DEVELOPMENT OF BIO-BASED PRODUCT FOR FOOD: HYDROGENATION OF XYLOSE TO XYLITOL AND NON-FOOD: MODIFICATION OF PINE ROSIN FOR ROAD MARKING PAINT BINDER

• Main Author: Siddiq, Lathifuddin
• Format: Theses
• Language: Indonesia
• Subjects: Teknik kimia
• Online Access: https://digilib.itb.ac.id/gdl/view/75908
• Institution: Institut Teknologi Bandung

Xylitol is an important sugar alcohol in the pharmaceutical and food industries, particularly as a sucrose substitute, as it has the same level of sweetness but does not require insulin in its metabolism and has low calorie content. Xylitol is typically produced by hydrogenating xylose using hydrogen gas at high pressure, which makes the production costly and environmentally unfriendly. An alternative method for xylitol production follows nature's guidance by hydrogenating without hydrogen gas, but through catalytic transfer hydrogenation, which is performed by aldose reductase enzymes that help reduce monosaccharides to sugar alcohols at room conditions. Literature research indicates several candidate catalysts that mimic the enzyme's working mechanism (biomimetic), namely (NixFe1-x)MoS4, Fe3S4, and (NipFe1- p)(CrqFe1-q)2S4, using formic acid as the hydrogen donor. The first objective of the research is to obtain evidence or experimental test-based affirmation of the activity of catalyst candidates and gain an understanding of the effect of reaction operating conditions on the effectiveness of the catalysts that pass the experimental test. The testing is conducted by adding the catalyst to a xylose solution supplemented with formic acid and triethylamine, adjusting the mixture's pH to 6, and refluxing the mixture under atmospheric conditions (~95°C) for 6 hours. The reflux condenser peak is connected to a gas washing bottle to capture CO2. The reaction mixture is then analyzed using HPLC to determine xylose conversion and xylitol yield. HPLC analysis provides xylose conversion results ranging from 2.7% to 27.5% for various catalyst candidates. The final product obtained is not yet precisely known, but there are two possibilities, xylitan or xylulose. The second objective of this research is to gain understanding through the development of pine rose as a road marking binder. The method used to achieve the second objective is by conducting a literature review.