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Gewählte Master / Diploma Thesis:

Luis Pérez Berrocal (2013): SUPERCRITICAL CO2 EXTRACTION OF WHEAT BRAN OILS.
Master / Diploma Thesis - Institut für Lebensmittelwissenschaften, BOKU-Universität für Bodenkultur, pp 102. UB BOKU obvsg FullText

Data Source: ZID Abstracts
Abstract:
Supercritical CO2 extraction is an innovative type of extraction that has been successfully used in many occasions to extract oils, flavours and other compounds out of a wide range of raw materials. One of the most remarkable advantages of this type of extraction is that, unlike other organic solvents used commonly in the industry, CO2 is a non-toxic substance that leaves no traces in the extract or the by-product, since it gets evaporated soon after the extraction is finished. Its main disadvantages nowadays are the efficiency and price of the equipment, as well as the impossibility to perform extractions in a continuous manner, which hinders its possibilities to find an application in the industry. Wheat bran oil can be an interesting product with commercial applications, such as a source of antioxidants for cosmetic industry, or as complement to human diet due to its high abundance in polyunsaturated fatty acids (56%) and substances as tocopherols and tocotrienols (15mg/100g oil), sterols and stanols (2g/100g oil). Moreover, together with the oil, some by-products are obtained, such as a waxy phase rich in alkylresorcinols and defatted bran that can be used as a high-value feed source for animals, rich in fibre and protein and low in fat. However, this technology may not be the most convenient to obtain wheat bran oil since several issues appeared during and after the extraction, mostly due to some fractions of the extract remaining stuck to the walls of the separator making it impossible for them to be collected and making the oil yields too inconsistent to allow a detailed analysis of them.

Beurteilende(r): Schreiner Matthias
1.Mitwirkender: Petrasch Angelika

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