JP4204327B2 - 反応帯域中で分子酸素を用いてプロペンを不均一系触媒により気相酸化することによりアクリル酸を製造する方法 - Google Patents
反応帯域中で分子酸素を用いてプロペンを不均一系触媒により気相酸化することによりアクリル酸を製造する方法 Download PDFInfo
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- JP4204327B2 JP4204327B2 JP2002581372A JP2002581372A JP4204327B2 JP 4204327 B2 JP4204327 B2 JP 4204327B2 JP 2002581372 A JP2002581372 A JP 2002581372A JP 2002581372 A JP2002581372 A JP 2002581372A JP 4204327 B2 JP4204327 B2 JP 4204327B2
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- Prior art keywords
- propene
- metal oxide
- acrylic acid
- reflection
- composite metal
- Prior art date
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- QQONPFPTGQHPMA-UHFFFAOYSA-N Propene Chemical compound CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 title claims description 95
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 title claims description 34
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 title claims description 34
- 238000006243 chemical reaction Methods 0.000 title claims description 33
- 230000003647 oxidation Effects 0.000 title claims description 28
- 238000007254 oxidation reaction Methods 0.000 title claims description 28
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 title claims description 13
- 229910001882 dioxygen Inorganic materials 0.000 title claims description 12
- 238000004519 manufacturing process Methods 0.000 title claims description 12
- 239000002638 heterogeneous catalyst Substances 0.000 title description 17
- 239000012808 vapor phase Substances 0.000 title description 4
- 239000000463 material Substances 0.000 claims description 60
- 238000000034 method Methods 0.000 claims description 56
- 229910044991 metal oxide Inorganic materials 0.000 claims description 53
- 150000004706 metal oxides Chemical class 0.000 claims description 51
- 239000002131 composite material Substances 0.000 claims description 49
- 239000007789 gas Substances 0.000 claims description 42
- 230000008569 process Effects 0.000 claims description 42
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 claims description 32
- 238000002441 X-ray diffraction Methods 0.000 claims description 18
- 239000001294 propane Substances 0.000 claims description 16
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 13
- 238000010586 diagram Methods 0.000 claims description 13
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- 229910052763 palladium Inorganic materials 0.000 claims description 2
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- QGAVSDVURUSLQK-UHFFFAOYSA-N ammonium heptamolybdate Chemical compound N.N.N.N.N.N.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.[Mo].[Mo].[Mo].[Mo].[Mo].[Mo].[Mo] QGAVSDVURUSLQK-UHFFFAOYSA-N 0.000 description 3
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- URLJKFSTXLNXLG-UHFFFAOYSA-N niobium(5+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[Nb+5].[Nb+5] URLJKFSTXLNXLG-UHFFFAOYSA-N 0.000 description 3
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- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 230000001143 conditioned effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000003795 desorption Methods 0.000 description 1
