US3848014A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalytic steam dealkylation
Assignee: Mitsubishi Chemical Corp
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Filing: 1972-12-19
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Granted: 1974-11-12
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Expires: 1992-12-19
Abstract
Abstract 1. A PROCESS FOR CATALYTIC STEAM DEALKYLATION OF ALKYL AROMATIC HYDROCARBON WHICH COMPRISES CAUSING AN ALKYL AROMATIC HYDROCARBON TO CONTACT, IN THE PRESENCE OF STEAM, A CATALYST SUPPORTED BY A CARRIER, SAID CATALYST COMPRISING RHODIUM IN A QUANTITY OF FROM 0.05 TO 5.0 PERCENT BY WEIGHT WITH RESPECT TO THE CARRIER AND AT LEAST ONE OXIDE OF A GROUP IIIB METAL OF THE PERIODIC TABLE IN A QUANTITY OF FROM 0.05 TO 20 PERCENT BY WEIGHT WITH RESPECT TO THE CARRIER.
Inventors
- 👤 M Uchiyama
- 👤 S Mori
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:14
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/38; B01J23/54; B01J23/56; B01J23/64; B01J23/63; B01J23/70; C; C07; C07C; C07C4/00; C07C4/08; C07C4/12; C07C4/14; C07C4/20; C07C2523/00; C07C2523/10; C07C2523/12; C07C2523/16; C07C2523/20; C07C2523/22; C07C2523/24; C07C2523/26; C07C2523/38; C07C2523/40; C07C2523/46; C07C2523/54; C07C2523/56; C07C2523/63; C07C2523/70; C07C2523/72; C07C2523/74; C07C2523/745; C07C2523/755
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
80 words
A PROCESS FOR CATALYTIC STEAM DEALKYLATION OF ALKYL AROMATIC HYDROCARBON WHICH COMPRISES CAUSING AN ALKYL AROMATIC HYDROCARBON TO CONTACT, IN THE PRESENCE OF STEAM, A CATALYST SUPPORTED BY A CARRIER, SAID CATALYST COMPRISING RHODIUM IN A QUANTITY OF FROM 0.05 TO 5.0 PERCENT BY WEIGHT WITH RESPECT TO THE CARRIER AND AT LEAST ONE OXIDE OF A GROUP IIIB METAL OF THE PERIODIC TABLE IN A QUANTITY OF FROM 0.05 TO 20 PERCENT BY WEIGHT WITH RESPECT TO THE CARRIER.
Claim 2
Dependent Claim
80 words
A PROCESS FOR CATALYTIC STEAM DEALKYLATION OF ALKYL AROMATIC HYDROCARBON WHICH COMPRISES CAUSING AN ALKYL AROMATIC HYDROCARBON TO CONTACT, IN THE PRESENCE OF STEAM, A CATALYST SUPPORTED BY A CARRIER, SAID CATALYST COMPRISING RHODIUM IN A QUANTITY OF FROM 0.05 TO 5.0 PERCENT BY WEIGHT WITH RESPECT TO THE CARRIER AND AT LEAST ONE OXIDE OF A GROUP IIIB METAL OF THE PERIODIC TABLE IN A QUANTITY OF FROM 0.05 TO 20 PERCENT BY WEIGHT WITH RESPECT TO THE CARRIER.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-11-11 | 1978-05-13 | 1978-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-11 | 1982-05-13 | 1982-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-11 | 1986-05-13 | 1986-11-12 | $7700.00 | Window Closed / Lapsed |