Nitration reactions with acid anhydride promoters
Patent 4921970 Issued on May 1, 1990. Estimated Expiration Date: 
May 1, 2007. 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.
May 1, 2007. 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 3397229 3415876 3868389 3887588 Process for making N-methyl nitrophthalimides Process for making dinitrotoluene Process for the production of nitro derivatives of aromatic compounds Process for the production of aromatic mononitro compounds Process for the preparation of mononitro-aromatic compounds Patent #: 4112005 InventorApplicationNo. 012318 filed on 02/09/1987US Classes:548/480The ring nitrogen of the five-membered hetero ring is unsubstituted or hydrocarbyl substituted onlyExaminersPrimary: Ceperley, Mary E.Attorney, Agent or FirmForeign Patent References
International ClassC07D 209/50AbstractAn improved nitric acid only nitration process wherein the improvement comprises adding an effective amount of a nitration promoting acid anhydride to the reaction mixture to enhance the rate of nitration.Other References
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