The invention discloses a method for extracting
capsaicin crystals from
oleoresin capsicum. The method comprises the following steps that chilli
powder is extracted with an aqueous alkaline solution in a single-stage continuous countercurrent ultrasonic extraction
machine, wherein the aqueous alkaline solution is prepared from
sodium chloride,
sodium acetate,
sodium hydroxide and beta-
cyclodextrin; filtrate obtained through filtering separation is processed through the steps of concentration,
ethanol extraction, reduced pressure
distillation,
petroleum ether low-temperature recystalization and the like, and then the high-purity needle-shaped
capsaicin crystals are obtained. According to the method, a continuous countercurrent and ultrasonic extraction technique, a micro-
cutting interaction technique and the like are combined on the basis of a common
solvent method, the extraction time is shortened, the
solvent using amount is decreased, the recycle rate and the purity of the
capsaicin crystals can be effectively increased, the whole operation process is easy and convenient, the requirements for the reaction condition and production equipment are low, and the method is a capsaicin
crystal extraction technology which is suitable for industrialized popularization.