Extraction of alkaloids from opium

Details Extraction of alkaloids from opium Extraction of alkaloids from opium

C - Chemistry, Metallurgy

07

D

C07D 489/02 (2006.01) B01D 11/04 (2006.01) C07D 217/20 (2006.01) C07D 221/00 (2006.01) C07D 317/00 (2006.01) C07D 491/04 (2006.01)

Patent

CA 2569758

A method for extracting at least one alkaloid from opium that includes dissolving opium in a solvent, heating the dissolved opium solution, cooling the dissolved opium solution, adjusting the pH of the dissolved opium solution with at least one first weak acid, filtering the dissolved opium solution to recover a filtrate; and then separating and purifying at least one alkaloid in the filtrate. Preferably, this includes an additional step of chilling the opium solution after adjusting the pH of the dissolved opium solution with at least one first acid. The preferred method for separating and purifying at least one alkaloid in the filtrate includes utilizing preparative liquid chromatography, however, solvent extraction and filtration can also be utilized.

Une méthode pour extraire au moins un alcaloïde de l~opium, ce qui inclut la dissolution de l~opium dans un solvant, le chauffage de la solution d~opium dissout, le refroidissement de la solution d~opium dissout, l~ajustement du pH de la solution d~opium dissout à au moins un premier acide faible, puis le filtrage de la solution d~opium dissout afin de récupérer un filtrat. Ensuite au moins un alcaloïde est obtenu par la séparation et la purification dans le filtrat. De préférence, ceci inclut une étape supplémentaire par refroidissement de la solution d~opium après le règlement du pH de la solution d~opium dissout avec au moins un premier acide. La méthode préférée pour séparer et purifier au moins un alcaloïde du filtrat comprend l~utilisation d~une chromatographie liquide préparative, cependant on peut aussi utiliser un solvant d~extraction et de filtration.

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