Caustic Recovery

[Moose11]

I am looking at cleaning up several caustic streams for reuse. We are going to use MF and/or UF membranes for organics and solids, but we would like to also remove chlorides. We have approximately 30 gpm of a 4% caustic stream to work with (100 - 120 'F).

I have only seen on outfit claiming they can do this using special IX methods. Any suggestions would be appreciated

 

[cub3bead]

Allied Chemical developed an electrodialysis process variation with bipolar membranes several years ago that may help you out with your problem. There are two product streams; one acidic and one basic.

I have lost track of who owns the technology now. This may be you only alternative to the IX process.

Good luck.