Preparation method of 2-methyl furan

Abstract

The invention discloses a preparation method of 2-methyl furan, comprising the following steps of: allowing gaseous furfural to contact with hydrogen in a hydrogenation reactor to carry out hydrogenation reaction in the presence of a hydrogenation catalyst under the condition of selective hydrogenation reaction, condensing a reaction product and separating an organic phase from a water phase, and sending the organic phase into a rectifying tower for rectification to obtain 2-methyl furan, wherein at least parts of heat discharged during the hydrogenation reaction process through heat exchange is taken as the heat source of the column bottom of the rectifying tower. According to the method, parts of heat discharged from the hydrogenation reactor is used to provide heat source for a reboiler of the rectifying tower, and preferably parts of heat discharged from the hydrogenation reactor is also used as the heat source for heating and vaporization of the liquid phase furfural raw material and for heating of gaseous furfural and hydrogen, thus making the removed heat form a heat circulatory system. In comparison with traditional external steam or externally introduced heating mode, the preparation method provided by the invention is more energy-saving, and heat recycling is more reasonable.

Description

technical field [0001] The invention relates to a preparation method of 2-methylfuran. Background technique [0002] 2-Methylfuran (hereinafter referred to as 2-MEF) is an important organic compound and an intermediate in pharmaceutical synthesis. It is widely used in the fields of medicine, pesticides and polymers. 2-Methyltetrahydrofuran obtained after hydrogenation of 2-methylfuran It is also an important organic solvent in the chemical industry. With the development of medicine and pesticide fields at home and abroad, the demand for 2-methylfuran products has increased sharply, and the market prospect of this product is broad. However, the market competition is becoming increasingly fierce, and it is imperative to save energy, reduce emissions and reduce unit consumption. [0003] The heat generated in the 2-methylfuran production unit mainly comes from the hydrogenation reactor. Most companies at home and abroad use heat transfer oil to remove the heat released by the ...

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Problems solved by technology

[0003] The heat generated in the 2-methylfuran production unit mainly comes from the hydrogenation reactor. Most companies at home and abroad use heat transfer oil to remove the heat released by the hydrogenation reactor, and then remove the heat from the heat transfer oil in various ways. Different companies also have their own characteristics in the treatment of this heat. Some companies use part of the heat in the heat transfer oil to heat the gas at the inlet of the reactor, and the rest of the heat is taken away by circulating water. Some companies convert the heat into low-pressure The steam is used for other purposes, but due to multiple changes, the heat utilization rate is not high. Some companies use air cooling or water cooling to remove the heat, and some companies convert the heat released by the reactor into hot water; In short, the heat released by the hydrogenation reactor will be lost in a large amount or the utilization rate is low, which eventually leads to relatively high energy consumption for the production of 2-methylfuran products

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