US3211630A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for purification of nitromethane
Assignee: Commercial Solvents Corp
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Filing: 1964-05-28
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Granted: 1965-10-12
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Expires: 1984-05-28
Abstract
Abstract Nitromethane is recovered from mixtures with higher nitroalkanes by adding to said mixtures sufficient water and C6- 8 alkane or cycloalkane to form an azeotropic mixture with said nitromethane, and heating the mixture to distil off said azeotrope. The said azeotrope condenses into three layers, the lowest of which contains the nitromethane with minor amounts of water and alkane. The water and alkane may be removed by further distillation up to 101.5 DEG C.
Inventors
- 👤 John B Tindall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 07:24
CPC Classifications
C; C07; C07C; C07C201/00; C07C201/06; C07C201/16; C07C205/00; C07C205/01; C07C205/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
64 words
A PROCESS FOR THE PURIFICATION OF NITROMETHANE IN ADMIXTURE WITH HIGHR NITROALKANES COMPRISING ADDING WATER AND AN ALKANE CONTAINING FROM 6 TO8 CARBON ATOMS TO SAID NITROMETHANE MIXTURE IN AN AMOUNT SUFFICIENT TO FORM AN AZEOTROPIC MIXTURE WITH SAID NITROMETHANE, HEATING THE MIXTURE TO PRODUCE AN AZEOTROPE CONTAINING NITROMETHANE, WATER AND ALKANE, CONDENSING THE AZEOTROPE TO PRODUCE A NITROMETHANE CONDENSATE, AND RECOVERING THE NITROMETHANE.
Claim 2
Dependent Claim
64 words
A PROCESS FOR THE PURIFICATION OF NITROMETHANE IN ADMIXTURE WITH HIGHR NITROALKANES COMPRISING ADDING WATER AND AN ALKANE CONTAINING FROM 6 TO8 CARBON ATOMS TO SAID NITROMETHANE MIXTURE IN AN AMOUNT SUFFICIENT TO FORM AN AZEOTROPIC MIXTURE WITH SAID NITROMETHANE, HEATING THE MIXTURE TO PRODUCE AN AZEOTROPE CONTAINING NITROMETHANE, WATER AND ALKANE, CONDENSING THE AZEOTROPE TO PRODUCE A NITROMETHANE CONDENSATE, AND RECOVERING THE NITROMETHANE.
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) | 1968-10-11 | 1969-04-12 | 1969-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-11 | 1973-04-12 | 1973-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-11 | 1977-04-12 | 1977-10-12 | $7700.00 | Window Closed / Lapsed |