Control system and process for producing terephthalic acid by m-xylene oxidation

A technology of terephthalic acid and m-xylene, which is used in control/regulation systems, preparation of organic compounds, preparation of carboxylate, etc., can solve the problem of high pressure, improve utilization rate, reduce reaction time, and improve catalytic efficiency Effect

Inactive Publication Date: 2021-03-26
NANJING YANCHANG REACTION TECH RES INST CO LTD
View PDF0 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides a control system and process for producing terephthalic acid by oxidation of m-xylene, which is used to solve the problem of excessive pressure in the reaction process

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
  • Control system and process for producing terephthalic acid by m-xylene oxidation
  • Control system and process for producing terephthalic acid by m-xylene oxidation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0042] In order to make the objects and advantages of the invention clearer, the present invention will be further described below in conjunction with the examples; it should be understood that the specific examples described here are only for explaining the present invention, and are not intended to limit the present invention.

[0043] Preferred embodiments of the present invention are described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principle of the present invention, and are not intended to limit the protection scope of the present invention.

[0044] It should be noted that, in the description of the present invention, terms such as "upper", "lower", "left", "right", "inner", "outer" and other indicated directions or positional relationships are based on the terms shown in the accompanying drawings. The direction or positional relationship shown is only for...

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 an intelligent control system and process for producing terephthalic acid by m-xylene oxidation. The intelligent control system comprises a slurry bed reactor, a first micro-interface generator, a second micro-interface generator, a condensation unit, a separation unit, a temperature control circulation unit and a crystallization filter, wherein the slurry bed reactor is used as a reaction place of xylene oxidation and is filled with liquid-phase phthalic acid; at least one first micro-interface generator is arranged on a fixed plate positioned in the slurry bed reactor; and at least one second micro-interface generator is arranged in the slurry bed reactor and is positioned below the first micro-interface generator. The system is further provided with the temperature control circulation unit which is used for pumping liquid at the bottom of the slurry bed reactor into a liquid phase inlet of the second micro-interface generator so as to achieve the effect of circulating a solvent in the reactor. The micro-interface generator and other devices are arranged in the reactor, so that the mass transfer efficiency of the gas phase and the liquid phase is improved,the reaction time is shortened, and the material consumption and energy consumption are reduced.

Description

technical field [0001] The invention relates to the preparation of terephthalic acid, in particular to a system and process for producing terephthalic acid by oxidation of m-xylene. Background technique [0002] Xylene is a colorless and transparent liquid; it is a product in which two hydrogens on the benzene ring are replaced by methyl groups, and there are three isomers of ortho, meta, and p. In industry, xylene refers to the mixture of the above isomers; its Oxygen oxidation can produce phthalic acid, terephthalic acid, isophthalic acid and other substances respectively. [0003] Terephthalic acid is an important bulk chemical, which is produced from m-xylene (PX for short) through air oxidation. In the prior art, the preparation process of terephthalic acid is that the raw material is in a stirred reactor with acetic acid as a solvent and cobalt manganese bromide as a catalyst, and an oxidation reaction occurs in contact with oxygen in the air, and m-xylene is oxidized...

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): C07C51/265C07C63/26B01J19/00G05D27/02
CPCB01J19/0093C07C51/265G05D27/02C07C63/26
Inventor 张志炳周政李磊张锋孟为民王宝荣杨高东罗华勋杨国强田洪舟
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