Preparation method and device of methyl myristate

Abstract

The invention provides a preparation method and device of methyl myristate. The preparation method comprises the following steps: mixing and stirring tetradecanoic acid and methanol according to a molar ratio of 1: (2-6) to form a mixture, heating the mixture to 50-60 DEG C, and adding a solid acid catalyst accounting for 10-30 wt% of the mass of the mixture for esterification reaction. Accordingto the preparation method, the solid acid catalyst is used for replacing a liquid acid catalyst, the specific surface area and the pore volume of the solid acid catalyst are large, good selectivity and reaction activity are ensured, a product is easy to separate and purify, the solid acid catalyst can be repeatedly used for multiple times, equipment corrosion and environmental pollution are avoided, and continuous production of enterprises can be achieved; and under the specific condition of the catalyst accounting for 10-30 wt% of the mass of the mixture, the reaction efficiency is improved,the side reaction is inhibited, the conversion rate of the product reaches 97.8-99.7%, and the yield of the final product methyl myristate is increased.

Description

technical field [0001] The invention relates to the field of preparation of methyl myristate, in particular to a method and a device for preparing methyl myristate. Background technique [0002] Due to the depletion of traditional non-renewable diesel and the increase of anthropogenic greenhouse gas emissions, biodiesel is considered as a promising alternative energy source and has received extensive attention in recent years. As one of the main components of biodiesel, methyl myristate has the advantages of high cetane number, high flash point, good emission characteristics, renewability and excellent biodegradability, and is regarded as a promising diesel additives and fuel substitutes. In addition to being used for biodiesel, methyl myristate can also be used in edible flavors such as honey and coconut, as well as daily flavors, and can also be used in the preparation of organic chemicals. Therefore, as an important fatty acid methyl ester, methyl myristate has great ap...

AI Technical Summary

Problems solved by technology

[0003] At present, the industrial production of methyl myristate generally uses myristic acid and methanol as raw materials, and concentrated sulfuric acid as a catalyst for esterification reaction. Concentrated sulfuric acid has a relatively high activity, but it has serious equipment corrosion and is difficult to continuously produce. , strict acidity requirements, serious environmental pollution and other disadvantages, and the product is difficult to separate and purify, and there are many by-products, which greatly reduces the yield

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