- Improved yield of soap - even 10%
- Improved quality of the soap
- Easier and improved separation of soap
- Need for oil or silicon-based defoamers is eliminated
- More stable process
- Low investment costs – minor changes into the process
- Pulp production
- Process device manufacturing
- Chemical production
Our technology prevents foaming of black liquor originating from the pulp mill process. The method is based on the addition of colloidal neutral substances to the black liquor – β -sitosterol molecules are used as neutral substances. The neutral substances can be produced by separating them from the soap recovered from the pulp mill. The effect of the neutral substances is to convert the fatty acid or resin acid soap micelles into liquid crystal phase. This reduces foaming and decreases the stability of foams. Foaming is also decreased because of less soap in the solution. Method to destabilize foams will work with small amounts of neutral substance colloids. It is enough that the concentration in the upper layer of liquid is sufficient.
The most important benefit of the method is improved quality of the soap obtained from the process. The soap contains a smaller concentration of black liquor and fibers than using traditional methods. In addition, soap yield is improved by up to 10 %. The need for oil or silicon-based defoamers is eliminated. The process as a whole is more stable as a result of reduced foaming. Investment cost is low and the need for changes in the overall process is small.
Download Tech-sheet: Tech Sheet 336
Technology has been verified successfully in a laboratory and mill scale.
FI 122628 - 30.04.2012
Lic.Tech. Esa Pirttinen, Professor Per Stenius, Professor Tapani Vuorinen
Department of Forest Products Technology
Phone: +358 50 3397534