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- W2361832785 abstract "A variety of polymeric phase transfer catalysts with quaternary ammonium active center was synthesized by means of quarterisation of tertiary amine and chloromethylated polystyrene polymer,and then was used in the purification of crude m-dinitrobenzene,where p-dinitrobenzene and o-dinitrobenzene were tranferred into nitrodiphenyl ether.The optimum process conditions and the best catalyst were determined on the basis of the reaction yields with different regents and catalysts.It was concluded that polystyrene polymer pyridine and methnol were the best catalyst and oxyalkylation reagent for this reaction.Under the optimum process conditions of m(crude m-dinitrobenzene)∶ m(methnol)∶ m(sodium hydroxide)∶ m(polystyrene polymer pyridine) being 1∶ 0.8∶ 0.1∶ 0.12,and temperature and reaction time being 76~78 ℃ and 2 h,the conversion rate of m-dinitrobenzene reached 99.5%,and the purity of the refined m-dinitrobenzene was 99.8% with its yield being about 99%.Polystyrene polymer pyridine resin was very easy to prepare and could be repeatedly used for at least 7 times." @default.
- W2361832785 created "2016-06-24" @default.
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- W2361832785 date "2012-01-01" @default.
- W2361832785 modified "2023-09-23" @default.
- W2361832785 title "Purification of m-Dinitrobenzene by Triphrase Transfer Catalysis" @default.
- W2361832785 hasPublicationYear "2012" @default.
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