Electrochemical preparation method for ethylene

A technology of ethylene and electrolyte, applied in the direction of electrolysis process, electrolysis components, electrolysis organic production, etc., to achieve the effect of short reaction cycle, low reaction cost and wide source

Active Publication Date: 2019-07-16
TIANJIN UNIV
View PDF0 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the use of succinic acid electrolysis to obtain ethylene has not been reported

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
  • Electrochemical preparation method for ethylene
  • Electrochemical preparation method for ethylene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Drugs: Deionized water (18.2MΩ, Merck Milli-QAdvantageA10 ultrapure water system), succinic acid, potassium hydroxide, potassium sulfate and sulfuric acid used were bought back and used directly without further purification.

[0026] Electrolytic cell: The electrolytic cell used in this reaction is 50mm 3 The screw port can be sealed without diaphragm Pikes glass electrolytic cell. The electrolysis system is a three-electrode system, in which a Pt sheet (1cm×1cm) is used as the working electrode, a Pt mesh (60 mesh, 1cm×1cm) is used as the counter electrode, and a Hg / HgO (1M KOH) electrode is used as the reference electrode.

[0027] Add 1.5 g of succinic acid and 6.25 ml of 2 mol / L KOH aqueous solution (as a supporting electrolyte) to the beaker and mix them, then add deionized water to make the volume to 25 ml. Put the magnet into the beaker, turn on 600rpm and stir for 10min, then add it to the above electrolytic cell. Place the electrolytic cell in a water bath at...

Embodiment 2-25

[0030] The concentration of succinic acid, the type of solvent, the type, concentration and applied voltage of the supporting electrolyte affect the selectivity of ethylene in Table 1. Wherein embodiment 2-21 and 23-25 ​​use working electrode with embodiment 1, the working electrode that embodiment 22 uses is graphite electrode. Others are the same as embodiment 1.

Embodiment 1-25

[0032]

[0033]

[0034] It can be seen from the data in Table 1 that when the solvent is deionized water and other conditions are certain, the higher the concentration of succinic acid, the higher the Faradaic efficiency and ethylene selectivity; considering other factors, generally choose the concentration of succinic acid 0.5mol / L. Under certain other conditions, the faradaic efficiency and ethylene selectivity are high when alkaline electrolyte is added, and the stronger the alkalinity, the higher the faradaic efficiency and ethylene selectivity; when the supporting electrolyte is neutral or acidic, the ethylene selectivity is lower; Considering other factors, KOH is generally selected as the alkaline electrolyte, and the molar ratio of KOH to succinic acid is 1:1. Under certain other conditions, the higher the voltage, the higher the Faradaic efficiency and ethylene selectivity; when the voltage is lower than 3V, the Faradaic efficiency and ethylene selectivity are ...

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 electrochemical preparation method for ethylene. The ethylene is obtained through carrying out electrolysis by taking inert electrodes as a working electrode and a counter electrode and taking a solution of succinic acid and an alkaline electrolyte in a protic or nonprotic solvent as an electrolyte. According to the method, the ethylene is prepared by adopting the electrochemical method for the first time, the succinic acid is a reproducible environment-friendly raw material, an aqueous solution system can be employed completely, and the obtained ethylene is separated naturally and is easy to collect and high in product purity.

Description

technical field [0001] The invention belongs to the technical field of electrochemical synthesis, and in particular relates to an electrocatalytic preparation method of ethylene. Background technique [0002] With the increasing depletion of non-renewable fossils and the increasingly prominent environmental pollution problems, the research and development of renewable carbon-neutral chemical products is of strategic significance for alleviating the oil crisis, improving environmental pollution, and achieving sustainable development [0003] Ethylene is the basic chemical raw material for synthetic fibers, synthetic rubber, synthetic plastics, and synthetic ethanol. It is also used in the manufacture of vinyl chloride, styrene, ethylene oxide, acetic acid, acetaldehyde, ethanol, and explosives. Ethylene products account for more than 75% of petrochemical products. Ethylene is one of the largest chemical products in the world. It is the core of the petrochemical industry and o...

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): C25B3/00
CPCC25B3/00
Inventor 王庆法袁刚张香文王涖邹吉军刘国柱李国柱
Owner TIANJIN UNIV
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