Low-temperature refining method for pressed rapeseed oil

A low-temperature refining and rapeseed oil technology, which is applied in the direction of fat oil/fat refining and fat production, can solve the problems of loss of inherent aroma substances of rapeseed oil, complicated process, easy damage, etc., and achieves improved refining rate, simple process and avoidance of the effect of destruction

Inactive Publication Date: 2015-05-13
金太阳粮油股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The refining process of four-stage pressed rapeseed oil is to refine the pre-pressed crude oil. The traditional refining process uses hydration degumming (dephosphorization), alkali refining deacidification, and high-temperature dehydration technology, that is, a certain amount of water Or dilute acid, dilute alkali and other electrolyte solutions are added to hot oil under stirring to remove peptized impurities, free fatty acids, excess water and other impurities in the oil. This process is currently the mainstream method of oil refining and processing at home and abroad; but this Water and caustic soda are used in the process, which are in close contact with oil. In the process of dephosphorization, deacidification and subsequent high-temperature dehydration, it is easy to destroy or lose the inherent aroma and certain nutrients of rapeseed oil. The process is complicated and energy consumption is high. , large loss

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Weigh 1000kg of pressed rapeseed crude oil, and the acid value is 0.8 (KOH) / (mg / g). The crude oil is first filtered through a 45-mesh blade filter to reduce the residue content to 0.5%-1% (mass percentage ); then add 2.0kg of soft water to the crude oil while stirring, and keep stirring at 40r / min for 1 hour to fully dissolve the phospholipids in the crude oil into the water, then add 1.5kg of rapeseed cake particles with a particle diameter of 2 to 5mm, and stir while stirring. Add, the stirring speed is 30r / min, after the stirring starts, open the cooling water valve, keep the crude oil temperature at 28°C, stir for 50min, the rapeseed cake particles can fully absorb the moisture in the rapeseed crude oil, and finally the rapeseed The oil and rapeseed cake particles are sent to the plate and frame filter for filtration to realize the separation of rapeseed oil from rapeseed cake particles, phospholipids and other impurities, and obtain clear, transparent and fragrant r...

Embodiment 2

[0023] Weigh 1000kg of pressed rapeseed oil, the acid value is 1.4 (KOH) / (mg / g), the crude oil is first filtered through a 45-mesh leaf filter, and the residue content is reduced to 0.5%-1% (mass percentage) Then add 2.0kg semi-saturated soda ash aqueous solution while stirring the crude oil, keep stirring at 30r / min for 1h, so that the phospholipids in the crude oil are fully dissolved in water, the free fatty acid part in the rapeseed oil is neutralized with soda ash, and the crude oil acid is detected by sampling The price is 0.8 (KOH) / (mg / g), then add 2.0kg of rapeseed cake particles with a particle diameter of about 2-5mm, add while stirring, the stirring speed is 30r / min, after the stirring starts, open the cooling water valve , keep the crude oil temperature at 28°C, stir for 55 minutes, the rapeseed cake particles can fully absorb the moisture in the rapeseed crude oil, and finally send the rapeseed oil and rapeseed cake particles to the plate and frame filter for filtr...

example 3

[0025] Weigh 1000kg of pressed rapeseed oil, and the acid value is 2.4 (KOH) / (mg / g). The crude oil is first filtered through a 45-mesh leaf filter to reduce the slag content to 0.5%-1% (mass percentage) Then add 2.5kg semi-saturated soda ash aqueous solution while stirring the crude oil, keep stirring at 50r / min for 1h, so that the phospholipids in the crude oil are fully dissolved in water, the free fatty acid part in the rapeseed oil is neutralized with soda ash, and the crude oil acid is detected by sampling The price is 1.4 (KOH) / (mg / g), add 2.0kg semi-saturated soda ash aqueous solution while stirring, keep stirring at 30r / min for 1h, neutralize the free fatty acid in rapeseed oil with soda ash, and take a sample to detect the acid value of crude oil 0.8 (KOH) / (mg / g), then add 1.8kg of rapeseed cake particles with a particle diameter of about 2-5mm, add while stirring, the stirring speed is 30r / min, after the stirring starts, open the cooling water valve , keep the crude ...

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Abstract

The invention discloses a low-temperature refining method for pressed rapeseed oil. The method sequentially comprises the steps of performing pre-filtration and deacidification, dephosphorizing, filtering and the like. The method is simple in process, low in energy consumption and low in loss, and fully retains inherent aromas and nutritive substances of the rapeseed oil.

Description

technical field [0001] The invention relates to a method for refining pressed rapeseed oil. Background technique [0002] The refining process of four-stage pressed rapeseed oil is to refine the pre-pressed crude oil. The traditional refining process uses hydration degumming (dephosphorization), alkali refining deacidification, and high-temperature dehydration technology, that is, a certain amount of water Or dilute acid, dilute alkali and other electrolyte solutions are added to hot oil under stirring to remove peptized impurities, free fatty acids, excess water and other impurities in the oil. This process is currently the mainstream method of oil refining and processing at home and abroad; but this Water and caustic soda are used in the process, which are in close contact with oil. In the process of dephosphorization, deacidification and subsequent high-temperature dehydration, it is easy to destroy or lose the inherent aroma and certain nutrients of rapeseed oil. The pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C11B3/00C11B3/06C11B3/16
CPCC11B3/001C11B3/008C11B3/06
Inventor 王志荣刘尧刚
Owner 金太阳粮油股份有限公司
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