A composite process for extracting tea seed oil by aqueous enzymatic method

Abstract

The invention discloses a compound technology for extracting tea seed oil employing an aqueous enzymatic method. The technology comprises the following steps: (1) decladding tea seeds, crushing, screening and frying for later use; (2) weighing the fried tea seed powder, sequentially adding part of distilled water and a mixed salt solution according to the solid-liquid weight / volume ratio of the tea seed powder to reaction liquid is 1 to (4.5-6), fully stirring, evenly mixing, and adjusting the pH or not; (3) heating the evenly mixed tea seed powder solution to 52-57 DEG C, adding a prepared enzyme fluid under a stirring condition, and stirring for 3-4 hours; and (4) centrifuging, standing and separating, so as to obtain a target product. According to the compound technology, combination innovation is achieved; the advantages of an extraction technology employing a modern aqueous enzymatic method in the world, and an extraction technology employing a traditional aqueous extraction process in China are integrated; high oil extraction rate can be increased by combined action of a degrading enzyme-salt effect; especially, the emulsion phenomenon caused by tea seed protein and the like can be relieved; and the yield of clear oil is significantly increased.

Description

technical field [0001] The invention belongs to the field of oil extraction and processing, and in particular relates to a composite process for extracting tea seed oil by an aqueous enzymatic method. Background technique [0002] As a big tea-producing country, my country has a planting area of ​​16 million mu of tea trees. It is conservatively estimated that the annual output of tea seeds is 4 million tons, and more than 500,000 tons of tea seed oil can be extracted, which is equivalent to the oil production of 470,000 hectares of rapeseed. The economic value is very considerable . Such rich tea seed resources have not been widely developed and utilized, which is particularly prominent in Fujian, a major tea-producing province. Most of the tea seeds are discarded in the fields to fend for themselves. The oil content of tea seed is about 30%. The composition of oil is similar to that of olive oil and has high nutritional value. Alkali and other ingredients have many health...

AI Technical Summary

Problems solved by technology

[0005] From the above technical solutions, it can be seen that the extraction of tea seed oil by aqueous enzymatic method requires organic solvent extraction in the last step, because the emulsification phenomenon of tea seed oil extracted by aqueous enzymatic method is extremely serious, and it is difficult to obtain clear oil

The inventor further studied each parameter condition of the aqueous enzymatic extraction process, and found that although the oil yield of tea seed oil had been improved to some extent through the selection of different parameter conditions in the prior art, the oil yield was not ideal enough, and the oil The emulsification phenomenon has not been solved, and the yield of clear oil is low; after extraction, organic solvent extraction (such as anhydrous ether) steps, crude oil refining steps, etc. are required. Organic solvent extraction is likely to cause solvent residues and affect the quality and safety of the product. In addition, alkali The refining process is complicated, time-consuming and labor-intensive, resulting in increased production costs

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