Method for preparing tea saponin by using tea seed degreased dreg

A technology of tea saponin and camellia oleifera seed, which is applied in the field of tea saponin production from degreased camellia oleifera seed, can solve the problems of incomplete separation of impurities, complicated operation, long cycle, etc., and achieve the advantages of avoiding difficulty in concentration, simple process and convenient operation Effect

Inactive Publication Date: 2010-09-15
WUHAN POLYTECHNIC UNIVERSITY
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Problems solved by technology

The disadvantages of these methods are: incomplete separation of impurities, high energy consumption, complicated operation a

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  • Method for preparing tea saponin by using tea seed degreased dreg

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[0029] Further describe the present invention below in conjunction with accompanying drawing embodiment

[0030] Referring to the accompanying drawing, the degreased meal of Camellia oleifera seed enters the extractor for solvent extraction, and the solvent is 90% (v / v) aqueous methanol. The extraction temperature is 60°C, the solid-to-liquid ratio is 1:8, the number of extractions is 6 times, and each extraction time is about 20 minutes. The mixed solution obtained after extraction is evaporated and stripped to recover methanol to obtain crude tea saponin. The methanol-containing solids obtained after extraction are recovered to obtain desoaped pulp, which is feed.

[0031] The crude tea saponin heating water of preparation is adjusted to the aqueous solution containing tea saponin 40% (w / w), adds chitosan flocculant, and the concentration of chitosan is 1% (w / w), consumption is crude tea saponin 3% of the amount, precipitated for 2h after stirring, and filtered to remove s...

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Abstract

The invention discloses a method for preparing tea saponin by using tea seed degreased dregs, which comprises the following process steps of: firstly extracting by using high-concentration aqueous methanol, recovering methanol from an extraction liquid to prepare coarse tea saponin pasty liquid, and then purifying by adopting a three-purification method. Chitosan is used as a flocculating agent in the first purification to filter and remove partial impurities; a calcium hydroxide emulsion is used as a precipitating agent in the second purification, so that the tea saponin is converted into tea saponin calcium to be precipitated and separated from the water-soluble impurities, then the tea saponin calcium is converted into the tea saponin to be dissolved in water by using ammonium hydrogencarbonate, the impurities are further removed through filtration, then 30% hydrogen peroxide is used for decoloring, and the finished product of the tea saponin is prepared finally through spray drying. A solid obtained after separating and recovering the methanol from a methanol-contained solid obtained after extraction can be used as livestock feed. The invention has the advantages that the method has high obtainment ratio of the tea saponin, low energy consumption, simple process, convenient operation, high quality of the produced finished product of the tea saponin and wide application range.

Description

technical field [0001] The invention belongs to the technical field of vegetable oil and vegetable protein processing. It specifically relates to the in-depth development and utilization of camellia seed defatted meal, in particular a method for preparing tea saponin from camellia seed defatted meal. Background technique [0002] my country is the country with the highest output of Camellia oleifera, the largest cultivation area and the richest varieties in the world. The current output of camellia oleifera seeds is about 1.06 million tons, and the degreased tea seed meal after pressing and leaching for oil production is more than 550,000 tons. And in recent years, due to the state's attention and the adoption of a number of support policies, it will develop rapidly in 3 to 5 years, and the output is estimated to be about 10 times that of the current one. However, due to the toxic substance tea saponin contained in the defatted tea seed meal, it is difficult to use the came...

Claims

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Application Information

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IPC IPC(8): C07H15/256C07J63/00C07H1/08
Inventor 胡健华
Owner WUHAN POLYTECHNIC UNIVERSITY
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