Selective toluene disproportionation process (STDP) with ex situ selectivated zeolite catalyst
US5367099A · kind A · utility
49Cited by
29References
34Claims
0Family size
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Key dates
| Filing date | May 28, 1993 |
| Grant date | Nov 22, 1994 |
| Priority date | — |
| Expiry date | May 28, 2013 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P20/52
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A process for shape selective hydrocarbon conversion that involves contacting a hydrocarbon feedsteam, including toluene, under conversion conditions with a catalytic molecular sieve which has been modified by being ex situ selectivated with a silicon compound. The ex situ selectivation involves exposing the molecular sieve to at least two silicon impregnation sequences, each sequence comprising an impregnation with a silicon compound followed by calcination. The modified catalyst used in the process may also be steamed. Optionally, the modified catalyst may be trim-selectivated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.