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A kind of clean preparation method of 1,2-epoxybutane

A butylene oxide, clean technology, applied in 1 field, can solve problems such as potential safety hazards and separation difficulties, and achieve the effects of avoiding low boiling point, no three waste pollution, and high safety factor

Inactive Publication Date: 2016-06-29
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Patent CN101085763A discloses a method of using low-carbon alcohol, preferably methanol as solvent, hydrogen peroxide as oxidant, 1-butene as raw material, and titanium silicon molecular sieve as catalyst to synthesize 1,2-epoxybutane, although the method 1,2-epoxybutane has high selectivity, but it uses a large amount of methanol as a solvent, which not only has potential safety hazards, but also makes subsequent separation difficult because the boiling point of methanol is close to the boiling point of the product 1,2-epoxybutane

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Embodiment 1, 20.0g of dimethyl carbonate, 1.0g of 1-butene, 0.5g of hydrogen peroxide, 0.08g of sodium lauryl sulfate and 0.5g of ammonia modified titanium silicon molecular sieves are added to the reaction In the reactor, the reaction temperature was 50°C, the reaction pressure was 0.4Mpa, after 2.0 hours of reaction, sampling and analysis showed that the conversion rate of hydrogen peroxide was 87.2%, and the product yield of 1,2-epoxybutane was 93.3%.

Embodiment 2

[0017] Example 2, 50.0g of ethylene carbonate, 10.0g of 1-butene, 1.0g of hydrogen peroxide, 0.15g of alkyl glycosides and 1.2g of ammonia modified titanium silicon molecular sieves were added to the reactor, and the reaction The temperature was 60° C., the reaction pressure was 1.0 Mpa, and after 3.0 hours of reaction, sampling and analysis showed that the conversion rate of hydrogen peroxide was 88.4%, and the product yield of 1,2-epoxybutane was 93.9%.

Embodiment 3

[0018] Embodiment 3, propylene carbonate of 35.0g, the 1-butene of 5.5g, the hydrogen peroxide of 0.75g, the polyethylene glycol of 0.12g and the titanium silicon molecular sieve of 0.8g ammoniacal liquor modification are added in the reactor, react The temperature was 70°C, the reaction pressure was 0.5Mpa, and after 2.5 hours of reaction, sampling and analysis showed that the conversion rate of hydrogen peroxide was 84.6%, and the selectivity rate of 1,2-epoxybutane was 89.3%.

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PUM

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Abstract

The invention discloses a clean method for preparing 1,2-epoxybutane. The method comprises the following step: carrying out epoxidation reaction on a solvent, 1-butene, hydrogen peroxide and a surfactant in a reactor filled with a catalyst at a mass ratio of (20-50) to (1.0-10) to (0.5-1.0) to (0.08-0.15) to (0.5-1.2) under certain conditions to obtain 1,2-epoxybutane, wherein the reaction conditions are that the reaction temperature is 50-80 DEG C, the reaction pressure is 0.4-1.0MPa and the reaction time is 2-4h. The process is simple, the reaction conditions are mild, the environment friendliness is achieved, the energy consumption in separation of the product is reduced and the method can be used for industrial production.

Description

technical field [0001] The invention relates to a clean preparation method of 1,2-butylene oxide, in particular to a method for synthesizing 1,2-butylene oxide in one step by using carbonate substances as solvents. Background technique [0002] 1,2-butylene oxide (BO) is an important organic synthesis raw material, which can be used to prepare organic synthesis intermediates and polymers, for example, polyether polyols can be produced for the preparation of low-foaming detergents, disinfectants Foaming agent, release agent, etc.; 1,2-butylene oxide hydration products can be used to make plasticizers; block copolymers formed by 1,2-butylene oxide and ethylene oxide can be used for Production of non-ionic emulsifiers and demulsifiers; in addition, 1,2-butylene oxide is the best stabilizer for various chlorine solvents. [0003] At present, the methods for industrial production of 1,2-butylene oxide mainly include the chlorohydrin method and the peracetic acid method. The mai...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D303/04C07D301/12
CPCC07D301/12C07D303/04
Inventor 周建成王猛马兴军李乃旭李树强
Owner SOUTHEAST UNIV