKLSAFTDLK-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
- 229910052758 niobium Inorganic materials 0.000 claims description 4
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 claims description 4
- VSZWPYCFIRKVQL-UHFFFAOYSA-N selanylidenegallium;selenium Chemical compound [Se].[Se]=[Ga].[Se]=[Ga] VSZWPYCFIRKVQL-UHFFFAOYSA-N 0.000 claims description 4
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 4
- 229910052721 tungsten Inorganic materials 0.000 claims description 4
- 239000010937 tungsten Substances 0.000 claims description 4
- 229910052727 yttrium Inorganic materials 0.000 claims description 4
- VWQVUPCCIRVNHF-UHFFFAOYSA-N yttrium atom Chemical compound [Y] VWQVUPCCIRVNHF-UHFFFAOYSA-N 0.000 claims description 4
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 3
- 238000007654 immersion Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 229910052750 molybdenum Inorganic materials 0.000 claims description 3
- 239000011733 molybdenum Substances 0.000 claims description 3
- 239000011248 coating agent Substances 0.000 description 30
- 238000000576 coating method Methods 0.000 description 30
- 239000007864 aqueous solution Substances 0.000 description 26
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 20
- 230000000704 physical effect Effects 0.000 description 20
- 239000003054 catalyst Substances 0.000 description 19
- 238000006243 chemical reaction Methods 0.000 description 15
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 description 14
- 229910001928 zirconium oxide Inorganic materials 0.000 description 14
- 229910000420 cerium oxide Inorganic materials 0.000 description 11
- BMMGVYCKOGBVEV-UHFFFAOYSA-N oxo(oxoceriooxy)cerium Chemical compound [Ce]=O.O=[Ce]=O BMMGVYCKOGBVEV-UHFFFAOYSA-N 0.000 description 10
- 239000000463 material Substances 0.000 description 9
- 239000000243 solution Substances 0.000 description 7
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 6
- 238000009826 distribution Methods 0.000 description 6
- 238000001035 drying Methods 0.000 description 6
- 239000010410 layer Substances 0.000 description 6
- SIWVEOZUMHYXCS-UHFFFAOYSA-N oxo(oxoyttriooxy)yttrium Chemical compound O=[Y]O[Y]=O SIWVEOZUMHYXCS-UHFFFAOYSA-N 0.000 description 6
- DDPNPTNFVDEJOH-UHFFFAOYSA-N [O-2].[Zr+4].[O-2].[Ce+3] Chemical compound [O-2].[Zr+4].[O-2].[Ce+3] DDPNPTNFVDEJOH-UHFFFAOYSA-N 0.000 description 5
- 239000000969 carrier Substances 0.000 description 5
- 238000002485 combustion reaction Methods 0.000 description 5
- 238000006477 desulfuration reaction Methods 0.000 description 5
- 230000023556 desulfurization Effects 0.000 description 5
- 229910000476 molybdenum oxide Inorganic materials 0.000 description 5
- PQQKPALAQIIWST-UHFFFAOYSA-N oxomolybdenum Chemical compound [Mo]=O PQQKPALAQIIWST-UHFFFAOYSA-N 0.000 description 5
- 239000003208 petroleum Substances 0.000 description 5
