A catalyst for production of acrylic acid which catalyst is so high in activity as to give a still higher selectivity of acrylic acid or a long-catalytic-life-time catalyst for production of acrylic acid which catalyst is so high in activity as to be able to give a high acrylic acid yield while supp
A catalyst for production of acrylic acid which catalyst is so high in activity as to give a still higher selectivity of acrylic acid or a long-catalytic-life-time catalyst for production of acrylic acid which catalyst is so high in activity as to be able to give a high acrylic acid yield while suppressing the temperature rise of the oxidation reaction to a low one; and processes for production of acrylic acid using these catalysts. The catalyst includes an oxide and/or a composite oxide as an essential catalytic component, wherein the oxide and/or the composite oxide has a metal element composition shown by general formula (1): description="In-line Formulae" end="lead"MoaVbWcCudOx (1)description="In-line Formulae" end="tail" (wherein: when a=12, then 1≦b≦14, 0≦c≦12, 0 ≦d≦10, and 0 with any of the vanadium, tungsten, and copper being maldistributed in the surface side or core side of the catalyst.
대표청구항▼
What is claimed is: 1. A fixed-bed reactor catalyst for preparing acrylic acid, wherein the fixed-bed reactor catalyst is an eggshell type catalyst comprising: a) a support and a catalytic component supported on an outer support surface of the support; b) wherein said catalytic component includes a
What is claimed is: 1. A fixed-bed reactor catalyst for preparing acrylic acid, wherein the fixed-bed reactor catalyst is an eggshell type catalyst comprising: a) a support and a catalytic component supported on an outer support surface of the support; b) wherein said catalytic component includes a support surface side, an outer surface side, and a catalytic outer surface, wherein said catalytic outer surface is on said outer surface side; c) wherein said catalytic component comprises an oxide represented by the formula (1): description="In-line Formulae" end="lead"MoaVbWcCudOx (1)description="In-line Formulae" end="tail" (wherein: Mo is molybdenum; V is vanadium; W is tungsten; Cu is copper; and O is oxygen; and a, b, c, d, and x denote atomic ratios of Mo, V, W, Cu, and O respectively; when a=12, then 1≦b≦14, 0≦c≦12, 0≦d≦10, and 0aVbWcCudOx (1)description="In-line Formulae" end="tail" (wherein: Mo is molybdenum; V is vanadium; W is tungsten; Cu is copper; and O is oxygen; and a, b, c, d, and x denote atomic ratios of Mo, V. W, Cu, and O respectively; when a=12, then 1≦b≦14, 0≦c≦12, 0≦d≦10, and 0aVbWcCudOx (1)description="In-line Formulae" end="tail" (wherein: Mo is molybdenum; V is vanadium; W is tungsten; Cu is copper; and O is oxygen; and a, b, c, d, and x denote atomic ratios of Mo, V, W, Cu, and O respectively; when a=12, then 1≦b≦14, 0≦c≦12, 0≦d≦10, and 0aVbWcCudOx (1)description="In-line Formulae" end="tail" (wherein: Mo is molybdenum; V is vanadium; W is tungsten; Cu is copper; and O is oxygen; and a, b, c, d, and x denote atomic ratios of Mo, V, W, Cu, and O respectively; when a=12, then 1≦b≦14, 0≦c≦12, 0≦d≦10, and 02, 3 and 4 and molecular oxygen. 6. The fixed-bed reactor catalyst for preparing acrylic acid according to claim 1, wherein the outer surface side maldistribution ratio (Ma (%)) of said tungsten is not less than 55%. 7. The fixed-bed reactor catalyst for preparing acrylic acid according to claim 1, wherein the outer surface side maldistribution ratio (Ma (%)) of said tungsten is not less than 60%. 8. The fixed-bed reactor catalyst for preparing acrylic acid according to claim 1, wherein the support surface side maldistribution ratio (Mc (%)) of said copper is not less than 55%. 9. The fixed-bed reactor catalyst for preparing acrylic acid according to claim 1, wherein the support surface side maldistribution ratio (Mc (%)) of said copper is not less than 60%. 10. The fixed-bed reactor catalyst for preparing acrylic acid according to claim 2, wherein the outer surface side maldistribution ratio (Ma (%)) of said vanadium is not less than 55%. 11. The fixed-bed reactor catalyst for preparing acrylic acid according to claim 2, wherein the outer surface side maldistribution ratio (Ma (%)) of said vanadium is not less than 60%. 12. The fixed-bed reactor catalyst for preparing acrylic acid according to claim 3, wherein the outer surface side maldistribution ratio (Ma (%)) of said copper is not less than 55%. 13. The fixed-bed reactor catalyst for preparing acrylic acid according to claim 3, wherein the outer surface side maldistribution ratio (Ma (%)) of said copper is not less than 60%. 14. The fixed-bed reactor catalyst for preparing acrylic acid according to claim 3, wherein the support surface side maldistribution ratio (Mc (%)) of said tungsten is not less than 55%. 15. The fixed-bed reactor catalyst for preparing acrylic acid according to claim 3, wherein the support surface side maldistribution ratio (Mc (%)) of said tungsten is not less than 60%. 16. The fixed-bed reactor catalyst for preparing acrylic acid according to claim 4, wherein the support surface side maldistribution ratio (Mc (%)) of said vanadium is not less than 55%. 17. The fixed-bed reactor catalyst for preparing acrylic acid according to claim 4, wherein the support surface side maldistribution ratio (Mc (%)) of said vanadium is not less than 60%. 18. The fixed-bed reactor catalyst for preparing acrylic acid according to any one of claims 1, 2, 3 and 4, wherein the thickness of the catalytic component supported on the outer support surface of the support is not less than 30 μm. 19. The fixed-bed reactor catalyst for preparing acrylic acid according to any one of claims 1, 2, 3 and 4, wherein said catalytic component is supported on the outer support surface of the support and not inside of the support.
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이 특허에 인용된 특허 (10)
Tenten Andreas,DEX ; Weidlich Peter,DEX ; Linden Gerd,DEX, Catalyst consisting of a hollow cylindrical carrier having a catalytically active oxide material applied to the outer su.
Sugi Hideki,JPX ; Sakai Fumio,JPX ; Wada Koichi,JPX ; Shiraishi Kazuo,JPX ; Kojima Toshitake,JPX ; Umejima Atsushi,JPX ; Seo Yoshimasa,JPX, Catalysts and process for the preparation thereof.
Tenten Andreas (Maikammer DEX) Weidlich Peter (Mannheim DEX) Linden Gerd (Heidelberg DEX), Preparation of a catalyst consisting of a carrier and a catalytically active oxide material applied to the surface of th.
Karpov, Andrey; Horstmann, Catharina; Dobner, Cornelia Katharina; Macht, Josef; Rosowski, Frank; Mueller-Engel, Klaus Joachim, Eggshell catalyst consisting of a hollow cylindrical support body and a catalytically active oxide material applied to the outer surface of the support body.
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