- 150000001991 dicarboxylic acids Chemical class 0.000 description 1
- 235000013681 dietary sucrose Nutrition 0.000 description 1
- ZBCBWPMODOFKDW-UHFFFAOYSA-N diethanolamine Chemical compound OCCNCCO ZBCBWPMODOFKDW-UHFFFAOYSA-N 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- FBSAITBEAPNWJG-UHFFFAOYSA-N dimethyl phthalate Natural products CC(=O)OC1=CC=CC=C1OC(C)=O FBSAITBEAPNWJG-UHFFFAOYSA-N 0.000 description 1
- 229960001826 dimethylphthalate Drugs 0.000 description 1
- 238000007580 dry-mixing Methods 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 230000007717 exclusion Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 235000019253 formic acid Nutrition 0.000 description 1
- 150000004675 formic acid derivatives Chemical class 0.000 description 1
- 238000001640 fractional crystallisation Methods 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 238000004817 gas chromatography Methods 0.000 description 1
- 238000007429 general method Methods 0.000 description 1
- 239000008103 glucose Substances 0.000 description 1
- 150000004676 glycans Chemical class 0.000 description 1
- 150000004820 halides Chemical class 0.000 description 1
- 238000007210 heterogeneous catalysis Methods 0.000 description 1
- XXMIOPMDWAUFGU-UHFFFAOYSA-N hexane-1,6-diol Chemical compound OCCCCCCO XXMIOPMDWAUFGU-UHFFFAOYSA-N 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 239000003701 inert diluent Substances 0.000 description 1
- 239000001282 iso-butane Substances 0.000 description 1
- 235000013847 iso-butane Nutrition 0.000 description 1
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 1
- 239000008101 lactose Substances 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- HCWCAKKEBCNQJP-UHFFFAOYSA-N magnesium orthosilicate Chemical compound [Mg+2].[Mg+2].[O-][Si]([O-])([O-])[O-] HCWCAKKEBCNQJP-UHFFFAOYSA-N 0.000 description 1
- 229910052919 magnesium silicate Inorganic materials 0.000 description 1
- 239000000391 magnesium silicate Substances 0.000 description 1
- 235000019792 magnesium silicate Nutrition 0.000 description 1
- VZCYOOQTPOCHFL-UPHRSURJSA-N maleic acid Chemical compound OC(=O)\C=C/C(O)=O VZCYOOQTPOCHFL-UPHRSURJSA-N 0.000 description 1
- 239000011976 maleic acid Substances 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 150000007522 mineralic acids Chemical class 0.000 description 1
- 229910003455 mixed metal oxide Inorganic materials 0.000 description 1
- MEFBJEMVZONFCJ-UHFFFAOYSA-N molybdate Chemical compound [O-][Mo]([O-])(=O)=O MEFBJEMVZONFCJ-UHFFFAOYSA-N 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 229910000476 molybdenum oxide Inorganic materials 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
- 150000002772 monosaccharides Chemical class 0.000 description 1
- IJDNQMDRQITEOD-UHFFFAOYSA-N n-butane Chemical compound CCCC IJDNQMDRQITEOD-UHFFFAOYSA-N 0.000 description 1
- ZKATWMILCYLAPD-UHFFFAOYSA-N niobium pentoxide Inorganic materials O=[Nb](=O)O[Nb](=O)=O ZKATWMILCYLAPD-UHFFFAOYSA-N 0.000 description 1
- 150000002823 nitrates Chemical class 0.000 description 1
