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A benzene-free multi-component dehydrating agent for esterification reaction

A technology of esterification reaction and dehydrating agent, applied in the field of chemistry, can solve the problems of high toxicity of benzene compounds to human body, and achieve the effect of low toxicity and easy separation

Active Publication Date: 2022-03-18
山东齐鲁漆业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Compared with the prior art, this combination does not contain benzene compounds, is safe and non-toxic, and each component is insoluble or slightly soluble in water, easy to separate, and solves the problem of benzene compounds being highly toxic to the human body. And the dehydrating agent is composed of different solvents, aldehydes, ethers and esters can form intermolecular hydrogen bonds, and form intermolecular hydrogen bonds with the water molecules that need to be removed, because the intermolecular hydrogen bonds Existence will reduce the boiling point required for azeotropy and improve azeotropic efficiency

Method used

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  • A benzene-free multi-component dehydrating agent for esterification reaction

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A benzene-free multi-component dehydrating agent for esterification, specifically taking 8.6g of n-valeraldehyde, 31.6g of n-pentyl ether and 11.6g of n-butyl acetate, and mixing them uniformly.

[0018] The reactants are soybean oil fatty acid, phthalic anhydride and glycerin, the alkyd functional ratio is set at 1.2:1, respectively 100g, 148g and 92g, and the mass ratio of dehydrating agent to reactant is 0.1:1.

[0019] Put soybean oil fatty acid, glycerin, phthalic anhydride, and dehydrating agent into the reaction kettle, and pass CO 2 , heat up to reflux, raise the temperature from 160°C to 180°C at a rate of 10°C / h, and then raise the temperature to 220°C at a rate of 20°C / h to keep warm and reflux until the resin viscosity and acid value reach the specified end point indicators, then cool down, Diluted.

Embodiment 2

[0021] A benzene-free multi-component dehydrating agent for esterification, specifically taking 8.6g of n-valeraldehyde, 47.5g of n-pentyl ether and 11.6g of n-butyl acetate, and mixing them uniformly.

[0022] The reactants are soybean oil fatty acid, phthalic anhydride and glycerin, the alkyd functional ratio is set at 1.2:1, respectively 100g, 148g and 92g, and the mass ratio of dehydrating agent to reactant is 0.1:1.

[0023] Put soybean oil fatty acid, glycerin, phthalic anhydride, and dehydrating agent into the reaction kettle, and pass CO 2 , heat up to reflux, raise the temperature from 160°C to 180°C at a rate of 10°C / h, and then raise the temperature to 220°C at a rate of 20°C / h to keep warm and reflux until the resin viscosity and acid value reach the specified end point indicators, then cool down, Diluted.

Embodiment 3

[0025] A benzene-free multi-component dehydrating agent for esterification, specifically taking 8.6g of n-valeraldehyde, 31.6g of n-pentyl ether and 23.2g of n-butyl acetate, and mixing them uniformly.

[0026] The reactants are soybean oil fatty acid, phthalic anhydride and glycerin, the alkyd functional ratio is set at 1.2:1, respectively 100g, 148g and 92g, and the mass ratio of dehydrating agent to reactant is 0.1:1.

[0027] Put soybean oil fatty acid, glycerin, phthalic anhydride, and dehydrating agent into the reaction kettle, and pass CO 2 , heat up to reflux, raise the temperature from 160°C to 180°C at a rate of 10°C / h, and then raise the temperature to 220°C at a rate of 20°C / h to keep warm and reflux until the resin viscosity and acid value reach the specified end point indicators, then cool down, Diluted.

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Abstract

The invention belongs to the field of chemistry, and specifically provides a benzene-free multi-component dehydrating agent for esterification reaction. The dehydrating agent is composed of aldehydes, ethers and esters, and the volume ratio of the three is 1:2: 1~1:4:3, under the above ratio, the dehydrating agent can azeotropically remove water with the water in the esterification reaction, so as to achieve the purpose of accelerating the reaction. Compared with the prior art, this combination does not contain Benzene compounds are less toxic, and can be prepared as needed for easy operation.

Description

technical field [0001] The invention belongs to the field of chemistry and specifically provides a benzene-free multi-component dehydrating agent for esterification. Background technique [0002] The azeotropic water removal solvents that are often used in traditional industries are generally solvents such as benzene, toluene, and xylene. The azeotropes formed by these solvents and water have a low boiling point, and they are not miscible with water, so they are easy to separate and easy to recycle. The solvents are all benzene compounds, which are highly toxic. At present, benzene compounds have been identified as strong carcinogens by the World Health Organization, and they seriously damage various tissues and organs of the human body. For example, chronic benzene poisoning, benzene is irritating to the skin, eyes and upper respiratory tract. Frequent exposure to benzene can lead to allergic eczema. Long-term inhalation of benzene can lead to aplastic anemia, neurastheni...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G63/81C08G63/49
CPCC08G63/81C08G63/48
Inventor 孙亮亮孙光明武林华王庆军隋振奎丁晓东韩洪太李丽段洪东
Owner 山东齐鲁漆业有限公司
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