Bio-based 5-HMF is a versatile material with valuable market potentials. As high as 90 % fructose conversion and 93 % 5-HMF selectivity were achieved in a designed water-dioxane-methyl isobutyl ketone (MIBK) system with amberlyst 70 as dehydration catalyst by continuous flow processing. The addition of organic solvent greatly increased the dehydration rate. Furthermore, FTIR analysis demonstrated the higher stability of 5-HMF in this solvent system and thereby reducing the side reactions. The catalyst showed an efficient stability after 10 h in continuous flow at 120 °C without significant change of the catalytic performance.

演者らは動植物性油脂から脱炭酸分解により高品質の炭化水素系バイオディーゼル燃料HiBD（High quality Bio Diesel）を得るための開発を進めている。これはハイドロタルサイト触媒を用いた液相合成法で、長時間安定的に高収率を得ることに成功した。その際、触媒上に析出した炭素量が著しく少ないなど優れた反応系であることが明らかになった。しかし、初期の昇温過程で突沸が起こることが分かったため本研究ではこの現象の解明と対策を試みた。

Utilization of biomass as a renewable organic resource has been developing. There is a large amount of biomass on the earth, so if we can use biomass as a chemical raw material, it may contribute to low carbonization. So far, catalytic reactions that efficiently convert cellulose, hemicellulose and lignin have been extensively studied by many groups, and in some cases starting biomass is advantageous in the synthesis of oxygen-containing compounds such as sugars. In this talk, we will show our recent work on the depolymerization of biomass and the conversion of sugar compounds by heterogeneous catalysts.