- 150000002825 nitriles Chemical class 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen(.) Chemical compound [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- 235000005985 organic acids Nutrition 0.000 description 1
- GEVPUGOOGXGPIO-UHFFFAOYSA-N oxalic acid;dihydrate Chemical compound O.O.OC(=O)C(O)=O GEVPUGOOGXGPIO-UHFFFAOYSA-N 0.000 description 1
- PQQKPALAQIIWST-UHFFFAOYSA-N oxomolybdenum Chemical compound [Mo]=O PQQKPALAQIIWST-UHFFFAOYSA-N 0.000 description 1
- 239000011238 particulate composite Substances 0.000 description 1
- 229920000058 polyacrylate Polymers 0.000 description 1
- 229920001282 polysaccharide Polymers 0.000 description 1
- 239000005017 polysaccharide Substances 0.000 description 1
- BDERNNFJNOPAEC-UHFFFAOYSA-N propan-1-ol Chemical compound CCCO BDERNNFJNOPAEC-UHFFFAOYSA-N 0.000 description 1
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 239000008262 pumice Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000011541 reaction mixture Substances 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 150000004760 silicates Chemical class 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- 239000007790 solid phase Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 229960004793 sucrose Drugs 0.000 description 1
- 150000005846 sugar alcohols Polymers 0.000 description 1
- 238000004441 surface measurement Methods 0.000 description 1
- 239000011975 tartaric acid Substances 0.000 description 1
- 235000002906 tartaric acid Nutrition 0.000 description 1
- LAJZODKXOMJMPK-UHFFFAOYSA-N tellurium dioxide Chemical compound O=[Te]=O LAJZODKXOMJMPK-UHFFFAOYSA-N 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- ZCUFMDLYAMJYST-UHFFFAOYSA-N thorium dioxide Chemical compound O=[Th]=O ZCUFMDLYAMJYST-UHFFFAOYSA-N 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 description 1
- LSGOVYNHVSXFFJ-UHFFFAOYSA-N vanadate(3-) Chemical compound [O-][V]([O-])([O-])=O LSGOVYNHVSXFFJ-UHFFFAOYSA-N 0.000 description 1
- 229910001935 vanadium oxide Inorganic materials 0.000 description 1
- JTJFQBNJBPPZRI-UHFFFAOYSA-J vanadium tetrachloride Chemical compound Cl[V](Cl)(Cl)Cl JTJFQBNJBPPZRI-UHFFFAOYSA-J 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
- 229910001928 zirconium oxide Inorganic materials 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C45/00—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds
- C07C45/27—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by oxidation
- C07C45/32—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by oxidation with molecular oxygen
- C07C45/33—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by oxidation with molecular oxygen of CHx-moieties
-
- 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
- B01J23/002—Mixed oxides other than spinels, e.g. perovskite
-
- 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
- B01J23/16—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
- B01J23/24—Chromium, molybdenum or tungsten
- B01J23/28—Molybdenum
-
- 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
- B01J27/00—Catalysts comprising the elements or compounds of halogens, sulfur, selenium, tellurium, phosphorus or nitrogen; Catalysts comprising carbon compounds
