Method for refining pressing flaxseed oil through solid adsorption and vacuum filtration

A technology of linseed oil and vacuum oil filtration, which is applied in the direction of fat oil/fat refining and fat production, which can solve the problems of unpleasant fragrance of linseed oil, damage to the internal quality of oil products, loss of linseed oil, etc., and reduce food safety Risk, improve quality grade, effect of removing bitterness

Active Publication Date: 2011-02-23
INST OF OIL CROPS RES CHINESE ACAD OF AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] For some large-scale processing enterprises, because their oil products are listed on the market, they must be refined due to the mandatory technical constraints of national standards and norms. Most of the refining processes are "four degumming" refining processes, that is, hydration degumming , Alkali refining deacidification, adsorption decolorization, high temperature (220 ~ 240 ℃) vacuum deodorization, through this refining process, although the technical requirements are met, it will bring some other problems, such as the loss of the inherent aroma of linseed oil in the finished linseed oil Fragrance and unpleasant fishy smell, this kind of fishy smell is still unacce...

Method used

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  • Method for refining pressing flaxseed oil through solid adsorption and vacuum filtration
  • Method for refining pressing flaxseed oil through solid adsorption and vacuum filtration
  • Method for refining pressing flaxseed oil through solid adsorption and vacuum filtration

Examples

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Embodiment 1

[0023] A method for solid adsorption and vacuum oil filtration refining pressed linseed oil, which comprises the following steps:

[0024] 1) Adsorption: Take the cold-pressed linseed oil squeezed out at room temperature at 35°C. The smell presents a nutty fragrance and no taste; the solid impurities are separated by centrifugation, the oil is cool and transparent, and the acid value is 1.3mgKOH / g oil. The peroxide value is 5.2mmol / kg, the color measured in a 2.54cm tank is Y19, R1.4, and the heat test at 280°C shows that the oil color becomes dark black with visible precipitates;

[0025] Take 100 parts by weight of the above-mentioned cold-pressed linseed oil and 2 parts by weight of diatomite adsorbent calcined by flux, and stir at a constant temperature of 45 ° C for 30 minutes (stirring contact);

[0026] The diatomite adsorbent calcined by flux is calcined by flux and diatomite according to the conventional calcination process, and the weight ratio of flux to diatomite i...

Embodiment 2

[0036] A method for solid adsorption and vacuum oil filtration refining pressed linseed oil, which comprises the following steps:

[0037] 1) Adsorption: The flaxseed roasted at 120°C is pressed by an oil press to produce oil. The hot-pressed flaxseed oil has a strong fragrance and no taste; the solid impurities are separated by centrifugation, and the oil is black. The acid value is 1.6mgKOH / g oil, the peroxide value is 6.0mmol / kg, the color measured by the 2.54cm tank is Y30, R1.9, and the heat test at 280°C, the color of the oil turns dark black with visible precipitates;

[0038] Take 100 parts by weight of the above-mentioned hot-pressed linseed oil and 2.5 parts by weight of diatomite adsorbent calcined by flux, and stir at a constant temperature of 45° C. for 30 minutes (stirring contact).

[0039] The diatomite adsorbent calcined by flux is calcined by flux and diatomite according to the conventional calcination process, and the weight ratio of flux to diatomite is 5:1...

Embodiment 3

[0049] A method for solid adsorption and vacuum oil filtration refining pressed linseed oil, which comprises the following steps:

[0050] 1) Adsorption: 100 parts by weight of pressed linseed oil (cold-pressed linseed oil, the same as in Example 1) was contacted with 0.5 parts by weight of diatomite adsorbent calcined with flux at 30° C. for 30 minutes;

[0051] The described diatomite adsorbent calcined by flux is calcined by flux and diatomite according to the conventional calcination process (i.e. diatomite production), and the weight ratio of flux to diatomite is 8: 100; wherein , the flux is potassium hydroxide.

[0052] 2) Winterization: Cool to 5°C and freeze for 4 hours, then filter to remove solids;

[0053] 3) Vacuum oil filtration: At a temperature of 50°C, the linseed oil from which solids have been removed is passed through a vacuum oil filter filled with activated alumina / silicon oxide (an existing complete set of equipment) for vacuum oil filtration to obtain ...

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Abstract

The invention relates to a method for refining edible flaxseed oil. The method for refining pressing flaxseed oil through solid adsorption and vacuum filtration is characterized by comprising the following steps of: 1) adsorption: contacting 100 weight parts of pressing flaxseed oil with 0.5 to 10 weight parts of kieselguhr adsorbent calcined by a flux at the temperature of between 30 and 50 DEG C for 30 minutes or more; 2) winterization: cooling to the temperature of between 5 and 10 DEG C, freezing for not less than 3 hours, and filtering to remove solids; 3) vacuum filtration: at the temperature of between 50 and 55 DEG C, performing vacuum filtration on the flaxseed oil of which the solids are removed in an active alumina/silicon oxide filled vacuum filtering machine to obtain the refined clean flaxseed oil; and 4) storage under the protection of inert gas: filling the inert gas into the refined clean flaxseed oil for protective storage. By the method, harmful substances can be removed from the flaxseed oil, the quality grade of the flaxseed oil is improved, and the flavor of the oil cannot be influenced. The method has a simple and effective process and is convenient to implement and apply industrially.

Description

technical field [0001] The invention relates to a refining method of edible linseed oil, which belongs to the technical field of edible oil processing. Background technique [0002] For a long time, the production and consumption of edible linseed oil (commonly known as: flax oil) has been mainly limited to the main flax producing areas. Due to its low degree of commercialization, most of them are processed on a small scale. Pressed oil (pressed linseed oil) is used as a finished edible oil through simple refining such as filtration and sedimentation or even without refining, and few quality inspections due to insufficient conditions. Cold-pressed linseed oil has a fragrance similar to nuts, while hot-pressed linseed oil after hot-frying has a strong aroma of linseed oil. However, once sampling inspections are carried out, there are often problems such as unqualified physical, chemical and hygienic indicators. , especially in the process of processing, some foreign matter o...

Claims

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Application Information

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IPC IPC(8): C11B3/00C11B3/10
Inventor 黄庆德杨金娥邓乾春郑畅杨湄李文林刘昌盛万楚筠郭萍梅钮琰星
Owner INST OF OIL CROPS RES CHINESE ACAD OF AGRI SCI
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