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Method for controlling acid value in acrylic ester synthesis

A technology of acrylate and acrylic acid, applied in the field of acrylate synthesis, can solve problems such as waste of manpower, material resources, financial resources, unsolvable phenomena, inability to recycle, remedy, and process, and achieve the effect of good product quality and high yield

Inactive Publication Date: 2011-04-20
TIANJIN CHEM REAGENT RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] Acrylate series products are widely used in UV coatings, leather processing, electronic printing and radiation curing additives, etc., and have a good prospect. At the same time, UV coatings also have broad application prospects in new energy fields such as solar cells and photovoltaic cells. With the expansion, the demand for products has also increased. In the synthesis process of this series of products, there have always been problems. It is also impossible to make back, remedy, and deal with it, thus causing a great waste of manpower, material resources, and financial resources.

Method used

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  • Method for controlling acid value in acrylic ester synthesis
  • Method for controlling acid value in acrylic ester synthesis

Examples

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Effect test

Embodiment 1

[0023] (1), raw material acrylic acid, toluene, catalyst and polymerization inhibitor are added in reactor and carry out esterification reaction, measure reaction liquid acid value, acid value is controlled at 29mgKOH / g;

[0024] (2), add toluene, salt water and wash with water, measure the acid value of the reaction solution after washing, and the acid value is controlled at 13mgKOH / g;

[0025] (3), add alkaline water to wash, measure the acid value of the reaction solution, the acid value is controlled at 4.8mgKOH / g;

[0026] (4), continue washing with alkaline water until the acid value is 0.2mgKOH / g and stop washing;

[0027] (5), vacuum distillation, removal of solvent, and suction filtration to obtain the finished acrylate.

Embodiment 2

[0029] (1), raw material acrylic acid, toluene, catalyst and polymerization inhibitor are added in reactor and carry out esterification reaction, measure reaction liquid acid value, acid value is controlled at 28mgKOH / g;

[0030] (2), add toluene, salt water and wash with water, measure the acid value of the reaction solution after washing, and the acid value is controlled at 13mgKOH / g;

[0031] (3), add alkaline water to wash, measure the acid value of the reaction solution, the acid value is controlled at 5.1mgKOH / g;

[0032] (4), continue washing with alkaline water until the acid value is 0.2mgKOH / g and stop washing;

[0033] (5), vacuum distillation, removal of solvent, and suction filtration to obtain the finished acrylate.

Embodiment 3

[0035] (1), raw material acrylic acid, toluene, catalyst and polymerization inhibitor are added in reactor and carry out esterification reaction, measure reaction liquid acid value, acid value is controlled at 29mgKOH / g;

[0036] (2), add toluene, salt water and wash with water, measure the acid value of reaction solution after washing, acid value is controlled at 12mgKOH / g;

[0037] (3), add alkaline water to wash, measure the acid value of the reaction solution, the acid value is controlled at 4.8mgKOH / g;

[0038] (4), continue washing with alkaline water until the acid value is 0.15mgKOH / g and stop washing;

[0039] (5), vacuum distillation, removal of solvent, and suction filtration to obtain the finished acrylate.

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Abstract

The present invention relates to the field of acrylic ester synthesis, in particular to an acid value control in acrylic ester synthesis, which is characterized by the acid value control of the esterification and the water washing processes. The problems of stagnation in production process and the impossibility for remedying and the treating unqualified finished products may occurs in common acrylic ester synthesis process, for example, turbidity appeares during water washing process which results that the next reaction can not be carried out, so the reaction has to be stopped to wait for the clarification of the reaction solution; or polymerization appears during vacuum distillation. The present invention avoids the above problems; thereby avoids the great waste of manpower, material resources and financial resources; and achieves the products with good quality and high yield.

Description

technical field [0001] The invention relates to the field of acrylate synthesis, in particular to an acid value control method in acrylate synthesis. Background technique [0002] Acrylate series products are widely used in UV coatings, leather processing, electronic printing and radiation curing additives, etc., and have a good prospect. At the same time, UV coatings also have broad application prospects in new energy fields such as solar cells and photovoltaic cells. With the expansion, the demand for products has also increased. In the synthesis process of this series of products, there have always been problems. Also can't return system, remedy, process, therefore caused the great waste of manpower, material resources, financial resources. Contents of the invention [0003] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a method for controlling the acid value in acrylate synthesis. [0004] In order to achieve the ab...

Claims

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Application Information

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IPC IPC(8): C07C67/62C07C67/08C07C69/54
Inventor 黄峙
Owner TIANJIN CHEM REAGENT RES INST
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