Preparation method of 1, 2-bis (2-(4-methoxyphenoxy)ethoxy)ethane

Abstract

The invention discloses a preparation method of 1, 2-bis (2-(4-methoxyphenoxy)ethoxy)ethane, and aims to solve the problems that in the prior art, used reactants are not environmentally friendly, theyield is low and the like. 4-methoxyphenol and triethylene glycol are used as raw materials, and the preparation method comprises the following steps: (1), stirring at 20 DEG C, adding 4-methoxyphenoland triethylene glycol into acetonitrile, adding dicyclohexylcarbodiimide, reacting for 24h at 85 DEG C, and evaporating out acetonitrile to obtain a turbid liquid 1; (2), adding dichloromethane intothe turbid liquid 1, filtering, washing for 3 times with 1M sodium hydroxide, washing twice with saturated sodium chloride, drying by anhydrous magnesium sulfate, and evaporating out dichloromethaneto obtain a yellow powdery solid 2; (3), adding ethyl ether into the yellow powdery solid 2, raising the temperature to 35 DEG C, filtering out insolubles, cooling to -15 DEG C, lowering the temperature for 4 hours, and filtering to obtain a white powdery solid, namely 1, 2-bis (2-(4-methoxyphenoxy)ethoxy)ethane. The method is mainly applied to preparation of 1, 2-bis(2-(4-methoxyphenoxy)ethoxy)ethane.

Description

technical field

[0001] The invention relates to a synthesis method of 1,2-bis(2-(4-methoxyphenoxy)ethoxy)ethane. It belongs to organic synthesis. Background technique

[0002] The ability of a solid propellant to maintain its chemical properties during storage without exceeding the allowable variation range is called chemical stability. Commonly used nitrocellulose, nitroglycerin and other nitrate-containing compounds are the main energy components in double-base and modified double-base propellants. Decomposition will release a large amount of gas and heat, and the released nitrogen oxides will accelerate the decomposition of nitrate esters and form a self-catalyzed reaction, resulting in a decrease in the mechanical properties and combustion performance of the propellant, and even vicious accidents such as combustion and explosion. Therefore, propellants containing nitrate-based components will also decompose under storage conditions, resulting in a decrease in propellan...

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