Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
4514559 | Industrial Crops and Products | 2011 | 6 Pages |
Polyol production from chemical modification of date seeds has been investigated through oxypropylation and liquefaction techniques (using organic solvents in the presence of a catalyst). The obtained products were characterized using infrared spectroscopy analysis, 1H NMR, thermogravimetric analysis and other parameters such as hydroxyl number (IOH) and viscosity. Results showed that 93% of the solid substance was converted into polyol in the oxypropylation reaction at the date seeds/propylene oxide ratio of 0.25 and 10% potassium hydroxide at 160 °C. The oxypropylated product has IOH of 779 mg KOH/g and viscosity of 6.9 Pa s. Regarding the liquefaction technique, results show that a yield of 95% was obtained at the date seeds/liquefying solvent ratio of 0.25 in 60 min of reaction at 160 °C. The liquefied product shows IOH of 336 mg KOH/g and viscosity of 0.9 Pa s.
► Polyol production from chemical modification of date seeds has been investigated. ► Oxypropylation and liquefaction techniques were used to modify date seeds. ► Products were characterized using instrumental methods and rheological parameters. ► Several useful applications could be prepared from the produced polyols.