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2-alkoxy propone synthesis process

A technology of alkoxypropylene and dialkoxypropane, which is applied in the field of new synthesis process of 2-alkoxypropene, can solve the problems of high reaction pressure and easy deactivation of catalyst, and achieves high conversion rate and good selectivity , the effect of improving space-time yield and selectivity

Inactive Publication Date: 2006-07-12
ZHEJIANG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention aims at the problems of easy deactivation of catalyst and high reaction pressure in the prior art, and provides a new synthesis process of 2-alkoxypropene with high yield and content and mild operating conditions

Method used

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  • 2-alkoxy propone synthesis process
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Examples

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Effect test

Embodiment example 1

[0018] In a three-neck flask with a thermometer and a constant pressure funnel, add 101 g of ionic liquid ([Emim][HSO 4 ], 0.5mol), heated to 120°C under stirring, and dimethoxypropane was added dropwise from a constant pressure funnel at a flow rate of 52g / hour, and the pressure was controlled at 1 atm to collect 2-alkoxypropene. The yield of 2-alkoxypropene was 93.3%.

Embodiment example 2

[0020] In a three-neck flask with a thermometer and a constant pressure funnel, add 99g of ionic liquid ([Me 3 NH][H 2 PO 4 ], 0.5mol), heated to 130°C under stirring, and dimethoxypropane was added dropwise from the constant pressure funnel at a flow rate of 52g / hour, and the pressure was controlled at 1 atm to collect 2-alkoxypropene. The yield of 2-alkoxypropene was 65.8%.

Embodiment example 3-14

[0022] Example

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Abstract

The invention discloses a craft for synthesizing 2-propylene epoxy group, wherein R is methyl, ethyl, propyl, isopropyl, and butyl and so on. It is characterized in that the starting raw material 2-propylene epoxy propane uses acid ion liquid as solution and crystal to do liquid phase cracking reaction to obtain the 2-propylene epoxy group, wherein the mole rate of the 2-propylene epoxy propane and the ion liquid is 1: 0.25-1:10; the reaction temperature is 100-180 deg.; the pressure is above normal pressure below 5 normal pressure.

Description

technical field [0001] The invention relates to a new synthesis process of 2-alkoxypropene. Background technique [0002] 2-Alkoxypropene is an important pharmaceutical and chemical raw material. Because it has both double bonds and ether bonds, its chemical properties are very active. It is often used as a solvent and auxiliary agent in the paint, textile and leather industries. At the same time, it is also a key intermediate in the synthesis of medicine, food and feed. Among them, 2-methoxypropene is the most important and widely used alkenyl ether compound, which is used for the synthesis of clarithromycin, pseudoionone, ionone, isophytol, vitamin A, vitamin E, vitamin K2 and other medicines. It is a key intermediate of chemical, chemical and feed products, and has very important uses in industrial production. [0003] There are usually two techniques for synthesizing 2-alkoxypropene: acetylenic alcohol condensation and ketal cleavage. Among them, the alkyne alcohol co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C41/18C07C43/15
Inventor 李浩然王从敏郭丽萍王勇翁建阳徐林祥杨晓光
Owner ZHEJIANG UNIV