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Production method for linseed oil

A technology for linseed oil and production method, which is applied in the directions of fat oil/fat production, fat production, edible oil/fat, etc., can solve problems such as loss of linolenic acid components, and achieve the retention of nutrients, low solvent residues, and saving of the process of growing crystals. Effect

Active Publication Date: 2013-04-17
河北丝路晨光油脂有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although linseed oil contains a high amount of α-linolenic acid, the loss in the subsequent refining process can reach 3-4%, which has the disadvantage of a large loss of linolenic acid.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Embodiment 1: The specific process steps of the production method of this linseed oil are as follows.

[0023] (1) Pressing: 1000kg of linseed is pressed at 75°C, and the thickness of the cake after pressing is controlled to be 0.3mm;

[0024] (2) Extraction: Put the squeezed linseed cake into the extraction tank, vacuumize the extraction tank to -0.08MPa, pass through the n-butane subcritical fluid to 5cm higher than the material, the extraction temperature is 45°C, and the pressure is 0.55MPa , continuous extraction three times, each extraction time is 30 minutes; press the solvent in the extraction tank into the desolvation tank, vacuumize until the pressure of the desorption tank reaches -0.04MPa, and the desorption temperature is 30°C to obtain linseed crude oil; n-butane solvent After the subcritical fluid is vaporized, it is compressed and condensed by the compressor for recovery;

[0025] (3) Degumming and deacidification: Heat the linseed crude oil to 40°C, ad...

Embodiment 2

[0030] Embodiment 2: The specific process steps of the production method of this linseed oil are as follows.

[0031] (1) Pressing: 1000kg of linseed is pressed at 80°C, and the thickness of the cake after pressing is controlled to be 0.4mm;

[0032] (2) Extraction: put the squeezed linseed cake into the extraction tank, vacuumize the extraction tank to -0.08MPa, pass in subcritical fluid to 7cm above the material, extract at 48°C, and at a pressure of 0.6MPa for continuous extraction Three times, each extraction time is 35 minutes; press the solvent in the extraction tank into the desolventization tank, vacuumize until the pressure of the desorption tank reaches -0.04MPa, and the desorption temperature is 35°C to obtain linseed crude oil; after the subcritical fluid of the solvent is vaporized , and then pressurized and condensed by the compressor to recover;

[0033] (3) Degumming and deacidification: Heat the linseed crude oil to 40°C, add food-grade citric acid with a rat...

Embodiment 3

[0038] Embodiment 3: The specific process steps of the production method of this linseed oil are as follows.

[0039] (1) Pressing: 1000kg of linseed is pressed at 70°C, and the thickness of the cake after pressing is controlled to be 0.2mm;

[0040] (2) Extraction: put the squeezed linseed cake into the extraction tank, evacuate the extraction tank to -0.08MPa, feed the subcritical fluid to 3cm above the material, extract at 40°C and at a pressure of 0.4MPa, and continue the extraction Three times, the extraction time for each time is 50 minutes; press the solvent in the extraction tank into the desolventization tank, vacuumize until the pressure of the desorption tank reaches -0.06MPa, and the desorption temperature is 45°C to obtain linseed crude oil;

[0041] (3) Degumming and deacidification: Heat the linseed crude oil to 40°C, add food-grade citric acid with a ratio of 0.05% of the oil weight, and quickly stir for degumming; add 25Be' sodium hydroxide solution according ...

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Abstract

The invention discloses a production method for linseed oil. The production method comprises the processing steps as follows: (1) extracting, namely extracting crude linseed oil from a linseed cake subjected to squeezing and oil extraction by using a subcritical fluid; (2) degumming and deacidifying, namely degumming the crude linseed oil at the temperature of 40 DEG C by using citric acid, deacidifying by using sodium hydroxide, and separating to obtain alkali refining oil; (3) washing, namely heating the alkali refining oil to be 80-85 DEG C, and adding hot water of 90-95 DEG C for washing; (4) decolorizing and dewaxing, namely heating the washed oil to be 90 DEG C in a vacuum state under a negative pressure of 0.06-0.07 MPa, adding activated clay and active carbon, stirring for decolorizing, gradually cooling the oil in the stirring process for winterization, and filtering; and (5) deodorizing, namely deodorizing the winterized oil under the condition that the temperature is 150-155 DEG C and the vacuum degree is less than 200 Pa, and obtaining the linseed oil. The production method has the characteristics of simple process, convenience for operation, high extraction efficiency, low solvent residue content and low loss of product nutrient content.

Description

technical field [0001] The invention relates to a method for preparing vegetable oil, in particular to a method for producing linseed oil. Background technique [0002] Flaxseed oil is a kind of edible vegetable oil that uses plant seeds as raw materials, extracts and processes a series of edible vegetable oils that have health effects on the human body. Flaxseed oil contains special nutrients, especially containing more than 50% of α-linolenic acid. Since α-linolenic acid is necessary for the human body and cannot be synthesized by itself, it is very popular. Flaxseed oil is not only edible, but also used in many fields such as medicine and health care products. [0003] From the currently published linseed oil method there is supercritical CO 2 Extraction, organic solvent n-hexane extraction, pressing extraction. Supercritical CO 2 The extraction operation pressure is high, the equipment requirements are high, the cost is high, and it is difficult to form a large-scale...

Claims

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Application Information

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IPC IPC(8): C11B1/10C11B3/00A23D9/02
Inventor 田章起杨俊旺崔志山李晓辉
Owner 河北丝路晨光油脂有限公司
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