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Performance of a Packed Column for Continuous Supercritical Carbon Dioxide Processing of Anhydrous Milk Fat
Author(s) -
Bhaskar Ajay R.,
Rizvi Syed S. H.,
Harriott Peter
Publication year - 1993
Publication title -
biotechnology progress
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.572
H-Index - 129
eISSN - 1520-6033
pISSN - 8756-7938
DOI - 10.1021/bp00019a010
Subject(s) - anhydrous , raffinate , chemistry , supercritical carbon dioxide , carbon dioxide , chromatography , supercritical fluid , packed bed , extraction (chemistry) , solvent , analytical chemistry (journal) , stripping (fiber) , phase (matter) , materials science , organic chemistry , composite material
Abstract A continuous system was designed for the processing of anhydrous milk fat (AMF) with supercritical carbon dioxide (SC‐CO 2 ). The packed column was operated as a stripping column with SC‐CO 2 as the continuous phase and AMF as the dispersed phase. The extraction was studied at 24.1 MPa and 40 °C. To utilize the functional similarities and make the analysis simpler, the AMF triglycerides were grouped as low‐melting (LMT: C24–C34), medium‐melting (MMT: C36–C40), and high‐melting triglycerides (HMT: C42–C54). There was an increase in the concentrations of LMT and MMT and a decrease in that of HMT in the extract. The raffinate has a high concentration of HMT with trace amounts of LMT. The performance characteristics of the packed column were described by the number of transfer units (Nog), the overall volumetric mass transfer coefficient ( KOG a ), and the height of a transfer unit ( H OG ). The N OG and Kogci values decreased and the H OG value increased with increasing solvent‐to‐feed ratio. The H OG values increased and the N OG and K OG a values decreased from LMT to MMT to HMT, but the H OG values for HMT were greater than expected. The values of N OG , H OG , and KOG a for AMF (as a single component) were intermediate to those of MMT and HMT.