Can ethyl p-nitrobenzoate after suction filtration and washing be dried by heat?

The melting point of ethyl p-nitrobenzoate is about 57 degrees. Generally, thermal drying is not considered, but vacuum drying or freeze drying is adopted.

Whether the esterification product after suction filtration and washing can be dried by thermal drying depends on its decomposition temperature. Generally, low temperature or low temperature plus vacuum can be used. If the thermal stability is good, there is no problem in heating and drying, and most esterified products are still thermally stable.

The main reaction of (1) esterification is o2n-ar-cooh+c2h5oh = o2n-ar-cooc2h5+H2O.

(2) Esterification side reaction: C2H5OH+C2H5OH = (C2H5) 2O+H2O

(3) main hydrogenation reaction: o2n-ar-cooc2h5+3h2 = h2n-ar-cooc2h5+2h2o.

Extended data:

(1) direct esterification method, but there are side reactions, and the purity and yield are moderate;

(2) Using imine salt as catalyst, the yield is only 64%, which is not suitable for industrialization;

(3) Solid-liquid phase transfer catalysis, which lasts for 24 h and the catalyst is highly toxic;

(4) esterification with orthoester. The yield is 60% ~ 85%, and the cost is high, which is not suitable for industrial demand;

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