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Process for producing 2-methyltetrahydrofuran by kettle-type continuous hydrogenation

A technology of methyltetrahydrofuran and kettle type, which is applied in the field of continuous hydrogenation of kettle type to produce 2-methyltetrahydrofuran, can solve the problems of waste of hydrogen, air quality, low production efficiency, adverse effects, etc. The effect of reducing pollution

Active Publication Date: 2017-06-30
山东一诺生物质材料有限公司
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Problems solved by technology

[0009] In order to solve the above-mentioned technical problems, the present invention provides a process for producing 2-methyltetrahydrofuran by continuous hydrogenation in a kettle, so as to solve the problem of low production efficiency, poor safety, serious waste of hydrogen and the The problem of direct exhaust air adversely affecting air quality

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  • Process for producing 2-methyltetrahydrofuran by kettle-type continuous hydrogenation

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Embodiment

[0028] as attached figure 1 shown

[0029] Add 2000kg 2-methylfuran and 20kg Raney nickel catalyst to 3m 3 In the main reaction kettle, add 1500kg2-methyltetrahydrofuran and 10kg palladium carbon catalyst into 2m 3 In the auxiliary reactor, replace it with nitrogen and hydrogen three times respectively, control the temperature in the main reactor to 90°C, and the pressure to 5.5-6.0MPa. 2-Methylfuran is pumped into the main reactor at a rate of 650-850kg / h through the metering pump to continue the hydrogen reaction. The flow self-regulating valve of the gas-liquid separator opens the discharge valve, and the reaction liquid passes through the filter in the kettle and is pressed into the gas-liquid separator. After the filtrate in the gas-liquid separator reaches a certain level, the magnetic flap liquid level gauge The discharge self-regulating valve at the bottom of the gas-liquid separator linked with it is automatically opened, and enters the crude product receiving tank...

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Abstract

The invention provides a process for producing 2-methyltetrahydrofuran by kettle-type continuous hydrogenation. The process includes the steps: storing, metering and inputting the 2-methyltetrahydrofuran; enabling materials to enter a main reaction kettle for hydrogenation reaction; enabling the materials to enter an auxiliary reaction kettle for hydrogenation reaction; enabling the materials to enter a gas-liquid separator for gas-liquid separation; receiving a crude product; performing rectification to obtain a finished product. According to the process, reactions are performed by a kettle-type continuous liquid phase hydrogenation method, treatment links before and after each kettle are decreased, time is greatly shortened, and efficiency is improved. Besides, as the materials do not need to be treated by each kettle, the contacting chance of the materials with catalysts and air is decreased, reaction safety is greatly improved, hydrogen in reaction can be recycled, hydrogen loss is greatly reduced, and air pollution caused by emission of hydrogen waste gas in air is reduced.

Description

technical field [0001] The invention belongs to the technical field of chemical synthesis, and in particular relates to a process for producing 2-methyltetrahydrofuran through kettle-type continuous hydrogenation. Background technique [0002] 2-Methyltetrahydrofuran is a raw material and solvent for organic synthesis, mainly used as a solvent for resins, natural rubber, ethyl cellulose and chloroacetic acid-vinyl acetate copolymer; using it to extract aliphatic acids is more expensive than the commonly used It is a good solvent with low boiling point; it can also be used as an initiator in the polymerization process of ethylene derivatives or butadiene, and it can also be used to produce 1,3-pentadiene; it is also very important in the uranium smelting industry. 2-Methyltetrahydrofuran is also a raw material in the pharmaceutical industry and can be used in the synthesis of antihemorrhoids such as primaquine phosphate. 2-Methyltetrahydrofuran is partially soluble in water,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D307/06B01J19/00
CPCB01J19/0046B01J2219/0072C07D307/06Y02A50/20
Inventor 王运生刘占杰李敬强
Owner 山东一诺生物质材料有限公司