We currently want want to make NaOH solution from sodium hydroxide flakes which we already have, we use caustic soda for making sodium hypochlorite. I have conducted experiments on the lab scale and it's possible. We use 45% mass per volume of NaOH solution. Does anyone have literature on this practice, I see most industries use electrolysis of brine.
Why don't buy soda solution? NaOH dissolution is exotermic and the best method is to prepare the solution using dilute NaOH solution with good agitation and cooling. Soda flake came from soda solution generated by eletrolysis of NaCl, that results in chlorine and soda solution. This solution has to be concentrated first to then be transformed in flakes.
Dear Silas,
The problem is that we will be running short of the NaOH solution which we get from our supplier. We buy and sell NaOH (45 &50%) and we also use it to make sodium hypochlorite and we are the biggest producer in the province we are running short of NaOH solution so we thought about using Flakes because we do have them since we are a chemicals distribution company as well. We will not have Caustic for 6 months we definitely need to do something to meet the demand.
I found these, hope it can help you:
[PDF]Caustic Soda
www.jsia.gr.jp/data/handling_01e.pdf
(http://www.jsia.gr.jp/data/handling_01e.pdf)
Heat of Dissolution of Caustic Soda in Water ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯ 18. 5. .... ・Flake caustic soda is contained in drums or PVC-lined paper bags as shown in.
Solid caustic soda - Dissolving - Solvay Chemicals
www.solvaychemicals.com/...soda/DOC-1120-0005-...
(http://www.solvaychemicals.com/Chemicals%20Literature%20Documents/Caustic_soda/DOC-1120-0005-W-EN_WW_.pdf)
SOLID CAUSTIC SODA - DISSOLVING. Solvay Chemicals International SA. Rue de Ransbeek 310. B - 1120 Brussels. Brussels, RPM 0406804736. +32 2 264 ...
The unit operations and chemical conversion for the production of caustic soda can be obtained from Shreve's Chemical Process Industries, Fifth Edition by George T Austin, McGraw-Hill International Edition. The optimization of the evaporation process gives high yield of the NaOH flakes.
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