کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
643259 884364 2009 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effects of entrainers on the purity of andrographolide extracted from andrographolide raw material by SC-CO2
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی تصفیه و جداسازی
پیش نمایش صفحه اول مقاله
Effects of entrainers on the purity of andrographolide extracted from andrographolide raw material by SC-CO2
چکیده انگلیسی

The effects of the addition of non-toxic entrainers (ethanol, water, and acetic acid) in supercritical carbon dioxide (SC-CO2) extractions from andrographolide raw material were investigated. The extraction efficiency was improved by the addition of any of the three entrainers. Various temperatures (40, 55, and 70 °C) and pressures (8, 16, and 24 MPa) for the modified extraction processes were also compared. The highest purity was achieved at the highest temperature (70 °C) and highest pressure (24 MPa). For the three single entrainers, purities increased with increasing amounts (from 5% to 10%) of the entrainers. The highest purity was obtained with 10% acetic acid at 70 °C. SEM results showed that the crystal is the shortest and thinnest and XRD results showed that the highest crystallinity crystals were obtained when acetic acid was used as entrainer.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Separation and Purification Technology - Volume 70, Issue 2, 10 December 2009, Pages 207–211
نویسندگان
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