Utilization of pressurized CO2, pressurized ethanol and CO2-expanded ethanol mixtures for de-oiling spent bleaching earths
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چکیده
منابع مشابه
Supercritical CO2 Extraction of Ethanol
Extraction of ethanol was studied from both synthetic ethanol solution and fermentation broth using supercritical CO2 in an extraction apparatus in ranges of 313 to 333 K and 80 to 160 atmospheres, for varying extraction times. The experimental system consists mainly of four parts: a CO 2 storage system, a high-pressure liquid pump, an extractor and a product collection unit. Samples were analy...
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Carotenoids are known for their antioxidant activity and health promoting effects. One of the richest sources of carotenoids are carrots. However, about 25% of the annual production is regarded as by-products due to strict market policies. The aim of this study was to extract carotenoids from those by-products. Conventional carotenoid extraction methods require the use of organic solvents, whic...
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زخم های فشاری، یکی از عوارض ناخواسته درمانی بوده و اکثراً با درک هوشیاری و مراقبت بموقع قابل پیشگیری است. امروزه زخم های فشاری یا زخم بستر یکی از مسائل بغرنج درمانی محسوب می شود و این مسئله تا حد زیادی مربوط به این واقعیت است که، تعداد بسیاری از بیماران سالخورده از بیماری های جدی و حاد جان سالم بدر برده ولی به علت سالخوردگی و پاتولوژی عوامل چندگانه بیشتر در معرض ابتلاء به زخم های بستر می باشند.
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28 In the present work, two extraction techniques and two green solvents have 29 been tested to obtain γ-linolenic acid (GLnA)-enriched fractions from Arthrospira 30 platensis (Spirulina). Expanded ethanol with supercritical CO2 (Gas Expanded 31 Liquid Extraction, GXL) and Pressurized liquid extraction (PLE) using mixtures 32 of ethanol:ethyl lactate were tested and optimized chemometrically. R...
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Pulsed laser ablation (PLA) has become a promising method for the synthesis of nanoclusters for photonics, electronics and medicine. In this work PLA in pressurized CO2 has been applied for fabrication of gold and silver nanoparticles. Laser ablation was performed with an excitation wavelength of 532 nm under various pressures (0.1–20MPa), temperatures (40–80 C) of CO2 medium and ablation times...
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ژورنال
عنوان ژورنال: The Journal of Supercritical Fluids
سال: 2019
ISSN: 0896-8446
DOI: 10.1016/j.supflu.2019.03.016