Patent US4732881A successfully refreshed from Google Patents.
US4732881A
Expired / Lapsed
US
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Catalysts for up-grading steam-cracking products
Assignee: Asbestos Institute
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Filing: 1986-09-25
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Granted: 1988-03-22
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Expires: 2006-09-25
Abstract
Abstract There is provided with the present invention a new process for up-grading products resulting from the steam-cracking of hydrocarbons which comprises bringing the steam-cracking reaction products in contact with a catalyst comprising a mixture of from 2.5 to 7.5% wt of Cr 2 O 3 , 5 to 17.5% wt of Al 2 O 3 and 75 to 85% wt of a Zn-ZSM-5 zeolite or a Zn-ZSM-5 zeolite/asbestos and recovering the desired products.
Inventors
- 👤 Raymond Le Van Mao
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:57
CPC Classifications
C; C10; C10G; C10G63/00; C10G63/02; C10G63/04; B; B01; B01J; B01J29/00; B01J29/04; B01J29/06; B01J29/40; B01J29/405; B01J29/48; C07; C07C; C07C2/00; C10G35/00; C10G35/04; C10G35/06; C10G35/095; C10G55/00; C10G55/02; C10G55/04; C07C2521/00; C07C2521/02; C07C2521/04; C07C2523/00; C07C2523/16; C07C2523/24; C07C2523/26; C07C2529/00; C07C2529/04; C07C2529/06; C07C2529/40; C07C2529/48
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
47 words
A catalyst suitable for up-grading products resulting from the steam-cracking of hydrocarbons, said catalyst comprising 2.5 to 7.5% wt of Cr 2 O 3 , 5 to 17.5% wt of Al 2 O 3 and 75 to 85% wt of a Zn-ZSM-5 zeolite or a Zn-ZSM-5 zeolite/asbestos.
Claim 2
Dependent Claim
47 words
A catalyst suitable for up-grading products resulting from the steam-cracking of hydrocarbons, said catalyst comprising 2.5 to 7.5% wt of Cr 2 O 3 , 5 to 17.5% wt of Al 2 O 3 and 75 to 85% wt of a Zn-ZSM-5 zeolite or a Zn-ZSM-5 zeolite/asbestos.
Claim 3
Dependent Claim
26 words
The catalyst of claim 1, wherein CR 2 O 3 and Al 2 O 3 are mechanically mixed with the Zn-ZSM-5 zeolite or the Zn-ZSM-5 zeolite/asbestos.
Claim 4
Dependent Claim
26 words
The catalyst of claim 1, wherein CR 2 O 3 and Al 2 O 3 are directly deposited on the Zn-ZSM-5 zeolite or the Zn-ZSM-5 zeolite/asbestos.
Claim 5
Dependent Claim
40 words
A catalyst according to claim 1 consisting of 2.5 to 7.5% wt. of Cr 2 O 3 , 5 to 17.5% st. of Al 2 O 3 and 75 to 85% wt. of an Zn-ZSM-5 zeolite or Zn-ZSM-5 zeolite asbestos.
Claim 6
Dependent Claim
27 words
The catalyst according to claim 4 wherein CR 2 O 3 and Al 2 O 3 are mechanically mixed with the Zn-ZSM-5 zeolite or the Zn-ZSM-5 zeolite/asbestos.
Claim 7
Dependent Claim
27 words
The catalyst according to claim 4 wherein CR 2 O 3 and Al 2 O 3 are directly deposited on the Zn-ZSM-5 zeolite or the Zn-ZSM-5 zeolite/asbestos.
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) | 1991-03-22 | 1991-09-21 | 1992-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-03-22 | 1995-09-21 | 1996-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-03-22 | 1999-09-21 | 2000-03-22 | $7700.00 | Window Closed / Lapsed |