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Activated carbon-removed low-color diisobutyl phthalate production device and production method thereof

A technology for producing diisobutyl phthalate and a production device is applied in the field of deactivated carbon and low color diisobutyl phthalate production devices, and can solve the problems of reducing production cost, increasing the amount of solid waste, and high production cost , to achieve the effect of reducing side reactions, reducing color, and reducing the production of side reactions

Pending Publication Date: 2022-08-02
ZHEJIANG JIANYE CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims to overcome the problem of high production cost and increase of solid waste in the prior art that requires the use of a decolorizer to decolorize diisobutyl phthalate crude esters and products, and provides a low-color o-phthalate deactivation carbon Diisobutyl phthalate production device and production method thereof, without using decolorizers including activated carbon, control the design of reaction device and production method so that the output diisobutyl phthalate has low color and luster Features, reduce production costs, and help green production

Method used

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  • Activated carbon-removed low-color diisobutyl phthalate production device and production method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] like figure 1 As shown, the present embodiment provides a deactivated carbon low-color diisobutyl phthalate production device, comprising an esterification kettle 1 with a temperature control device, an esterification tower 2, a separation Phase device 4, alcohol-water separator 5 and recovery alcohol tank 6;

[0028] The esterification kettle is provided with a first inlet 11, a second inlet 12, a catalyst inlet 13, a nitrogen inlet 14, a first outlet 15 and a second outlet 16;

[0029] The esterification tower is provided with a third feed port 21, a third discharge port 22, a fourth feed port 23 and a fourth discharge port 24, and the fourth feed port of the esterification tower and the esterification kettle No. A discharge port is connected with a pipeline, and the fourth discharge port of the esterification tower is connected with a pipeline of the second feed port of the esterification kettle;

[0030] The phase separator is provided with a fifth feed port 41, a...

Embodiment 2

[0040] like figure 1 As shown, the present embodiment provides a deactivated carbon low-color diisobutyl phthalate production device, including an esterification kettle 1 with a temperature control device, an esterification tower 2, a condensation 3, phase separator 4, alcohol-water separator 5, recovery alcohol tank 6, raw material alcohol tank 7 and catalyst tank 8;

[0041] The esterification kettle is provided with a first feeding port 11, a second feeding port 12, a catalyst inlet 13, a nitrogen inlet 14, a first discharging port 15 and a second discharging port 16; the nitrogen inlet of the esterification kettle The front is also provided with a pressure regulating valve 9 and a gas flow meter 10; the raw material alcohol tank is connected with the second feed port of the esterification kettle, and the catalyst tank is connected with the catalyst inlet pipeline of the esterification kettle;

[0042] The esterification tower is provided with a third feed port 21, a third...

Embodiment 3

[0052] like figure 1 As shown, the present embodiment provides a deactivated carbon low-color diisobutyl phthalate production device, including an esterification kettle 1 with a temperature control device, an esterification tower 2, a condensation 3, phase separator 4, alcohol-water separator 5, recovery alcohol tank 6, raw material alcohol tank 7 and catalyst tank 8;

[0053] The esterification kettle is provided with a first feeding port 11, a second feeding port 12, a catalyst inlet 13, a nitrogen inlet 14, a first discharging port 15 and a second discharging port 16; the nitrogen inlet of the esterification kettle The front is also provided with a pressure regulating valve 9 and a gas flow meter 10; the raw material alcohol tank is connected with the second feed port of the esterification kettle, and the catalyst tank is connected with the catalyst inlet pipeline of the esterification kettle;

[0054] The esterification tower is provided with a third feed port 21, a third...

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Abstract

The invention relates to the field of chemical engineering, and discloses a deactivated carbon low-color diisobutyl phthalate production device and a production method thereof.The device comprises an esterification kettle with a temperature control device, an esterification tower, a phase splitter, an alcohol-water separator and an alcohol recovery tank which are sequentially connected through pipelines in the material flowing direction; the esterification kettle is provided with a nitrogen inlet, and a reflux pipeline is further arranged between the phase splitter and the alcohol-water separator; the alcohol-water separator comprises an alcohol outlet, the alcohol recovery tank comprises a seventh feed port and a seventh discharge port, the seventh feed port of the alcohol recovery tank is connected with the alcohol outlet of the alcohol-water separator through a pipeline, and the seventh discharge port of the alcohol recovery tank is connected with the alcohol-water separator through a pipeline. In the production process, the nitrogen protection of an esterification kettle is kept, and recovered isobutanol is added at 135-138 DEG C, so that the generation of side reactions and the generation of coloring substances are reduced, the addition of a decolorizing agent is avoided, and the produced diisobutyl phthalate has the characteristic of low color. The process is simple, the device is reliable, and positive quality benefits and environmental protection benefits are achieved.

Description

technical field [0001] The invention relates to the field of chemical industry, in particular to a deactivated carbon low-color diisobutyl phthalate production device and a production method thereof. Background technique [0002] Diisobutyl phthalate is an organic compound mainly used as a plasticizer for cellulose resin, vinyl resin, nitrile rubber and chlorinated rubber. The production method of diisobutyl phthalate is as follows: using phthalic anhydride and isobutanol as raw materials, adding decolorizing agent activated carbon under the action of sulfuric acid catalyst to generate crude ester through heating reaction, neutralizing with soda ash and then inputting into a dealcoholization tower for carrying out Vacuum dealcoholization operation, after dealcoholization, the semi-finished product enters the filter press to remove impurities to obtain diisobutyl phthalate. Chinese Patent Publication No. "CN105237394A" discloses a method for preparing diisobutyl phthalate, c...

Claims

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Application Information

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IPC IPC(8): B01J19/18B01J19/24B01J19/00C07C67/08C07C67/48C07C69/80
CPCB01J19/18B01J19/24B01J19/00B01J19/0053B01J19/0066C07C67/08C07C67/48C07C69/80Y02P20/584
Inventor 吴方丽金波蒋开炎王爱艳崔元存刘小琼刘小兵
Owner ZHEJIANG JIANYE CHEM
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