Method for extracting camellia oleosa seed oil by weak acid aqueous solution

A technology of camellia oil and camellia seeds, which is applied in the directions of oil/fat production, fat production, etc., can solve the problems that extraction technology cannot be applied on a large scale, organic solvents are flammable and explosive, and the oil yield of camellia oil is low. To achieve the effect of easy mass production, convenient comprehensive utilization and low production cost

Active Publication Date: 2013-10-16
CHANGSHA HAORUI BIOLOGICAL SCI & TECH
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Problems solved by technology

These patent documents have enriched the technical methods for extracting camellia oleifera seed oil, but at the same time there are shortcomings: although the physical low-temperature cold pressing technology has solved the damage to the quality of camellia oleifera seed oil by high-temperature pressing, the oil yield of camellia oleifera seed oil by low-temperature pressing method lower; supercritical CO 2 The extraction technology cannot be applied to industrial production on a large scale due to the limitation of its harsh operating conditions; although the water enzymatic method is a simple and efficient oil extraction technology, the selection of enzyme preparations, high cost and oil-water emulsification are limitations. The bottleneck of its industrial production application; there is a problem of solvent residue in the extraction of Camellia oleifera seed oil with organic solvent solutions such as alcohol aqueous solution, and at the same time, most organic solvents are flammable and explosive, and there are hidden dangers in production safety

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  • Method for extracting camellia oleosa seed oil by weak acid aqueous solution

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Weigh 200g of tea seed kernels and ultrafinely pulverize them to obtain a material with a particle size of 60-80μm, add phosphoric acid aqueous solution at a solid-to-liquid ratio of 1:6, and gelatinize at 92-95°C for 40min. After the gelatinized slurry was cooled to room temperature, the pH was adjusted to 4.5, and then stirred and leached for 2 hours at a temperature of 60°C. Take the extract and centrifuge it at 4500r / min for 10min, absorb the oil-water mixture in the upper layer, centrifuge the mixture again at 6500r / min for 10min, and pour out the supernatant oil. The detected oil extraction rate was 90.16%.

Embodiment 2

[0024] Weigh 200g of tea seed kernels and ultrafinely pulverize them to obtain a material with a particle size of 40-60μm, add phosphoric acid aqueous solution at a solid-to-liquid ratio of 1:8, and gelatinize at 92-95°C for 40min. After cooling the gelatinized slurry to room temperature, adjust its pH to 4, and then leaching with stirring for 1.5 h at a temperature of 60°C. The extract was centrifuged at 4000r / min for 12min, and the upper oil-water mixture was absorbed, and the mixture was centrifuged again at 8000r / min for 10min, and the supernatant clear oil was poured out. The detected oil extraction rate was 93.62%.

Embodiment 3

[0026] Weigh 300g of tea seed kernels and ultrafinely pulverize them to obtain a material with a particle size of 60-80μm, add phosphoric acid aqueous solution at a solid-to-liquid ratio of 1:4, and conduct gelatinization at 65-70°C for 60min. After the gelatinized slurry was cooled to room temperature, the pH was adjusted to 5, and then stirred and leached for 3 hours at a temperature of 60°C. The extract was centrifuged at 5000r / min for 20min, the upper oil-water mixture was absorbed, the mixture was centrifuged again at 7500r / min for 15min, and the supernatant oil was poured out. The detected oil extraction rate was 88.94%.

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Abstract

The invention relates to an edible oil production and processing technology, in particular to a method for extracting camellia oleosa seed oil by weak acid aqueous solution. The technical scheme adopted by the invention is that camellia oleosa seeds are taken as raw materials, and are added in the weak acid aqueous solution for slurry mixing after being subjected to superfine grinding, the constant temperature mixing and extracting are carried out on slurry after the slurry is gelatinized for a period of time, and the obtained extract liquid is subjected to two-step centrifugal separation to obtain the camellia oleosa seed oil. The camellia oleosa seed oil is clear, transparent, light yellow, and even golden yellow, does not contain benzo(a)pyrene, has no residual organic solvent, and can reach the national-level camellia oil edible safety standard without refining or after being subjected to simple refining. According to method, the production technology is simple, biological enzyme is not used during the production process, the processing temperature is low, the production cost of the camellia oleosa seed oil is lowered, so that the method is suitable for industrial large-scale production; meanwhile, the problems of low camellia oleosa seed oil yield, high energy consumption, existence of residual organic solvent, serious active nutritional ingredient loss and the like in a conventional production method are solved.

Description

technical field [0001] The invention relates to a production and processing technology of edible oil, in particular to a method for extracting camellia oleifera seed oil by using a weak acid aqueous solution. Background technique [0002] Camellia oleifera oil is extracted from the unique woody oil camellia seed in my country, also known as camellia oil or camellia oil. Camellia oleifera seed oil is called "Oriental olive oil" because of its natural active nutrients similar to "vegetable oil queen" olive oil. However, the current production process of Camellia oleifera seed oil is mostly high-temperature pressing, solvent leaching and chemical refining processes including steaming, pressing, desolventization and deodorization and other high-temperature processing processes. Among them, high-temperature pressing and high-temperature refining processes destroy the unique natural active nutrients of tea seed oil, and produce a strong carcinogen-benzo(a)pyrene; solvent leaching...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C11B1/10
Inventor 吴苏喜闫帅航谭传波黄闪闪宋斌李慧
Owner CHANGSHA HAORUI BIOLOGICAL SCI & TECH
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