Soap Making : Soaps are produced by reactions between fat and sodium hydroxide.
FAT + 2NaOH → Glycerine + 3 Soap (Triglyceride)
The industrial production of soap involves the following 4 steps
- Sopanification in a sigma mixer (Reaction stated above)
- Glycerine removal – same amount of glycerine is left in the soap to make it smooth.
- Soap Purification – Remaining traces of NaOH are neutralized with weak acid.
- Finishing – Addition of colour, perfume, preservatives, converting to desired form, shape.
The reaction is exothermic, and progresses quickly and efficiently at 125°C. The temperature of the soap mass must be carefully controlled as alkali is used up rapidly. Glycerine is extracted from the soap with lye, a brine solution added to the soap during saponification reaction. The lye is then separated out. The remaining glycerine is washed out in the washing column.
The remaining traces of caustic (NaOH) are removed by neutralization with weak acid.
Water levels in the soap should be less than 12% and is removed by drying operation.
Perfume, colour, opacifier, other additives are added to the dried soap. The mixture is milled in a 3 Roll Mill to ensure homogenous mixing, adjust the structure of the crystalline soap particles, so that the soap has a smooth, creamy texture. The soap chips formed after processing in the 3-roll mill are plodded and extruded out as a continuous bar or soap noodles, as desired.
Unique Mixers & Furnaces Pvt Ltd
Contact Person: Mr Jayesh R Tekchandaney
Phone – +91-22-25801214/25822385
Website – www.uniquemixer.com