- 239000002002 slurry Substances 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 4
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 description 4
- HSJPMRKMPBAUAU-UHFFFAOYSA-N cerium(3+);trinitrate Chemical compound [Ce+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O HSJPMRKMPBAUAU-UHFFFAOYSA-N 0.000 description 4
- QGLKJKCYBOYXKC-UHFFFAOYSA-N nonaoxidotritungsten Chemical compound O=[W]1(=O)O[W](=O)(=O)O[W](=O)(=O)O1 QGLKJKCYBOYXKC-UHFFFAOYSA-N 0.000 description 4
- 229910001930 tungsten oxide Inorganic materials 0.000 description 4
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- 238000011068 loading method Methods 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 239000011787 zinc oxide Substances 0.000 description 3
- 229910052726 zirconium Inorganic materials 0.000 description 3
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 239000003463 adsorbent Substances 0.000 description 2
- ANBBXQWFNXMHLD-UHFFFAOYSA-N aluminum;sodium;oxygen(2-) Chemical compound [O-2].[O-2].[Na+].[Al+3] ANBBXQWFNXMHLD-UHFFFAOYSA-N 0.000 description 2
- 239000011609 ammonium molybdate Substances 0.000 description 2
- 229940010552 ammonium molybdate Drugs 0.000 description 2
- 238000006356 dehydrogenation reaction Methods 0.000 description 2
- 239000008367 deionised water Substances 0.000 description 2
- 229910021641 deionized water Inorganic materials 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- NNPPMTNAJDCUHE-UHFFFAOYSA-N isobutane Chemical compound CC(C)C NNPPMTNAJDCUHE-UHFFFAOYSA-N 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- -1 oxoacid salt Chemical class 0.000 description 2
- 238000002459 porosimetry Methods 0.000 description 2
- 229910001388 sodium aluminate Inorganic materials 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- POILWHVDKZOXJZ-ARJAWSKDSA-M (z)-4-oxopent-2-en-2-olate Chemical compound C\C([O-])=C\C(C)=O POILWHVDKZOXJZ-ARJAWSKDSA-M 0.000 description 1
- OBOSXEWFRARQPU-UHFFFAOYSA-N 2-n,2-n-dimethylpyridine-2,5-diamine Chemical compound CN(C)C1=CC=C(N)C=N1 OBOSXEWFRARQPU-UHFFFAOYSA-N 0.000 description 1
- NGDQQLAVJWUYSF-UHFFFAOYSA-N 4-methyl-2-phenyl-1,3-thiazole-5-sulfonyl chloride Chemical compound S1C(S(Cl)(=O)=O)=C(C)N=C1C1=CC=CC=C1 NGDQQLAVJWUYSF-UHFFFAOYSA-N 0.000 description 1
- KEDNSMBVYXSBFC-UHFFFAOYSA-N 6-bromo-2-chloroquinoline-4-carbonyl chloride Chemical compound C1=C(Br)C=C2C(C(=O)Cl)=CC(Cl)=NC2=C1 KEDNSMBVYXSBFC-UHFFFAOYSA-N 0.000 description 1
- QTBSBXVTEAMEQO-UHFFFAOYSA-M Acetate Chemical compound CC([O-])=O QTBSBXVTEAMEQO-UHFFFAOYSA-M 0.000 description 1
- CPELXLSAUQHCOX-UHFFFAOYSA-M Bromide Chemical compound [Br-] CPELXLSAUQHCOX-UHFFFAOYSA-M 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 description 1
- 229910002651 NO3 Inorganic materials 0.000 description 1
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 1
