Method for catalytically synthesizing methyl sorbate based on eutectic solvent

• Main Authors: QI YU, XU JUMEI, XUE WEILAN, LIANG FEI, WANG HAONAN, ZENG ZUOXIANG
• Format: Patent
• Language: Chinese; English
• Published: 01.04.2022
• Subjects: ACYCLIC OR CARBOCYCLIC COMPOUNDS; CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; CHEMISTRY; METALLURGY; ORGANIC CHEMISTRY; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; THEIR RELEVANT APPARATUS; TRANSPORTING

The invention discloses a method for catalytically synthesizing methyl sorbate based on a deep eutectic solvent (MSA-DES). The deep eutectic solvent MSA-DES can be prepared by mixing, heating and stirring choline chloride and methanesulfonic acid until clear liquid is obtained; sorbic acid and absolute methanol are stirred for 2-5 h at a certain temperature for an esterification reaction, and methyl sorbate is obtained through the processes of liquid separation, reduced pressure distillation, normal pressure distillation and the like. Compared with traditional inorganic acid catalyst catalysis, the method has the advantages that the technological process is simple, side reaction and waste liquid are avoided, the catalyst can be recycled, time and cost are saved, and the method can be used for industrial production and has wide application prospects. 本发明公开了一种基于低共熔溶剂（MSA-DES）催化合成山梨酸甲酯的方法。通过将氯化胆碱和甲磺酸混合加热搅拌至澄清液体即可制备所得低共熔溶剂MSA-DES；山梨酸和无水甲醇在一定温度下搅拌2~5 h进行酯化反应，并经过分液、减压蒸馏和常压蒸馏等过程获得山梨酸甲酯。该方法与传统的无机酸催化剂催化相比，它的优势体现在：其工艺流