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High-efficiency esterification method of trioctyl trimellitate

A technology of trioctyl trimellitate and trimellitic anhydride, which is applied in the field of efficient esterification of trioctyl trimellitate, can solve the problems of long esterification time, incomplete esterification, low conversion rate and the like, and achieves improved esterification. effect, shortened esterification time, good quality effect

Inactive Publication Date: 2018-09-28
JIANGSU ZHENGDAN CHEM IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The invention provides a high-efficiency esterification method of trioctyl trimellitate to overcome the problems of incomplete esterification, low conversion rate and too long esterification time in the existing production of trioctyl trimellitate

Method used

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  • High-efficiency esterification method of trioctyl trimellitate
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Embodiment 1

[0062]A kind of high-efficiency esterification method of plasticizer trioctyl trimellitate, described high-efficiency esterification method comprises the following steps: S1, put trimellitic anhydride and octanol into the high-efficiency esterification reactor in molar ratio for pre-mixing, Under the conditions of stirring and nitrogen blanketing, preheat to 120-150°C, the absolute pressure is 0.04-0.3MPa, and the slow stirring speed is 35r / min; S2, after trimellitic anhydride is completely dissolved in octanol, raise the temperature to 150-180 After ℃, add a mass ratio of liquid inorganic acid ester catalyst to carry out catalytic esterification reaction; S3, the esterification liquid is from the bottom of the high-efficiency esterification reactor, and after the circulation pump heats up in the heat exchanger, it is circulated to the top for injection The device enters the high-efficiency esterification reactor by spraying to form the circulation of the esterification liquid....

Embodiment 2

[0064] A kind of high-efficiency esterification method of plasticizer trioctyl trimellitate, described high-efficiency esterification method comprises the following steps: S1, put trimellitic anhydride and octanol into the high-efficiency esterification reactor in molar ratio for pre-mixing, Under the conditions of stirring and nitrogen blanketing, preheat to 120-150°C, the absolute pressure is 0.04-0.3MPa, and the slow stirring speed is 35r / min; S2, after trimellitic anhydride is completely dissolved in octanol, raise the temperature to 150-180 After ℃, add a mass ratio of liquid inorganic acid ester catalyst to carry out catalytic esterification reaction; S3, the esterification liquid is from the bottom of the high-efficiency esterification reactor, and after the circulation pump heats up in the heat exchanger, it is circulated to the top for injection The device enters the high-efficiency esterification reactor by spraying to form the circulation of the esterification liquid...

Embodiment 3

[0066] A kind of high-efficiency esterification method of plasticizer trioctyl trimellitate, described high-efficiency esterification method comprises the following steps: S1, put trimellitic anhydride and octanol into the high-efficiency esterification reactor in molar ratio for pre-mixing, Under the conditions of stirring and nitrogen blanketing, preheat to 120-150°C, the absolute pressure is 0.04-0.3MPa, and the slow stirring speed is 35r / min; S2, after trimellitic anhydride is completely dissolved in octanol, raise the temperature to 150-180 After ℃, add a mass ratio of liquid inorganic acid ester catalyst to carry out catalytic esterification reaction; S3, the esterification liquid is from the bottom of the high-efficiency esterification reactor, and after the circulation pump heats up in the heat exchanger, it is circulated to the top for injection The device enters the high-efficiency esterification reactor by spraying to form the circulation of the esterification liquid...

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Abstract

The invention provides a high-efficiency esterification method of trioctyl trimellitate. According to the invention, an esterification liquid is circulated from the bottom of a kettle to the top of the kettle, and is sprayed into the kettle, and the reaction contact area is increased, thereby effectively improving the mixing effect; a stirring system uses a three-layer blade set device to promoteuniform stirring, and can shorten the esterification time by half accordingly, saves energy, and reduces consumption; and after the esterification is completed, the esterification rate is up to 99% orover 99%, and the acid value is relatively low. The method significantly improves the esterification effect of the trioctyl trimellitate, the trioctyl trimellitate can be continuously esterified, theesterification time is shortened, the cost is reduced, and the method is safe and environmentally-friendly, and meets the requirements of green chemical industry and sustainable development. A product has the advantages of light color, good quality and high purity.

Description

technical field [0001] The invention relates to the technical field of plasticizer preparation, in particular to a high-efficiency esterification method of trioctyl trimellitate. Background technique [0002] Trioctyl trimellitate (TOTM) is a new type of special high-grade plasticizer based on heat resistance and durability. It has extremely excellent heat resistance, mobility and electrical insulation. The advantages of polyester plasticizers and monomeric plasticizers, compatibility, processability and low temperature are better than polyester plasticizers. At present, my country's wire and cable industry is in line with international standards. According to ISO standards, the temperature resistance grades of cables in the telecommunications industry will be raised to 105°C and 125°C. Because trioctyl trimellitate has good insulation performance, low volatility and low mobility, it is widely used in wire and cable, automotive interior materials, heat-resistant wire coati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C69/76C07C67/08B01J19/18B01J19/00B01F7/18B01F7/00
CPCB01J19/0066B01J19/18C07C67/08B01F27/074B01F27/112B01F27/90C07C69/76Y02P20/141
Inventor 曹正国冯龙海李江华王钰翔
Owner JIANGSU ZHENGDAN CHEM IND CO LTD
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