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Removing Sodium Carbonate from Copper-Cyanide Plating Baths

I am the chemist for a plating company in Tulsa, OK. The owner of my company has asked me to do some research in order to find the best method for removing sodium carbonate from our copper-cyanide plating tanks. He had read that sodium carbonate can be removed by precipitation with calcium oxide, calcium hydroxide, or calcium sulphate. This information was found in 'Metal Finishing guidebook'. I was wondering if there was any actual procedures on this removal process. Please let me know.

Thank you,

Jennifer Smith
plating company - Tulsa, Oklahoma
2004

The traditional method of removing sodium carbonate is "freezing" because carbonates have low solubility at low temperature. You can read many entries on this topic by using the term "freezing carbonates" in our search engine or the term "site:finishing.com freezing carbonates" at Google or Yahoo.

Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
2004

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