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| One for the Chemists - water softening solution. |
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| awemawson:
Now that's interesting :thumbup: But google just tells me it's ordinary table salt in a different crystal form - those dendrites ! But makes no mention of water softening applications :scratch: I'm aware that salt is used in the Permuit water softening process , but that is just to pluck the calcium ions off the active resin during the recharge cycle and replace them with sodium ions - I use to order it by the ton for my Launderettes, but the salt per se didn't do the softening it recharged the resin. |
| millwright:
Yes Andrew You are right it re charged the resin, had to go and have a read up on the Permutit site. was thinking back and its 36 yrs ago since the boilers were cut up for scrap. but the permutit softened certainly worked well. John |
| AdeV:
Dishwashers use plain salt to soften water - as far as I know, also by ion-exchange, but AFAIK there's no resin or other component in the softening sytem - certainly nothing consumable? |
| awemawson:
Ade, Dishwashers have a small Permutit system built in, with an active resin that the salt recharges |
| RussellT:
Like others I've forgotten most of the chemistry I've ever learnt, :doh: :doh: but I think so far we're all missing something. If the HCl and NaOH were mixed in exact ratios they wouldn't make it like that - salt would be much cheaper. I suspect there is something else going on relating to how this effects the other ions in tap water. IIRC scale is normally Calcium Carbonate and I think there is something happening that is preventing the scale from coming out of solution. Russell |
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