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DOP (dioctylphthalate) esterification reaction system and production process

An esterification reaction and esterification technology, applied in the field of DOP production, can solve the problems of high production cost, no improvement, complicated process, etc., and achieve the effect of saving dosage, shortening working time, and reducing impact

Active Publication Date: 2015-03-25
杭州福莱蒽特科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this technical solution improves the reaction rate, it does not achieve better results for technologies such as alcohol-water separation, and has a certain degree of superiority in DOP products, but the process is more complicated and the production cost is high.

Method used

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  • DOP (dioctylphthalate) esterification reaction system and production process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Such as figure 1 As shown, the DOP esterification reaction system includes a reactor 1 capable of storing the mixed solution, and the two ends of the reactor are provided with an input pipeline 2, and the mixed solution includes phthalic anhydride, octanol and a catalyst; the reactor is connected with a gas riser 3, and the gas riser and The esterification tower 4 communicates, and the upper end of the esterification tower is connected with the first cooling group 5, and the first cooling group includes two series-connected first treatment coolers 6 and the second treatment cooler 7, and are all connected with the first collector The tank 8 is connected, and a second collection tank 9 is connected to one side of the second processing cooler, and the bottom of the second collection tank communicates with the first collection tank. One side of the first cooling group is connected with the alcohol-water separation tank 10 through the first collection tank, and a condensate...

Embodiment 2

[0036] Such as figure 1 As shown, the DOP esterification reaction system includes a reactor 1 capable of storing the mixed solution, and the two ends of the reactor are provided with an input pipeline 2, and the mixed solution includes phthalic anhydride, octanol and a catalyst; the reactor is connected with a gas riser 3, and the gas riser and The esterification tower 4 communicates, and the upper end of the esterification tower is connected with the first cooling group 5, and the first cooling group includes two series-connected first treatment coolers 6 and the second treatment cooler 7, and are all connected with the first collector The tank 8 is connected, and a second collection tank 9 is connected to one side of the second processing cooler, and the bottom of the second collection tank communicates with the first collection tank. One side of the first cooling group is connected with the alcohol-water separation tank 10 through the first collection tank, and a condensate...

Embodiment 3

[0046] Such as figure 1 As shown, the DOP esterification reaction system includes a reactor 1 capable of storing the mixed solution, and the two ends of the reactor are provided with an input pipeline 2, and the mixed solution includes phthalic anhydride, octanol and a catalyst; the reactor is connected with a gas riser 3, and the gas riser and The esterification tower 4 communicates, and the upper end of the esterification tower is connected with the first cooling group 5, and the first cooling group includes two series-connected first treatment coolers 6 and the second treatment cooler 7, and are all connected with the first collector The tank 8 is connected, and a second collection tank 9 is connected to one side of the second processing cooler, and the bottom of the second collection tank communicates with the first collection tank. One side of the first cooling group is connected with the alcohol-water separation tank 10 through the first collection tank, and a condensate...

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Abstract

The invention relates to a DOP (dioctylphthalate) esterification reaction system and a production process. The DOP esterification reaction system comprises a reactor, input pipelines are arranged at two ends of the reactor, the reactor is communicated with a stand pipe, the stand pipe is communicated with an esterification tower, the upper end of the esterification tower is connected with a first cooling unit, one side of the first cooling unit is connected with an ethanol-water separation tank by a first collection tank, and a condensate pump is connected between the first collection tank and the ethanol-water separation tank. The DOP esterification production process comprises the procedures of 1) esterification, 2) ethanol flushing, 3) neutralization and washing, 4) dehydration and 5) filtration. The DOP esterification reaction system and the production process have the advantages that the cooling unit can improve the cooling efficiency, the working time of the whole procedure is shortened, meanwhile, recycle of a water resource in the whole process is realized, the consumption of softened water in the production cost is reduced, and sewage discharge is reduced. In addition, the influence of produced water returning to neutralization and washing on a product can be effectively reduced and the high-quality rate of the DOP product can be ensured by adjusting the dehydration process condition after neutralization and washing.

Description

technical field [0001] The invention belongs to the technical field of DOP production, and relates to a DOP esterification reaction system and a production process. Background technique [0002] DOP plasticizer is one of the plastic additives, it is a chemical compatible with plastic or synthetic resin, it can make plastic soft and reduce brittleness, so it has a wide range of applications in industry. Because dioctyl phthalate (referred to as DOP) has excellent performance and low price, and the raw material is easy to obtain, it is the most commonly used in industry. Synthesis of DOP includes acid-catalyzed synthesis and non-acid-catalyzed synthesis; phthalic anhydride and octanol A certain amount of generated water will be generated during the process of esterification to produce DOP. Generally, enterprises will discharge the generated water (which contains a small amount of octanol) as wastewater, which will have a certain impact on environmental governance. [0003] In...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C69/80C07C67/08
CPCC07C67/08C07C67/48C07C69/80
Inventor 邱成顺吴军
Owner 杭州福莱蒽特科技有限公司
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