Continuous purification system and method for spice-grade benzyl acetate

Abstract

The invention provides a continuous purification system and method for perfume-grade benzyl acetate. The system comprises a washing unit, a flash evaporation unit and an adsorption unit which are connected through a conveying device, the method comprises the following steps: washing rectified industrial-grade benzyl acetate through a washing unit to remove water-soluble acidic substances and other micromolecular impurities, carrying out azeotropy with water in vacuum through a flash evaporation unit to remove low-boiling-point organic impurities in benzyl acetate, and finally carrying out multiple adsorption through an adsorption unit to obtain benzyl acetate. And it is ensured that the output spice-grade benzyl acetate product is free of impurities and peculiar smells. All the units of the continuous purification system supplement each other functionally, industrial-grade benzyl acetate obtained through rectification is subjected to a continuous purification process, and the application requirements of perfume-grade high-end products are met. The three units of the purification system adopt a continuous process, so that the efficiency is extremely high, the advantages are obvious, and industrial production is facilitated; the prepared benzyl acetate is high in purity and good in smell, and the application range of the spice-grade benzyl acetate is widened.

Description

technical field [0001] The invention relates to the technical field of benzyl acetate purification, in particular to a continuous purification system and method for perfume-grade benzyl acetate. Background technique [0002] Benzyl acetate is a colorless liquid with a rich jasmine aroma, chemical formula C 9 H 10 O 2 , Insoluble in water and glycerol, but miscible with alcohols, ethers, ketones, aliphatic hydrocarbons, aromatic hydrocarbons, etc. In the fragrance industry, benzyl acetate is often used in the preparation of floral flavors such as jasmine, soap flavors, and edible flavors such as apple, raw pear, banana, cherry, plum and pineapple. Because benzyl acetate has excellent aroma, high chemical stability, can be mixed with various organic compounds, and is relatively easy to synthesize, benzyl acetate has become the most widely used ester fragrance; Among the well-known fragranced products, such as perfume, cosmetic essence, soap essence, etc., their dosage rank...

AI Technical Summary

Problems solved by technology

[0004] The above methods for preparing benzyl acetate all need to be separated and purified through distillation, fractional distillation and other high-temperature processes. Although the purity of benzyl acetate is improved in this process; but because benzyl acetate is at high temperature for a long time, it is prone to coking, resulting in Odor impurities, and some low-boiling point impurities and fine impurities are difficult to remove, which cannot meet the quality requirements of fragrance-grade benzyl phenylacetate, which limits the application of benzyl acetate in fragrance-grade high-end products

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