Acid-activation assisted by microwave of a Brazilian bentonite and its activity in the bleaching of soybean oil

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• 作者：Edson Luiz Foletto ; Diego Silva Paz ; Andr¨¦ G¨¹ndel
• 关键词：Bentonite ; Microwave ; Bleaching ; Soybean oil ; Mechanism
• 刊名：Applied Clay Science
• 出版年：2013
• 出版时间：October, 2013
• 年：2013
• 卷：83-84
• 期：Complete
• 页码：63-67
• 全文大小：577 K

文摘

In this work, a bentonite clay from Brazil was activated with H₂SO₄ (6 N) by microwave operating at different powers for 15 min. Physical and structural changes on the clay were observed after the microwave treatment. These changes were measured by X-ray diffraction (XRD), specific surface area (SSA) and atomic force microscopy (AFM) techniques. The bleaching capacity of each sample for the alkali-refined soybean oil was determined. It was observed that the average pore size of clay particles showed some contribution on the oil bleaching capacity, and that is not associated with maximum SSA. A mechanism of soybean oil bleaching by ¦Â-carotene molecule adsorption into particle pore of bentonite was proposed.