Preparation method of 2-methyl furan

A technology of methyl furan and furfural, which is applied in the field of 2-methyl furan preparation, can solve the problems of low heat utilization rate, loss utilization rate, high energy consumption of 2-methyl furan products, and achieve reasonable heat recycling , The effect of low one-time investment

Active Publication Date: 2012-11-07
JIANGSU QINGQUAN CHEM CO LTD
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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 circulati

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  • Preparation method of 2-methyl furan

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preparation example Construction

[0017] The preparation method of 2-methylfuran provided by the invention comprises: under selective hydrogenation reaction conditions, in the presence of a hydrogenation catalyst, the gaseous phase furfural is contacted with hydrogen in a hydrogenation reactor to carry out a hydrogenation reaction, and the reaction The product is condensed and the organic phase and the water phase are separated, and the obtained organic phase is sent to a rectification tower for rectification to obtain 2-methylfuran, wherein at least part of the heat released during the hydrogenation reaction is taken out by heat exchange As a heat source for the distillation column.

[0018] According to the present invention, the place that generates heat in the production process of 2-methylfuran mainly comes from the large amount of heat that releases when gaseous phase furfural and hydrogen contact reaction, and in the refining process of follow-up 2-methylfuran crude product, need In the rectification to...

Embodiment 1

[0041] This example is used to illustrate the preparation of 2-methylfuran provided by the present invention.

[0042] in such as figure 1 The preparation of 2-methylfuran is carried out in the continuous reaction device shown. The furfural raw material in the liquid phase is heated to 100°C by the furfural heater E101 and then enters the furfural evaporator V101 to be vaporized into a gas. The furfural in the gas phase and the circulating hydrogen are sent to the aldehyde The hydrogen superheater E102 is heated to 140°C, and then the heated gas phase furfural and hydrogen are sent to the hydrogenation reactor R101 (shell-and-tube reactor) for hydrogenation reaction (the hydrogenation reaction temperature is 180°C, and the pressure is 0.2 MPa, the molar ratio of gaseous furfural to hydrogen is 1:16; the hydrogen space velocity is 700h -1 , the catalyst loading capacity is 5 tons), the high-temperature gas after the reaction is sent to the condenser E103 to be condensed to 5°C...

Embodiment 2

[0050] This example is used to illustrate the preparation of 2-methylfuran provided by the present invention.

[0051] in such as figure 1 Carry out the preparation of 2-methylfuran in the continuous reaction device shown, and carry out the preparation of 2-methylfuran according to the processing method of embodiment 1, difference is, with the 2-methylfuran device technology of 1000 tons / year To illustrate, the hydrogenation reaction temperature is 170°C, the pressure is 0.2MPa, the molar ratio of gaseous furfural to hydrogen is 1:20; the hydrogen space velocity is 800h -1 , the catalyst loading capacity is 2 tons; the rectifying condition: the rectifying tower T101 bottom temperature is 110 ℃, and the tower pressure is normal pressure (0.1MPa). Among them, heat transfer oil is used to provide heat source for the system, the flow rate of all heat transfer oil is 60t / h, and the pressure of the heat transfer oil delivery system is 0.2-0.4MPa.

[0052] The heat transfer oil inl...

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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 ...

Claims

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Application Information

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IPC IPC(8): C07D307/36
CPCY02P20/10
Inventor 王群郑端镛李明张浩张增礼孟令坤陈高林泮永成张美芳
Owner JIANGSU QINGQUAN CHEM CO LTD
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