Method for synthesizing methyl oleate and epoxy methyl oleate in ion liquid medium

Abstract

The invention discloses a method for synthesizing methyl oleate and epoxy methyl oleate in ionic liquid medium, which pertains to the technical field of fine chemical synthesis. The invention adopts N-methylimidazole positive ion or ionic liquid composed of N-methyl-2-ketopyrrolidine positive ion liquid and inorganic anions as the catalyst and the medium for reaction; under normal atmosphere, oleic acid and methanol are catalyzed to react for generating methyl oleate; and the invention also adopts 1-methyl-3-n-butylimidazolium chloride ionic liquid as the reaction medium and [Bmim]W10O23 as the catalyst, and under normal atmosphere, uses the synthesized methyl oleate to carry out epoxidation reaction by being dropped with oxyful of 30 percent, thus generating the epoxy methyl oleate. Compared with the traditional catalyzing method, the invention has the advantages that: 1. the reaction temperature is low, the reaction time is short and the energy consumption is low without pollution; 2. the separation process is easier; and 3. the ionic liquid medium used in the reaction can be reused after being simply processed.

Description

technical field [0001] The invention relates to a new method for green esterification and epoxidation, in particular to a method for synthesizing methyl oleate and epoxy methyl oleate in an ionic liquid medium, and belongs to the technical field of fine chemical synthesis. Background technique [0002] Fatty acid esters are an important class of organic chemical products, which can be used as spices, solvents, extractants, plasticizers and organic intermediates. At present, researchers have been working hard to find new esterification catalysts with low reaction energy consumption and high catalytic efficiency, such as using inorganic acids (such as hydrochloric acid, hydroiodic acid, etc.), ion exchange resins, Lewis acids, superacids and heteropolyacids It is possible to prepare fatty acid ester instead of concentrated sulfuric acid. Although the above catalytic systems have made beneficial explorations for reducing and eliminating environmental pollution, these catalysts...

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Problems solved by technology

Although the above catalytic systems have made beneficial explorations for reducing and eliminating environmental pollution, these catalysts have certain limitations in terms of catalytic performance, stability, cost and operability, and have not yet been obtained in the production of fatty acid esters. widely used

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