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. 2019 Sep 26;7(11):3570-3580.
doi: 10.1002/fsn3.1209. eCollection 2019 Nov.

Extraction of rapeseed cake oil using subcritical R134a/butane: Process optimization and quality evaluation

Tingting Guo  1   2   3 , Chuyun Wan  1   2   3 , Fenghong Huang  1   3
Affiliations

Extraction of rapeseed cake oil using subcritical R134a/butane: Process optimization and quality evaluation

Tingting Guo et al. Food Sci Nutr. .

Abstract

The optimal extraction conditions of rapeseed cake oil using subcritical R134a/butane were established by response surface methodology. The quality of subcritical R134a/butane extraction oil (SRBEO) was compared with supercritical CO2 extraction oil (SCO2EO) and hexane extraction oil (HXEO). The results showed the highest extraction yield obtained by subcritical R134a/butane in the condition of R134a-butane ratio of 1.5 kg/kg, at 45°C for 50 min. Compared with SCO2EO and HXEO, the extraction yield and β-carotene content of SRBEO (87.76%, 357.21 μg/100g) were the highest. The content of phospholipids and canolol in SRBEO (3.01 mg/g, 118.51 mg/100 g) was higher than SCO2EO (not detected, 95.82 mg/100 g) and less than HXEO (25.78 mg/g, 131.85 mg/100 g). The tocopherols in SRBEO were equivalent to SCO2EO but phytosterol content of SRBEO (560.19 mg/100 g) was less than SCO2EO (591.40 mg/100 g). For fatty acids, the three extraction oils had slight difference. Thus, subcritical R134a/butane extraction appeared to be feasible for rapeseed cake oil extraction.

Keywords: butane extraction; extraction oil quality; rapeseed cake; response surface methodology; subcritical R134a.

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Conflict of interest statement

The authors declared that we had no conflict of interest.

Figures

Figure 1
Figure 1
Effect of the ratio of R134a and butane on extraction yield
Figure 2
Figure 2
Response surface plots for the interaction of different factors. (a) R134a‐butane ratio and extraction time; (b) R134a‐butane ratio and extraction temperature; (c) extraction time and extraction temperature
See this image and copyright information in PMC

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