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Separation method of mixed solvent containing 2-methyltetrahydrofuran, methanol and water

A technology of methyl tetrahydrofuran and mixed solvents, applied in the separation of mixed solvents of methanol and water, containing 2-methyl tetrahydrofuran, can solve problems such as difficult removal

Pending Publication Date: 2022-04-29
FUQING BRANCH OF FUJIAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, it is difficult to remove methanol and water in the mixed solvent by ordinary rectification, and separation techniques such as special rectification are required

Method used

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  • Separation method of mixed solvent containing 2-methyltetrahydrofuran, methanol and water

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Experimental program
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Effect test

Embodiment 1

[0036] The extractive distillation column T1 is made of SUS304, filled with 752Y plate corrugated packing, the column diameter is 400mm, and the number of theoretical plates is 32. The extraction agent is fed from the 6th theoretical plate, and the mixed solvent to be separated is fed from the 6th theoretical plate 24 theoretical trays are fed; the material of the azeotropic distillation column T2 is SUS304, and the column is filled with 752Y specification plate corrugated packing, the column diameter is 300mm, the number of theoretical trays is 20, and the material is fed from the 8th theoretical tray. The material of the methanol refining tower T3 is SUS304. The tower is filled with 752Y plate corrugated packing. The diameter of the tower is 400mm and the number of theoretical plates is 30. The material is fed from the 20th theoretical plate.

[0037]The mixed solvent to be separated enters from the lower feed port of the extractive distillation tower T1, the feed flow rate i...

Embodiment 2

[0040] The extractive distillation column T1 is made of SUS304, filled with 752Y plate corrugated packing, the column diameter is 400mm, and the number of theoretical plates is 32. The extraction agent is fed from the 6th theoretical plate, and the mixed solvent to be separated is fed from the 6th theoretical plate 24 theoretical trays are fed. The material of the azeotropic distillation column T2 is SUS304, the column is filled with 752Y specification plate corrugated packing, the column diameter is 300mm, the number of theoretical plates is 20, and the material is fed from the 8th theoretical plate. The material of the methanol refining tower T3 is SUS304. The tower is filled with 752Y plate corrugated packing. The diameter of the tower is 400mm and the number of theoretical plates is 30. The material is fed from the 20th theoretical plate.

[0041] The mixed solvent to be separated enters from the lower feed port of the extractive distillation tower T1, the feed flow rate i...

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Abstract

The invention relates to a method for separating a mixed solvent containing 2-methyltetrahydrofuran, methanol and water, which comprises the following steps of: feeding deionized water as an extracting agent and a to-be-separated mixed solvent into an extractive distillation tower, condensing a gas phase at the top of the tower, and feeding into a layering device of the extractive distillation tower for phase separation; an oil phase, namely a 2-methyltetrahydrofuran crude product, is sent to an azeotropic rectifying tower for 2-methyltetrahydrofuran purification, a methanol crude product obtained in the tower kettle of the extractive rectifying tower is sent to a methanol refining tower for methanol purification, and a methanol product is obtained from the tower top. Condensing a gas phase at the top of the azeotropic rectifying tower, feeding the condensed gas phase into a layering device of the azeotropic rectifying tower for phase splitting, returning an oil phase as reflux to the azeotropic rectifying tower, and obtaining a 2-methyltetrahydrofuran product at a tower kettle; through combination of the extractive distillation tower, the azeotropic distillation tower and phase separation operation, separation of the mixed solvent containing 2-methyltetrahydrofuran, methanol and water is realized, the method has the advantages of high recovery purity, low energy consumption and the like, and meanwhile, the existing deionized water in the solvent is taken as an extraction agent, so that influence on use of the recovered solvent caused by introduction of a third component is avoided.

Description

technical field [0001] The invention relates to the field of chemical solvent separation, in particular to a separation method for a mixed solvent containing 2-methyltetrahydrofuran, methanol and water. Background technique [0002] Prothioconazole is a new type of broad-spectrum triazolethione fungicide, mainly used to prevent and control diseases of cereals, wheat and beans and other crops. It has good biological and ecological toxicity, low toxicity, and no teratogenic or carcinogenic Mutant type, non-toxic to embryos, safe to human body and environment, etc., have been widely used. [0003] 2-Chloro-a-(1-chlorocyclopropyl)-a-(chloromethyl)-phenethyl alcohol (TM-5 for short) is one of the important intermediates for the synthesis of prothioconazole, its molecular formula: C 12 h 13 Cl 3 O, molecular weight: 279.59, CAS: 134818-67-0. TM-5 uses o-chlorobenzyl chloride and metal magnesium as raw materials, firstly prepares Grignard solution through Grignard reaction, and...

Claims

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Application Information

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IPC IPC(8): C07D307/06C07C29/82C07C29/84C07C29/80C07C31/04
CPCC07D307/06C07C29/82C07C29/84C07C29/80C07C31/04
Inventor 陈锦溢杨金杯余美琼陈玉
Owner FUQING BRANCH OF FUJIAN NORMAL UNIV
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