Method for extracting, rectifying and separating pseudocumene and indane

A technology of partial trimethylbenzene, extraction and rectification, applied in the field of separation of chemical industry, can solve the problems affecting the development and utilization of resources, high energy consumption, etc., and achieve the effect of low production cost, low energy consumption and high product purity

Inactive Publication Date: 2009-11-11
NANJING NORMAL UNIVERSITY
View PDF0 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Since the boiling point of mesitylene (168.0°C) is close to the boiling point of indane (176.0°C), if it is further separated and refined by ordinary distillation methods, the energy consumption will be too large, which will directly affect the further development and utilization of this part of resources.

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
  • Method for extracting, rectifying and separating pseudocumene and indane
  • Method for extracting, rectifying and separating pseudocumene and indane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Embodiment 1, the method for extracting and rectifying separation of trimethylbenzene and indane, with reference to figure 1 Shown technological process and technological parameters shown in table 1, raw material 1. is a raw material mixture, wherein the mass content of mesitylene and indane are respectively 80%, 20%, flow rate is 5Kg / h, solvent 9. is sulfolane, and flow rate is 15Kg / h, the temperature at the top of the extractive distillation tower T1 is 168-169°C, the temperature at the bottom of the tower is 255-260°C, the reflux ratio is controlled at 4-5, the flow rate of the tower top extract ③ is 4Kg / h, and the composition is x 偏三甲苯 =0.9962,x 茚满 =0.0038, tower kettle discharge ④The flow rate is 21Kg / h, and the composition is x 环丁砜 =0.9524,x 偏三甲苯 =0.0007,x 茚满 =0.0469, this part of the output is also the feed of the solvent regeneration tower T2, the top temperature of the solvent regeneration tower T2 is 176-177°C, the temperature of the tower bottom is about ...

Embodiment 2

[0020] Embodiment 2 is substantially the same as Embodiment 1, but the mass ratio of solvent to raw material mixture is 2 / 1.

Embodiment 3

[0021] Embodiment 3 is substantially the same as Embodiment 1, but the mass ratio of solvent to raw material mixture is 4 / 1.

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 method for extracting, rectifying and separating pseudocumene and indane, which comprises the following steps: (1) using sulfolane as a solvent for extractive rectification, and adding the sulfolane and a raw material mixture into an extractive rectification tower according to a certain proportion; (2) after separation, leaving the high-purity pseudocumene at the tower top, and leaving the sulfolane solvent and the indane at the tower bottom; (3) delivering the tower bottom material into a solvent regeneration tower to carry out distillation operation, wherein an extract at the tower top is the indane, and the tower bottom is the sulfolane solvent; and (4) delivering the solvent sulfolane at the tower bottom back to the extractive rectification tower for recycling. A product of the method is the pseudocumene of which the purity is more than or equal to 99.5 percent; and the extracted and rectified sulfolane solvent can be recycled, and simultaneously the reclaiming rate of the indane is more than or equal to 97 percent. Compared with the conventional common distillation method, the purity of the product is higher, the reclaiming rate is higher, and the energy consumption is lower.

Description

technical field [0001] The invention relates to a chemical separation method, in particular to an extraction and rectification separation method of mesitylene and indane. Background technique [0002] Trimethylbenzene and indane are both important basic organic chemical raw materials and organic chemical solvents. Indane is a raw material for manufacturing synthetic resins. Trimethylbenzene is widely used in chemical production and can be used to prepare vitamins, xylene, trimellitic anhydride, Trimethylbenzene, durene and pyromellitic dianhydride, etc., both of which are present in the by-product of ethylene production-cracking heavy aromatics, which contain about 5% of trimethylene and 1-2% of indane. Because the presence of indane is extremely unfavorable to the catalyst in the subsequent reaction of trimethylbenzene, the two need to be completely separated. [0003] Since the boiling point of mesitylene (168.0°C) is close to that of indane (176.0°C), if it is further se...

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): C07C15/02C07C13/465C07C7/08
Inventor 林军顾正桂陈远新姚小利冯佳佳吴旋
Owner NANJING NORMAL UNIVERSITY
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