Transferring of red Monascus pigments from nonionic surfactant to hydrophobic ionic liquid by novel microemulsion extraction

Extraction of natural red colorants from the fermented broth ofPenicillium purpurogenumusing aqueous two-phase polymer systems

“…Comparing our results with the other reports in the literature, we found that Sheng et al studied the extractive fermentation of intracellular Monascus pigments in a nonionic surfactant micelle aqueous solution. The process involved transferring hydrophobic Monascus pigments from a nonionic surfactant to an ionic liquid using a novel hydrophobic ionic liquid–nonionic surfactant–water Winsor microemulsion extraction.…”

Effects of nonionic surfactants on pigment excretion and cell morphology in extractive fermentation of Monascus sp. NJ1

“…b), indicating that most of the pigments in the fermentation system that were extracted were extracellular. The results showed that Brij 35 was superior to the other series of nonionic surfactants, including Triton X and Tween, regarding their extraction effects, which has previously been reported …”

“…Researchers have found that by adding nonionic surfactants, extractive fermentation can promote the secretion of the products, which alleviates the intracellular feedback inhibition and thereby improves the yield . Hence the key to this extractive fermentation approach is to identify suitable extractants that meet the biocompatibility requirements and have strong extractive ability …”

Preparation and characterization of yellow Monascus pigments

“…In our previous work, this novel ionic liquid based Winsor I microemulsion extraction was developed for recovery of ionizable red Monascus pigments from nonionic surfactant aqueous solution, in which red Monascus pigments were transferred from nonionic surfactant aqueous solution to ionic liquid phase by this IL based Winsor I microemulsion extraction and the ionizable red Monascus pigments in the IL phase were back-extracted by IL-water two-phase system via adjustment of pH [17]. In the present work, nonionizable Monascus pigments (yellow ones and orange ones as shown in Fig.…”

“…Transferring of Monascus pigments from nonionic surfactant aqueous solution to ionic liquid (IL) was conducted by ionic liquid based Winsor I microemulsion extraction [17]. The clear supernatant fermentation broth (20 ml) was mixed with 5 g (4 ml) IL (ionic liquid, [Bmim]PF 6 ) in 50 ml tube, which was subjected to Winsor I microemulsion extraction by setting up at a room temperature for phase separation for at least 1 h. The mixture was separated into two phases, where the lower one was excess IL phase and the upper one was W m (oil-in-water microemulsion) phase (Winsor I microemulsion).…”