US3291832A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing 3, 4 dichloroaniline
Assignee: EIDP Inc
•
Filing: 1964-04-09
•
Granted: 1966-12-13
•
Expires: 1984-04-09
Abstract
No abstract record available.
Inventors
- 👤 Kosak John Richard
- 👤 Meece William Ervin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:00
CPC Classifications
C; C07; C07C; C07C211/00; C07C211/43; C07C211/44; C07C211/52; C07C209/00; C07C209/30; C07C209/32; C07C209/36; C07C209/365
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
78 words
IN THE PROCESS FOR PRODUCING 3,4-DICHLOROANILINE BY THE HYDROGENATION OF 3,4-DICHLORO-1-NITROBENZENE AT TEMPERATURES OF FROM 30*C. TO 150*C. AND HYDROGEN GAS PRESSURES OF AT LEAST 100 P.S.I.G. IN THE PRESENCE OF PLATINUM AS A CATALYST AND MORPHOLINE AS DECHLORINATION INHIBITOR, THE IMPROVEMENT CONSISTING OF COMPLETING THE REDUCTION, AFTER ESSENTIALLY ALL OF THE 3,4-DICHLORO-1-NITROBENZENE HAS BEEN HYDROGENATED, AT A TEMPERATURE IN THE RANGE OF FROM ABOUT 170*C. TO ABOUT 180*C. TO REDUCE THE 3,3'',4,4''TETRACHLOROHYDRAZOBENZENE IMPURITY IN THE 3,4-DICHLOROANILINE PRODUCT.
Claim 2
Dependent Claim
78 words
IN THE PROCESS FOR PRODUCING 3,4-DICHLOROANILINE BY THE HYDROGENATION OF 3,4-DICHLORO-1-NITROBENZENE AT TEMPERATURES OF FROM 30*C. TO 150*C. AND HYDROGEN GAS PRESSURES OF AT LEAST 100 P.S.I.G. IN THE PRESENCE OF PLATINUM AS A CATALYST AND MORPHOLINE AS DECHLORINATION INHIBITOR, THE IMPROVEMENT CONSISTING OF COMPLETING THE REDUCTION, AFTER ESSENTIALLY ALL OF THE 3,4-DICHLORO-1-NITROBENZENE HAS BEEN HYDROGENATED, AT A TEMPERATURE IN THE RANGE OF FROM ABOUT 170*C. TO ABOUT 180*C. TO REDUCE THE 3,3'',4,4''TETRACHLOROHYDRAZOBENZENE IMPURITY IN THE 3,4-DICHLOROANILINE PRODUCT.
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) | 1969-12-12 | 1970-06-13 | 1970-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-12 | 1974-06-13 | 1974-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-12 | 1978-06-13 | 1978-12-13 | $7700.00 | Window Closed / Lapsed |