A process for the formation, isolation and purification of...

Details A process for the formation, isolation and purification of... A process for the formation, isolation and purification of...

C - Chemistry, Metallurgy

07

C

C07C 403/00 (2006.01) A23L 1/03 (2006.01) C07C 35/21 (2006.01)

Patent

CA 2239971

A process for forming, isolating and purifying xanthophyll crystals, preferably lutein from marigold flower petals, zeaxanthin from wolfberries or capsanthin and capsorubin from red pepper, is disclosed. A xanthophyll diester-containing plant extract is saponified in a composition of propylene glycol and aqueous alkali to form xanthophyll crystals. Crystallization is achieved without the use of added organic solvents. The crystals are isolated and purified. The substantially pure xanthophyll crystals so obtained are suitable for human consumption and can be used as a nutritional supplement and as an additive in food.

Procédé de formation, d'isolement et de purification de cristaux de xanthophylle, de préférence de lutéine des pétales de soucis, de zéaxanthine des symphorines du Nord-Ouest ou de capsantine et de capsorubène du poivre de Cayenne. On saponifie un extrait végétal contenant du diester de xanthophylle dans une composition de propylène-glycol et un alcali aqueux pour former des cristaux de xanthophylle. On procède à la cristallisation sans utiliser de solvants organiques ajoutés. On isole les cristaux et on les purifie. Les cristaux de xanthophylle sensiblement purs ainsi obtenus sont propres à la consommation par les humains et peuvent être utilisés comme supplément nutritionnel et additif alimentaire.

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