| 发明名称 |
HYDROGENATION CATALYSTS, PROCESS OF THEIR PREPARATION AND USE |
| 摘要 |
<p>Hydrogenation catalysts comprising metallic palladium supported on activated carbon, wherein less than 50% by weight of the palladium is comprised within a surface layer with a depth of up to 50 microns, the remainder being comprised in a layer between 50 and 400 microns deep. The catalysts can be used in particular in purifying terephthalic acid obtained by oxidation of p-xylene. They are prepared by dry impregnation of the support.</p> |
| 申请公布号 |
CZ9800979(A3) |
申请公布日期 |
1998.12.16 |
| 申请号 |
CZ19980000979 |
申请日期 |
1998.03.31 |
| 申请人 |
SUD CHEMIE MT S. R. L. |
发明人 |
MALENTACCHI MIRINELLA;CAVALLI LUIGI;RUBINI CARLO |
| 分类号 |
B01J23/44;B01J21/00;B01J21/18;B01J23/00;B01J23/46;B01J23/89;B01J35/00;B01J35/10;B01J37/02;B01J37/025;C01B31/08;C02F1/00;C02F1/58;C02F1/72;C07B61/00;C07C51/42;C07C51/487;C07C63/26;(IPC1-7):B01J23/44 |
主分类号 |
B01J23/44 |
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