Method for preparing high-purity copper oxide by adopting acidic etching waste liquor

A technology of acidic etching waste liquid and etching waste liquid, applied in chemical instruments and methods, copper oxide/copper hydroxide, water/sewage multi-stage treatment, etc., can solve problems such as uneven temperature rise, increased cost, and difficult heat conduction. Achieve good environmental protection effect and achieve zero emission effect

Inactive Publication Date: 2011-01-05
昆山联鼎环保科技有限公司
View PDF7 Cites 19 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage is that the produced copper hydroxide is viscous and gelatinous, difficult to stir and conduct heat (uneven temperature rise), so the acidic etching waste liquid needs to be diluted before it can be operated.
However, afte

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 preparing high-purity copper oxide by adopting acidic etching waste liquor
  • Method for preparing high-purity copper oxide by adopting acidic etching waste liquor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0018] The preferred embodiment of the present invention will be described in detail below in conjunction with the accompanying drawings by taking the acid copper chloride etching waste solution (its composition: copper 145g / L, hydrochloric acid 12%) as an example.

[0019] step:

[0020] 1) Neutralization: The acidic copper chloride etching waste liquid of the printed board manufacturer is filtered to remove insoluble solid impurities, and then injected into 30-35% (weight percent) sodium hydroxide solution at an initial temperature of 40-60 ° C, hydrogen The sodium oxide solution is continuously stirred, and the end point pH is ≥ 8.0. When the acid solution is injected, copper hydroxide is produced, and immediately dehydrated at a temperature of 40-60 ° C to form copper oxide in a muddy state, and the reaction process has been maintained at a pH ≥ 8.0. The muddy copper oxide is located in the lower layer, and the upper layer is the neutralizing solution after the reaction. ...

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 method for preparing high-purity copper oxide by adopting acidic etching waste liquor, comprising the following steps of: (1) injecting acidic copper chloride etching waste liquor into 30-35% (by weight) sodium hydroxide solution at the temperature of 40-60 DEG C to generate copper oxide; (2) cleaning the copper oxide; (3) drying and sintering the copper oxide at 100-300 DEG C to obtain acicular crystal copper oxide with purity higher than 99.0%; and (4) mixing and heating a neutralization solution generated from the step (1) and a cleaning solution generated from the step (3), and evaporating and crystallizing to obtain industrial salt and distilled water. The method can be used for effectively recovering the copper contained in the acidic copper chloride etching waste liquor to generate the high-precision copper oxide, and the neutralization solution and the cleaning solution can be heated, evaporated and crystallized to form the industrial salt and the distilled water, therefore, the method realizes the zero draining of waste water and has very good environmental-friendly effect.

Description

technical field [0001] The invention relates to a method for recycling waste liquid, in particular to a method for preparing high-purity copper oxide by using acidic etching waste liquid. Background technique [0002] At present, the production of printed boards has formed a large-scale industry in my country, with an annual output of 200 million m 2 , The production of printed boards produces a large amount of etching waste liquid. The printed board etching liquids mainly include alkaline etching liquid and acidic etching liquid. The total amount of copper contained in the etching waste liquid is about 50,000 tons per year. These etching waste liquids have the characteristics of various types, high toxicity, and strong corrosiveness. They belong to the national first-class hazardous waste. If they are discharged without treatment, they will cause extremely serious damage to the ecology, and even seriously threaten people's lives. If a large amount of waste liquid cannot be...

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): C01G3/02C02F9/10
Inventor 江德馨庄仓宏纪铭郁
Owner 昆山联鼎环保科技有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap