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

Synthesis method and equipment for tetramethylammonium hydroxide

A technology of tetramethylammonium hydroxide and synthesis method, which is applied in the direction of electrodes, electrolysis process, electrolysis components, etc., can solve the problems of short service life of graphite anode and low efficiency of electrolysis current

Active Publication Date: 2020-11-20
信联电子材料科技股份有限公司
View PDF10 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] For this reason, the present invention proposes a synthetic method and equipment for tetramethylammonium hydroxide, which can solve the technical problems of low electrolytic current efficiency and short service life of graphite anodes at large electrolyte circulation rates

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
  • Synthesis method and equipment for tetramethylammonium hydroxide
  • Synthesis method and equipment for tetramethylammonium hydroxide

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0031] Such as figure 1 Shown, a kind of synthetic method for tetramethylammonium hydroxide comprises the following steps:

[0032] (1) butadiene derivatives are dissolved in an organic solvent to prepare an electrode electrolyte, a graphite electrode is used as a reaction electrode, platinum is used as a counter electrode, and a silver / silver chloride electrode is used as a reference electrode and put into the electrode electrolyte, Power on at -0.3V (vs.Ag / Ag+) for polymerization. After the reaction is over, a yellow film is formed on the surface of the graphite electrode to obtain a modified graphite electrode. Take it out and dry it, and place it in the anode chamber;

[0033] (2) The anode chamber and the cathode chamber are separated by a cation exchange membrane, and a cathode is placed in the cathode chamber;

[0034] (3) Connect the current between the modified graphite electrode and the cathode, use tetramethylammonium chloride solution as raw material, pump it into...

Embodiment 1

[0050] Dissolve 1,1,4,4-tetrachloro,2,3-difluorobutadiene and lithium tetrafluoroborate in tetrahydrofuran to prepare electrode electrolyte, use graphite electrode as reaction electrode, platinum as counter electrode, silver / The silver chloride electrode is used as a reference electrode and placed in the electrode electrolyte, and is energized at -0.3V (vs.Ag / Ag+) for 1 hour for polymerization. After the reaction is completed, a yellow film is formed on the surface of the graphite electrode to obtain a modified graphite electrode. , take it out and dry it, and place it in the anode chamber.

[0051] A stainless steel plate is placed in the cathode chamber as the cathode, and the anode chamber and the cathode chamber are separated by a cation exchange membrane. Connect the current between the modified graphite electrode and the cathode, use tetramethylammonium chloride solution as the raw material, pump it into the anode chamber through the anolyte raw material tank and the an...

Embodiment 2

[0054] Except that 1,1,4,4-tetrachloro,2,3-difluorobutadiene was replaced by hexachlorobutadiene, the rest was the same as that of Example 1.

[0055] During this synthesis process, the current efficiency of electrolysis was 93.0%, and the lifetime of the modified graphite electrode was 91 days.

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

PropertyMeasurementUnit
Current efficiencyaaaaaaaaaa
Current efficiencyaaaaaaaaaa
Login to View More

Abstract

The invention discloses a synthetic method and equipment for tetramethylammonium hydroxide. The synthesis method comprises the following steps: dissolving a butadiene derivative and a supporting electrolyte in an organic solvent to prepare an electrode electrolyte, electrifying a graphite electrode under the electrode electrolyte to form a yellow polymer film on the surface of the graphite electrode to obtain a modified graphite electrode, and applying the modified graphite electrode to an anode chamber of an electrolytic cell. According to the invention, a layer of protective film is formed on the surface of the graphite electrode, so that the oxidation of the graphite electrode is inhibited, the corrosion speed of the graphite electrode is reduced, the current efficiency of electrolysisis improved, and good current efficiency and electrode service life can be obtained even at a high electrolyte circulation rate.

Description

technical field [0001] The invention relates to a synthesis method and equipment for organic compounds, in particular to a synthesis method and equipment for tetramethylammonium hydroxide. Background technique [0002] Tetramethylammonium hydroxide (TMAH) is a strong base of equal strength to caustic. Because of its strong alkalinity and no residue after thermal decomposition, especially no conductive ionic substances, it is widely used in the field of electronics industry. With the continuous development of large-scale integrated circuits, the demand for high-purity electronic-grade TMAH is increasing, but the traditional method of preparing TMAH has defects such as high cost and high content of impurity ions. [0003] At present, the preparation methods of TMAH mainly include: precipitation method, ion exchange resin method, addition method, ion membrane method and ion membrane electrolysis method. The precipitation method has the disadvantages of high process cost and l...

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): C25B3/00C25B11/12
CPCC25B3/00
Inventor 刘颂军孙炜刘新雨
Owner 信联电子材料科技股份有限公司
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