Catalyst for synthesizing trioctyl trimellitate from trimellitic anhydride or trimellitic acid and octanol through esterification and application thereof

A technology of trioctyl trimellitate and trimellitic anhydride, which is applied in the field of catalysts and its applications, can solve the problems of not meeting the industrial policy requirements of energy saving and emission reduction in the chemical industry, environmental pollution, etc., achieve good catalytic effect, simplify post-processing procedures, light color effect

Active Publication Date: 2013-04-03
JIANGSU ZHENGDAN CHEM IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the synthesis method of trioctyl trimellitate in the prior art, Lewis acid is generally used as a catalyst, such as sulfuric acid, tetrabutyl titanate, etc., as a catalyst, so that the synthesis process needs to be neutralized and washed to remove the The acid or hydrolysis removes the titanate, resulting in a large amount of waste water in the production process, which pollutes the environment and does not meet the national industrial policy requirements for energy conservation and emission reduction in the chemical industry.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Add trimellitic anhydride, octanol and SnO into the esterification reaction kettle, control the reaction temperature at 160°C, stir and reflux for 4 hours, and synthesize trioctyl trimellitate through esterification. The trimellitic anhydride:octanol molar ratio is 1:3.5, The amount of catalyst used is 0.1% of the total mass of the reaction raw materials, and the binary azeotrope formed by the water generated in the esterification process and excessive octanol is removed from the esterification reaction system, so that the esterification reaction is continuously carried out in the direction of positive reaction, when trimellitic anhydride When the conversion rate is higher than 99.5%, and the acid value of the neutralization titration measurement system is 0.05mgKOH / g, the esterification reaction is completed, the SnO is removed by filtration, and the octanol is removed from the esterified product under vacuum, and the vacuum degree is 0.08MPa. Trioctyl trimellitate was ...

Embodiment 2

[0015] trimellitic anhydride, octanol and ZrO 2 Add it into the esterification reaction kettle, control the reaction temperature at 180°C, stir and reflux for 3 hours, and synthesize trioctyl trimellitate through esterification reaction. The molar ratio of trimellitic anhydride to octanol is 1:3.9, and the amount of catalyst used is the total amount of reaction raw materials. 0.15% of the mass, the binary azeotrope formed by the water generated in the esterification process and excessive octanol is removed from the esterification reaction system, so that the esterification reaction continues to the positive reaction direction, when the conversion rate of trimellitic anhydride is higher than 99.5 %, neutralization titration measurement system acid value is 0.04mgKOH / g when the end of the esterification reaction, filter to remove ZrO 2 , remove octanol from the esterification product under vacuum, the vacuum degree is 0.05MPa, and trioctyl trimellitate can be obtained. Trioctyl...

Embodiment 3

[0017] Trimellitic acid, octanol, TiO 2 Add ZnO and ZnO into the esterification reaction kettle, control the reaction temperature at 200 ° C, stir and reflux for 8 hours, and synthesize trioctyl trimellitate through esterification reaction. The molar ratio of trimellitic acid: octanol is 1: 4.0, and the catalyst The amount used is 0.2% of the total mass of the reaction raw materials, and the binary azeotrope formed by the water generated in the esterification process and excessive octanol is removed from the esterification reaction system, so that the esterification reaction is continuously carried out in the direction of the positive reaction. The conversion rate of the triacid is higher than 99.5%, and the esterification reaction is completed when the acid value of the neutralization titration measurement system is 0.03mgKOH / g, and the TiO is removed by filtration. 2 and ZnO, remove octanol from the esterification product under vacuum, and the vacuum degree is 0.1MPa, and th...

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Abstract

The invention discloses a catalyst for synthesizing trioctyl trimellitate from trimellitic anhydride or trimellitic acid and octanol through esterification and application thereof. The catalyst is a solid oxide and has excellent catalytic effect so that prepared trioctyl trimellitate is shallow in color and has high volume resistance. Furthermore, as the catalyst is a non-acid catalyst, no neutralizing water washing operation is needed in the production process; therefore, the posttreatment procedure is simplified; no wastewater is discharged in the production process and no pollution is caused on the environment; and the production process is clean and meet the national related industrial policy requirements for energy saving and emission reduction of the chemical engineering industry.

Description

technical field [0001] The invention relates to a catalyst and its application, belonging to the technical field of catalysts. Background technique [0002] Trioctyl trimellitate is a plasticizer with excellent performance. Compared with phthalate plasticizers, it has the advantages of high flash point, low volatility, resistance to solvent extraction, small migration, and large molecular weight. At the same time, due to the high volume resistivity of trioctyl trimellitate and its excellent compatibility with polymers, especially polyvinyl chloride materials, it can not only be used as a general-purpose plasticizer, but also widely used in 105°C cables Materials, 125 ℃ cable materials, automotive interior materials, medical devices and polyvinyl chloride and other materials, so it has broad application prospects. However, in the synthesis method of trioctyl trimellitate in the prior art, Lewis acid is generally used as a catalyst, such as sulfuric acid, tetrabutyl titanate,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/14B01J21/06B01J23/06B01J23/755C07C69/76C07C67/08
Inventor 曹正国潘鹤林任伟王福
Owner JIANGSU ZHENGDAN CHEM IND CO LTD
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