Reaction system and method for hydrofining crude terephthalic acid

A crude terephthalic acid and reaction system technology, applied in the field of crude terephthalic acid purification, can solve the problems of uneven hydrogen distribution, equipment investment costs, high operating costs, and low mass transfer rate

Inactive Publication Date: 2021-04-27
NANJING YANCHANG REACTION TECH RES INST CO LTD
View PDF8 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] (1) Small gas-liquid interface area and low mass transfer rate
Moreover, the distribution of hydrogen in the solution is uneven, the hydrogenation effect is poor, and the catalyst loss is lar

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
  • Reaction system and method for hydrofining crude terephthalic acid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0046] refer to figure 1 As shown, the crude terephthalic acid hydrogenation and refining reaction system provided by the embodiment of the present invention mainly includes a crude terephthalic acid raw material tank 11, a hydrogen gas inlet pipeline 12, a hydrogenation reactor 20, a crystallization tower 30, Centrifugal separator 40 , dryer 50 and collection tank 60 . The crude terephthalic acid raw material tank 11 is connected to the hydrogenation reactor 20 through a crude terephthalic acid pipeline 13 so that the crude terephthalic acid enters the hydrogenation reactor 20 . The hydrogenation reactor 20 is internally provided with a hydrogen micro-interface generator 21, a gas distribution pipeline 22 and a palladium-carbon catalyst bed 23, and the hydrogen gas inlet pipeline 12 passes through the side wall of the hydrogenation reactor 20 and the hydrogen micro-interface generator 21 connected.

[0047] The hydrogen micro-interface generator 21 is arranged at the bottom...

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

A reaction system for hydrofining crude terephthalic acid comprises a hydrogenation reactor, and a hydrogen micro-interface generator used for dispersing broken hydrogen is arranged in the hydrogenation reactor. The side wall of the hydrogenation reactor is communicated with a crude terephthalic acid pipeline and a hydrogen inlet pipeline, and the hydrogen inlet pipeline penetrates through the side wall of the hydrogenation reactor and is led into the hydrogen micro-interface generator. A product purified terephthalic acid obtained after reaction in the hydrogenation reactor sequentially enters a crystallization tower, a centrifugal separator and a dryer, and finally solid purified terephthalic acid is formed and enters a collection tank. According to the reaction system, the mass transfer rate and the macroscopic hydrogenation rate of the gas phase to the reaction liquid are greatly improved, so that the original reaction pressure, reaction temperature and catalyst consumption can be reduced, and the reaction efficiency is improved.

Description

technical field [0001] The invention relates to the field of refining crude terephthalic acid, in particular to a reaction system and method for hydrogenation and refining of crude terephthalic acid. Background technique [0002] Purified terephthalic acid production process, as the mainstream terephthalic acid (PTA) production process, usually includes an oxidation process and a hydrotreating process. The production process is as follows: the crude terephthalic acid ( CTA) is transported to the hydrogenation reactor through the raw material preparation unit, and the compressed hydrogen gas delivered to the hydrogenation reactor after being distributed through the distribution main pipe is fully contacted in the space above the liquid layer in the hydrogenation reactor, and the reaction liquid is redistributed after reaching the dissolution equilibrium. Flow through the reaction liquid layer and the catalyst bed, and hydrogenation reaction occurs in the catalyst bed, the cat...

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
IPC IPC(8): C07C51/487C07C51/43C07C63/26B01J8/02
CPCC07C51/487C07C51/43B01J8/02C07C63/26
Inventor 张志炳李磊吕权刘霁斌李夏冰
Owner NANJING YANCHANG REACTION TECH RES INST 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