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 description 1
- XITGHTRVSNMXOD-UHFFFAOYSA-N [Nb].ClOCl Chemical compound [Nb].ClOCl XITGHTRVSNMXOD-UHFFFAOYSA-N 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 238000007605 air drying Methods 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 150000004703 alkoxides Chemical class 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical class [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 description 1
- 150000004645 aluminates Chemical class 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- APUPEJJSWDHEBO-UHFFFAOYSA-P ammonium molybdate Chemical compound [NH4+].[NH4+].[O-][Mo]([O-])(=O)=O APUPEJJSWDHEBO-UHFFFAOYSA-P 0.000 description 1
- 235000018660 ammonium molybdate Nutrition 0.000 description 1
- 150000003863 ammonium salts Chemical class 0.000 description 1
- 239000012298 atmosphere Substances 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- VYLVYHXQOHJDJL-UHFFFAOYSA-K cerium trichloride Chemical compound Cl[Ce](Cl)Cl VYLVYHXQOHJDJL-UHFFFAOYSA-K 0.000 description 1
- OZECDDHOAMNMQI-UHFFFAOYSA-H cerium(3+);trisulfate Chemical compound [Ce+3].[Ce+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O OZECDDHOAMNMQI-UHFFFAOYSA-H 0.000 description 1
- MOOUSOJAOQPDEH-UHFFFAOYSA-K cerium(iii) bromide Chemical compound [Br-].[Br-].[Br-].[Ce+3] MOOUSOJAOQPDEH-UHFFFAOYSA-K 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- CNRRZWMERIANGJ-UHFFFAOYSA-N chloro hypochlorite;molybdenum Chemical compound [Mo].ClOCl CNRRZWMERIANGJ-UHFFFAOYSA-N 0.000 description 1
- BWKCCRPHMILRGD-UHFFFAOYSA-N chloro hypochlorite;tungsten Chemical compound [W].ClOCl BWKCCRPHMILRGD-UHFFFAOYSA-N 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- XAYGUHUYDMLJJV-UHFFFAOYSA-Z decaazanium;dioxido(dioxo)tungsten;hydron;trioxotungsten Chemical compound [H+].[H+].[NH4+].[NH4+].[NH4+].[NH4+].[NH4+].[NH4+].[NH4+].[NH4+].[NH4+].[NH4+].O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.[O-][W]([O-])(=O)=O.[O-][W]([O-])(=O)=O.[O-][W]([O-])(=O)=O.[O-][W]([O-])(=O)=O.[O-][W]([O-])(=O)=O.[O-][W]([O-])(=O)=O XAYGUHUYDMLJJV-UHFFFAOYSA-Z 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- QEDFUJZRPHEBFG-UHFFFAOYSA-K europium(3+);tribromide Chemical compound Br[Eu](Br)Br QEDFUJZRPHEBFG-UHFFFAOYSA-K 0.000 description 1
- GAGGCOKRLXYWIV-UHFFFAOYSA-N europium(3+);trinitrate Chemical compound [Eu+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O GAGGCOKRLXYWIV-UHFFFAOYSA-N 0.000 description 1
- NNMXSTWQJRPBJZ-UHFFFAOYSA-K europium(iii) chloride Chemical compound Cl[Eu](Cl)Cl NNMXSTWQJRPBJZ-UHFFFAOYSA-K 0.000 description 1
- WLYAEQLCCOGBPV-UHFFFAOYSA-N europium;sulfuric acid Chemical compound [Eu].OS(O)(=O)=O WLYAEQLCCOGBPV-UHFFFAOYSA-N 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- XMBWDFGMSWQBCA-UHFFFAOYSA-N hydrogen iodide Chemical compound I XMBWDFGMSWQBCA-UHFFFAOYSA-N 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 1
- 229910017053 inorganic salt Inorganic materials 0.000 description 1
- 239000001282 iso-butane Substances 0.000 description 1
- 150000002576 ketones Chemical class 0.000 description 1
- JLRJWBUSTKIQQH-UHFFFAOYSA-K lanthanum(3+);triacetate Chemical compound [La+3].CC([O-])=O.CC([O-])=O.CC([O-])=O JLRJWBUSTKIQQH-UHFFFAOYSA-K 0.000 description 1
- FYDKNKUEBJQCCN-UHFFFAOYSA-N lanthanum(3+);trinitrate Chemical compound [La+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O FYDKNKUEBJQCCN-UHFFFAOYSA-N 0.000 description 1
- XKUYOJZZLGFZTC-UHFFFAOYSA-K lanthanum(iii) bromide Chemical compound Br[La](Br)Br XKUYOJZZLGFZTC-UHFFFAOYSA-K 0.000 description 1
- ICAKDTKJOYSXGC-UHFFFAOYSA-K lanthanum(iii) chloride Chemical compound Cl[La](Cl)Cl ICAKDTKJOYSXGC-UHFFFAOYSA-K 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 229910001510 metal chloride Inorganic materials 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- JKQOBWVOAYFWKG-UHFFFAOYSA-N molybdenum trioxide Chemical compound O=[Mo](=O)=O JKQOBWVOAYFWKG-UHFFFAOYSA-N 0.000 description 1
- PDKHNCYLMVRIFV-UHFFFAOYSA-H molybdenum;hexachloride Chemical compound [Cl-].[Cl-].[Cl-].[Cl-].[Cl-].[Cl-].[Mo] PDKHNCYLMVRIFV-UHFFFAOYSA-H 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 230000003472 neutralizing effect Effects 0.000 description 1
- UJVRJBAUJYZFIX-UHFFFAOYSA-N nitric acid;oxozirconium Chemical compound [Zr]=O.O[N+]([O-])=O.O[N+]([O-])=O UJVRJBAUJYZFIX-UHFFFAOYSA-N 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- YOUIDGQAIILFBW-UHFFFAOYSA-J tetrachlorotungsten Chemical compound Cl[W](Cl)(Cl)Cl YOUIDGQAIILFBW-UHFFFAOYSA-J 0.000 description 1
- 229910052716 thallium Inorganic materials 0.000 description 1
- BKVIYDNLLOSFOA-UHFFFAOYSA-N thallium Chemical compound [Tl] BKVIYDNLLOSFOA-UHFFFAOYSA-N 0.000 description 1
- ZNOKGRXACCSDPY-UHFFFAOYSA-N tungsten trioxide Chemical compound O=[W](=O)=O ZNOKGRXACCSDPY-UHFFFAOYSA-N 0.000 description 1
- 238000009849 vacuum degassing Methods 0.000 description 1
- 229940105965 yttrium bromide Drugs 0.000 description 1
- 229910000347 yttrium sulfate Inorganic materials 0.000 description 1
- RTAYJOCWVUTQHB-UHFFFAOYSA-H yttrium(3+);trisulfate Chemical compound [Y+3].[Y+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O RTAYJOCWVUTQHB-UHFFFAOYSA-H 0.000 description 1
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- Exhaust Gas Treatment By Means Of Catalyst (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
- Catalysts (AREA)
Description
また、γ-アルミナ担体の表面に、含浸法によって、3価あるいはそれ以上の原子価を有する金属の酸化物を実質的に完全に被覆せしめ、被覆後の細孔分布が均一で大きな細孔容積を維持した表面積の大きい金属酸化物被覆アルミナ複合酸化物は知られていない。
また、本発明は、表面積150m 2 /g以上、細孔容積0.55cm 3 /g以上、及び平均細孔径100〜300Åであって細孔径100〜300Åの細孔が全細孔容積の60%以上を占めるγ-アルミナ担体を3価又はそれ以上の原子価を有する金属から選ばれた1種又は2種以上の金属化合物の金属化合物溶液中に浸漬し、この浸漬時にγ-アルミナ担体の細孔中の気泡を減圧脱気して焼成後の金属酸化物含有量が30〜45重量%の範囲となるようにγ-アルミナ担体に金属化合物溶液を含浸させ、次いで溶剤を除去して400〜800℃で焼成することを特徴とする触媒材料として有用な金属酸化物被覆アルミナ複合酸化物の製造方法である。
〔γ-アルミナ担体の調製〕
11.6重量%の硫酸水溶液0.15Lと脱イオン水10Lとを反応容器に仕込み、90℃に加熱した後、攪拌下にAl2O3濃度69g/Lのアルミン酸ソーダ水溶液0.39Lを一度に添加し、pH10のスラリー状水酸化アルミニウム水溶液を得た。
結果を表1に示す。
上で得られた9種の各pHスイング回数毎のγ-アルミナ担体10.0gをナス型フラスコに採り、これにZrO2/Al2O3重量比が40/60の割合となるように15wt%-オキシ硝酸ジルコニウム(ZrO(NO3)2)水溶液を投入して50torrに減圧して担体中の気泡を除去した。次いでエバポレーターで水分を除去して、恒温槽にて120℃で3時間乾燥せしめ、空気を流通させたマッフル炉にて500℃で3時間焼成して表面に酸化ジルコニウムの被覆層が担持された9種の酸化ジルコニウム被覆アルミナ複合酸化物(ZrO2/Al2O3)を得た。
また、酸化ジルコニウム担持後のサンプルは酸化ジルコニウムの担持によって重量が増加しているため仕込みのアルミナ担体と担持したジルコニウムの重量比(ZrO2/Al2O3)=40/60を用いた補正によって、この酸化ジルコニウム被覆アルミナ複合酸化物(ZrO2/Al2O3)における仕込みのγ-アルミナ担体基準の細孔容積(cm3/g-Al2O3)、表面積(cm2/g-Al2O3)を補正により求め、酸化ジルコニウムの被覆前後におけるγ-アルミナ担体重量当りの細孔容積の減少量を求めた。
結果を表2に示す。
実施例1で用いた9種類のアルミナ担体に対して、15wt%-オキシ硝酸ジルコニウム(ZrO(NO3)2)水溶液の代わりに15wt%-硝酸イットリウム(Y(NO3)3)水溶液を(Y2O3/ Al2O3)=40/60の重量比となるように用いた以外は実施例1と同様の手順で、酸化イットリウム被覆アルミナ複合酸化物を調製した。表3に酸化イットリウム被覆前後のアルミナ担体と酸化イットリウム被覆アルミナ複合酸化物の物理性状を示す。
実施例1で用いた9種類のアルミナ担体に対して、15wt%-オキシ硝酸ジルコニウム(ZrO(NO3)2)水溶液の代わりに15wt%-モリブデン酸アンモニウム( (NH4)6 Mo7O24・4H2O)水溶液を(MoO3/ Al2O3)=40/60の重量比となるように用いた以外は実施例1と同様の手順で、酸化モリブデン被覆アルミナ複合酸化物を調製した。表4に酸化モリブデン被覆前後のアルミナ担体と酸化モリブデン被覆アルミナ複合酸化物の物理性状を示す。
実施例1で用いた9種類のアルミナ担体に対して、15wt%-オキシ硝酸ジルコニウム(ZrO(NO3)2)水溶液の代わりに15wt%-パラタングステン酸アンモニウム(5(NH4)2O・12WO3O24・5H2O)水溶液を(WO3/Al2O3)=40/60の重量比となるように用いた以外は実施例1と同様の手順で、酸化タングステン被覆アルミナ複合酸化物を調製した。表5に酸化タングステン被覆前後のアルミナ担体と酸化タングステン被覆アルミナ複合酸化物の物理性状を示す。
実施例1で用いた9種類のアルミナ担体に対して、15wt%-オキシ硝酸ジルコニウム(ZrO(NO3)2)水溶液の代わりに15wt%-硝酸セリウム(Ce(NO3)3)水溶液を(CeO2/ Al2O3)=40/60の重量比となるように用いた以外は実施例1と同様の手順で、酸化セリウム被覆アルミナ複合酸化物を調製した。表6に酸化セリウム被覆前後のアルミナ担体と酸化セリウム被覆アルミナ複合酸化物の物理性状を示す。
実施例1で用いた9種類のアルミナ担体に対して、15wt%-オキシ硝酸ジルコニウム(ZrO(NO3)2)水溶液と15wt%-硝酸セリウム(Ce(NO3)3)水溶液とを(ZrO2/CeO2/Al2O3)=20/20/60の重量比となるように混合して用いた以外は実施例1と同様の手順で、酸化ジルコニウム-酸化セリウム被覆アルミナ複合酸化物を調製した。表7に酸化ジルコニウム-酸化セリウム被覆前後のアルミナ担体と酸化セリウム被覆アルミナ複合酸化物の物理性状を示す。
実施例7〔酸化ジルコニウム被覆層-酸化セリウム被覆層の2層担持〕
Claims (6)
- 表面積150m2/g以上、細孔容積0.55cm3/g以上、及び平均細孔径100〜300Åであって、細孔径100〜300Åの細孔が全細孔容積の60%以上を占めるγ-アルミナ担体の表面に、3価あるいはそれ以上の原子価を有する金属から選ばれた1種又は2種以上の金属の酸化物からなる被覆層を担持せしめた金属酸化物被覆アルミナ複合酸化物であり、上記γ-アルミナ担体の表面には金属酸化物が30〜45重量%の割合で担持されており、γ-アルミナ担体の表面全面が実質的に被覆層で覆われていることを特徴とする金属酸化物被覆アルミナ複合酸化物。
- 当該金属酸化物が、イットリウム(Y)、ジルコニウム(Zr)、ニオブ(Nb)、モリブデン(Mo)、タングステン(W)、ランタン(La)、セリウム(Ce)、及びユウロピニウム(Eu)から選ばれた1種又は2種以上の金属の酸化物である請求項1に記載の金属酸化物被覆アルミナ複合酸化物。
- 当該γ-アルミナ担体の表面を覆う被覆層が、同時に担持された2種以上の金属の酸化物からなる請求項1又は2に記載の金属酸化物被覆アルミナ複合酸化物。
- 当該γ-アルミナ担体の表面を覆う被覆層が、担持操作を繰り返すことにより多層に担持された2種以上の金属の酸化物である請求項1〜3に記載の金属酸化物被覆アルミナ複合酸化物。
- 当該被覆層を形成する金属酸化物が含浸法によりγ-アルミナ担体の表面に担持される請求項1〜4のいずれかに記載の金属酸化物被覆アルミナ複合酸化物。
- 表面積150m 2 /g以上、細孔容積0.55cm 3 /g以上、及び平均細孔径100〜300Åであって細孔径100〜300Åの細孔が全細孔容積の60%以上を占めるγ-アルミナ担体を3価又はそれ以上の原子価を有する金属から選ばれた1種又は2種以上の金属化合物の金属化合物溶液中に浸漬し、この浸漬時にγ-アルミナ担体の細孔中の気泡を減圧脱気して焼成後の金属酸化物含有量が30〜45重量%の範囲となるようにγ-アルミナ担体に金属化合物溶液を含浸させ、次いで溶剤を除去して400〜800℃で焼成することを特徴とする金属酸化物被覆アルミナ複合酸化物の製造方法。
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