Method for ultrasonic countercurrent extraction of tea seed and/or camellia seed soil

Abstract

The invention discloses a method for ultrasonic countercurrent extraction of tea seed and / or camellia seed soil, and the method comprises the following steps: putting the raw material treated tea seed and / or camellia seed oil into a feed device of a continuous countercurrent ultrasonic leacher, and inputting an extraction agent into the leacher from a slag outlet at the other end, and inputting the material and extraction liquid at the same time, wherein the ultrasonic frequency is 20-25KHz, the ultrasonic intensity is 50-600W, the extraction temperature is 30-60 DEG C, the material-liquid mass ratio is (1:2)-(1:12), and the leaching time is 10-30 minutes; separating to obtain tea seed and / or camellia seed residue and extract liquid; obtaining the tea seed and / or camellia seed raffinate from the slag outlet, and conveying to a solvent recycling system to recycle the extraction agent; obtaining the extraction liquid from a liquid outlet of the continuous countercurrent ultrasonic leacher; separating the tea seed and / or camellia seed crude oil from the extraction liquid while recycling the extraction agent. By adopting the continuous countercurrent ultrasonic technology to extract the tea seed and / or camellia seed crude oil, the method disclosed by the invention has the advantages of simple equipment, low energy consumption, high oil yield, short extraction time, low solvent consumption and the like, and is suitable for large-scale production.

Description

technical field [0001] The invention belongs to the technical field of vegetable oil extraction, and in particular relates to a method for ultrasonic countercurrent extraction of tea seed and / or camellia oleifera seed oil. Background technique [0002] my country is the hometown of tea, and there are many varieties of tea. Tea seeds and / or camellia oleifera seeds are the fruits of tea trees, which are by-products of tea production. Tea seeds and / or Camellia oleifera seeds can be used to extract oil, which was recorded as early as in the "Compendium of Materia Medica" written by Li Shizhen (1518-1593), a medical scientist in the Ming Dynasty. In December 2009, "Ministry of Health of the People's Republic of China Announcement No. 18 in 2009" officially approved tea seed and / or Camellia oleifera seed oil as new resource food. In 2011, there were more than 31.65 million mu of tea gardens in my country, and the output was 450kg / hm 2 According to calculations, the potential res...

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Problems solved by technology

The tea seed and / or camellia seed crude oil obtained by pressing method has deep color, high acid value, solid impurities such as saponin, bitter taste, long pressing time, high residual oil rate, and high temperature of green body during the oil pressing process. The steaming and frying process is easy to generate strong carcinogen benzopyrene; although the cold pressing method avoids the heat treatment process in the traditional pressing method, the residual oil rate of the cake residue is high, and the unique aroma and flavor of tea seed and / or camellia oil are relatively weak ; The organic solvent extraction method has long extraction time, large solvent consumption, low efficiency, and poor quality of crude oil; the supercritical extraction method requires high equipment, high cost, and high energy consumption, and is not suitable for large-scale industrial continuous production

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