Method and equipment for preparing tea seed oil from tea seeds and extracting tea polyphenol from byproduct tea seed cake

Abstract

The invention discloses a method and equipment for preparing tea seed oil from tea seeds and extracting tea polyphenol from a byproduct tea seed cake. The method comprises the following steps of: screening; drying; husking, crushing, separating and grinding the tea seeds to obtain tea seed powder; cooking tea seed powder; wrapping a cake; squeezing a tea cake into tea seed oil and the byproduct tea seed cake; and extracting tea polyphenol and saponin from the byproduct tea seed cake. The method is characterized in that: petroleum ether or No.6 solvent oil is used for soaking the tea seed cakeso as to obtain a tea seed oil product; and a degreased tea seed cake is extracted by using solution of methanol or ethanol, concentrated solution is extracted by using ethyl acetate, extract liquor is evaporated and the solvent is recycled so as to obtain a tea polyphenol product. A piece of special equipment comprises a drier, a husking machine, a cooking machine, a squeezer and a tea seed cakegrinder. Good separation of kernels from shells is achieved by a special husking machine and the cooking degree of the tea seed powder can be controlled well by a special cooking machine. A special tea seed cake grinder is used, so that grinding efficiency is higher and the service life of the equipment is prolonged.

Description

Technical field: [0001] The invention belongs to the field of methods and equipment for preparing tea seed oil, by-products and extracts thereof from camellia oleifera seeds, in particular to a method and equipment for preparing tea seed oil from camellia oleifera seeds, tea seed cake by-product and extraction of tea polyphenols from tea seed cake by-product methods, and the special equipment employed in these preparations. Background technique: [0002] Camellia oleifera is a unique woody edible oil tree species in my country, and it is also one of the four largest woody edible oil source tree species in the world. Tea seed oil is "the only edible oil comparable to olive oil and one of the healthiest in the world". Tea seeds contain 26% to 39% oil. According to rough statistics, the current national annual output of tea seeds is about 1.2 million tons, but the annual output of tea seed oil is only 150,000 to 180,000 tons. There are two major processes in the production an...

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Problems solved by technology

[0012] At present, the conventional extraction method of tea polyphenols and saponin is the water extraction method. The tea polyphenols and saponin obtained by this method have low purity, contain many water-soluble impurities, and are dark brown in color. A large amount of starch gelatinization and protein colloidization cause difficulty in solid-liquid separation, and the product is highly water-absorbent and sticky, requiring high drying temperature, which will often cause tea polyphenols and saponin to deteriorate and decompose, and the color will deepen. The effect of this method is bad

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