Guard catalyst and a process for its preparation
US6673741B2 · kind B2 · utility
1Cited by
13References
19Claims
0Family size
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Key dates
| Filing date | Sep 25, 2001 |
| Grant date | Jan 6, 2004 |
| Priority date | — |
| Expiry date | Dec 23, 2021 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J35/647
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A guard catalyst, comprising an alumina support and molybdenum and/or tungsten and nickel and/or cobalt supported on the alumina support, wherein the total ammonia integral adsorption heat of said alumina support does not exceed 25 J/g, the percentage taken up by the ammonia integral adsorption heat of the ammonia differential adsorption heat greater than 100 kJ/mol does not exceed 10% of the total ammonia integral adsorption heat. Compared to the catalysts of the prior art, the guard catalyst has higher catalytic activity, less coke deposit, lower reduction rate of pore volume, better stability of activity, and higher strength.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.