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Gewählte Master / Diploma Thesis:

Leander Sützl (2015): Analysis of resinous residues.
Master / Diploma Thesis - Abteilung für Chemie nachwachsender Rohstoffe, BOKU-Universität für Bodenkultur, pp 119. UB BOKU obvsg

Data Source: ZID Abstracts
Abstract:
In the last few years, the interest in wood extractives is increasing, as they are potential substituents for petrochemicals and can be used as raw materials in various industries. In the pulp and paper industry, wood extractives have always been relevant. In certain cases they can cause unsatisfactory product quality and on the other hand they add to utilization of byproducts. Additionally it is known that wood extractives, especially sterols, fatty acids and resin acids, are harmful to aquatic organisms, so monitoring and treatment of wastewater effluents from pulp and paper mills has become more important. In this thesis, six samples (A to F) of unknown composition from four collaborating companies were analyzed. Samples A to C were resinous residues collected in the production process and D to F were organic extracts of pulp or wastewater. For the determination of the organic and inorganic content of the samples, a comprehensive approach combining various spectroscopic and chromatographic methods was used. A special focus was set on using High Performance Thin Layer Chromatography (HPTLC) as a simple way to determine single components in a mixture. Samples D to F consisted mainly of typical wood extractives such as resin acids of the abietic and pimaric type and various fatty acids. Samples A to C were very inhomogeneous and showed inorganic contents from 40-70%. Sample A mainly contained palmitic acid and a lot of silicon, originating from additives used in the production process. Sample B showed high amounts of CaCO3, betulin and betulin derivatives. Additionally, an easy purification method for betulin was developed. Sample C consisted mainly of talc that was added during the production process.

Beurteilende(r): Potthast Antje
1.Mitwirkender: Böhmdorfer Stefan

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