کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4514559 | 1322214 | 2011 | 6 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Polyol production by chemical modification of date seeds Polyol production by chemical modification of date seeds](/preview/png/4514559.png)
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.
Journal: Industrial Crops and Products - Volume 34, Issue 1, July 2011, Pages 1035–1040