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Continuous reaction rectification process and rectification equipment for synthesizing isopropyl alcohol

The technology of reactive distillation and reactive distillation column is applied in the field of continuous reactive distillation process for synthesizing isopropanol, which can solve the problems of high operating pressure of hydrogenation reaction, expensive catalyst, difficult regeneration, etc., and achieves reduction of material consumption and convenient equipment. Operation, good product quality effect

Active Publication Date: 2012-10-31
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above method uses a fixed bed reactor for continuous operation, but there are still some disadvantages: the operating pressure of the hydrogenation reaction is too high (1.0~1.5MPa), the temperature is high (100~150°C), and the catalyst is expensive and difficult to regenerate, etc.

Method used

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  • Continuous reaction rectification process and rectification equipment for synthesizing isopropyl alcohol

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Experimental program
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Effect test

Embodiment 2

[0072] Attached figure 1 In the process flow shown, the material of the reactive distillation tower body is SUS304, and the rectification section, stripping section, and reaction section are filled with CY700 packing respectively. The number of theoretical plates in the rectification section is 12, and the number of theoretical plates in the reaction section is 25. The theoretical plate number of the stripping section is 5; the body material of the methyl ester rectifying tower is SUS304, and the tower is filled with CY700 packing, the rectifying section is 12 pieces, and the stripping section is 16 pieces. The body material of the methanol rectification tower is SUS304, and the column is filled with CY700 packing. The rectification section is 24 pieces, and the stripping section is 18 pieces; It is 25 pieces, and the stripping section is 15 pieces.

[0073] The operating conditions of the reactive distillation column are: the operating absolute pressure is 1 atm, and the iso...

Embodiment 3

[0082] Attached figure 1 In the process flow shown, the material of the reactive distillation tower body is SUS304, and the rectification section, stripping section, and reaction section are filled with CY700 packing respectively. The number of theoretical plates in the rectification section is 14, and the number of theoretical plates in the reaction section is 28. The theoretical plate number of the stripping section is 5; the body material of the methyl ester rectifying tower is SUS304, and the tower is filled with CY700 packing, the rectifying section is 14 pieces, and the stripping section is 15 pieces. The body material of the methanol rectification tower is SUS304, and the column is filled with CY700 packing. The rectification section is 22 pieces, and the stripping section is 20 pieces; It is 22 blocks, and the stripping section is 16 blocks.

[0083] The operating conditions of the reactive distillation column are: the operating absolute pressure is 1 atm, and the iso...

Embodiment 4

[0092] Attached figure 1In the process flow shown, the material of the reactive distillation tower body is SUS304, and the rectification section, stripping section, and reaction section are filled with CY700 packing respectively. The number of theoretical plates in the rectification section is 14, and the number of theoretical plates in the reaction section is 28. The theoretical plate number of the stripping section is 5; the body material of the methyl ester rectifying tower is SUS304, and the tower is filled with CY700 packing, the rectifying section is 14 pieces, and the stripping section is 15 pieces. The body material of the methanol rectification tower is SUS304, and the column is filled with CY700 packing. The rectification section is 22 pieces, and the stripping section is 20 pieces; It is 22 blocks, and the stripping section is 16 blocks.

[0093] The operating conditions of the reactive distillation column are: the operating absolute pressure is 1 atm, and the isop...

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Abstract

The invention provides a continuous reaction rectification process that isopropyl acetate and methyl alcohol are taken as raw materials to be synthesized into isopropyl alcohol through a trans-esterification method under the existence of basic catalysts such as sodium methylate. According to the invention, a reaction rectification technology is adopted, so that the isopropyl acetate and methyl alcohol are fed from the upper part and the lower part of a reaction section of a reaction rectifying tower respectively to be reacted and separated so as to realize continuous production; and products at the top and the bottom of the reaction rectifying tower are separated and purified by a methyl ester rectifying tower, a sodium methylate rectifying tower, an evaporator and a isopropyl alcohol refining tower, so that isopropyl alcohol is obtained, and raw material and catalyst which are not reacted are recycled at the same time. The continuous reaction rectification process for synthesizing isopropyl alcohol has the characteristics of continuity in operation, low energy consumption, high reaction conversion rate and isopropyl alcohol purity, stable quality, and the like.

Description

technical field [0001] The invention belongs to the technical field of synthesizing organic compounds by transesterification, and in particular relates to a continuous reactive distillation process for synthesizing isopropanol. Background technique [0002] Isopropyl alcohol (IPA for short), as an excellent organic solvent and pharmaceutical intermediate, has been widely used in recent years. [0003] The main method of producing isopropanol at home and abroad is the propylene hydration method. According to whether intermediate products are produced, it can be divided into two methods: propylene indirect hydration method and propylene direct hydration method. The indirect hydration method, also known as the sulfuric acid esterification hydrolysis method, uses concentrated sulfuric acid to absorb propylene, and then hydrolyzes it into isopropanol. This method has the disadvantages of large sulfuric acid consumption, complicated process, low selectivity, serious equipment corr...

Claims

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Application Information

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IPC IPC(8): B01D3/14C07C31/10C07C29/80
Inventor 邱挺王红星肖丽黄智贤李玲况晨辉叶长燊
Owner FUZHOU UNIV
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