US2580284A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of secondary aromatic amines
Assignee: Shell Development Co
•
Filing: 1949-04-11
•
Granted: 1951-12-25
•
Expires: 1969-04-11
Abstract
No abstract record available.
Inventors
- 👤 Thomas J Deahl
- 👤 Fred H Stross
- 👤 Marion D Taylor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:31
CPC Classifications
C; C07; C07C; C07C209/00; C07C209/04; C07C209/14; C07C209/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
126 words
A PROCESS FOR PRODUCING A SECONDARY AMINE WHICH COMPRISES REACTING AN ALCOHOL OF THE GROUP CONSISTING OF ALKANOLS AND ALKENOLS HAVING NOT MORE THAN 4 CARBON ATOMS WITH A MONO NH2-SUBSTITUTED AROMATIC HYDRCARBON SAID ALCOHOL BEING PRESENT IN AMOUNT BETWEEN 1 AND 4 TIMES THE STOICHIOMETRIC AMOUNT TO PRODUCE THE SECONDARY AMINE, SAID REACTION BEING CARRIED OUT AT A TEMPERATURE BETWEEN 200* C. AND 350* C. AND A PRESSURE BETWEEN ABOUT ATMOSPHERIC PRESSURE AND 100 POUNDS PER SQUARE INCH IN THE PRESENCE OF A SOLID CATALYST CONSISTING ESSENTIALLY OF ABOUT 2% TO ABOUT 20% COPPER, AN ADSORPTIVE ALUMINA, AND ABOUT 0.2 TO 4 MOLS PER MOL OF COPPER, OF AN OXIDE OF A METAL OF THE GROUP CONSISTING OF CA, ZN, CR, MG, FE, AND MN.
Claim 2
Dependent Claim
126 words
A PROCESS FOR PRODUCING A SECONDARY AMINE WHICH COMPRISES REACTING AN ALCOHOL OF THE GROUP CONSISTING OF ALKANOLS AND ALKENOLS HAVING NOT MORE THAN 4 CARBON ATOMS WITH A MONO NH2-SUBSTITUTED AROMATIC HYDRCARBON SAID ALCOHOL BEING PRESENT IN AMOUNT BETWEEN 1 AND 4 TIMES THE STOICHIOMETRIC AMOUNT TO PRODUCE THE SECONDARY AMINE, SAID REACTION BEING CARRIED OUT AT A TEMPERATURE BETWEEN 200* C. AND 350* C. AND A PRESSURE BETWEEN ABOUT ATMOSPHERIC PRESSURE AND 100 POUNDS PER SQUARE INCH IN THE PRESENCE OF A SOLID CATALYST CONSISTING ESSENTIALLY OF ABOUT 2% TO ABOUT 20% COPPER, AN ADSORPTIVE ALUMINA, AND ABOUT 0.2 TO 4 MOLS PER MOL OF COPPER, OF AN OXIDE OF A METAL OF THE GROUP CONSISTING OF CA, ZN, CR, MG, FE, AND MN.
References Cited (Backward Citations)
GB124219A
Cited
US1449423A
Cited
GB275377A
Cited
GB334579A
Cited
GB553448A
Cited
US2444509A
Cited
US2394515A
Cited
US2515872A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-12-24 | 1955-06-25 | 1955-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-12-24 | 1959-06-25 | 1959-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-12-24 | 1963-06-25 | 1963-12-25 | $7700.00 | Window Closed / Lapsed |