Method for preparing phenylacetate

Abstract

The invention discloses a method for preparing phenylacetate. The method comprises the following steps of: 1, mixing phenol and acetic acid in a molar ratio of 1:1.1, andsimultaneously adding the mixture into pyridine propyl sulfonic acid ionic liquid, wherein the ratio of the pyridine propyl sulfonic acid ionic liquid to the mixture of the phenol and the acetic acid is 1ml:1.05mol; 2, heating the mixed solution in oil bath, wherein the temperature is controlled to be between 120 and 130 DEG C; and 3, refluxing for 2 to 6 hours, performing distillation to remove the unreacted phenol and acetic acid, and collecting the phenylacetate separated at the temperature of between 190 and 195 DEG C. The method has the advantages that: the pyridine propyl sulfonic acid ionic liquid is used as a catalyst; the use of a solvent is avoided; the operation is simple and safe; the production cost is low; and the industrialization of phenylacetate can be realized easily.

Description

technical field The present invention relates to a kind of preparation method of ester, particularly a kind of preparation method of phenyl acetate. Background technique The preparation method of existing phenyl acetate mainly contains: (1) Prepared by reacting sodium phenate with acetic anhydride. Heat phenol and acetic anhydride to boiling, reflux for 3 hours, wash with water, alkali, and water in sequence after cooling, and dry over anhydrous sodium sulfate, distill and collect fractions at 190-195°C as phenyl acetate, with a yield of about 83%. This method has shortcomings such as severe corrosion of equipment and low utilization rate of equipment; the reactant acetic anhydride used has a pungent smell, and its vapor is tear gas, which belongs to low-toxicity chemicals; Thermal energy can cause combustion and explosion, and can react with strong oxidants; the production process is complicated and the price is high; when used to synthesize phenyl acetate, the utiliza...

AI Technical Summary

Problems solved by technology

The synthesis of phenyl acetate with acetyl chloride has the disadvantages of high cost, high equipment requirements, and serious corrosion of by-product hydrogen chloride.

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