Recovery of sinapic acid from canola/rapeseed meal extracts by adsorption

A Structured Approach to Recover Valuable Compounds from Agri-food Side Streams

“…Polyphenol has been purified from the plant-based extract or fermentation broth by means of membrane separation, liquidliquid extraction (Silva et al, 2018b), preferential crystallization (Silva et al, 2018c), and adsorption (Moreno-González et al, 2020;Sevillano et al, 2014;Silva et al, 2018a;Soto et al, 2011) Silva et al (2018b evaluated the used of liquid-liquid extraction to purify polyphenols from fermentation broth. As one of the critical factors to design a liquid-liquid extraction process is solvent selection, the authors suggested the use of the NRTL-SAC (Nonrandom Two-Liquid Segment Activity Coefficient) thermodynamic model.…”

“…The permeate, from the small molecules' separation, contains the remained co-extracted components, polyphenols, sugars, phytic acids, and glucosinolates. Moreno-González et al (2020) suggested capturing the polyphenols compounds using a food grade macroporous resin (FPX66). The authors demonstrated that the other components, sugar, phytic acid, and glucosinolates poorly interact with the resin.…”

“…The authors demonstrated that the other components, sugar, phytic acid, and glucosinolates poorly interact with the resin. The obtained sinapic acid (mayor phenolic in rapeseed meal) fraction, recovered using ethanol/water mixture (Ferri et al, 2011;Moreno-González et al, 2020;Silva et al, 2018a), could be crystallized (Silva et al, 2018b), washed, and dried (Fig. 4b).…”

“…5a) could start with the acid extraction of the polyphenols and soluble carbohydrates, which was applied for apple pomace by Schieber et al (2003) and could be extended to other type of pomace such as carrot or tomato. The extract contains polyphenol components and soluble sugars which could be purified by adsorption using food grade hydrophobic polymeric resins such as XAD16 and FPX66 as soluble sugars might poorly interact with the hydrophobic matrixes (Ferri et al, 2011;Moreno-González et al, 2020;Schieber et al, 2003). After polyphenol elution, Schieber et al (2003) recommended to evaporate the solvent, which could be recovered by distillation and remove the remained water by freeze drying.…”

“…Solid-liquid separation between the extract and the insoluble fiber can be done by centrifugation of filtration. Purification of the plant-based extract can be done by isoelectric protein precipitation as recommended by Celiktas et al (2014), and polyphenols could be further purified by adsorption (hydrophobic polymeric resins) (Ferri et al, 2011;Moreno-González et al, 2020;Schieber et al, 2003;Silva et al, 2018a). The protein precipitate could be filtrated and dried while phenolics could be crystallized and dried.…”