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Hydrogen peroxide oxidized butylene to produce butylene oxide method

A technology of butylene oxide and butylene oxide, which is applied in the direction of organic chemistry to achieve the effects of ensuring continuous production, solving crystallization blockage, and good application effects

Active Publication Date: 2022-04-05
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The tubular fixed-bed reactor adopts circulating hot water to effectively and timely remove the heat of reaction. This process can effectively control the reaction temperature and the temperature rise of the reactor within a reasonable range, reduce the occurrence of side reactions, such as reducing the decomposition of hydrogen peroxide to produce oxygen, and improving the efficiency of the device. Safety, reduce safety risks, the conversion rate of hydrogen peroxide is greater than 96.0%, the selectivity of butylene oxide is higher than 97.5%; the output product of the reactor is sent to the butene recovery tower, and the top gas of the butene recovery tower is mixed with antifreeze , into the condenser, which can effectively solve the problem of crystallization blockage in the condenser and reflux tank, and realize continuous and safe production of the device

Method used

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  • Hydrogen peroxide oxidized butylene to produce butylene oxide method
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Examples

Experimental program
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Effect test

Embodiment 1

[0041] According to attached figure 1 In the illustrated embodiment, the concentration of hydrogen peroxide is 50%, the reaction pressure of the tubular fixed-bed reactor is 1.0 MPaG, the inlet temperature is 30°C, and the outlet temperature is 35°C. The molar ratio of 1-butene and hydrogen peroxide is 0.6:1. The molar ratio of methanol to hydrogen peroxide is 11.5:1.

[0042] Conversion of hydrogen peroxide = 97.0%, selectivity of butylene oxide = 97.5%.

[0043] The operating pressure of the butene recovery tower is 0.005 MPaG, the refrigerant is methanol, the amount added is 50% of the water content in the overhead gas of the butene recovery tower, the operating temperature of the tower top is -1°C, and the operating temperature of the tower bottom is 64°C.

[0044] During the operation of the device, the pressure at the top of the butene recovery tower remained stable, no condenser or pipe blockage occurred, and the product quality was stable. The yield of butene was 99....

Embodiment 2

[0046] According to attached figure 1 In the illustrated embodiment, the concentration of hydrogen peroxide is 50%, the reaction pressure of the tubular fixed-bed reactor is 1.4MPaG, the inlet temperature is 30°C, and the outlet temperature is 35°C. The molar ratio of 1-butene and hydrogen peroxide is 0.6:1. The molar ratio of methanol to hydrogen peroxide is 11.5:1.

[0047] Conversion of hydrogen peroxide = 99%, selectivity of butylene oxide = 98.5%.

[0048] The operating pressure of the butene recovery tower is 0.005 MPaG, the refrigerant is methanol, the amount added is 50% of the water content in the overhead gas of the butene recovery tower, the operating temperature of the tower top is -1°C, and the operating temperature of the tower bottom is 64°C.

[0049] During the operation of the device, the pressure at the top of the butene recovery tower remained stable, no condenser or pipe blockage occurred, and the product quality was stable. The yield of butene was 99.6%,...

Embodiment 3

[0051] According to attached figure 1 In the illustrated embodiment, the concentration of hydrogen peroxide is 50%, the reaction pressure of the tubular fixed-bed reactor is 1.4MPaG, the inlet temperature is 34°C, and the outlet temperature is 39°C. The molar ratio of 1-butene and hydrogen peroxide is 1.0:1. The molar ratio of methanol and hydrogen peroxide is 10.5:1.

[0052] Conversion of hydrogen peroxide = 98%, selectivity of butylene oxide = 98.0%.

[0053] The operating pressure of the butene recovery tower is 0.005 MPaG, the refrigerant is methanol, the amount added is 50% of the water content in the overhead gas of the butene recovery tower, the operating temperature of the tower top is -1°C, and the operating temperature of the tower bottom is 64°C.

[0054] During the operation of the device, the pressure at the top of the butene recovery tower remained stable, no condenser or pipe blockage occurred, and the product quality was stable. The yield of butene was 99.6%...

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Abstract

The invention relates to a method for producing butylene oxide by oxidizing butylene with hydrogen peroxide. The invention uses hydrogen peroxide and 1-butene to react to produce 1,2-butene oxide, adopts a tubular fixed-bed reactor, circulates hot water to remove reaction heat in time and effectively, controls the reaction temperature, reduces the occurrence of side reactions, and improves the device Safety, the conversion rate of hydrogen peroxide is greater than 96.0%, and the selectivity of butylene oxide is higher than 97.5%; the output product of the reactor is sent to the butene recovery tower, and the top gas of the butene recovery tower is mixed with antifreeze, and sent to the condensation The device can effectively solve the crystallization blockage problem of the condenser and the reflux tank, and realize the continuous and safe production of the device.

Description

technical field [0001] The invention relates to the field of butylene oxide production, in particular to a process for producing 1,2-butene oxide by reacting 1-butene and hydrogen peroxide. Background technique [0002] Butylene oxide (1,2-butylene oxide, referred to as BO) is a homologue with ethylene oxide (EO) and butylene oxide (PO). It is a substance with a three-membered ring structure. Lively, it is mainly used as an intermediate for polyether polyol monomers and other synthetic materials. BO can also be used to make foam plastics, synthetic rubber, non-ionic surfactants, polyether cell openers, high-end lubricating oil additives, etc. It can also replace acetone as a diluent for nitro paint, and can also be used as a solvent for chromatographic analysis. standard material. [0003] BO has developed rapidly since it was developed in the 1970s. For example, in the 1980s and 1990s in the United States, it increased at a rate of 10% every year. At present, there are t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D301/12C07D303/04
Inventor 杨卫胜胡松李晗翟仲曦刘银川
Owner CHINA PETROLEUM & CHEM CORP
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