- B01J27/02—Sulfur, selenium or tellurium; Compounds thereof
- B01J27/057—Selenium or tellurium; Compounds thereof
- B01J27/0576—Tellurium; Compounds thereof
-
- 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
- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
- B01J37/02—Impregnation, coating or precipitation
- B01J37/0215—Coating
- B01J37/0232—Coating by pulverisation
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C45/00—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds
- C07C45/27—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by oxidation
- C07C45/32—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by oxidation with molecular oxygen
- C07C45/33—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by oxidation with molecular oxygen of CHx-moieties
- C07C45/34—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by oxidation with molecular oxygen of CHx-moieties in unsaturated compounds
- C07C45/35—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by oxidation with molecular oxygen of CHx-moieties in unsaturated compounds in propene or isobutene
Description
Mo1VbMc 1Md 2On (I)
[式中、
M1=Teおよび/またはSb、
M2=Nb、Ta、W、Ti、Al、Zr、Cr、Mn、Ga、Fe、Ru、Co、Rh、Ni、Pd、Pt、La、Bi、B、Ce、Sn、Zn、SiおよびInを含む群からの少なくとも1種の元素、
b=0.01〜1、
c=>0〜1、有利には0.01〜1、
d=>0〜1、有利には0.01〜1および
n=(I)中の酸素とは異なる元素の原子価および頻度により決定される数]の複合金属酸化物材料少なくとも1種を使用して分子酸素を用いてプロペンを不均一系触媒による気相酸化することによりアクリル酸を製造する方法に関する。
− 反射hはX線回折図の中で最も強度大であり、ならびに最大で0.5゜の半値幅を有し、
− 反射iの強度Piおよび反射kの強度Pkは0.65≦R≦0.85の関係を満足し、その際、Rは、式
R=Pi/(Pi+Pk)
により定義される強度の比であり、かつ
− 反射iおよび反射kの半値幅はそれぞれ≦1゜である
ことである。
D=粒子の直径、
x=直径が≧Dである粒子の百分率、および
y=直径が<Dである粒子の百分率
である。
− 反射hはX線回折図の中で最も強度大であり、ならびに最大で0.5゜の半値幅を有し、
− 反射iの強度Piおよび反射kの強度Pkは0.65≦R≦0.85の関係を満足し、その際Rは、式
R=Pi/(Pi+Pk)
により定義される強度の比であり、かつ
− 反射iおよび反射kの半値幅はそれぞれ≦1゜である。
9.0±0.4゜(l)、
6.7±0.4゜(o)および
7.9±0.4゜(p)。
45.2±0.4゜(q)。
36.2±0.4゜および
50.0±0.4゜。
i:5〜95、師橋が5〜80、部分的に10〜60;
l:1〜30;
m:1〜40;
n:1〜40;
o:1〜30;
p:1〜30および
q:5〜60。
プロペン:酸素:H2O:その他の希釈ガス
=1:(0.1〜10):(0〜70):(0〜20)。
A)触媒の製造
a)本発明による
1.温度80℃を有する水6000ml中に撹拌下でMoO3含有率81.53質量%を有するヘプタモリブデン酸アンモニウム水和物(理想組成:(NH4)6Mo7O24、Starck社)706.2gを溶解した。80℃を維持しながら得られる清澄な無色の溶液をさらに攪拌しながら順次、まずメタバナジン酸アンモニウム(V2O5含有率77.4質量%、理想組成:NH4VO3、G. f. E. Nuernberg)141.0gおよび引き続きテルル酸(H6TeO6 99質量%、Fluka社)211.28gを添加した。その際、溶液Aが得られた。溶液Aを30℃に冷却した。30℃に冷却した清澄な、かつ赤色に着色した溶液Aをさらに攪拌し、かつ30℃を維持しながら、シュウ酸ニオブ(H. C. Starck社、ドイツ、Goslar、Nb含有率=20.1質量%)221.28gおよび30℃を有する水2000mlからなるシュウ酸ニオブ水溶液を添加した。
a)に記載したように固体a)を製造した。得られた固体a)85gをa)においてと同様に粉砕した。ただし水150mlの代わりに7.5質量%の水性HNO3 150mlを使用した。ZrO2粉砕ビーズをふるいにより分離した後、得られた懸濁液の固体割合を濾過により分離し(ペーパーフィルター)、水で硝酸塩不含になるまで洗浄し、かつ引き続き120℃で一夜、循環流乾燥室中で乾燥させた。得られた粉末の化学的組成(粒径0.12mm以下)はMo1V0.15Te0.088Nb0.16Oxであった。属するX線回折図を図3が示す(R=0.74)。該図によればi相のみを有していた。得られた粉末75gを用いてa)においてと同様に本発明により使用されるシェル型触媒Sbを製造した。
