NaOH Getting Cold
NaOH Getting Cold
(OP)
I am using 50% strength caustic soda with a dosing unit. The caustic is outdoors and is in a region where outside air temps will drop below 10 degrees C.
What is common practice to keep the liquid warm.
I have read somewhere in the past that in colder climates that the concentration should be reduced to 25% - why is this and why does it change the temperature range?
Thanks
What is common practice to keep the liquid warm.
I have read somewhere in the past that in colder climates that the concentration should be reduced to 25% - why is this and why does it change the temperature range?
Thanks





RE: NaOH Getting Cold
By diluting the caustic to 25% lowers the freezing point to -12 C. Diluting to 19% lowers it to -28 C.
A good reference for caustic soda can be found at
http://www.oxychem.com/products/handbooks/caustic.pdf
RE: NaOH Getting Cold
Can you point me in the direction of tank heaters? Are they simple submersible units or are you talking a specially designed tank with heating coils?
Thanks
RE: NaOH Getting Cold
A couple of thoughts though, you might try a bung insertion heater like Ogden manufactures or a flexible strap on type such as Watlow makes. Two web referrences follow. I would suggest that you contact them directly and confirm suitablility for the intended service.
http://www.thomasregister.com/olc/47901558/proces7x.htm
http://www.watlow.com/products/heaters/ht_flex.cfm
Good luck and let me know how things work out.
RE: NaOH Getting Cold
I have seen somekind of electric-heated clothes which can be used for heating in cold climete. Clothes are for small barrels (at least up to 200 litres) and for valves. Anyway this is propably not the best alternative for you but i think you should also think ouside heating as one option.
RE: NaOH Getting Cold
RE: NaOH Getting Cold
saxon