Removing metals from organic acid stream???

[nalmeter]

Does anyone have any experience or knowledge of techonology that would enable the removal of metals from a chlorinated organic acid stream. This acid is highly corrosive (Hast-C/Zirc and Tantalum are normal for this service) and using distillation has been looked into, but is not as cost effective due to the materials of construction (at this point it is easier to take a plant outage and purge the system completely - not exactly cheap either not to mention the lost production time). Any thoughts???
Thanks,
nalmeter

 

[moltenmetal]

Much depends on which metals, at what concentrations, to what concentrations etc. The nature of the acid matters greatly also. Ion exchange or solvent extraction may or may not be options depending on your answers.

 

[nalmeter]

We would want to remove a broad range of metals, mainly:
Sodium from ~300-500ppm to <150ppm
Molybdenum from ~100-200ppm to <50ppm

others are potassium, chromium and nickel

All these are mainly due to corrosion in the system. They accumulate over time and contaminate the system.

 

[hacksaw]

Combustion is the usual trick at where you cannot neutralize and/or precipitate the metals.

 

[aumet]

What is the nature of the organic acid. What is the acid concentration?