- Soda ash, slaked lime, boiler
Stock up on the starting materials for the preparation of alkali - caustic soda.1 kg of soda ash grab 0.9 kg of hydrated lime.Prepare a solution of baking soda, which 1 kg of soda is dissolved in 4.5 liters of water.
Place the soda solution into the boiler (you can immediately dissolve the baking soda into the pot for cooking).Heat the liquid to 60 ° C.
The pot pour small amounts of water mixed with slaked lime ("milk of lime").Since the solution at the same foam and can go over the edge, load boiler for two-thirds of its volume.During cooking, stir well fluid;th
e more carefully will stir the liquid, the better the process of transformation to happen in ordinary soda caustic soda.
Heat the resulting mixture for an hour, then let it settle.Pour the clear solution from the precipitate.This clear liquid is a solution of sodium hydroxide or sodium hydroxide, alkali is the most widespread (chemical formula NaOH).The precipitate is not dissolved lime, chalk and some impurities.
After removal of the clear solution to the remaining precipitate add water and boil a few times, and then let stand.Then again, drain the clear liquid that represents the sodium hydroxide solution, but at the fortress.
If the saponification of fat to prepare a soap need a strong alkali , the resulting solution should be evaporated.After evaporation of the water solution of alkali becomes stronger.Accordingly, if your needs require alkali at the fortress, dilute the solution with water.With the described method homemade hydroxide solution of 1 kg of soda ash would be about 0.8 kg final product.
- How to prepare an alkaline solution of potassium