| 发明名称 |
HETEROPOLY ACIDS AND THEIR PRODUCTION AND USE |
| 摘要 |
A heteropoly-acid of the formula: H3+x(PMo12-xVxO40).nH2O wherein x and n are numbers satisfying respectively the equations: 0</=x</=3 and n</=6, and comprising phosphorus as the central atom and molybdenum or molybdenum and vanadium as the coordinating atoms, or its reduction-form product, which is in a cubic crystal structure having diffraction lines at lattice spacings (d) of at least 8.4, 6.8, 5.9, 4.8, 4.2 and 3.4 in the X-ray powder diffraction. The heteropoly-acid is useful as a catalyst, especially as a catalyst in the production of methacrylic acid by the gas-phase catalytic oxidation of methacrolein. |
| 申请公布号 |
DE3261040(D1) |
申请公布日期 |
1984.11.29 |
| 申请号 |
DE19823261040 |
申请日期 |
1982.04.23 |
| 申请人 |
SUMITOMO CHEMICAL COMPANY, LIMITED |
发明人 |
SCHIMIZU, SHINKICHI;ICHIHASHI, HIROSHI;NAGAI, KOICHI |
| 分类号 |
C07C57/05;B01J27/00;B01J27/19;B01J27/199;C01B25/16;C01B25/24;C07C51/00;C07C51/25;C07C67/00;(IPC1-7):C01G39/00;B01J23/28 |
主分类号 |
C07C57/05 |
| 代理机构 |
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