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Method for synthesizing 1,2-epoxy butane

A technology of butylene oxide and epoxidation reaction, applied in the direction of organic chemistry, etc., can solve the problems of inability to continuously react, low selectivity of butylene oxide, etc., and achieve the effect of simple process and high cost

Active Publication Date: 2007-12-12
HUNAN CHANGLING PETROCHEM SCI & TECH DEV CO LTD +1
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  • Summary
  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that the selectivity of butylene oxide is slightly lower, and the reaction is carried out intermittently in the autoclave, and cannot be continuously reacted.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Dilute 15g of titanium-silicon molecular sieve with 10g of quartz sand and install it in a fixed-bed reactor. The mol ratio of methanol and hydrogen peroxide is 50: 1, and the mol ratio of 1-butene and hydrogen peroxide is 1: 1. Methanol and hydrogen peroxide are injected into the reactor with a metering pump respectively, and 1-butene is metered into the reactor by a mass flow meter (or with a pump into the reactor), and the three reactants react with the catalyst to synthesize 1,2-butylene oxide. Reaction conditions: the reaction temperature is 0°C, the reaction pressure is 0.5MPa, and the liquid space velocity of the reaction bed is 10h -1 . The obtained product was analyzed by chromatography, and the selectivity of 1,2-epoxybutane was 99.3%, and the conversion rate of hydrogen peroxide was 70.36%.

Embodiment 2

[0017] The modified titanium-silicon molecular sieve is installed in a slurry bed reactor, the total liquid volume is 3 liters, and the catalyst loading accounts for 5% of the total liquid volume. The molar ratio of ethanol and hydrogen peroxide is 60:1, the molar ratio of 1-butene and hydrogen peroxide is 0.5:1, the reaction conditions: the reaction temperature is 60°C, the reaction pressure is 8.5MPa, and the liquid space velocity of the reaction bed is 8.0h -1 , other steps are with embodiment 1. The obtained product was analyzed by chromatography, and the selectivity of 1,2-epoxybutane was 90.15%, and the conversion rate of hydrogen peroxide was 90.25%.

Embodiment 3

[0019] Mix 10g of titanium-silicon molecular sieve and 10g of sodium ethoxide evenly, dilute with 20g of quartz sand, and install it in a fixed-bed reactor. The molar ratio of propanol and hydrogen peroxide is 1:1, the molar ratio of 1-butene and hydrogen peroxide is 6:1, the reaction conditions: the reaction temperature is 80°C, the reaction pressure is 2.1MPa, and the liquid space velocity of the reaction bed is 0.1h -1 , other steps are with embodiment 1. The obtained product was analyzed by chromatography, and the selectivity of 1,2-epoxybutane was 75.10%, and the conversion rate of hydrogen peroxide was 99.80%.

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Abstract

The invention discloses a method for synthesizing 1, 2- epoxybutane. It comprises following steps: mixing low- carbon alcohol, 1- butene and hydrogen dioxide solution, and the molar ratio of them is (1- 60): (0.5- 10): 1, feeding them into reactor filled with catalyst, the 1- butene and hydrogen dioxide solution reacts for epoxidation and getting 1, 2- epoxybutane, the temperature for reaction is 0- 100 Deg. C, pressure is 0.5- 8.5 Mpa, the liquid air speedis 0.1- 10 h-1.The invention is characterized by simple process, environment- friendly, high selectivity of 1, 2- epoxybutane is more than 99%, feasibility for continuous production and suitability for industrial production.

Description

1. Technical field [0001] The invention relates to a method for synthesizing 1,2-epoxybutane, in particular to a method for synthesizing 1,2-epoxybutane in one step from 1-butene. 2. Background technology [0002] 1,2-butylene oxide (BO), also known as butylene oxide, is a raw material for organic synthesis, which can be used to manufacture organic synthesis intermediates and polymers, such as 1,2-butanediol, butanolamine etc. 1,2-butylene oxide can also replace acetone as a diluent for nitro paint, and has good performance. It can also be used as an antioxidant for chlorine-containing compounds, an anti-corrosion agent for the production of vinyl chloride resin, a surfactant, gasoline Additives etc. 1,2-epoxybutane is also 1,1,1-trichloroethane (CH 3 -CCl 3 ) and other stabilizers for chlorinated solvents. [0003] The main production method of 1,2-epoxybutane in the industry still adopts the chlorohydrin process, that is, the chloroalcoholization of 1-butene with hypo...

Claims

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Application Information

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IPC IPC(8): C07D301/12C07D303/04
Inventor 李华王伟林榕伟何驰剑伍小驹高计皂佘喜春
Owner HUNAN CHANGLING PETROCHEM SCI & TECH DEV CO LTD
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