Process for making dinitrotoluene
Patent 3981933 Issued on September 21, 1976. Estimated Expiration Date: 
September 21, 1993. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
September 21, 1993. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 2826611 3100797 InventorsApplicationNo. 05/605398 filed on 08/18/1975US Classes:568/934, Single methyl and plural nitros only bonded directly to benzene ring (e.g., dinitrotoluene, etc.)548/481, Chalcogen or nitrogen attached indirectly to ring carbon of the bicyclo ring system by acyclic nonionic bonding558/424, Two benzene rings bonded directly to the same oxygen, or nitrogen bonded directly to oxygen (e.g., nitro compounds, phenoxyphenyl compounds, etc.)562/490, Naphthyl group568/585, Plural rings containing568/711, Dinitro568/929, Polycyclo ring system568/930, Polynitro568/931, Polynitro568/932, Polynitro568/936, Halogen containing568/938, Plural halogens bonded directly to benzene ring568/940Methyl bonded directly to benzene ring (e.g., nitroxylene, etc.)ExaminersPrimary: Sebastian, Leland A.Attorney, Agent or FirmInternational ClassesC07B 43/02 (20060101)C07B 43/00 (20060101) C07C 205/06 (20060101) C07C 205/45 (20060101) C07C 205/23 (20060101) C07C 201/00 (20060101) C07C 205/00 (20060101) C07C 205/38 (20060101) C07C 205/12 (20060101) C07C 205/57 (20060101) C07C 201/08 (20060101) AbstractNitrated 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. |
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