US4352699A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Co-nitrating trimetholethane and diethylene glycol
Assignee: Ireco Inc
•
Filing: 1981-06-01
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Granted: 1982-10-05
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Expires: 2001-06-01
Abstract
Abstract It has been discovered that when co-nitrating a mixture of trimethylolethane and diethylene glycol, a storage stable spent acid can be obtained if during the co-nitration an excess of from about 60 to about 100% by weight of nitric acid over that stoichiometrically required is employed.
Inventors
- 👤 Edward H. Zeigler, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 02:53
CPC Classifications
C; C06; C06B; C06B25/00; C07; C07C; C07C201/00; C07C201/02
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
45 words
In a process of co-nitrating a mixture of trimethylolethane and diethylene glycol with a mixture of sulfuric and nitric acids, the improvement of using an excess of between about 65 to about 100% by weight of nitric acid above the stoichiometric requirement for the co-nitration.
Claim 2
Dependent Claim
45 words
In a process of co-nitrating a mixture of trimethylolethane and diethylene glycol with a mixture of sulfuric and nitric acids, the improvement of using an excess of between about 65 to about 100% by weight of nitric acid above the stoichiometric requirement for the co-nitration.
Claim 3
Dependent Claim
28 words
The process of claim 1 wherein the ratio of trimethylolethane to diethylene glycol is from about 40 to 60% by weight to about 70 to 30% by weight.
Claim 4
Dependent Claim
16 words
The process of claim 1 wherein a storage stable spent acid is removed following the co-nitration.
References Cited (Backward Citations)
US3306790A
Cited
GB382123A
Cited
US3951706A
Cited
US3238074A
Cited
US3639183A
Cited
US3844856A
Cited
US3423256A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-10-04 | 1986-04-05 | 1986-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-10-04 | 1990-04-05 | 1990-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-10-04 | 1994-04-05 | 1994-10-05 | $7700.00 | Window Closed / Lapsed |