Date of Award
Bachelor of Science
Paper Science and Engineering
Furfural was obtained in significant amounts by the action of mineral acid on pentose sugars. Pentose sugars are present in Sulfite Spent Liquors because of the hydrolysis which takes place during the pulping. The dehydrating action of the acid on the pentoses takes place during the pulping. The dehydrating action of the acid on the pentoses takes place at about 100 degrees Centrigrade. The furfural was distilled from the raw acidified spent liquor and can be purified further by fractional distillation. Hardwood Sulfite Spent Liquors gave the highest yields. This is because hardwoods contain more five carbon sugars. A magnesium base bisulfite cook gave the highest yield with a calcium base acid cook in second place.
Keiser, Dale, "The Potential Production of Furfural from Sulfite Spent Liquors" (1960). Paper Engineering Senior Theses. 166.