Aluminum removal from spent acid, acid recovery process.
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Typically, the acid waste from anodizing rinsing has an acid concentration of around 17–25%, with an aluminum content of 10–15 g/L. Traditional treatment processes generally involve neutralization and precipitation, as well as the transfer of sludge waste, which not only wastes aluminum resources and acid resources but is also costly. Currently, special resins are used in such acidic environments for the extraction and recovery of aluminum; by means of evaporation under negative pressure at the end of the process, the acid concentration can be increased back to over 70%. This approach allows for both the recovery of aluminum and the recovery of acid, and it is a simple and stable process that aligns with the current trend toward reducing sludge volume and achieving resource recovery. The technology has proven track records of successful operation in large-scale projects.
With such a high concentration of acid after concentration, can your resin withstand it?
Blow it? One deceived is one.
Haha, only silicon carbide ceramic membranes can handle strong acids
:) If you’re interested and have time, you can visit the site; just ask whatever you want.
The usage cannot be disclosed. The process uses membranes.
I knew right away that membranes would be used since you said so.
Yes, depending on the type of acid, membranes made of different materials are used. The front end will be purified or recycled using resin.
This post was last edited by Pei Qinghua on 2019-7-10 at 16:16. The membrane equipment produced by our company can efficiently recover this type of waste acid; if you are interested, feel free to contact me via internal messaging