メタバナジン酸アンモニウム(V2O5含有率77.4質量%、理想組成:NH4VO3、G. f. E. Nuernberg社)1287.25gを特殊鋼容器中、80℃で水44.6l中に溶解した。清澄で黄色みを帯びた溶液が生じ、該溶液を60℃に冷却した。次いでこの溶液に順次、60℃を維持しながらテルル酸(99質量%H6TeO6、Fluka社)1683.75gおよびMoO3含有率81.53質量%を有するヘプタモリブデン酸アンモニウム水和物(理想組成:(NH4)6Mo7O24・4H2O、Starck社)5868.0gを撹拌下で添加した。深赤色の溶液Aが生じ、該溶液を30℃に冷却した。第二の特殊鋼容器中にこれとは別にシュウ酸ニオブアンモニウム(Nb21.1質量%、Starck社/Goslar)1599.0gを60℃で水8.3l中に溶解した。溶液Bが得られ、該溶液を30℃に冷却した。溶液AおよびBを30℃で合し、その際溶液Bを溶液A中に攪拌しながら導入した。添加は3分間の時間にわたって行った。橙赤色の懸濁液が生じた。この懸濁液を引き続き噴霧乾燥させた(Nipolosa社の噴霧塔;受け器の温度を30℃に維持した。T入口=240℃、T出口=110℃;乾燥時間:1.5時間)。得られる噴霧粉末は同様に橙色であった。粉末質量の2%の微粒子状のグラファイト(Timcal社、スイス)を添加混合した後、該粉末を寸法16mm×8mm×2.5mm(外径×内径×高さ)のリングにタブレット化し、得られた側方圧縮強度は11Nであった)。このリング100gを図1に記載の回転球形炉中でか焼した。このためにまず35分以内に25℃から50Nl/hの空気流中で275℃まで直線的に加熱し、かつこの温度を1時間、空気流を維持しながら維持した。引き続き空気流を50Nl/hの窒素流により交換し、かつ25分以内に直線的に275℃から600℃まで加熱した。この温度および窒素流を2時間維持した。最終的に窒素流を維持しながら放置して25℃まで冷却させた。か焼した材料を引き続きレッチュ(Retsch)ミル(遠心分離ミル、ZM100型、Retsch社、ドイツ)中で粉砕した(粒径0.12mm以下)。化学組成Mo1.0V0.33Te0.15Nb0.11Oxを有する黒色の粉末が得られた。属するX線回折図を図4が示す(R=0.35)。これはi相およびk相からなる混合物を有していた。i相の割合は65質量%であった。粉末75gを用いてa)においてと同様に比較シェル型触媒Scを製造した。
メタバナジン酸アンモニウム(V2O5含有率77.4質量%、理想組成:NH4VO3、G. f. E. Nuernberg社)128.0gを特殊鋼容器中、80℃で水2925ml中に溶解した。清澄で黄色みを帯びた溶液が生じ、該溶液を60℃に冷却した。次いでこの溶液に順次、60℃を維持しながらテルル酸(99質量%H6TeO6、Fluka社)304.5gおよびヘプタモリブデン酸アンモニウム水和物(MoO3含有率81.53質量%、Starck社、理想組成:(NH4)6Mo7O24・4H2O)585.0gを撹拌下で添加した。深赤色の溶液Aが生じ、該溶液を30℃に冷却した。第二の特殊鋼容器中にここから分離したニオブ酸(Nb含有率48.6質量%、Starck社)69.6gをシュウ酸二水和物343.5gと一緒に60℃で水750ml中に溶解した。溶液Bが得られ、該溶液を30℃に冷却した。溶液AおよびBを30℃で合し、その際溶液Bを溶液A中に攪拌しながら導入した。添加は3分間の時間にわたって行った。橙赤色の懸濁液が生じた。この懸濁液を引き続き噴霧乾燥させた(Nipolosa社の噴霧塔;受け器の温度を30℃に維持した。T入口=330℃、T出口=110℃;乾燥時間:2時間)。得られる噴霧粉末はオリーブグリーン色の均一な粉末であった。
A)からのシェル型触媒をV2Aスチール(外径=21mm、内径=15mm)からなるそのつど1つの反応管(長さ:120cm)に装入した。装入物の長さは70cmを選択した。ステアタイト球(直径2.2〜3.2mm、Ceramtec社)からなる長さ30cmの前堆積物(これは省略することもできる)を反応ガス出発混合物の加熱に使用した。同じステアタイト球を用いて反応管を触媒帯域の後に最終的に充填した(これもまた省略することができる)。反応管をその全長さにわたって循環する、温度370℃の塩浴により温度調節した。反応ガス出発混合物としてプロペン5体積%、酸素9.5体積%および窒素85.5体積%からなる混合物を使用した。反応ガス出発混合物による反応管の負荷はすべての場合において100Nl/hであった。生成物ガス流中でガスクロマトグラフィーによる分析によって反応管を1回通過した際のアクリル酸形成の選択率Sを確認した。以下の第1表は異なったシェル型触媒により達成されたプロペンの反応率(U)ならびにアクリル酸形成の選択率Sを示す。
Claims (10)
- 反応帯域A中に存在する一般化学量論I
MolVbMc 1Md 2On (I)
[式中、
M1=Teおよび/またはSb、
M2=Nb、Ta、W、Ti、Al、Zr、Cr、Mn、Ga、Fe、Ru、Co、Rh、Ni、Pd、Pt、La、Bi、B、Ce、Sn、Zn、SiおよびInを含む群からの少なくとも1種の元素、
b=0.01〜1、
c=>0〜1、
d=>0〜1および
n=(I)中の酸素とは異なる元素の原子価および頻度により決定される数]の複合金属酸化物活性材料少なくとも1種を使用して分子酸素を用いて不均一系触媒による気相酸化によりプロペンからアクリル酸を製造する方法において、
少なくとも1種の複合金属酸化物材料(I)のX線回折図は、そのピークが回折角(2θ)22.2±0.4゜(h)、27.3±0.4゜(i)および28.2±0.4゜(k)である反射h、iおよびkを有し、
− 反射hはX線回折図中で最も強度大であり、かつ最大で0.5゜の半値幅を有し、
− 反射iの強度Piおよび反射kの強度Pkは0.65≦R≦0.85の関係を満足し、その際、Rは式
R=Pi/(Pi+Pk)
により定義される強度比であり、かつ
− 反射iおよび反射kの半値幅はそれぞれ≦1゜である
ことを特徴とする、複合金属酸化物材料少なくとも1種を使用して分子酸素を用いて不均一系触媒による気相酸化によりプロペンからアクリル酸を製造する方法。 - 0.67≦R≦0.75である、請求項1記載の方法。
- R=0.70〜0.75である、請求項1記載の方法。
- M1=Teである、請求項1から3までのいずれか1項記載の方法。
- M2=Nbである、請求項1から4までのいずれか1項記載の方法。
- b=0.1〜0.6である、請求項1から5までのいずれか1項記載の方法。
- c=0.05〜0.4である、請求項1から6までのいずれか1項記載の方法。
- d=0.1〜0.6である、請求項1から7までのいずれか1項記載の方法。
- X線回折図がピーク位置2θ=50.0±0.3゜を有する反射を有していない、請求項1から8までのいずれか1項記載の方法。
- プロペンをプロパンの存在下で酸化する、請求項1から9までのいずれか1項記載の方法。
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DE10118814A DE10118814A1 (de) | 2001-04-17 | 2001-04-17 | Verfahren zur Herstellung von Acrylsäure durch heterogen katalysierte Gasphasenoxidation von Propen mit molekularem Sauerstoff in einer Reaktionszone |
PCT/EP2002/004073 WO2002083615A1 (de) | 2001-04-17 | 2002-04-12 | Verfahren zur herstellung von acrylsäure durch heterogen katalysierte gasphasenoxidation von propen mit molekularem sauerstoff in einer reaktionszone |
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