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Pastimes : Don't Ask Rambi
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To: Gauguin who wrote (33859)8/1/1999 3:52:00 PM
From: Jacques Chitte  Read Replies (2) of 71178
 
I have been pondering the salt question. Questions. I just want to dip my toe into the brine and talk about making bleach.
Yes, salt and water are the feedstocks. But what is done is called "the chlor-alkali process". Stick two big electrodes into sodium chloride solution, apply DC and you get electrolysis. The chloride ion turns to chlorine gas - which bubbles out. The sodium turns to sodium metal - and this reacts at once with water to make sodium hydroxide (alkali) and hydrogen gas.

If you bubble the chlorine into the alkali, you get chlorine bleach. Since all that was really removed is hydrogen, you have salt water with bound oxygen. NaCl was turned inty NaOCl, the active in bleach.

The chlor-alkali process is big big business. A lot is done in the Gulf, where salt and energy (to drive the electrochemical process) are cheap.
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