By phenol and the salicylic method of supercritical carbon dioxide one-step synthesis

The present invention relates to one kind by phenol and the salicylic method of supercritical carbon dioxide one-step synthesis, belong to salicylic acid synthesis technical field.This method is to load potassium carbonate as catalyst, by phenol and supercritical carbon dioxide salicylate.The present invention is used as catalyst using support type potassium carbonate, product and catalyst is separated simply, simplifies conventional process flow, and eliminates the pickling in traditional handicraft, water-washing process, belongs to green process for cleanly preparing；The conversion ratio of phenol and salicylic selectivity are improved, realizes continuous production, phenol conversion can reach 100%, and salicylic selectivity is up to 99.3%.