Patent US2636051A successfully refreshed from Google Patents.
US2636051A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of diamine
Assignee: Shell Development Co
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Filing: 1948-04-05
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Granted: 1953-04-21
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Expires: 1968-04-05
Abstract
No abstract record available.
Inventors
- 👤 Richard R Whetstone
- 👤 Seaver A Ballard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:29
CPC Classifications
C; C07; C07C; C07C209/00; C07C209/24; C07C209/26
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
138 words
IN A PROCESS FOR THE PRODUCTIOIN OF AMINES BY CONDENSATION OF A SATURATED ALIPHATIC DIALDEHYDE WHEREIN THE TWO FORMYL GROUPS ARE SEPARATED BY AN INTERRUPTED CHAIN OF AT LEAST FOUR CARBON ATOMS, SAID DIALDEHYDE CONTAINING A TOTAL OF FROM SIX TO TWELVE CARBON ATOMS, WITH AN AMINO COMPOUND OF THE GROUP CONSISTING OF AMMONIA AND THE PRIMARY AND THE SECONDARY ALKYLAMINES AND HYDROCARBON, THE METHOD OF PRODUCING ACYCLIC SATURATED DIAMINES WHICH COMPRISES GRADUALLY INTRODUCING THE SATURATED ALIPHATIC DIALDEHYDE INTO A CONFINED REACTION ZONE CONTAINING THE AMINO COMPOUND IN EXCESS COMPARED ON A STOICHIOMETRIC BASIS TO THE DIALDEHYDE, MOLECULAR HYDROGEN UNDER PRESSURE, AND A HYDROFENATION CATALYST AND CONTROLLING THE RATE OF INTRODUCTION OF THE DIALDEHYDE AT A RATE NOT SUBSTANTIALLY GREATER THAN THE RATE OF CONVERSION OF THE DIALDEHYDE IN THE ENSUING CONDENSATION WITH THE AMINO COMPOUND AND HYDROGEN.
Claim 2
Dependent Claim
138 words
IN A PROCESS FOR THE PRODUCTIOIN OF AMINES BY CONDENSATION OF A SATURATED ALIPHATIC DIALDEHYDE WHEREIN THE TWO FORMYL GROUPS ARE SEPARATED BY AN INTERRUPTED CHAIN OF AT LEAST FOUR CARBON ATOMS, SAID DIALDEHYDE CONTAINING A TOTAL OF FROM SIX TO TWELVE CARBON ATOMS, WITH AN AMINO COMPOUND OF THE GROUP CONSISTING OF AMMONIA AND THE PRIMARY AND THE SECONDARY ALKYLAMINES AND HYDROCARBON, THE METHOD OF PRODUCING ACYCLIC SATURATED DIAMINES WHICH COMPRISES GRADUALLY INTRODUCING THE SATURATED ALIPHATIC DIALDEHYDE INTO A CONFINED REACTION ZONE CONTAINING THE AMINO COMPOUND IN EXCESS COMPARED ON A STOICHIOMETRIC BASIS TO THE DIALDEHYDE, MOLECULAR HYDROGEN UNDER PRESSURE, AND A HYDROFENATION CATALYST AND CONTROLLING THE RATE OF INTRODUCTION OF THE DIALDEHYDE AT A RATE NOT SUBSTANTIALLY GREATER THAN THE RATE OF CONVERSION OF THE DIALDEHYDE IN THE ENSUING CONDENSATION WITH THE AMINO COMPOUND AND HYDROGEN.
Claim 3
Dependent Claim
122 words
IN A PROCESS FOR THE PRODUCTION OF AMINES BY CONDENSATION OF ALPHA-HYDROXYADIPALDEHYDE WITH AMMONIA AN HYDROGEN, THE METHOD OF PRODUCING 2-HYDROXY-1,6-HEXANEDIAMINE WHICH COMPRISES GRADUALLY INTRODUCING AN AQUEOUS SOLUTION OF ALPHA-HYDROXYADIPALDEHYDE INTO A CONFINED REACTION ZONE CONTAINING AMMONIA IN AN AMOUNT IN MOLES NOT LESS THAN 20 TIMES THE AMOUNT OF THE ALPHA-HYDROYADIPALDEHYDE, MOLECULAR HYDROGEN, AND A HYDROGENERATION CATALYST AT A TEMPERATURE OF FROM ABOUT 30* C. TO ABOUT 150* C UNDER A PRESSURE OF FROM ABOUT 200 POUNDS PER SQUARE INCH TO ABOUT 5000 POUNDS PER SQUARE INCH CONTROLING THE RATE OF INTRODUCTION OF THE AQUEOUS SOLUTION OF ALPHA-HYDROXYADIPALDEHYDE AT A RATE NOT SUBSTANTIALLY GREATER THAN THE RATE OF CONVERSION OF THE ALPHA-HYDROXYADIPALDEHYDE IN THE ENSUING CONDENSATION WITH THE AMMONIA AND HYDROGEN.
Claim 4
Dependent Claim
122 words
IN A PROCESS FOR THE PRODUCTION OF AMINES BY CONDENSATION OF ALPHA-HYDROXYADIPALDEHYDE WITH AMMONIA AN HYDROGEN, THE METHOD OF PRODUCING 2-HYDROXY-1,6-HEXANEDIAMINE WHICH COMPRISES GRADUALLY INTRODUCING AN AQUEOUS SOLUTION OF ALPHA-HYDROXYADIPALDEHYDE INTO A CONFINED REACTION ZONE CONTAINING AMMONIA IN AN AMOUNT IN MOLES NOT LESS THAN 20 TIMES THE AMOUNT OF THE ALPHA-HYDROYADIPALDEHYDE, MOLECULAR HYDROGEN, AND A HYDROGENERATION CATALYST AT A TEMPERATURE OF FROM ABOUT 30* C. TO ABOUT 150* C UNDER A PRESSURE OF FROM ABOUT 200 POUNDS PER SQUARE INCH TO ABOUT 5000 POUNDS PER SQUARE INCH CONTROLING THE RATE OF INTRODUCTION OF THE AQUEOUS SOLUTION OF ALPHA-HYDROXYADIPALDEHYDE AT A RATE NOT SUBSTANTIALLY GREATER THAN THE RATE OF CONVERSION OF THE ALPHA-HYDROXYADIPALDEHYDE IN THE ENSUING CONDENSATION WITH THE AMMONIA AND HYDROGEN.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-04-20 | 1956-10-20 | 1957-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-04-20 | 1960-10-20 | 1961-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-04-20 | 1964-10-20 | 1965-04-21 | $7700.00 | Window Closed / Lapsed |