Method for deacidifying rice bran oil by using enzymic method

A rice bran oil and deacidification technology, which is applied in the direction of fat oil/fat refining and fat production, can solve the problems of loss of nutrients, difficulty in refining rice bran oil, and increase of acid value of crude oil, so as to reduce process cost, facilitate industrial production, The effect of mild reaction conditions

Active Publication Date: 2016-07-27
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because rice bran contains a highly active lipase that can rapidly hydrolyze rice bran lipids, the acid value of crude oil increases rapidly, so the acid value of rice bran crude oil is very high, about 10-30mgKOH/g, and some are even higher. High, which brings great difficulties to the refining o

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0018] Example 1:

[0019] Mix 500g of rice bran oil with a phospholipid content of 8.0mg / kg, a wax content of 502mg / kg, and an acid value of 26.8mgKOH / g or more with glycerin. The amount of glycerin added to the rice bran oil is 33% of the FFA in the rice bran oil. %, add 3% of the total mass of the substrate Lipozyme435 lipase, react in a vacuum device for 6h, send the product to a nitrogen cooling device, the device temperature is 5℃, cool to 25℃, centrifuge the product at 2500rpm for 6min, take The oil phase was centrifuged at 3500 rpm for 8 minutes to obtain deacidified rice bran oil. The acid value of the rice bran oil was 1.96 mgKOH / g, and the oryzanol retention rate was 87.9%.

Example Embodiment

[0020] Example 2:

[0021] Mix 500g of rice bran oil with a phospholipid content of 4.8mg / kg, a wax content of 609mg / kg, and an acid value of 39.6mgKOH / g or more with glycerin. The added amount of glycerin is 33% of the FFA in the rice bran oil. %, add 3% of the total mass of the substrate Lipozyme435 lipase, react in a vacuum device for 6h, send the product to a nitrogen cooling device, the device temperature is 5℃, cool to 25℃, centrifuge the product at 2500rpm for 6min, take The oil phase was centrifuged at 3500 rpm for 8 minutes to obtain deacidified rice bran oil. The measured acid value of the rice bran oil was 3.03 mgKOH / g, and the oryzanol retention rate was 85.6%.

Example Embodiment

[0022] Example 3:

[0023] Mix 500g of rice bran oil with a phospholipid content of 3.9mg / kg, a wax content of 302mg / kg, and an acid value of 62.8mgKOH / g or more with glycerin. The added amount of glycerin is 33% of the FFA in the rice bran oil. %, add 3% of the total mass of the substrate Lipozyme435 lipase, react in a vacuum device for 6h, send the product to a nitrogen cooling device, the device temperature is 5℃, cool to 25℃, centrifuge the product at 2500rpm for 6min, take The oil phase was centrifuged at 3500 rpm for 8 minutes to obtain deacidified rice bran oil. The acid value of rice bran oil was 3.92 mgKOH / g, and the retention rate of oryzanol was 85.6%.

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Abstract

The invention discloses a method for deacidifying rice bran oil by using an enzymic method. The method comprises the following steps: mixing rice bran oil with glycerinum, adding lipase which accounts for 2-7% of the total mass of a substrate, enabling the component to react for 5-7 hours in a vacuum device, feeding a product into a nitrogen cooling device, cooling to 25-30 DEG C, and centrifuging so as to remove lipase, thereby obtaining the deacidifed rice bran oil. The method for deacidifying rice bran oil by using the enzymic method, which is disclosed by the invention, is low in rice bran oil acid value, high in nutrient element retention rate, efficient and rapid in reaction, and is a rice bran oil deacidification method which is green and applicable to industrial production.

Description

technical field [0001] The invention belongs to the technical field of synthesis of structural glycerides, in particular to a method for enzymatic deacidification of rice bran oil. Background technique [0002] Rice bran oil is a kind of vegetable oil made from rice bran, a by-product of rice processing. Its fatty acid composition ratio is suitable for human body absorption and rich in nutrients (oryzanol, vitamin E, sterol, etc.), and it is recognized as a nutritious and healthy oil in the world. Due to the lipolytic enzyme contained in rice bran, the fat in rice bran will be decomposed into fatty acids during rice processing and rice bran oil production, resulting in a higher content of free fatty acids (FFA) in processed crude rice bran oil, sometimes up to 40% . Both the traditional alkali refining deacidification and physical refining have certain limitations and are not suitable for the deacidification of rice bran oil with high acid value. At present, there are chem...

Claims

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Application Information

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IPC IPC(8): C11B3/00
CPCC11B3/003
Inventor 邹孝强金青哲王兴国黄健花刘睿杰常明王小三
Owner JIANGNAN UNIV
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