Organic compounds -- part of the class 532-570 series – Organic compounds – Carboxylic acids and salts thereof
Reexamination Certificate
2006-02-28
2006-02-28
Richter, Johann (Department: 1621)
Organic compounds -- part of the class 532-570 series
Organic compounds
Carboxylic acids and salts thereof
C562S538000, C562S545000, C568S431000
Reexamination Certificate
active
07005542
ABSTRACT:
The present invention provides: a production process for a catalyst for synthesis of an unsaturated aldehyde and/or an unsaturated carboxylic acid, which production process is suitable for producing the catalyst with good reproducibility, wherein the catalyst is excellent in activity, selectivity, and physical strength; this catalyst; and a production process for the unsaturated aldehyde and/or the unsaturated carboxylic acid by using this catalyst. The production process for the catalyst comprises the steps of: carrying out heat treatment of an aqueous solution or slurry of a starting material to thus prepare a catalyst precursor P1, wherein the starting material includes molybdenum, bismuth, and iron as essential components; thereafter adding and mixing a binder into the P1to thus prepare a catalyst precursor P2; and molding and then calcining the P2, thereby producing the catalyst for synthesis of the unsaturated aldehyde and/or the unsaturated carboxylic acid; with the production process being characterized by involving an ignition loss ratio of the catalyst precursor P1in the range of 10 to 40 mass % (excluding 40 mass %).
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Nippon Shokubai Co. , Ltd.
Puttlitz Karl
Richter Johann
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