Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Extraction and separation method for hydrocarbons mixture based on ionic liquor

A technology of hydrocarbon mixtures and ionic liquids, applied in the direction of extraction and purification/separation, which can solve problems such as corrosion of equipment, reduction of solubility, and no research

Inactive Publication Date: 2008-03-26
INST OF PROCESS ENG CHINESE ACAD OF SCI
View PDF1 Cites 23 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In the Chinese patent CN200480022303, it is reported that ionic liquid is used as an entrainer to distill and separate narrow-boiling or azeotropic mixtures, but in C 4 There is no research in the process of extracting and rectifying the separation of butadiene from hydrocarbon mixtures; it is reported in Japanese Patent 97 (Showa 52)-24685 that adding a kind of diol compound in the original acetonitrile extracting and rectifying process solvent can be used to a certain extent increase mix C 4 Solubility in the extraction system and the relative volatility of the hydrocarbons
However, due to the presence of water in such extractants, on the one hand, the mixed C 4 Solubility in the extraction system, on the other hand, it will cause ACN to hydrolyze and corrode the equipment

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Before the experiment, add a certain proportion of acetonitrile and deionized water into the equilibrium reactor, and stir evenly. Repeat vacuuming three times to ensure the vacuum degree in the kettle. Then feed C 4 Hydrocarbons, under the conditions of pressure 0.20MPa and temperature 303K, stir for a long enough time until the gas-liquid equilibrium. After equilibrium, the composition of the gas phase was analyzed and calculated by gas chromatography, and the results are shown in Table 1.

Embodiment 2

[0015] Before the experiment, add a certain proportion of acetonitrile and EmimBr into the equilibrium reactor, and stir evenly. Repeat vacuuming three times to ensure the vacuum degree in the kettle. Then feed C 4 Hydrocarbons, under the conditions of pressure 0.20MPa and temperature 303K, stir for a long enough time until the gas-liquid equilibrium. After equilibrium, the composition of the gas phase was analyzed and calculated by gas chromatography, and the results are shown in Table 1.

Embodiment 3

[0017] Before the experiment, add a certain proportion of acetonitrile and BmimBr into the equilibrium reactor, and stir evenly. Repeat vacuuming three times to ensure the vacuum degree in the kettle. Then feed C 4 Hydrocarbons, under the conditions of pressure 0.20MPa and temperature 303K, stir for a long enough time until the gas-liquid equilibrium. After equilibrium, the composition of the gas phase was analyzed and calculated by gas chromatography, and the results are shown in Table 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 present invention is C4 hydrocarbon mixture extracting and separating process. Ionic liquid additive is introduced to form one new type of composite extractant for extracting and separating C4 hydrocarbon mixture with 1, 3-butadiene as the main component. Introducing the ionic liquid additive into the extractant can increase the total dissolubility of C4 hydrocarbon mixture in the extractant, raising the hydrocarbon selectivity and relative volatility, and thus raise the extracting and separating effect obviously. In addition, the added ionic liquid has very low vapor pressure and high boiling point, and thus convenient recovery and reuse.

Description

technical field [0001] C in the present invention 4 The separation method of hydrocarbon mixture relates to a novel extractant based on ionic liquid, which belongs to the technical field of extraction and separation, and specifically relates to the extraction from C 4 A method for extracting and separating butadiene from mixed components. Background technique [0002] 1,3-butadiene (commonly known as butadiene, the same below) is an important petrochemical basic organic raw material and synthetic rubber monomer. 4 One of the most important components in the distillate, second only to ethylene and propylene in petrochemical olefin raw materials. Because its molecule contains conjugated diene, reactions such as substitution, addition, cyclization, and polymerization can occur, making it widely used in synthetic rubber and organic synthesis. It can synthesize butadiene rubber (BR), styrene-butadiene Rubber (SBR), nitrile rubber, styrene-butadiene-styrene elastomer (SBS), acr...

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): C07C11/167C07C7/10
Inventor 张锁江董海峰曾少娟宋大勇闫瑞一张香平
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com