US4615995A
Expired / Lapsed
US
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Zeolite catalysts
Assignee: Asbestos Institute
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Filing: 1984-01-03
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Granted: 1986-10-07
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Expires: 2004-01-03
Abstract
Abstract Improved yield in light olefins and aromatics from methanol conversion on Zn and Mn loaded pentasil zeolite and composite pentasil zeolite-asbestos catalysts, the Zn content thereof ranging from 0.1 to 1.0% wt/wt and the Mn content thereof ranging from 0.2 to 5.0% wt/wt. The light olefins/aromatics ratio in the products varies with the Mn content in the catalyst, the cumulative light olefinic and aromatic production being kept constant at a high value (higher than 80% at 450° C.).
Inventors
- 👤 Raymond Le Van Mao
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 00:05
CPC Classifications
C; C07; C07C; C07C1/00; C07C1/20; B; B01; B01J; B01J29/00; B01J29/04; B01J29/06; B01J29/40; B01J29/405; B01J29/48; C07C2529/00; C07C2529/04; C07C2529/06; C07C2529/40
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
95 words
A pentasil zeolite-asbestos composite catalyst comprising a magnesium, and iron leached asbestos micro-matrix having a crystallized pentasil zeolite within its micro-matrix, said pentasil zeolite having a portion of its internal acid reaction sites replaced with zinc ions and having manganese ions adsorbed on the external surface thereof, said magnesium and iron leached asbestos micro-matrix is doped internally with zinc ions and externally with manganese ions, the amount of zinc ions being from 0.1 to 0.5% w/w of the metal content and the amount of manganese being from 0.2 to 5.0% w/w of the metal content.
Claim 2
Dependent Claim
95 words
A pentasil zeolite-asbestos composite catalyst comprising a magnesium, and iron leached asbestos micro-matrix having a crystallized pentasil zeolite within its micro-matrix, said pentasil zeolite having a portion of its internal acid reaction sites replaced with zinc ions and having manganese ions adsorbed on the external surface thereof, said magnesium and iron leached asbestos micro-matrix is doped internally with zinc ions and externally with manganese ions, the amount of zinc ions being from 0.1 to 0.5% w/w of the metal content and the amount of manganese being from 0.2 to 5.0% w/w of the metal content.
Claim 3
Dependent Claim
27 words
The catalyst of claim 1, wherein the amount of zinc is from 0.1 to 0.6% w/w and the amount of manganese is from 0.2 to 2.5% w/w.
Claim 4
Dependent Claim
21 words
The catalyst of claim 2, wherein the amount of zinc is 0.37% w/w and the amount of manganese is 1.17% w/w.
Claim 5
Dependent Claim
21 words
The catalyst of claim 2, wherein the amount of zinc is 0.23% w/w and the amount of manganese is 1.10% w/w.
Claim 6
Dependent Claim
21 words
The catalyst of claim 2, wherein the amount of zinc is 0.23% w/w and the amount of manganese is 2.08% w/w.
Claim 7
Dependent Claim
21 words
The catalyst of claim 2, wherein the amount of zinc is 0.32% w/w and the amount of manganese is 1.60% w/w.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-10-06 | 1990-04-07 | 1990-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-10-06 | 1994-04-07 | 1994-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-10-06 | 1998-04-07 | 1998-10-07 | $7700.00 | Window Closed / Lapsed |