Extraction of bixin from annatto seeds using supercritical carbon dioxide

Brazilian Journal of Chemical Engineering

G. F. Silva²  Felix M. C. Gamarra¹  A. L. Oliveira¹  F. A. Cabral¹ 

[1] ,Federal University of Sergipe Department of Chemical Engineering Sergipe SE ,Brazil

关键词: Supercritical carbon dioxide;    Annatto;    Bixa orellana L.;    Bixin;    Solubility;   

DOI  :  10.1590/S0104-66322008000200019

来源: SciELO

【 摘 要 】

The solubility of 93% pure bixin in supercritical carbon dioxide (SC-CO2) and of the bixin present in annatto seeds (Bixa orellana L.) was measured. For the seeds, the measurements were made in a temperature range from 30 to 50ºC and pressure between 10 and 35 MPa and for the pure bixin, at 40ºC from 10 to 35 MPa. The main pigments of annatto seeds are bixin and norbixin, but the extracts only showed the presence of cis and trans-bixin, indicating that norbixin is not soluble in SC-CO2. The annatto seeds used in the experiments contained about 2.7% bixin and 3.1% oil. In the seeds, the crossover point of solubility was at about 28 MPa and values for solubility were about ten times higher than those of the pure bixin, giving evidence that the oil acted as a co-solvent with the CO2.

【 授权许可】

CC BY   
 All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License