Check patentability & draft patents in minutes with Patsnap Eureka AI!

Combined extractant for extractive rectification of m/4-ethyltoluene from C9 aromatic hydrocarbon and separation method

A technology for extractive distillation and p-toluene ethylbenzene, which is used in distillation purification/separation, organic chemistry, etc.

Active Publication Date: 2016-04-20
CHINA PETROLEUM & CHEM CORP +1
View PDF10 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the existing C 9 The technical problem of the separation of the middle and p-methylethylbenzene of the aromatic hydrocarbon mixture, and the development of a method from C 9 A combined extractant and extractive distillation method for the separation of m- and p-methylethylbenzene in aromatic hydrocarbon mixtures is necessary

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
  • Combined extractant for extractive rectification of m/4-ethyltoluene from C9 aromatic hydrocarbon and separation method
  • Combined extractant for extractive rectification of m/4-ethyltoluene from C9 aromatic hydrocarbon and separation method
  • Combined extractant for extractive rectification of m/4-ethyltoluene from C9 aromatic hydrocarbon and separation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] refer to figure 1 The flow shown, from C 9 Separation of m- and p-methylethylbenzene from aromatic hydrocarbon mixture. with C 9 Total mass of aromatic mixture, C 9 Aromatic mixture, C 9 The mass percentage of the former component is 1.41%, the total mass percentage of m-methylethylbenzene and p-methylethylbenzene is 83.34%, and the total mass percentage of mesitylene and o-methylethylbenzene is 1.32%. The combined extractant is 85 parts by mass of isopropyl palmitate and 15 parts by mass of potassium thiocyanate. Combined extractant total mass and C 9 The ratio of the total mass of aromatic hydrocarbon mixture is 0.3. The number of theoretical plates of the heavy component removal tower is 20, and the reflux ratio based on mass is 1; the number of theoretical plates of the extractive distillation column is 60, and the reflux ratio based on mass is 1; The calculated reflux ratio is 1; the top pressure of each tower is 0.1MPa. The yield of the obtained products, ...

Embodiment 2

[0027] refer tofigure 1 The flow shown, from C 9 Separation of m- and p-methylethylbenzene from aromatic hydrocarbon mixture. with C 9 Total mass of aromatic mixture, C 9 Aromatic mixture, C 9 The mass percentage of the former component is 1.41%, the total mass percentage of m-methylethylbenzene and p-methylethylbenzene is 83.34%, and the total mass percentage of mesitylene and o-methylethylbenzene is 1.32%. The combined extractant is 90 parts by mass of isopropyl palmitate, 5 parts by mass of potassium thiocyanate and 5 parts by mass of potassium acetate. Combined extractant total mass and C 9 The ratio of the total mass of aromatic hydrocarbon mixture is 0.3. The number of theoretical plates of the heavy component removal tower is 20, and the reflux ratio based on mass is 1; the number of theoretical plates of the extractive distillation column is 60, and the reflux ratio based on mass is 1; The calculated reflux ratio is 1; the top pressure of each tower is 0.1MPa. T...

Embodiment 3

[0029] refer to figure 1 The flow shown, from C 9 Separation of m- and p-methylethylbenzene from aromatic hydrocarbon mixture. with C 9 Total mass of aromatic mixture, C 9 Aromatic mixture, C 9 The mass percentage of the former component is 1.41%, the total mass percentage of m-methylethylbenzene and p-methylethylbenzene is 83.34%, and the total mass percentage of mesitylene and o-methylethylbenzene is 1.32%. The combined extractant is 80 parts by mass of isopropyl palmitate, 15 parts by mass of sodium thiocyanate and 5 parts by mass of potassium acetate. Combined extractant total mass and C 9 The ratio of the total mass of aromatic hydrocarbon mixture is 0.3. The number of theoretical plates of the heavy component removal tower is 20, and the reflux ratio based on mass is 1; the number of theoretical plates of the extractive distillation column is 60, and the reflux ratio based on mass is 1; The calculated reflux ratio is 1; the top pressure of each tower is 0.1MPa. T...

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 relates to a combined extractant for extractive rectification of m / 4-ethyltoluene from C9 aromatic hydrocarbon and a separation method, and mainly solves the technical problem of difficult separation of m / 4-ethyltoluene from a C9 aromatic hydrocarbon mixture. According to a technical scheme, the combined extractant comprises a component A and a component B, wherein the component A is palmitate, and the component B is thiocyanate or / and acetate, the C9 aromatic hydrocarbon mixture is introduced into a heavy component removal tower equipped with a liquid accumulation tank at the tower top to conduct batch rectification, 1, 2, 4-trimethylbenzene and 1, 2, 3-trimethylbenzene are extracted from the column bottom, the tower top stream is introduced into an extraction rectification tower to perform extraction rectification, m / 4-ethyltoluene is extracted from the tower top, the column bottom stream enters a solvent recovery tower, o-methylethylbenzene and mesitylene can be obtained at the tower top, and the combined extractant can be obtained at the column bottom. The combined extractant and the separation method provided by the invention well solve the problem, and can be applied to the field of C9 aromatic hydrocarbon mixture separation.

Description

technical field [0001] The invention belongs to the chemical industry separation field, specifically, relates to a 9 A combined extractant and separation method for extracting and rectifying inter-distillation and p-toluene in aromatic hydrocarbon mixture. Background technique [0002] M- and p-methylethylbenzene are excellent raw materials for the synthesis of chloromethylstyrene and the oxidation of toluic acid, and their dehydrogenation products are also widely used. However, since C 9 The boiling points of the components in the aromatic mixture are very close, so it is difficult to achieve C by conventional methods. 9 Separation of m- and p-methylethylbenzene from aromatic hydrocarbon mixture. [0003] At present, the methods of precise distillation and accelerated distillation are from C 9 The main method used to separate m- and p-methylethylbenzene from aromatic hydrocarbon mixtures. [0004] Document CN101723790A discloses a kind of from C 9 A precision rectific...

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): C07C7/08C07C15/02
Inventor 田立达顾军民韩诚康
Owner CHINA PETROLEUM & CHEM CORP
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com