Method for processing high-quality camellia oleifera seed oil free of benzo(a)pyrene residue

Abstract

A method for processing high-quality camellia oleifera seed oil free of benzo(a)pyrene residue comprises a step (1) of drying camellia oleifera seeds; a step (2) of unshelling the camellia oleifera seeds; a step (3) of performing CCD color sorting to remove mildewed camellia oleifera seeds; a step (4) of performing microwave baking of the camellia oleifera seeds; a step (5) of performing double helix low-temperature (below 65 DEG C) squeezing for make oil; a step (6) of performing washing, low-temperature treatment and oil residue separation; and a step (7) of using a compound decoloring agent to remove color and B(a)P simultaneously. By adopting the method to prepare the camellia oleifera seed oil, the oil yield is high, the storage stability is good, the obtained camellia oleifera seed oil has typical fragrance and flavor of conventional heating-crushing oil (the sense organ grading value is averagely 97.56), the damage to bioactive substances such as vitamin E and squalene and the like is reduced, the yield of the B(a)P in the oil extraction process is close to the plant oil limit standard of European Union, the average is only 2.4606 [mu]g/Kg, B(a)P cannot be detected from product oil (detected according to a GB/T22509-2008 method), and the eating safety is high.

Description

technical field [0001] The invention relates to a processing method of high-quality vegetable oil, in particular to a processing method of high-quality camellia oleifera seed oil without benzo(a)pyrene [B(a)P] residue. Background technique [0002] Camellia oleifera seed oil, also known as camellia oil, is obtained from the seeds of the Camellia oleifera tree of the family Theaceae. It is one of the four major vegetable oils in the world and is unique to China. The content of unsaturated fatty acids in Camellia oleifera seed oil is as high as 90%, of which oleic acid is 75%~83%, and linoleic acid is 7.4%~13%, which is very similar to olive oil, so it is called "Oriental olive oil". Camellia oleifera seed oil contains vitamin E, squalene, tea polyphenols and other functional ingredients, which have good effects on the prevention and treatment of cardiovascular diseases such as hypertension, coronary heart disease and atherosclerosis. Camellia oleifera seed oil, as a healthy ...

AI Technical Summary

Problems solved by technology

Camellia oleifera seed oil, as a healthy high-grade edible vegetable oil, is favored by high-end consumers and has promoted the rapid development of the camellia oil processing industry. However, due to insufficient processing technology and market quality supervision, safety problems have also followed. come

[0003] In September 2010, a well-known brand of camellia oleifera seed oil in my country was exposed because of a large excess of B(a)P. The more serious problem is that the problem of excessive B(a)P content of camellia oleifera seed oil in the market is not an isolated case. This has caused shocks in the industry, and consumers are full of deep worries about the safety of domestic vegetable oil products after being shocked

Cold-pressed Camellia oleifera seed oil means that after the Camellia oleifera seeds are dried or dried at low temperature, they are directly pressed by low-temperature (<60°C) physical pressing after physical shelling and impurity removal without the steaming and frying process in the conventional hot-pressing process. Camellia oleifera seed oil obtained by the method, its color depth, acid value, peroxide value, carbonyl value, etc. are significantly lower than hot-pressed oil, only need to be filtered, without the necessary refining of hot-pressed crude oil, and this method maximizes It reduces the production of B(a)P during the processing of Camellia oleifera seed oil, and effectively reduces the destruction of nutrients such as vitamin E, squalene, polyphenols, phytosterols, etc., but the disadvantage is that cold-pressed camellia oleifera seeds The oil flavor is relatively light, which is due to its flaws

Its disadvantages are that the leached crude oil contains more non-oil substances, dark color, poor quality, and contains a certain amount of residual solvent, which poses a safety hazard

More importantly, organic solvents have an enrichment effect on B(a)P and they also contain a small amount of B(a)P, which has aroused strong concerns among consumers about the safety of the extracted oil.

However, new camellia oleifera seed oil extraction technologies such as supercritical and subcritical fluid extraction methods have not yet reached the level suitable for industrial production.

[0005] It can be seen that the main production methods of camellia oleifera seed oil have their own advantages and disadvantages, and it is difficult to take into account the safety, nutrition and flavor of camellia oleifera seed oil

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