The authoritative public forum
  for Metal Finishing since 1989
  

  -----

Electrodialysis for aluminum removal from caustic solution

I am interested in information regarding the use of electrodialysis to recycle spent caustic soda ⇦liquid caustic soda in bulk on Amazon [affil link] used to clean aluminium extrusion dies. Can this method be applied to remove the dissolved aluminium from the solution, along with other impurities, so that the spent caustic can be re-used. We have two 900L tanks which dissolve about 20kg each of aluminium prior to disposal (both tanks are emptied daily). Recovery of the aluminium is not a priority at this stage as a majority of cost goes towards purchase and disposal of caustic.

Any help on this topic would be greatly appreciated.

Thank you,

Jim Pejoski
- Canning Vale, Western Australia

---

Can't help with aluminium recovery but would be very interested to know of safe and environmentally friendly methods of removing aluminium from dies, etc. Can any one help? Is there any proprietary equipment available?

Thanks,

Kennneth Scott
machinery - Bournemouth, UK

---

soy estudiante de la universidad nacional del centro de la facultad de ingenieria quimica, estoy realizando mi tesis . con el tema principal del metodo de electrodialisis , y hasta el mopmento splo tengo la teoria y lo que necesito es la menbrana bipolar para realizar las pruebas , aqui en el peru no existe este tipo dde menbranas , por lo que me encuentro en stand by con el proyecto . agradaceria mucho si alguno de ustedes podria proporcionarmelo.

gracias.

EDGAR LIZARME BERROCAL
- huancayo - el tambo - peru

---

I am also very interested in the subject mentioned by Mr.Jim Pejoski (Canning Vale, Western Australia) in this thread chain. I was wondering if Mr. Pejoski has received any solution to the case in disposal of spent caustic soda that is used to clean aluminium extrusion. Please kindly reply for further discussion.

Thank you.

Regards,

Antonius Suhanto
- Jakarta, Indonesia

---

I am also interested in knowing about the method of recovering aluminium from caustic soda ⇦liquid caustic soda in bulk on Amazon [affil link]
thanks

Syed Hussain
- Kuwait
September 30, 2010