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

Purifying method for silver electrolytic solution

A technology of purification treatment and electrolyte, applied in the direction of photography process, instrument, photography auxiliary process, etc., can solve the problems of not being able to be removed at the same time, unsafe production, etc.

Inactive Publication Date: 2006-12-27
CHENZHOU CITY JINGUI SILVER IND CO LTD
View PDF1 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method cannot remove lead Pb and copper Cu in the electrolyte at the same time, and it is easy to generate explosive silver Ag due to the addition of ammonia water. 3 N, also very unsafe for production

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

[0018] A method for purifying a silver electrolyte is to heat the silver electrolyte to be purified, and utilize Ag to form hydrated ions Ag(OH) in an aqueous solution. 2 - , Adjust the pH value of the silver electrolyte to be purified to 8. At this time, most of the Pb, Cu, Bi, and Sb in the electrolyte were precipitated at the bottom of the electrolyte in the form of hydroxide, and left to stand for 7 hours; the supernatant was filtered out, and the impurities in the supernatant were now Pb, Cu, Bi, Sb, etc. have been reduced to 10 -2 Below the order of g / l, use nitric acid to adjust the electrolyte to an acid content of 3g / l and a silver content of 80g / l, and then return it to the electrolytic cell for use.

Embodiment 2

[0020] A method for purifying silver electrolyte is to heat the silver electrolyte to be purified and add a small amount of silver oxide Ag 2 O as the initiator, using Ag to form hydrated ions Ag(OH) in aqueous solution 2 - , adjust the pH value of the silver electrolyte to be purified to 9. At this time, most of the Pb, Cu, Bi, and Sb in the electrolyte were precipitated at the bottom of the electrolyte in the form of hydroxides; left to stand for 8 hours; the supernatant was filtered out, and the impurities in the supernatant were now Pb, Cu, Bi, Sb, etc. have been reduced to 10 -2 Below the order of g / l, use nitric acid to adjust the electrolyte to an acid content of 6g / l and a silver content of 100g / l, and then return it to the electrolytic cell for use.

Embodiment 3

[0022] A method for purifying silver electrolyte is to heat the silver electrolyte to be purified and add a small amount of silver oxide Ag 2 O is used as initiator, and the pH value of the silver electrolyte to be purified is adjusted to 8. At this time, most of the Pb, Cu, Bi, and Sb in the electrolyte were precipitated at the bottom of the electrolyte in the form of hydroxide; left to stand for 9 hours; the supernatant was filtered out, and the impurities in the supernatant were now Pb, Cu, Bi, Sb, etc. have been reduced to 10 -2 Below the order of g / l, use nitric acid to adjust the electrolyte to an acid content of 9g / l and a silver content of 120g / l, and then return it to the electrolytic cell for use.

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

This invention is the purification method of silver electrolyte. Heating the silver electrolyte that need to be purified, the Ag can generate aqueous Ag (OH) 2- ions in solution, so most Pb, Cu, Bi, Sb deposit with the form of hydroxides to the bottom of electrolyte and removed. This invention can be applied during electrolyte and refining of Ag, and plays the pivot role in production of qualified silver. There is any agent needed during purification. The electrolyte can be reused.

Description

technical field [0001] The invention relates to a method for purifying electrolyte, in particular to a method for purifying silver electrolyte. Background technique [0002] The electrolytic refining of metals is a well known prior art and is widely used in practice. For example, in the electrolytic refining process of silver, coarse silver is used as anode, titanium plate is used as cathode, silver nitrate AgNO 3 Aqueous solution is used as electrolyte, at DC voltage 2-3V, current 250-300A / m 2 99.99% silver can be obtained by refining under certain conditions, and the pH value of the electrolyte is adjusted by adding acid. [0003] Before electrolysis, coarse silver generally contains a small amount of impurities of various metal components such as lead Pb, copper Cu, bismuth Bi, antimony Sb, etc. During the electrolysis process, these impurities enter the electrolyte, and as the electrolysis operation time prolongs, the impurities continue to accumulate in the electroly...

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): C25C1/20C25C7/00
Inventor 蔡练兵
Owner CHENZHOU CITY JINGUI SILVER IND 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