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Method for continuously esterifying free fatty acids in crude rice bran oil and removing water from products

A technology of free fatty acid and crude rice bran oil, applied in the direction of fatty acid esterification, fat oil/fat refining, fat production, etc., can solve the problems of easy inactivation, poor stability, expensive free enzymes, etc., and achieves improved enzymatic hydrolysis efficiency, Reduced production cost, effect of wide pH range

Inactive Publication Date: 2019-03-12
NORTHEAST AGRICULTURAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, free enzymes are sensitive to the environment, have poor stability to heat and pH, are easily inactivated, the reaction conditions are not easy to control, free enzymes are expensive and cannot be reused, etc., which limit the efficient use of enzymes.

Method used

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  • Method for continuously esterifying free fatty acids in crude rice bran oil and removing water from products

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Effect test

specific Embodiment approach 1

[0008] Specific implementation mode one: open the DC power supply of the magnetic fluidized bed, the hot water tank circulation system, add magnetase and phytosterol from the port on the magnetic fluidized bed, open the valve under the clean oil tank, adjust the system operating parameters, and make the magnetase in Fluidized state is reached in the magnetic fluidized bed. When the primary rice bran oil returns to the net oil tank, close the lower valve of the net oil tank, open the valves of the crude oil tank and the buffer tank, and adjust the pH value of the buffer in the buffer tank to 7.0, then the crude rice bran oil and buffer solution are transported to the first-stage liquid-solid two-phase magnetic fluidized bed reactor at a speed of 0.003m / s, and the external magnetic field strength is 0.024T, and the crude rice bran oil is heated to 60-95°C At this time, the addition amount of nano-magnetic immobilized lipase TIL in the first-level liquid-solid two-phase magnetic f...

specific Embodiment approach 2

[0009] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the crude rice bran oil is heated to 70-90° C., and other steps are the same as Embodiment 1.

specific Embodiment approach 3

[0010] Embodiment 3: The difference between this embodiment and Embodiment 1 is that the amount of nano-magnetic immobilized lipase TIL is 2%-4%, and other steps are the same as Embodiment 1.

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Abstract

The invention provides a method for continuously esterifying free fatty acids in crude rice bran oil and removing water from products. The method includes taking a nanometer magnetic immobilized lipase of TIL as an catalyst and phytosterol as an acryl receptor for an esterification reaction with the free fatty acids in the crude rice bran oil in a magnetic fluidized bed; adding molecular sieves into a packed bed to remove water from the products; conveying the reacted crude rice bran oil into a next magnetic fluidized bed and a next packed bed; after the crude rice bran oil passes through tenmagnetic fluidized beds and ten packed beds, returning the crude rice bran oil to the first magnetic fluidized bed and the first packed bed; and through a certain number of circulated reactions, continuously esterifying the free fatty acids in the crude rice bran oil and removing the water from the products. Research discovers that, when the intensity of an applied magnetic field is 0.024 T, the flow velocity of the crude rice bran oil is 0.003 m / s, the added quantity of the nanometer magnetic immobilized lipase of TIL is 3.0%, the added amount of the phytosterol is 18.0%, the added quantity of the molecular sieves is 10.0%, the esterification temperature is 80 DEG C, the content of FFA (free fatty acids) in the crude rice bran oil is reduced to 1.2% within 41 hours, the conversion rate ofthe phytosterol is 95.2%, and the content of VE (Vitamin E) remaining in the products is 84.0%.

Description

Technical field: [0001] The invention relates to the field of oil processing, in particular to a method for continuously esterifying free fatty acids in rice bran crude oil and removing moisture from products. Background technique: [0002] Rice bran is a by-product of rice processing. Rice bran contains 15%-23% oil and more nutrients such as tocopherols and phytosterols. Therefore, rice bran oil is superior to other edible oils in terms of functional properties. Rice bran oil contains a certain amount of FFA. If the acid value is too high, the quality of rice bran oil will be affected. Therefore, deacidification is required to obtain edible rice bran oil. At present, the deacidification methods mainly include chemical esterification deacidification and enzymatic esterification deacidification. Chemical esterification deacidification is difficult to recover glycerin, and the catalyst needs to be removed from the product; while enzymatic esterification deacidification uses li...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C11C3/04C11B3/00
CPCC11B3/001C11C3/04
Inventor 于殿宇王玉琦岳莹雪裴兴武陈书曼刘天一王立琦
Owner NORTHEAST AGRICULTURAL UNIVERSITY
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