Supercharge Your Innovation With Domain-Expert AI Agents!

Method for quickly recovering metallic silver from silver ion-containing waste liquid

A technology of silver ions and metallic silver, which is applied in the direction of improving process efficiency, can solve problems such as complex technology, high equipment investment, and large power consumption, and achieve the effects of simple process operation, low risk factor, and low recovery cost

Inactive Publication Date: 2011-01-26
XINXING DUCTILE IRON PIPES CO LTD
View PDF0 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] 1. Zinc reduction method: This is a commonly used method, but the yield is low and the reaction is slow
[0004] 2. Acid treatment method: This method reacts quickly, but the conversion rate is low
[0005] 3. High-temperature reduction method: the required conditions are harsh, the power consumption is large, and it is not easy to promote
This method requires high equipment investment, complex technology, and is not easy to promote

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 quickly recovering metallic silver from silver ion-containing waste liquid
  • Method for quickly recovering metallic silver from silver ion-containing waste liquid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0017] The invention comprises the following steps: (1), feeding waste liquid containing silver ions into a sedimentation tank of NaCl solution, discharging supernatant after precipitation to obtain precipitate. The amount of NaCl solution should be sufficient for the silver ions in the waste liquid to form silver chloride precipitates; the judgment method is: take the supernatant liquid drop hydrochloric acid to check, if there is precipitation, it means that the sodium chloride is not added enough, and it still needs to be added; You can proceed to the next step. (2), the obtained precipitate is poured into NaOH solution for separation to obtain a solid isolate. The amount of hydroxide ions in the NaOH solution should be sufficient for the silver ions in the waste liquid to generate silver hydroxide precipitates; the judgment method is: take the supernatant liquid drop lye to check, if there is precipitation, it means that the NaOH solution is not added enough, and it still ...

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 relates to a method for recovering metallic silver, in particular to the method for quickly recovering the metallic silver from silver ion-containing waste liquid. The method comprises the following steps of: (1) introducing the silver ion-containing waste liquid into a precipitation tank which contains Cl<-> ion-containing solution; and discharging liquid supernatant after precipitating to obtain precipitate; (2) separating the obtained precipitate in alkali solution to obtain a solid-state separated matter; and (3) melting the solid-state separated matter at the high temperature of between 1,000 and 1,150DEG C; discharging oxygen; and finally obtaining the metallic silver. The method has the characteristics of simple and convenient operation, low recovery cost and convenient popularization.

Description

technical field [0001] The invention relates to a method for recovering metallic silver, in particular to a method for rapidly recovering metallic silver from waste liquid containing silver ions. Background technique [0002] Among the waste liquids discharged from various laboratories, waste liquids containing silver ions are often discharged, resulting in a waste of precious metals. With the increasing awareness of environmental protection in recent years, all waste liquids must be treated to meet the standards. emission. Therefore, there is an urgent need for a simple and fast method for treating silver-containing waste liquid and recovering metallic silver. At present, there are mainly the following methods for recovering silver from silver-containing waste liquid: [0003] 1. Zinc reduction method: This is a commonly used method, but the yield is low and the reaction is slow. [0004] 2. Acid treatment method: This method reacts quickly, but the conversion rate is lo...

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): C22B11/00
CPCY02P10/20
Inventor 李军杨俊杰刘俊峰王立云叶卫合马艳辉穆俊豪
Owner XINXING DUCTILE IRON PIPES CO LTD
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com