91137-51-8Relevant articles and documents
Method for catalyzing selective nitrification of 2-methoxynaphthalene by utilizing zeolite molecular sieve
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Paragraph 0038-0088, (2019/12/29)
The invention discloses a method for catalyzing selective nitrification of 2-methoxynaphthalene by utilizing a zeolite molecular sieve. The method comprises the following steps: S1, dissolving 6 mmolof 2-methoxynaphthalene in 10 mL of dichloromethane, adding 5 mL of acetic anhydride and 0.3-1.1 g of the zeolite molecular sieve catalyst, slowly adding 2 mmol of aluminum nitrate in a stirring state, and carrying out a water bath stirring reaction at 25 DEG C for 12 h; S2, hydrolyzing acetic anhydride at 40 DEG C for 1 h after the reaction is finished; S3, extracting, washing and drying the reacted solution obtained in step S2 after THE hydrolysis is completed; and S4, performing rotary evaporation on the dichloromethane in a solution product obtained in step S3 to achieve evaporative crystallization in order to obtain a crude extract, wherein the raw material conversion rate reaches 85.20-100%, the yield reaches 69.88-82.02%, and the isomerization rate reaches 1.56-6.09. The zeolite molecular sieve is used for catalyzing the selective nitration reaction of 2-methoxynaphthalene for the first time, the catalytic effect of the ZSM-5 zeolite molecular sieve is the most remarkable, and when the weight of the ZSM-5 catalyst is 0.9 g, the substrate conversion rate is high and reaches 93.98%, the yield is 77.09%, and the isomerization rate reaches 6.05%.
