Title:
Optimisation of Antisolvent Precipitation Method to Obtain Colloidal Particles from Ethanol Solutions from Birch Outer Bark Extractives
Author(s):
Berzins, R., Paze, A., Vitolina, S., Rizikovs, J., Teresko, A.
Document(s):
Paper
Poster
Abstract:
The aim of this study was to determine the possibility of using birch outer bark (BOB) ethanol solution for obtaining microparticles by optimizing the antisolvent precipitation method and investigating the effect of different process parameters manly on particle size. Experimental activities are focused on optimizing the raw material preparation, obtained suspension concentration process and precipitation process approaches. It was determined that the precipitation approach of adding BOB extractives ethanol solution to stationary water and performing the obtained suspension concentration by filtration in the most optimal to obtain < 200 nm average size particles in hydrogel and in colloidal suspension or filtrate. During the study - ethanol dilution with water (CEtOH), concentration of extractives in ethanol (Cex) and water temperature (TH2O) - precipitation parameter investigation was done. Significant was the interaction between CEtOH and TH2O factors. Average particle size of <120 nm in filtrate is obtained if precipitation is carried out at 80 °C water temperature and 18-20 vol% ethanol dilution and vice versa 20-25 °C water temperature and 10-12 vol% ethanol dilution, must be applied to obtain <200 nm particles in hydrogel.
Keywords:
biorefining, ethanol, biobased products, dry matter, precipitation, birch bark, colloidal particles, triterpenes
Topic:
Biomass Conversion to Bio-Based Products and Chemicals
Subtopic:
Co-production of biofuels and biochemicals
Event:
31st European Biomass Conference and Exhibition
Session:
6CV.9.1
Pages:
1117 - 1120
ISBN:
978-88-89407-23-3
Paper DOI:
10.5071/31stEUBCE2023-6CV.9.1
Price:
FREE
