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Dioctyl phthalate production line and DOTP production method

A technology of dioctyl phthalate and production line, which is applied in the field of dioctyl phthalate production line and DOTP production, can solve the problems of large amount of catalyst, slightly yellow color and high content of octanol, and achieves small amount of catalyst and improved quality Effect

Active Publication Date: 2013-03-06
张炜海
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The existing DOTP (dioctyl terephthalate) production line and production method have a long esterification reaction time, a large amount of catalyst, high octanol content in the product, and a yellowish color

Method used

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  • Dioctyl phthalate production line and DOTP production method
  • Dioctyl phthalate production line and DOTP production method

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Embodiment approach 1

[0030] Implementation mode one: if figure 1 As shown, the dioctyl phthalate production line includes an esterification system, a dealcoholization system, a neutralization / washing system, a stripping system, a filtration decolorization system and a sewage purification recovery system, and is characterized in that:

[0031](1) The esterification system includes alcohol feed tank B102, esterification reaction kettle R101, packed tower K101, esterification system condensers W101A, W101B and esterification system condensation tank B103, wherein the bottom of alcohol feed tank B102 is provided with a feed There is a valve on the feed pipe, and it leads into the esterification reactor R101. The bottom of the esterification reactor R101 is equipped with a discharge pipe with a valve; the top of the esterification reactor R101 is equipped with an outlet pipe and an inlet with a valve. The material funnel and the gas outlet pipe go through the packing tower K101, the shell side of the e...

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PUM

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Abstract

The invention relates to a dioctyl phthalate production line and a DOTP production method. Existing DOTP production methods have the defects of long esterification reaction time, large catalyst dosage, high octanol content in product, and slightly yellow color. The invention provides a dioctyl phthalate production line comprising an esterification system, a dealcoholization system, a neutralization / washing system, a stripping system, a filtering and decolorizing system, and a sewage purification and recovery system. All the systems are modified. The invention also relates to a DOTP production method, comprising a plurality of steps such as esterification, dealcoholization, neutralization / washing, stripping, filtering and decolorizing, sewage purification and recovery, and the like. All the steps are different from those of prior arts. When DOTP is produced with the method provided by the invention, the esterification reaction can be achieved in 4-5 hours; a catalyst dosage is low; the product is clean and colorless; alcohol content in finished product can be reduced to 20ppm; and quality is greatly improved. The production line and the method can be used for producing dioctyl terephthalate, dioctyl orthophthalate, and dioctyl isophthalate.

Description

technical field [0001] The invention relates to a dioctyl phthalate production line and a method for producing DOTP. Background technique [0002] The existing DOTP (dioctyl terephthalate) production line and production method have a long esterification reaction time, a large amount of catalyst, high octanol content in the product, and a yellowish color. Contents of the invention [0003] The technical problem to be solved in the present invention is how to overcome the above-mentioned defective of prior art, a kind of dioctyl phthalate production line and the method for producing DOTP are provided. [0004] In order to solve the above-mentioned technical problems, the dioctyl phthalate production line of the present invention comprises an esterification system, a dealcoholization system, a neutralization / washing system, a stripping system, a filtration decolorization system and a sewage purification recovery system, and is characterized in that: [0005] (1) The esterifi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C69/80C07C69/82C07C67/08
Inventor 张炜海
Owner 张炜海
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