Extraction of carotenoid-rich palm pressed fiber oil using mixtures of hydrocarbons and short chain alcohols

Author(s)

Alvarenga, Gabriela Lara ^[1] ; Cuevas, Maite Sarria ^[1] ; Capellini, Maria Carolina ^[1] ; Crevellin, Eduardo Jose ^[2] ; Beraldo de Moraes, Luiz Alberto ^[2] ; da Costa Rodrigues, Christianne Elisabete ^[1]

Affiliation

^[1] Univ Sao Paulo, FZEA, Dept Engn Alimentos ZEA, LES, BR-13635900 Pirassununga, SP - Brazil

^[2] Univ Sao Paulo, Dept Quim, BR-14040901 Ribeirao Preto, SP - Brazil

• Document type: Journal article
• Source: Food Research International; v. 128, FEB 2020.
• Web of Science Citations: 0

Abstract

Solvent extraction is the most efficient method for recovering residual oil from palm pressed fiber (PPFO), which may contain up to eight times the carotcnoid content of that found in crude palm oil. The objective of the present study is the use of binary mixtures of hydrocarbons (HC), hexane (Hex), cyclohexane (CHex) or heptane (Hap), and alcohols (ALC), ethanol (Eth) or isopropanol (IPA), in order to promote the highest recovery of a carotenoidrich PPFO, in which the compositions of the mixtures are defined based on the calculation of solute-solvent distance (Ra) considering beta-carotene as the solute. The extraction experiments were conducted in batch, at 60 +/- 2 degrees C, or in a fixed-bed packed column, at 55 +/- 3 degrees C. Hex and Hep:IPA provided 80% of batch PPFO extraction yield, while in column, the highest yields were obtained with Eth and Hex:IPA (66%). The total carotenoid content obtained was the same independent of the solvent and extraction configuration (from 1790 +/- 230 up to 2539 +/- 78 mg beta-carotene/kg PPFO). In terms of the carotenoid profile, beta-carotene was mostly extracted by Hex, Hex:Eth stood out in the extraction of alpha-carotene, and Eth extracted the highest content of lycopene. It is possible to infer that mixtures of HC and ALC with compositions defined based on Hansen Solubility Parameters (HSPs) demonstrated good ability to extract carotenoid-rich PPFO, maintaining their relatively stable fatty acids composition and free acidity, showing that partial substitution of HC by ALC is technically possible. (AU)

• FAPESP's process: 14/21252-0 - Equilibrium and production processes of biofuels and bioproducts
• Grantee: Antonio José de Almeida Meirelles
• Support type: Research Projects - Thematic Grants
• FAPESP's process: 18/12713-5 - Effects of soybean pre-treatment on the performance of the alcoholic extraction process: yield, functionalities of the protein fraction and volatile fraction characterization
• Grantee: Maria Carolina Capellini
• Support type: Scholarships in Brazil - Post-Doctorate
• FAPESP's process: 17/20840-4 - Valorization of agroindustrial coproducts through obtaining vegetable oils and minority compounds by extraction with solvents
• Grantee: Christianne Elisabete da Costa Rodrigues
• Support type: Regular Research Grants