Refining method of spice benzyl acetate

A technology of benzyl acetate and refining method, which is applied in the direction of carboxylate preparation, essential oil/fragrance, chemical instruments and methods, etc., can solve the problem of affecting the acid value and color of benzyl acetate, affecting the smell of benzyl acetate, and the difficulty of benzaldehyde Separation and other problems to achieve the effect of improving quality, solving environmental protection problems, and saving water

Inactive Publication Date: 2018-06-08
QIANJIANG XINYIHONG ORGANIC CHEM
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  • Summary
  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0003] The synthetic method of benzyl acetate has many kinds, and a kind of method wherein is prepared by the reaction of dibenzyl ether and acetic anhydride, and this method does not have the aftertreatment problem that by-product causes, and product is excellent, but in benzyl acetate rectifying stage, Because benzaldehyde and be

Method used

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Embodiment Construction

[0012] The technical solutions in the embodiments of the present invention are clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0013] The invention provides a kind of refining method of perfume benzyl acetate, the refining method of this perfume benzyl acetate comprises:

[0014] Pickling: prepare 1000Kg of sodium bisulfite solution with a mass fraction of 30% in the acid / alkali washing kettle, start stirring, stir evenly, then drop into 4000Kg common benzyl acetate finished product (benzyl acetate) in the acid / alkali washing kettle The mass fraction of benzaldehyde is not less than 99.5%, and benzaldehyde is 300-600ppm), after stirring for 30 hours, stop sti

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Abstract

The embodiment of the invention discloses a refining method of spice benzyl acetate. The method comprises the steps of acid pickling: preparing a sodium hydrogen sulfite solution in an acid/alkali washing kettle, feeding a common benzyl acetate finished product, stirring, settling for layering, extracting an oil phase, carrying out chromatographic analysis on the oil phase, discharging acid waterin a water-phase into an acid water storage tank, and leaving the oil phase into the acid/alkali washing kettle; alkali washing: adding a sodium carbonate solution into the acid/alkali washing kettle,stirring, settling for layering, extracting an oil phase, detecting an acid value of the oil phase, discharging alkali water in the water-phase into an alkali water storage tank; distilling: pumpingthe alkali-washed oil phase into a distillation still, carrying out reduced pressure distillation, sampling, carrying out chromatographic analysis and moisture measurement analysis on the sample, closing jacket steam, and packaging benzyl acetate in a distillation still. According to the refining method of the spice benzyl acetate provided by the invention, benzaldehyde in the benzyl acetate is removed by utilizing the low-cost acid/alkali washing method, so that the quality of the benzyl acetate is improved, the acid water and the alkali water incapable of being recycled are transferred to atriple effect evaporator so as to be treated and recycled, the method is environmentally-friendly and water-saving.

Description

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Claims

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Application Information

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Owner QIANJIANG XINYIHONG ORGANIC CHEM
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