Check patentability & draft patents in minutes with Patsnap Eureka AI!

Novel method and device for recovering metal palladium

A kind of metal palladium, the technology of the new method is applied in the field of recovering metal palladium, the method and the special device, and achieves the effect of multiple economic benefits

Pending Publication Date: 2022-03-01
SHENZHEN ZHONGKE OUTAIHUA ENVIRONMENTAL PROTECTION TECH
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, so far, there is no practical way to recycle the technology

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
  • Novel method and device for recovering metal palladium

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Such as figure 1 Shown, the device that a kind of new method that the present invention reclaims metallic palladium adopts, comprises the waste liquid tank 1 that is connected successively, reaction tank 2, sedimentation filter tank 3, delivery pump 4, electrolyzer 5; Reaction tank 2 and hydroxyl free radical The generator 6 is connected, and the precipitation filter tank 3 is connected with the alkali solution tank 7 and the acid solution tank 8 respectively.

[0027] Wherein, the reaction tank 2 is provided with a first waste liquid inlet and an oxidant dosing port; the sedimentation filter tank 3 is provided with a second waste liquid inlet, an lye dosing port and an acid liquid dosing port; A third waste liquid inlet and a waste liquid discharge port are arranged on it; a stirrer 9 is arranged in the reaction pool 2 .

Embodiment 2

[0029] A kind of new method of reclaiming metal palladium adopts the device of embodiment 1 to process, specifically comprises the steps:

[0030] (A) the waste liquid containing colloidal palladium of circuit board production line is sent into waste liquid tank 1 and concentrates;

[0031] (B) Send the waste liquid of waste liquid tank 1 into reaction tank 2, adopt hydroxyl radical generator 6 to add oxidizing agent online, carry out oxidation reaction under stirring, destroy the particle structure of colloidal palladium, make it form ion palladium and ion Tin; the oxidizing agent is hydroxyl radical, the dosage is 21g / t waste liquid, and the reaction stirring time after adding hydroxyl radical is 2 hours.

[0032] (C) Send the waste liquid from the reaction tank 2 into the sedimentation filter tank 3, add 10% lye online, control the pH value of the waste liquid ≥ 8, realize almost complete precipitation of the ionic tin, and remove the ionic tin by filtering and separating; ...

Embodiment 3

[0036] The difference from Example 2 is: the dosage of hydroxyl radicals in step (B) is 22 g / t waste liquid, and the reaction stirring time after adding hydroxyl radicals is 1.9 hours. Others are identical with embodiment 2.

[0037] After electrolysis, the waste liquid was sampled and tested: the recovery rate of palladium was 94.5%.

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 a novel method for recovering metal palladium. The novel method comprises the following steps: (A) feeding waste liquid into a waste liquid pool; (B) feeding the waste liquid into a reaction tank, and adding hydroxyl radicals on line to carry out oxidation reaction; (C) feeding the waste liquid into a precipitation filter tank, and adding alkali liquor or acid liquor; and (D) feeding the waste liquid into an electrolytic bath, electrolyzing, recovering metal palladium, and feeding the electrolyzed waste liquid into a sewage plant for treatment. According to the novel method, the defects of an original physical recovery method are thoroughly changed, a chemical method is adopted, colloid palladium in the method is broken, and ion palladium is recovered into metal palladium.

Description

technical field [0001] The invention relates to the field of PCBs, in particular to a method and a special device for recovering metal palladium. Background technique [0002] In the construction of the national economy, PCB is the basic industry for the development of industrialization and informationization. With the continuous development of economic construction, the PCB industry has also developed rapidly. Palladium will be produced in the process of electroless copper plating and electroless gold plating in normal circuit board production, and basically exists in the waste liquid in the form of colloidal palladium. Therefore, the recovery of palladium must start with colloidal palladium. At present, although colloidal palladium can be effectively recovered through physical methods, the high cost directly affects the efficiency of recovery, which has become a difficult point in colloidal palladium recovery technology and a key problem that enterprises have always wanted...

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): C22B7/00C22B11/00C25C1/20C25C7/00
CPCC22B7/006C22B11/046C25C1/20C25C7/00Y02P10/20
Inventor 王小广陈祥衡吴渤石杨李明军王青龙徐若飞
Owner SHENZHEN ZHONGKE OUTAIHUA ENVIRONMENTAL PROTECTION TECH
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