发明名称 |
CATALYST FOR PRODUCTION OF UNSATURATED CARBOXYLIC ACID, PREPARATION THEREOF AND PRODUCTION OF UNSATURATED CARBOXYLIC ACID |
摘要 |
An improved catalyst suitable for use in the production of an unsaturated carboxylic acid by the catalytic vapor phase oxidation of an unsaturated aldehyde is provided. In this catalyst, a heat-resistant inorganic substance, such as alumina, silica-alumina and silicon carbide, having a particle diameter of 3 through 10 mm, an apparent porosity of 35 through 60%, a water absorption of 20 through 50%, an average pore diameter of not less than 40 microns, a specific surface area of not more than 2 m2/g and a bulk specific gravity of 1.5 through 2.0 is used for supporting a composition containing molybdenum, phosphorus, vanadium and the alkali metals. The use of the above-mentioned carrier results in the advantages that the unsaturated carboxylic acid, such as methacrylic acid, can be selectively produced from the unsaturated aldehyde at a high yield and that the mechanical strength of the catalyst is remarkably improved. |
申请公布号 |
DE3068115(D1) |
申请公布日期 |
1984.07.12 |
申请号 |
DE19803068115 |
申请日期 |
1980.09.04 |
申请人 |
UBE INDUSTRIES, LTD. |
发明人 |
UMEMURA, SUMIO;OHDAN, KYOJI;SAKAI, FUMIHIKO;SUZUKI, KENICHI;BANDO, YASUO;HOGAMI, TOSHIHIKO;FUGINAGA, MASATAKA |
分类号 |
C07C51/235;B01J21/04;B01J23/28;B01J27/198;B01J27/199;B01J27/224;B01J35/10;C07B61/00;C07C51/00;C07C51/25;C07C57/055;C07C67/00;(IPC1-7):B01J27/18;C07C57/04 |
主分类号 |
C07C51/235 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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