Super critical extraction technology of rice oil

Abstract

The invention provides a super critical extraction technology of rice oil. The rice oil is obtained through the steps of CO2 super critical extraction and ultramicro filtration. Chemical reagents are not added in the production technology in particular the refining process of the rice oil, and the rice oil is refined by a pure physical method, so that the obtained rice oil reserves the active substances of peculiar flavonoid substances, oryzanol, vitamin E and the like of rice, and is free from solvent residues and pollution, high in safety and good in oil quality. As the chemical reagents are not added in the refining process, the rice oil does not have chemical residue reagents, so that the rice oil can be used as extremely good high-end edible oil and additives for cosmetics or medicines. The rice oil obtained through the super critical extraction technology disclosed by the invention has strong fragrance in smell and unique flavor, can be widely suitable for cooking various foods and dishes, has a higher nutrient value and health care effects, ensures high oxidation resistant active components, and is particularly suitable for being popularized in the technical field of the production of small-batch special-type fat.

Description

technical field

[0001] The invention relates to a method for supercritical extraction of rice oil, and belongs to the technical field: biology and new medical technology, modern agricultural technology, intensive processing of agricultural products and modern storage and transportation: value-added processing of agricultural and forestry products and special resources. Background technique

[0002] Rice oil, also known as rice germ oil, is a natural vegetable oil extracted from the husk and germ of rice. Its iodine value is low, and it is a non-drying oil. The refined rice oil is stable and not easy to be oxidized. Rice oil is rich in nutrients, oleic acid and linoleic acid account for 70-90%, and it also contains about 0.4% oryzanol, 1.2-1.8% γ-oryzanol, vitamin A, vitamin E and other trace elements. And, because my country is a big rice producing country, the rice output ranks first in the world, so rice oil has a wide source and abundant resources. There are three m...

Examples

Embodiment Construction

[0014] A kind of rice oil production process:

[0015] A, the rice kernels are air-dried, and the moisture content is controlled at 4%;

[0016] B. Put the dried rice kernels into a freezer at -25°C for 6 hours, then place them in a vacuum environment at -10°C for 7 hours, and finally place them in a vacuum environment at 45°C for 3 hours;

[0017] C, pulverize the rice kernels obtained after the treatment of B, and sieve with a 20 mesh sieve;

[0018] D. CO 2 Supercritical extraction, fluid extraction pressure is 40MPa, extraction temperature is 40°C, CO 2 Fluid flow is

[0019] 1000L / h, the extraction time is 70 minutes, and the rice kernel crude oil is obtained;

[0020] E, ultra-microfiltration removes lipoxygenase, selects the ultra-micro-filtration membrane of molecular weight cut-off 80-120kD, carries out ultra-micro-filtration process to the rice oil after filtering;

[0021] F. Ultraviolet irradiation, the filtered rice oil flows through the irradiation device ab...

technical field

[0001] The invention relates to a method for supercritical extraction of rice oil, and belongs to the technical field: biology and new medical technology, modern agricultural technology, intensive processing of agricultural products and modern storage and transportation: value-added processing of agricultural and forestry products and special resources. Background technique

[0002] Rice oil, also known as rice germ oil, is a natural vegetable oil extracted from the husk and germ of rice. Its iodine value is low, and it is a non-drying oil. The refined rice oil is stable and not easy to be oxidized. Rice oil is rich in nutrients, oleic acid and linoleic acid account for 70-90%, and it also contains about 0.4% oryzanol, 1.2-1.8% γ-oryzanol, vitamin A, vitamin E and other trace elements. And, because my country is a big rice producing country, the rice output ranks first in the world, so rice oil has a wide source and abundant resources. There are three m...

Examples

Embodiment Construction

[0014] A kind of rice oil production process:

[0015] A, the rice kernels are air-dried, and the moisture content is controlled at 4%;

[0016] B. Put the dried rice kernels into a freezer at -25°C for 6 hours, then place them in a vacuum environment at -10°C for 7 hours, and finally place them in a vacuum environment at 45°C for 3 hours;

[0017] C, pulverize the rice kernels obtained after the treatment of B, and sieve with a 20 mesh sieve;

[0018] D. CO 2 Supercritical extraction, fluid extraction pressure is 40MPa, extraction temperature is 40°C, CO 2 Fluid flow is

[0019] 1000L / h, the extraction time is 70 minutes, and the rice kernel crude oil is obtained;

[0020] E, ultra-microfiltration removes lipoxygenase, selects the ultra-micro-filtration membrane of molecular weight cut-off 80-120kD, carries out ultra-micro-filtration process to the rice oil after filtering;

[0021] F. Ultraviolet irradiation, the filtered rice oil flows through the irradiation device ab...