US3155728A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for the preparation of polyglycol primary amine
Assignee: Texaco Inc
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Filing: 1960-10-11
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Granted: 1964-11-03
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Expires: 1980-10-11
Abstract
No abstract record available.
Inventors
- 👤 Sherman D Lesesne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:28
CPC Classifications
C; C08; C08G; C08G65/00; C08G65/02; C08G65/26; C08G65/2618; C08G65/2621; C07; C07C; C07C213/00; C07C213/02; C07C213/04; C07C213/08; C07C217/00; C07C217/02; C07C217/04; C07C217/06; C07C217/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
238 words
A METHOD OF PREPARING A POLYGLYCOL PRIMARY AMINE WHICH COMPRISES THE STEPS OF: (1) REACTING AN ALIPHATIC CARBONYL COMPRUND CONTAINING FROM 3 TO 8 CARBON ATOMS WITH ABOUT AN EQUIMOLAR AMOUNT OF A PRIMARY ALKANOLAMINE CONTAINING FROM 2 TO 4 CARBON ATOMS IN THE ABSENCE OF A SOLVENT AT A TEMPERATURE WITHIN THE RANGE OF ABOUT 70* TO ABOUT 175*C. FOR A PERIOD OF TIME WIHTIN THE RANGE OF ABOUT 10 TO ABOUT 80 HOURS TO PROVIDE A SCHIFF BASE; (2) REACTING SAID SCHIFF BASE WITH FROM ABOUT 1 TO ABOUT 100 MOLS PER MOL OF SCHIFF BASE OF AN ALKYLENE OXIDE CONTAINING 2 TO 4 CARBON ATOMS IN THE PRESENCE OF AN OXYALKYLATION CATALYST AT A TEMPERATURE WITHIN THE RANGE OF ABOUT 40* TO ABOUT 200*C. AND A PRESSURE WITHIN THE RANGE OF ABOUT 0 TO 1000 P.S.I.G. FOR A PERIOD OF TIME WITHIN THE RANGE OF ABOUT 1 TO 6 HOURS TO FORM AN ALKYLENE OXIDE ADDUCT OF SAID SCHIFF BASE; (3) SUBJECTING SAID ALKYLENE OXIDE ADUCT TO VACUUM STRIPPING AT A PRESSURE FROM 1 TO 20 MM. OF MERCURY TO SUBSTANTIALLY COMPLETELY REMOVED UNREACTED ALKYLENE OXIDE; (4) CONTACTING SAID STRIPPED ADDUCT WITH AN AMOUNT OF ACID SUFFICIENT TO NEUTRALIZE SAID ADDUCT; (5) HYDROLYZING SAID NEUTRALIZED ADDUCT WITH WATER AT ABOUT THE BOILING POINT OF WATER TO FORM SAID POLYGLYCOL PRIMARY AMINE; AND (6) RECOVERING SAID POLYGLYCOL PRIMARY AMINE FROM THE PRODUCTS OF SAID HYDROLYSIS REACITION.
Claim 2
Independent Claim
238 words
A METHOD OF PREPARING A POLYGLYCOL PRIMARY AMINE WHICH COMPRISES THE STEPS OF: (1) REACTING AN ALIPHATIC CARBONYL COMPRUND CONTAINING FROM 3 TO 8 CARBON ATOMS WITH ABOUT AN EQUIMOLAR AMOUNT OF A PRIMARY ALKANOLAMINE CONTAINING FROM 2 TO 4 CARBON ATOMS IN THE ABSENCE OF A SOLVENT AT A TEMPERATURE WITHIN THE RANGE OF ABOUT 70* TO ABOUT 175*C. FOR A PERIOD OF TIME WIHTIN THE RANGE OF ABOUT 10 TO ABOUT 80 HOURS TO PROVIDE A SCHIFF BASE; (2) REACTING SAID SCHIFF BASE WITH FROM ABOUT 1 TO ABOUT 100 MOLS PER MOL OF SCHIFF BASE OF AN ALKYLENE OXIDE CONTAINING 2 TO 4 CARBON ATOMS IN THE PRESENCE OF AN OXYALKYLATION CATALYST AT A TEMPERATURE WITHIN THE RANGE OF ABOUT 40* TO ABOUT 200*C. AND A PRESSURE WITHIN THE RANGE OF ABOUT 0 TO 1000 P.S.I.G. FOR A PERIOD OF TIME WITHIN THE RANGE OF ABOUT 1 TO 6 HOURS TO FORM AN ALKYLENE OXIDE ADDUCT OF SAID SCHIFF BASE; (3) SUBJECTING SAID ALKYLENE OXIDE ADUCT TO VACUUM STRIPPING AT A PRESSURE FROM 1 TO 20 MM. OF MERCURY TO SUBSTANTIALLY COMPLETELY REMOVED UNREACTED ALKYLENE OXIDE; (4) CONTACTING SAID STRIPPED ADDUCT WITH AN AMOUNT OF ACID SUFFICIENT TO NEUTRALIZE SAID ADDUCT; (5) HYDROLYZING SAID NEUTRALIZED ADDUCT WITH WATER AT ABOUT THE BOILING POINT OF WATER TO FORM SAID POLYGLYCOL PRIMARY AMINE; AND (6) RECOVERING SAID POLYGLYCOL PRIMARY AMINE FROM THE PRODUCTS OF SAID HYDROLYSIS REACITION.
References Cited (Backward Citations)
US2629740A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-11-03 | 1968-05-04 | 1968-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-11-03 | 1972-05-04 | 1972-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-11-03 | 1976-05-04 | 1976-11-03 | $7700.00 | Window Closed / Lapsed |