کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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4289 | 219 | 2009 | 6 صفحه PDF | دانلود رایگان |

Laboratory-scale experiments were conducted with the goal of releasing ferulic acid (FA) and p-coumaric acids (p-CA) from the solid residue obtained after prehydrolysis of prunings of vine shoots. Firstly, an alkaline hydrolysis with different hydroxides at mild conditions of temperature (35 °C) was performed, followed by acidification of liquors, and liquid–liquid extraction with ethyl acetate. The influence of two operational variables was tested on three levels in a 9 factorial design. The independent variables were the type of hydroxide (3N NH4OH, KOH or NaOH) and pH in the range 1.5–7.5. Under the optima conditions (3N KOH, pH 2.88), 228.6 mg FA/L, 0.41 mg FA/g vine shoots, 102.6 mg p-CA/L, and 0.147 mg p-CA/g vine shoots, were achieved.
Journal: Biochemical Engineering Journal - Volume 43, Issue 2, 15 February 2009, Pages 129–134