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Production process of dibutyl phthalate plasticizer

A technology of dibutyl phthalate and a production process, which is applied in the field of production technology of dibutyl phthalate plasticizer, can solve the problems of frequent manual operation of the process, unstable product quality, high labor intensity and the like, and achieves the Reduced corrosion resistance, stable product quality, and low labor intensity

Active Publication Date: 2017-11-03
ZIBO BLUE SAIL CHEM +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The traditional production process uses sulfuric acid as a catalyst, and the device process adopts a full-batch production process. The product quality is unstable, the output is small, and the product performance is low in product purity, high in acid value, and high in moisture.
And the manual operation of the process is frequent, the labor intensity is high, and the environment is harsh

Method used

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  • Production process of dibutyl phthalate plasticizer
  • Production process of dibutyl phthalate plasticizer
  • Production process of dibutyl phthalate plasticizer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] (1) Esterification process:

[0065] Add the raw materials phthalic anhydride, n-butanol and solid acid catalyst into the esterification reaction kettle through the first feed port, and then close the first feed valve. Under the agitation of the first agitator, use the internal coil to heat, and gradually raise the temperature to 150°C for 3 hours of reaction. The ester formed by the reaction is cooled by the second condenser and then enters the buffer tank.

[0066] Wherein, the mass ratio of phthalic anhydride, n-butanol and solid acid catalyst is: 1:1.4:0.02.

[0067] The gas phase evaporated in the esterification reaction kettle enters the esterification tower and contacts the reflux alcohol entering the top of the tower in reverse, then enters the first condenser to cool, and then enters the first alcohol-water separation tank for alcohol and water phase separation, and the water-saturated alcohol is separated from the second The upper part of the alcohol-water se...

Embodiment 2

[0083] (1) Esterification process:

[0084] Add the raw materials phthalic anhydride, n-butanol and solid acid catalyst into the esterification reaction kettle through the first feed port, and then close the first feed valve. Under the action of stirring by the first stirrer, use the internal coil to heat, and gradually raise the temperature to 120°C for 5 hours of reaction. The ester formed by the reaction is cooled by the second condenser and then enters the buffer tank.

[0085] Wherein, the mass ratio of phthalic anhydride, n-butanol and solid acid catalyst is: 1:1.2:0.05.

[0086] The gas phase evaporated in the esterification reaction kettle enters the esterification tower and contacts the reflux alcohol entering the top of the tower in reverse, then enters the first condenser to cool, and then enters the first alcohol-water separation tank for alcohol and water phase separation, and the water-saturated alcohol is separated from the second The upper part of the alcohol-...

Embodiment 3

[0102] (1) Esterification process:

[0103] Add the raw materials phthalic anhydride, n-butanol and solid acid catalyst into the esterification reaction kettle through the first feed port, and then close the first feed valve. Under the action of stirring by the first agitator, use the internal coil to heat, and gradually raise the temperature to 180°C for 1 hour of reaction. The ester formed by the reaction is cooled by the second condenser and then enters the buffer tank.

[0104] Wherein, the mass ratio of phthalic anhydride, n-butanol and solid acid catalyst is: 1:1.8:0.04.

[0105] The gas phase evaporated in the esterification reaction kettle enters the esterification tower and contacts the reflux alcohol entering the top of the tower in reverse, then enters the first condenser to cool, and then enters the first alcohol-water separation tank for alcohol and water phase separation, and the water-saturated alcohol is separated from the second The upper part of the alcohol-...

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Abstract

The invention belongs to the technical field of rubber plasticizer production, and particularly relates to a production process of a dibutyl phthalate plasticizer. The process comprises the following procedures of (1) esterification: phthalic anhydride, n-butyl alcohol and catalysts are added to an esterification reactor for temperature rising reaction under the conditions of stirring and nitrogen sealing; during reaction, a gas phase steamed from the esterification reactor enters an esterification column and makes reverse contact with refluxing alcohol in the top of the esterification column, then gas steamed from the top of the esterification column enters a condenser to be condensed into liquid and then enters an alcohol and water separating tank to separate alcohol from a water phase, water saturated alcohol flows back to an extraction tank from the upper part, so as to remove moisture from the water saturated alcohol in the extraction tank, and alcohol forcibly flows back to the top of the esterification column and makes reverse contact with the gas phase steamed from the esterification reactor; (2) neutralization and water washing; (3) steam stripping; (4) filtration. The process has the characteristics of low energy consumption, safety, environmental friendliness, high production efficiency, stable product quality, high purity and low labor intensity and is suitable for continuous production.

Description

technical field [0001] The invention belongs to the technical field of rubber plasticizer production, in particular to a production process of dibutyl phthalate plasticizer. Background technique [0002] Dibutyl phthalate (DBP) is a plasticizer product with high plasticizing efficiency and a wide range of uses. It is mainly used as the main plasticizer for cellulose resin and polyvinyl chloride products, especially for nitrocellulose resin. . It has excellent solubility, decomposition and adhesion, and the softness and stability of the paint film are also good. It has good compatibility with dyes and can be used in films, artificial leather, and plastic products. This product can also be used as a plasticizer and softener for natural rubber, which can improve the resilience of products. [0003] The traditional production process uses sulfuric acid as a catalyst, and the device process adopts a full-batch production process. The product quality is unstable, the output is ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C67/08C07C67/48C07C69/80
CPCC07C67/08C07C67/48C07C69/80
Inventor 王韧邢光全魏乐钊武卫
Owner ZIBO BLUE SAIL CHEM
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