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US3981933A
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Process for making dinitrotoluene
Assignee: General Electric Co
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Filing: 1975-08-18
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Granted: 1976-09-21
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Expires: 1995-08-18
Abstract
Abstract Nitrated derivatives of aromatic compounds are obtained by contacting the latter, in the presence of methylene chloride as a reaction medium, with concentrated nitric acid in the presence of concentrated sulfuric acid, and thereafter isolating the formed nitro derivatives.
Inventors
- 👤 Newell C. Cook
- 👤 Gary C. Davis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:21
CPC Classifications
C; C07; C07C; C07C317/00; C07B; C07B43/00; C07B43/02; C07C201/00; C07C201/06; C07C201/08; C07C2603/00; C07C2603/02; C07C2603/04; C07C2603/06; C07C2603/10; C07C2603/12; C07C2603/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
The process for making dinitrotoluene which comprises (1) forming a solution of toluene in methylene chloride, (2) adding a mixture of concentrated sulfuric acid having a concentration of at least 90% and concentrated nitric acid of at least 90% concentration to the methylene chloride solution at a temperature of from 42° to 45°C., the said acid being close to the stoichiometric amount required to attach two nitro groups to the toluene, and (3) extracting the dinitrotoluene from the reaction mixture with additional methylene chloride.
Claim 2
Dependent Claim
84 words
The process for making dinitrotoluene which comprises (1) forming a solution of toluene in methylene chloride, (2) adding a mixture of concentrated sulfuric acid having a concentration of at least 90% and concentrated nitric acid of at least 90% concentration to the methylene chloride solution at a temperature of from 42° to 45°C., the said acid being close to the stoichiometric amount required to attach two nitro groups to the toluene, and (3) extracting the dinitrotoluene from the reaction mixture with additional methylene chloride.
References Cited (Backward Citations)
US2826611A
Cited
US3100797A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-09-21 | 1980-03-22 | 1980-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-09-21 | 1984-03-22 | 1984-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-09-21 | 1988-03-22 | 1988-09-21 | $7700.00 | Window Closed / Lapsed |