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

Method for removing lead ions in electrolytic copper foil electrolyte

A technology for electrolytic copper foil and copper electrolyte, applied in the electrolysis process, electrolysis components, electroforming and other directions, can solve the problems of accelerated coating passivation failure, anode potential enhancement, current density increase, etc., and achieves low cost and extended use. Time, the effect of reducing the concentration of reduction

Active Publication Date: 2019-03-01
JIANGSU MINGFENG ELECTRONIC MATERIALS CO LTD
View PDF2 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the area covered by scaling has poor conductivity, resulting in a relative increase in the current density in the uncovered area, and an increase in the anode potential, which accelerates the passivation failure of the coating in this area.

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 removing lead ions in electrolytic copper foil electrolyte
  • Method for removing lead ions in electrolytic copper foil electrolyte

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Take 100g of expanded graphite (EG) and place it in 0.5% (w / w) UiO-66 aqueous solution, after stirring for 3 hours, wash the expanded graphite with deionized water until there is no UiO-66 in the washing solution, then the adsorbed The expanded graphite of UiO-66 is dried and filled into a stainless steel column lined with polytetrafluoroethylene, which is the lead ion adsorption column.

Embodiment 2

[0020] Take 100g of expanded graphite (EG) and place it in a 1.0% (w / w) UiO-66 aqueous solution. After stirring for 3 hours, wash the expanded graphite with deionized water until there is no UiO-66 in the washing solution, and then the adsorbed The expanded graphite of UiO-66 is dried and filled into a stainless steel column lined with polytetrafluoroethylene, which is the lead ion adsorption column.

Embodiment 3

[0022] Take 100g of expanded graphite (EG) and place it in 2.0% (w / w) UiO-66 aqueous solution, after stirring for 3 hours, wash the expanded graphite with deionized water until there is no UiO-66 in the washing solution, then the adsorbed The expanded graphite of UiO-66 is dried and filled into a stainless steel column lined with polytetrafluoroethylene, which is the lead ion adsorption column.

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 belongs to the technical field of copper electrolyte treatment and discloses a method for removing lead ions in electrolytic copper foil electrolyte. In the production process of the electrolytic copper foil, the lead ion content in the electrolyte can be effectively reduced. The method takes zirconium chloride as a metal salt, terephthalic acid as an organic ligand, N, N-dimethyl formamide as an organic solvent, adopts a solvent method to prepare UiO-66, and loads UiO-66 on expanded graphite as a filling material of an adsorption column, wherein the adsorption column has good capability of removing lead ions in copper electrolyte, and the lead ion concentration in the electrolyte is reduced to less than 0.1Mug / ml after the electrolyte flows through the adsorption column. Dueto the reduction of the lead ion concentration in the electrolyte, the service time of titanium-based iridium-tantalum oxide coated anode is effectively prolonged.

Description

technical field [0001] The invention relates to a technology for removing lead ions in an electrolyte for electrolytic copper foil, in particular to a method for selectively and effectively removing lead ions in a copper electrolyte by using an adsorption column with high selectivity to lead ions. Background technique [0002] In the production process of electrolytic copper foil, the electrolyte is composed of copper sulfate, sulfuric acid and additives, and the concentration of sulfuric acid is very high. Due to the high current density applied during the electrolysis process, oxygen is precipitated on the anode, so the anode of the electrolytic copper foil usually adopts an oxygen-evolving titanium-based iridium-tantalum oxide coating anode with excellent corrosion resistance and electrocatalytic performance ( Ti / IrO 2 +Ta 2 o 5 ). During the electrolysis process, the surface of the anode is slowly covered by a dense scaling layer, resulting in adverse effects such as...

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): C25D1/04C25D21/18
CPCC25D1/04C25D21/18
Inventor 单学凌单晓梦陈智栋王文昌明小强王朋举鲁卫平
Owner JIANGSU MINGFENG ELECTRONIC MATERIALS CO LTD
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