PTA oxidation residue comprehensive utilization process

A residue and process technology, which is applied in the field of comprehensive utilization of PTA oxidation residue, can solve the problems of waste gas and dust pollution, environmental pollution threat, low utilization rate, etc., and achieve the effect of saving energy, reducing octanol consumption and improving utilization rate

Pending Publication Date: 2021-05-28
TAIXING FUCHANG SOLID WASTE TREATMENT CO LTD
View PDF2 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A large amount of residue not only needs a place to accumulate, but also poses a great threat to environmental pollution
At present, the technology of treating PTA residue by separation is immature and uneconomical, and a large amount of naphtha or coal is needed to support combustion when incineration, and the waste gas and dust generated by combustion are discharged into the atmosphere and pollute the environment.
[0003] However, other treatment methods also have the disadvantages of low utilization rate and high cost. Therefore, it is necessary to design a comprehensive utilization process of PTA oxidation residue with high utilization rate and good production efficiency.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • PTA oxidation residue comprehensive utilization process
  • PTA oxidation residue comprehensive utilization process
  • PTA oxidation residue comprehensive utilization process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0180] Take Jiaxing Tongkun PTA oxidation residue 1000g (dry basis) into the reactor, add 2001g of octanol, start heating and stirring. When the temperature of the material rises to 184°C, add 3.45g of tetrabutyl titanate catalyst, at this time, the octanol is refluxed with water, wait for the temperature in the kettle to rise to about 220°C and at the same time no water drops are extracted, which is regarded as the end point of the esterification reaction. When it is detected that the acid value of the esterification solution is below 0.5, the esterification reaction is over. When the temperature of the esterification liquid is lowered to 90°C, start to filter to obtain a transparent esterification liquid, and start to enter the rectification step.

[0181] Pour the transparent esterification liquid into the still of the rectification tower. When the vacuum at the top of the tower reaches 0.15kpa, heat the still. When the temperature at the top of the tower rises and stabiliz...

Embodiment 2

[0185] Take Shanghai Yadong PTA oxidation residue 1000g (dry basis) into the reactor, add octanol 2001g, start heating and stirring. When the temperature of the material rises to 184°C, add 3.45g of tetrabutyl titanate catalyst, at this time, the octanol is refluxed with water, wait for the temperature in the kettle to rise to about 220°C and at the same time no water drops are extracted, which is regarded as the end point of the esterification reaction. When it is detected that the acid value of the esterification solution is below 0.5, the esterification reaction is over. When the temperature of the esterification liquid is lowered to 90°C, start to filter to obtain a transparent esterification liquid, and start to enter the rectification step.

[0186] Pour the transparent esterification liquid into the still of the rectification tower. When the vacuum at the top of the tower reaches 0.15kpa, heat the still. When the temperature at the top of the tower rises and stabilizes ...

Embodiment 3

[0190] Take Jiangyin Hailun PTA oxidation residue 1000g (dry basis) into the reactor, add 2001g of octanol, start heating and stirring. When the temperature of the material rises to 184°C, add 3.45g of tetrabutyl titanate catalyst, at this time, the octanol is refluxed with water, wait for the temperature in the kettle to rise to about 220°C and at the same time no water drops are extracted, which is regarded as the end point of the esterification reaction. When it is detected that the acid value of the esterification solution is below 0.5, the esterification reaction is over. When the temperature of the esterification liquid is lowered to 90°C, start to filter to obtain a transparent esterification liquid, and start to enter the rectification step.

[0191] Pour the transparent esterification liquid into the still of the rectification tower. When the vacuum at the top of the tower reaches 0.15kpa, heat the still. When the temperature at the top of the tower rises and stabiliz...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a comprehensive utilization process of PTA oxidation residues. The comprehensive utilization process comprises the following steps: S1, esterification; S2, rectification: performing two-stage rectification on the esterification liquid, and performing condensation separation to obtain crude octyl benzoate, crude dioctyl terephthalate and crude trioctyl trimellitate; and S3, removing impurities, wherein in the step S2, after two-stage rectification, kettle residues are incinerated to obtain cobalt salt, manganese salt and bromine salt. According to the invention, while the PTA oxidation residue is used as the raw material to produce the dioctyl terephthalate plasticizer, octyl benzoate and trioctyl trimellitate can be produced, cobalt salt, manganese salt and bromine salt obtained from the second-stage rectifying still residue can be used as industrial production raw materials to be prepared into cobalt salt and manganese salt, so that the yield of a production evaluation line is increased, the utilization efficiency of the raw materials is enhanced, energy is saved, finished product harvest is increased, and benefits are increased.

Description

technical field [0001] The invention relates to the field of chemical production, in particular to a comprehensive utilization process of PTA oxidation residue. Background technique [0002] PTA is an important chemical raw material, but a large amount of PTA residues will be produced in the production process, which mainly include benzoic acid, terephthalic acid, phthalic acid, isophthalic acid, and phenylene. A large amount of residue not only needs a place for accumulation, but also poses a great threat to environmental pollution. At present, the technology of treating PTA residue by separation is immature and uneconomical, and a large amount of naphtha or coal is needed to support combustion when incineration, and the waste gas and dust generated by combustion are discharged into the atmosphere and pollute the environment. . [0003] However, other treatment methods also have the disadvantages of low utilization rate and high cost. Therefore, it is necessary to design ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): C07C67/08C07C69/76C07C69/82C07C69/78C07C67/48C07C67/03
CPCC07C67/08C07C67/48C07C67/03C07C69/76C07C69/82C07C69/78
Inventor 沈福昌沈建东沈世金张利
Owner TAIXING FUCHANG SOLID WASTE TREATMENT CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap