Extracting method of synthetic peach aldehyde

Abstract

The invention provides an extracting method of synthetic peach aldehyde and relates to the industrial field. The extracting method comprises the following steps that 1, octanol, crylic acid and peroxides are placed in a container, and a stirrer is used for full stirring so that the octanol, the crylic acid and the peroxides are uniformly mixed; 2, octanol and cocatalysts are added into a reactor provided with a stirrer, a backflow condensing device and a dropping device; the stirrer is started, materials are heated to a preset temperature, and mixtures of the octanol, the crylic acid and the peroxides are dropped into the reactor within 4 to 10 hours; and under the stirring effect, the backflow reaction is carried out until no moistures or the like are distilled off from a by-product collector, the reaction is finished, and reaction mixtures containing the peach aldehyde are obtained; 3, the reaction mixtures are transferred into a vacuum distillation device, and unreacted octanol is recovered through distillation at 133.3 Pa; 4, the reaction mixtures after the octanol recovery are transferred into the vacuum distillation device, reaction products are extracted through fractionation, and peach aldehyde is obtained; and 5, the peach aldehyde is placed into a special fragrance processing device, and peach aldehyde finished products are obtained. The extracting method has the advantages that the process is simple, the equipment requirement is lower, the treatment condition is mild, the treatment cost is low, the energy consumption is low, in addition, no harmful emission is generated, and the extracting method is suitable for mass production; and the prepared peach aldehyde is colorless clear liquid, has intense peach and amygdaloid fragrance and has no miscellaneous odor.

Description

technical field [0001] The invention relates to the industrial field, in particular to an extraction method for synthesizing peach aldehyde. Background technique [0002] Peach aldehyde, γ-unsecalactone, also known as γ-undecalactone, tetradecaldehyde. CAS No. 104-67-6, FEMA 3091, molecular formula C11H20O2; molecular weight 184.28. Peach aldehyde is not a real aldehyde, but a lactone, whose structural formula is: [0003] [0004] Peach aldehyde is a colorless clear liquid with a strong peach and almond-like aroma. d 20 0.940-0.945, n D 20 1.449 - 1.454, b.p. 297°C, flash point > 100°C; insoluble in water and glycerin, soluble in most organic solvents such as ethanol and propylene glycol. [0005] At present, the method of free radical addition reaction between methyl acrylate and octanol in the presence of peroxide is mostly used in industry to synthesize peach aldehyde. The process of this method is relatively mature, and its advantages are lower cost, shor...

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Problems solved by technology

[0011] The existing problem of peach aldehyde synthetic method, the one, synthetic reaction yield is low, thereby affects production cost on the high side, makes production enterprise unbearable; Two The by-products of the synthetic reaction are irritating to a certain extent, which is not ideal for the production environment; the third is that the aroma of peach aldehyde produced is not soft enough to meet the requirements of foreign customers

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