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

Method for preparing arsenic trioxide from black copper sludge

A technology of arsenic trioxide and black copper mud, applied in chemical instruments and methods, arsenic compounds, inorganic chemistry, etc., can solve the problems of long process flow, high cost, secondary pollution of solid waste, etc. of arsenic trioxide, so as to avoid secondary pollution. , The effect of low production cost and low equipment requirements

Inactive Publication Date: 2013-09-11
LANZHOU UNIVERSITY OF TECHNOLOGY
View PDF10 Cites 11 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The process of producing arsenic trioxide is lengthy and costly
At the same time, a large amount of arsenic-containing calcium sulfate waste residue is produced, causing secondary pollution of solid waste

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 arsenic trioxide from black copper sludge

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Take black copper mud (content: Cu41.92%, As22.40%, Sb6.60%, Fe0.10%) 30g, according to the liquid-solid ratio is 8:1, the concentration of sodium hydroxide solution is 2mol / L, prepare After the solution is finished, when the temperature rises to 95°C, black copper mud is added to the solution, and air is introduced to control the air volume to 0.8m 3 / h, stirred and leached for 6 hours, added sulfuric acid to the filtrate after filtration to adjust pH=-1, passed SO into the solution 2 After reacting for 2 hours, the solution was evaporated, concentrated and crystallized to obtain a precipitate, which was washed and dried to obtain the arsenic trioxide product. The purity of arsenic trioxide is 95.78%, reaching the product quality standard of YS-T99-1997.

Embodiment 2

[0029] Get black copper mud (content is: Cu41.92%, As22.40%, Sb6.60%, Fe0.10%) 30g, be 8: 1 by liquid-solid ratio, sodium hydroxide solution concentration is 1.5mol / L, Prepare the solution, and when the temperature rises to 85°C, add black copper mud to the solution, and let air in, and control the air volume to 0.6m 3 / h, stirred and leached for 8 hours, added sulfuric acid to the filtrate after filtration to adjust pH=0, passed SO into the solution 2 After reacting for 1 hour, the solution was evaporated, concentrated and crystallized to obtain a precipitate, which was washed and dried to obtain the arsenic trioxide product. The purity of arsenic trioxide is 96.23%, reaching the product quality standard of YS-T99-1997.

Embodiment 3

[0031] Get black copper mud (content is: Cu41.92%, As22.40%, Sb6.60%, Fe0.10%) 30g, be 8: 1 by liquid-solid ratio, sodium hydroxide solution concentration is 1.5mol / L, Prepare the solution, and when the temperature rises to 90°C, add black copper mud to the solution, and let air in, and control the air volume to 0.6m 3 / h, stirred and leached for 8 hours, added sulfuric acid to the filtrate after filtration to adjust pH=0, passed SO into the solution 2 After reacting for 2 hours, the solution was evaporated, concentrated and crystallized to obtain a precipitate, which was washed and dried to obtain the arsenic trioxide product. The purity of arsenic trioxide is 97.51%, reaching the product quality standard of YS-T99-1997.

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 arsenic trioxide from black copper sludge, and aims to prevent a lot of arsenic-containing calcium sulfate waste residues generated by preparing arsenic trioxide from the black copper sludge from causing secondary pollution to the environment, simplify the process flow and reduce the production cost. The method comprises the following steps of: (1) preparing the black copper sludge into a leaching agent by using sodium hydroxide, namely, putting the black copper sludge into a sodium hydroxide solution in a liquid-solid ratio (ml / g) of 8:1 to 12:1, and stirring for 4-8 hours, wherein the concentration of the sodium hydroxide solution is 1-2mol / L, the temperature is 80-95 DEG C, and the amount of introduced air is 0.5-0.8m<3> / h; (2) adjusting the pH value of the leaching agent obtained in the step (1) to be -1 to 1 by using sulfuric acid, introducing sulfur dioxide gas for reduction for 1-2 hours, and evaporating, concentrating and crystallizing the solution after reduction to obtain a deposit; and (3) washing and drying the deposit obtained in the step (2) to obtain an arsenic trioxide product.

Description

technical field [0001] The invention relates to a method for preparing arsenic trioxide with arsenic-containing industrial waste residue. Background technique [0002] Black copper mud is the mud produced on the cathode when the copper electrolyte is purified and electrowinning to remove copper and impurities, and contains a large amount of valuable metals such as Cu, As, Sb, Bi, and Fe. The metal content in black copper mud is about 42-51% copper, 17-28% arsenic, 2-7% antimony, 1-3% bismuth, and 0.05-0.2% iron. At present, because there is no better way to deal with arsenic-containing waste residues, most enterprises stockpile them. Such arsenic-containing waste residues will pollute soil and rivers, seriously endanger people's health, and also cause the loss of valuable metals. In order to prevent secondary pollution and recover valuable metals, it is necessary to comprehensively utilize arsenic-containing waste residue. [0003] Arsenic trioxide is a very important chem...

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): C01G28/00
Inventor 王玉棉于熙广王胜黄辉荣王大辉吴文明田荣惠周兴黄雁
Owner LANZHOU UNIVERSITY OF TECHNOLOGY
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