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Method for catalyzing alochol acid esterization by sulfonic-acid-radical functionized ion liquid

A technology for catalyzing alkyd esters and ionic liquids, applied in chemical instruments and methods, physical/chemical process catalysts, organic compound/hydride/coordination complex catalysts, etc. Insufficient stability and other problems, to achieve the effect of low vapor pressure, reduced total production cost, and high purity

Inactive Publication Date: 2007-08-29
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Deng Youquan et al. (CN1247856) used ionic liquids composed of nitrogen-containing heterocompounds such as alkylpyridines and pyrimazoles and metal or non-metallic halides as catalysts and solvents to realize alkyd esterification reactions. Shortcomings such as insufficient stability of air, repeated use stability; He Mingyuan et al. 4 , Fang Yanxiong, etc. (CN1880295) used N-alkyl or alkenyl-substituted pyrrolidone as a cationic ionic liquid as a catalyst and solvent for the esterification of alcohols, and successively realized the esterification of alcohols and acids

Method used

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  • Method for catalyzing alochol acid esterization by sulfonic-acid-radical functionized ion liquid
  • Method for catalyzing alochol acid esterization by sulfonic-acid-radical functionized ion liquid

Examples

Experimental program
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Effect test

Embodiment 1

[0025] Embodiment 1: Weigh 0.1 mol of acetic acid, 0.1 mol of methanol, and 0.05 mol of ionic liquid N-(3-sulfonic acid) propylpyrrolidone bisulfate; add the ionic liquid, methanol, and acetic acid in sequence with a stirrer and a thermometer , in a round-bottomed flask with a reflux condenser, magnetically stirred, and heated to reflux at 40°C for 1 hour; stand for stratification, and take the upper esterification product, the conversion rate is 71.2%, and the selectivity is 100%; the ionic liquid is vacuum-treated Dehydrate and reuse.

Embodiment 2

[0026] Embodiment 2: Weigh 0.1mol of acetic acid, 0.1mol of ethanol, and 0.02mol of ionic liquid N-(3-sulfonic acid group) propylpyrrolidone bisulfate; add the ionic liquid, ethanol, and acetic acid in sequence with a stirrer and a thermometer , in a round-bottomed flask with a reflux condenser, magnetically stirred, and heated to reflux at 80°C for 0.5 hours; stand for stratification, and take the upper esterification product, the conversion rate is 91.1%, and the selectivity is 100%; the ionic liquid is vacuum-treated Dehydrate and reuse.

Embodiment 3

[0027] Embodiment three: take by weighing 0.1mol of acetic acid, 0.1mol of n-butanol, and 0.01mol of ionic liquid N-(3-sulfonic acid group) propylpyrrolidone bisulfate; add the ionic liquid, n-butanol, and acetic acid successively with Stirrer, thermometer, reflux condenser in a round-bottomed flask, and magnetically stirred at 100 ° C for 1 hour; stand for stratification, transfer the upper esterification product, the conversion rate is 82.5%, and the selectivity is 100%; ionic liquid It can be reused after vacuum dehydration.

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Abstract

The invention relates to a hydroxy acid esterification method that is catalyzed by sulfonic group ion liquid. It adopts alpha-pyrrolidone positive ion that is sulfonic functionalized and ion liquid formed by inorganic or organic ion as catalyst, solvent, and dehydrating agent, the ion liquid quantity is 10-200% mol ratio of alcohol and acid, taking 0.5-8 hours reaction at 40-140 degree centigrade to gain ester. The method has the advantages of high selective, hig universality, and the ester could be automatically separated with catalyst.

Description

technical field [0001] The invention relates to an organic chemical reaction method, in particular to a method for catalyzing alkyd esterification with a sulfonic acid functionalized ionic liquid. Background technique [0002] Carboxylate compounds have a wide range of industrial uses, many of which are important chemical and chemical products. Traditional alkyd esterification technology usually uses strong corrosive inorganic acids such as concentrated sulfuric acid as a catalyst, which has problems such as low selectivity, colored products, difficulty in separation from products, corrosion of equipment and pollution of the environment, so it has environmental benefits for development in industry The demand for a new type of alkyd esterification system with economic benefits is extremely urgent. Ionic liquids in a liquid state at room temperature are new materials that have attracted much attention in recent years. They have the advantages of good stability, non-volatility...

Claims

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Application Information

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IPC IPC(8): C07C67/08B01J31/04
Inventor 黄宝华汪艳飞方岩雄赵肃清张焜黎子进杜志云史娜周蓓蕾
Owner GUANGDONG UNIV OF TECH
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