Oxidative revivification of molecular sieve catalysts admixed with refractory particles
US3988260A · kind A · utility
2Cited by
4References
4Claims
0Family size
Assignee
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Key dates
| Filing date | May 9, 1975 |
| Grant date | Oct 26, 1976 |
| Priority date | — |
| Expiry date | May 9, 1995 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J29/90
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Molecular sieve catalyst compositions having decreased catalytic activity as a result of accumulating more than 2 weight-% carbonaceous coke deposits are restored essentially to their pre-coked activity by heating an essentially homogeneous mixture of particles thereof with particles of an inert refractory material in the weight ratio of from 1:2 to 1:10 in air at a temperature of from 500.degree. C. to 725.degree. C. for a period of time sufficient to decrease the carbonaceous coke to less than two weight percent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.