Supercritical extraction of volatile oils from Achyrocline sautereioides (Macel) and Vetiveria zizanioides (Vetiver): determination of extraction kinectics and cost of manufacturing estimation

Author(s)

Claudia Monica Cabral de Vasconcellos

• Document type: Master's Dissertation
• Press: Campinas, SP.
• Institution: Universidade Estadual de Campinas (UNICAMP). Faculdade de Engenharia de Alimentos
• Defense date: 2007-07-30

Examining board members

Maria Angela de Almeida Meireles Petenate; Eduardo Augusto Caldas Batista; Paulo de Tarso Vieira e Rosa; Silvania Regina Mendes Moreschi

• Advisor: Maria Angela de Almeida Meireles Petenate

Abstract

In this work, the kinetic behavior and manufacture costs of vegetal extract processed by supercritical technology were studied. The kinetic parameters of the process in different conditions of temperature and pressure were determined, the chemical composition of extracts was evaluated and the manufacture costs were estimated. Two plants were studied: Achyrocline satureioides (Macela) and Vetiveria zizanioides (Vetiver). The manufacture cost of the vetiver oil presented great influence of the extraction time, resulting in lower costs for lower extraction cycles. Due to the high required investment in the extraction plant and low cost of the raw material, it was expected that the minimum cost of manufacture coincided with the tCER. Thus, as considering vetiver extraction process significant part of the extract it is obtained in the first minutes of the process, the lower costs of manufacture occur with lower cycles of extraction. The estimate of manufacture costs resulted in values as low as 24 US$/kg of extract (AU)