Selective separation of 2,6-dinitrotoluene from dinitrotoluene mixture
专利汇可以提供Selective separation of 2,6-dinitrotoluene from dinitrotoluene mixture专利检索，专利查询，专利分析的服务。并且PURPOSE: To obtain the title compound which is useful as an intermediate for syntheses of perfumes, medicines, etc. safely in high purity, by the selective reduction of 2,4-species through the hydrogenation of dinitrotoluene mixture in the presence of a catalyst under pressure.
CONSTITUTION: Mixture of 2,4- and 2,6-dinitrotoluenes is hydrogenated in an autoclave under pressure, preferably at 40W50atm, in the presence of a catalyst such as palladium carbon, Raney mickel, Raney cobalt or platinum black, preferably at 40W50°C. Thereby, nitro group at 4 position of the 2,4-species recieves reductive action most easily, and the 2,4-species is selectively converted into an amine by the addition of hydrogen in an amount corresponding to 4 position of the 2,4-species. The title compound is obtained by removing the amine part from a reaction mixture through acid treatment and recrystallizing the residual non-amine part. Methyl alcohol, benzene, dimethylformamide, etc. is preferably used as a solvent in said reaction.
COPYRIGHT: (C)1980,JPO&Japio，下面是Selective separation of 2,6-dinitrotoluene from dinitrotoluene mixture专利的具体信息内容。
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