US3284522A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cyclohexane production
Assignee: Air Products and Chemicals Inc
•
Filing: 1964-04-20
•
Granted: 1966-11-08
•
Expires: 1984-04-20
Abstract
No abstract record available.
Inventors
- 👤 Alexander K Logwinuk
- 👤 Josef W Schall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:03
CPC Classifications
C; C07; C07C; C07C13/00; C07C13/02; C07C13/16; C07C13/18; C07C4/00; C07C4/08; C07C4/12; C07C4/14; C07C4/18; C07C5/00; C07C5/02; C07C5/10; C07C2521/00; C07C2521/02; C07C2521/04; C07C2523/00; C07C2523/02; C07C2523/04; C07C2523/16; C07C2523/24; C07C2523/26; C07C2601/00; C07C2601/12; C07C2601/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
141 words
THE METHOD FOR THE CONVERSION OF ALKYLATED BENZENES TO CYCLOHEXANE WHICH COMPRISES: (A) CONTACTING AN ALKYLATED BENZENE-HYDROGEN ADMIXTURE WITH CHROME-ALUMINA CATALYST IN AT LEAST ONE FIRST REACTOR AT 700 TO 1000 P.S.I.G. AND 1050 TO 1250* F.; (B) COOLING THE EFFLUENT FROM THE FIRST REACTOR TO A TEMPERATURE OF 250 TO 650*F.; (C) CONTACTING THE COOLED EFFLUENT FROM THE FIRST REACTOR WITH A HYDROGENATION CATALYST IN AT LEAST ONE SECOND REACTOR AT A PRESSURE SUBSTANTIALLY EQUIVALENT TO THAT OF THE FIRST REACTOR THEREBY FORMING CYCLOHEXANE AND METHYL CYCLOHEXANE; (D) SEPARATING METHYLCYCLOHEXANE FROM THE SECON REACTOR EFFLUENT; (E) CONTACTING THE METHYLCYCLOHEXANE WITH A DEHYDROGENATION CATALYST IN A THIRD REACTOOR AT 200 TO 500 P.S.I.G. AND 700 TO 1000* F. (F) RECYCLING THE REACTOR EFFLUENT OBTAINED IN THE THIRD REACTOR TO TE FIRST REACTOR; AND (G) RECOVERING CYCLOHEXANE FROM THE SECOND REACTOR EFFLUENT.
Claim 2
Independent Claim
141 words
THE METHOD FOR THE CONVERSION OF ALKYLATED BENZENES TO CYCLOHEXANE WHICH COMPRISES: (A) CONTACTING AN ALKYLATED BENZENE-HYDROGEN ADMIXTURE WITH CHROME-ALUMINA CATALYST IN AT LEAST ONE FIRST REACTOR AT 700 TO 1000 P.S.I.G. AND 1050 TO 1250* F.; (B) COOLING THE EFFLUENT FROM THE FIRST REACTOR TO A TEMPERATURE OF 250 TO 650*F.; (C) CONTACTING THE COOLED EFFLUENT FROM THE FIRST REACTOR WITH A HYDROGENATION CATALYST IN AT LEAST ONE SECOND REACTOR AT A PRESSURE SUBSTANTIALLY EQUIVALENT TO THAT OF THE FIRST REACTOR THEREBY FORMING CYCLOHEXANE AND METHYL CYCLOHEXANE; (D) SEPARATING METHYLCYCLOHEXANE FROM THE SECON REACTOR EFFLUENT; (E) CONTACTING THE METHYLCYCLOHEXANE WITH A DEHYDROGENATION CATALYST IN A THIRD REACTOOR AT 200 TO 500 P.S.I.G. AND 700 TO 1000* F. (F) RECYCLING THE REACTOR EFFLUENT OBTAINED IN THE THIRD REACTOR TO TE FIRST REACTOR; AND (G) RECOVERING CYCLOHEXANE FROM THE SECOND REACTOR EFFLUENT.
References Cited (Backward Citations)
US2898387A
Cited
US2934573A
Cited
US2951886A
Cited
US3213150A
Cited
US3213151A
Cited
US3178486A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-11-07 | 1970-05-09 | 1970-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-07 | 1974-05-09 | 1974-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-07 | 1978-05-09 | 1978-11-08 | $7700.00 | Window Closed / Lapsed |