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Method for producing sec-butyl alcohol through continuous hydrolysis

A technology for catalyzed hydrolysis of sec-butanol, applied in hydrolysis preparation, separation methods, chemical instruments and methods, etc., can solve the problem of low conversion rate

Active Publication Date: 2018-04-13
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problem of low conversion rate in the existing technology for preparing sec-butanol by hydrolysis of sec-butyl acetate, the present invention provides a method for producing sec-butanol by continuous hydrolysis

Method used

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  • Method for producing sec-butyl alcohol through continuous hydrolysis
  • Method for producing sec-butyl alcohol through continuous hydrolysis
  • Method for producing sec-butyl alcohol through continuous hydrolysis

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The feed molar ratio of sec-butyl acetate to water in the reactive distillation column is 2, the reflux ratio is 2, the operating pressure is 0.2MPa, and the temperature is 100°C; the operating pressure in the vacuum distillation column is 5kPa, and the reflux ratio is 2 , The operating pressure in the pressurized rectification tower is 0.6MPa, and the reflux ratio is 2.

[0030] In this example, the hydrolysis conversion rate of sec-butyl acetate was 43.17%, the purity of sec-butanol was 99.97%, and the yield of sec-butanol was 90.82%.

Embodiment 2

[0032] The feed molar ratio of sec-butyl acetate to water in the reactive distillation column is 5, the reflux ratio is 8, the operating pressure is 0.3MPa, and the temperature is 110°C; the operating pressure in the vacuum distillation column is 10kPa, and the reflux ratio is 5 , The operating pressure in the pressurized rectification tower is 1.0MPa, and the reflux ratio is 5.

[0033] In this example, the hydrolysis conversion rate of sec-butyl acetate was 66.53%, the purity of sec-butanol was 99.97%, and the yield of sec-butanol was 94.40%.

Embodiment 3

[0035] The feed molar ratio of sec-butyl acetate to water in the reactive distillation column is 5, the reflux ratio is 10, the operating pressure is 0.5MPa, and the temperature is 120°C; the operating pressure in the vacuum distillation column is 50kPa, and the reflux ratio is 8 , The operating pressure in the pressurized rectification tower is 1.3MPa, and the reflux ratio is 8.

[0036] In this example, the hydrolysis conversion rate of sec-butyl acetate was 70.88%, the purity of sec-butanol was 99.93%, and the yield of sec-butanol was 95.07%.

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Abstract

The invention discloses a method for producing sec-butyl alcohol through continuous hydrolysis, and belongs to the field of chemical reactions and separation. The method takes the sec-butyl acetate asa main material, the sec-butyl acetate is subjected to catalytic hydrolysis in a reaction section of a reactive distillation column through a catalyst, and the high-purity sec-butyl alcohol is obtained through the oil water separation and the three-step pressure swing distillation comprising pressure reduction, pressurization and pressure reduction. The reaction rectification-pressure swing distillation coupling process is adopted to hydrolyze the sec-butyl acetate, the conversion rate of hydrolysis is high, the purity of the sec-butyl alcohol is high, and the operation condition of the reaction is mild.

Description

technical field [0001] The invention belongs to the field of chemical reaction and separation, in particular to a method for producing sec-butanol by continuous hydrolysis. Background technique [0002] S-butanol is an important chemical organic intermediate, which is mostly used as a raw material for the preparation of methyl ethyl ketone. In addition, s-butanol can also be used as a surfactant, antioxidant, herbicide, etc. At present, the industrial production method of sec-butanol is mainly n-butene catalytic hydration method, but the catalytic hydration method has problems such as large environmental pollution, low single-pass conversion rate, high energy consumption and high equipment requirements. Other methods of producing sec-butanol include hydrogenation, transesterification, hydrolysis, etc. The hydrogenation method is to use butanone or sec-butyl acetate as raw materials to prepare sec-butanol under the catalysis of supported noble metal solid catalysts, etc., bu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C31/12C07C29/09C07C29/80B01D3/14B01D3/32
CPCB01D3/143B01D3/32C07C29/095C07C29/80C07C31/12Y02P20/10
Inventor 叶长燊邱挺曾志杰孙逸民杨金杯李玲黄智贤王红星王晓达林小城杨臣陈锦溢王清莲
Owner FUZHOU UNIV
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