US2977364A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparing tmethylenediamine
Assignee: —
•
Filing: —
•
Granted: 1961-03-28
•
Expires: 1978-03-28
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:06
CPC Classifications
C; C07; C07D; C07D487/00; C07D487/02; C07D487/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
160 words
THE METHOD OF PREPARING TRIETHYLENEDIAMINE WHICH INCLUDES THE STEPS OF: PREPARING A GASEOUS MIXTURE CONSISTING PREDOMINANTLY OF (HOCH2CH2)NH(3-N)N WHEREIN N IS AN INTEGER LESS THAN 4 AND AMMONIA, THE MOLAR RATIO OF AMMONIA TO AMINE BEING WITHIN THE RANGE FROM 3 TO 1 TO 12 TO 1, PASSING SAID MIXTURE AT A SPACE VELOCITY OF FROM 0.1 TO 2 VOLUMES OF LIQUID AMINE PER VOLUME OF CATALYST INTO CONTACT WITH ACIDIC CRACKING CATALYST PARTICLES MAINTAINED AT A TEMPERATURE WITHIN THE RANGE OF 550*F. TO 750*F.; WITHDRAWING EFFLUENT VAPORS FROM THE CATALYST PARTICLES, SAID VAPORS CONTAINING A QUANTITY OF TRIETHYLENEDIAMINE CONSTITUTING AT LEAST 5% OF THE AMINE CHARGED TO THE CATALYST; SEPARATING ALL NORMALLY GASEOUS COMPONENTS FROM SAID EFFLUENT TO PROVIDE A RESIDUE OF NORMALL LIQUIDS AND SOLIDS; SEPARATING AMMONIA FROM SAID GASEOUS COMPONENTS AND DIRECTING AT LEAST A PORTION THEREOF TO SAID PREPARATION OF THE GASEOUS MIXTURE; AND SUBJECTING SAID RESIDUE TO FRACTIONAL DISTILLATION TO PREPARE A DISTILLATE CONTAINING TRIETHYLENEDIAMINE.
Claim 2
Independent Claim
160 words
THE METHOD OF PREPARING TRIETHYLENEDIAMINE WHICH INCLUDES THE STEPS OF: PREPARING A GASEOUS MIXTURE CONSISTING PREDOMINANTLY OF (HOCH2CH2)NH(3-N)N WHEREIN N IS AN INTEGER LESS THAN 4 AND AMMONIA, THE MOLAR RATIO OF AMMONIA TO AMINE BEING WITHIN THE RANGE FROM 3 TO 1 TO 12 TO 1, PASSING SAID MIXTURE AT A SPACE VELOCITY OF FROM 0.1 TO 2 VOLUMES OF LIQUID AMINE PER VOLUME OF CATALYST INTO CONTACT WITH ACIDIC CRACKING CATALYST PARTICLES MAINTAINED AT A TEMPERATURE WITHIN THE RANGE OF 550*F. TO 750*F.; WITHDRAWING EFFLUENT VAPORS FROM THE CATALYST PARTICLES, SAID VAPORS CONTAINING A QUANTITY OF TRIETHYLENEDIAMINE CONSTITUTING AT LEAST 5% OF THE AMINE CHARGED TO THE CATALYST; SEPARATING ALL NORMALLY GASEOUS COMPONENTS FROM SAID EFFLUENT TO PROVIDE A RESIDUE OF NORMALL LIQUIDS AND SOLIDS; SEPARATING AMMONIA FROM SAID GASEOUS COMPONENTS AND DIRECTING AT LEAST A PORTION THEREOF TO SAID PREPARATION OF THE GASEOUS MIXTURE; AND SUBJECTING SAID RESIDUE TO FRACTIONAL DISTILLATION TO PREPARE A DISTILLATE CONTAINING TRIETHYLENEDIAMINE.
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) | 1964-03-27 | 1964-09-26 | 1965-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-03-27 | 1968-09-26 | 1969-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-03-27 | 1972-09-26 | 1973-03-28 | $7700.00 | Window Closed / Lapsed |