Method for extracting fatty acids from rice bran oil refined nigre

A technology for fatty acid and rice bran oil, which is applied in the direction of recovering fatty oil/fatty acid from waste, producing fat, recovering fatty substances, etc., can solve the problems of reducing economic value, destruction of oryzanol, etc., and achieves expansion of the scope of use, low production cost, and easy control. and the effect achieved

Active Publication Date: 2019-10-08
HUNAN HUACHENG BIOTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method adopts the traditional acid-adding and re-steaming technology, which requires the use of high-temperature vacuum distillation equipment,

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] (1) Alcohol extraction: Put 400kg of soapstock raw material refined from rice bran oil into 3m 3 In the extraction tank, turn on the steam, control the temperature at 45°C and heat to soften. After softening, add 2000L of edible ethanol with a volume concentration of 90% and stir to mix evenly. Then adjust the pH of the solution system to 10 with 5% sodium hydroxide aqueous solution. , heated and stirred at 55°C for 20 minutes, and filtered while hot by settling and centrifuging, discarding the centrifuged precipitate to obtain the extract;

[0039] (2) Solid-liquid separation: adjust the pH of the extract to 7.2 with hydrochloric acid aqueous solution with a mass concentration of 15%, and let it settle for 6 hours. After the precipitation is complete, filter with suction and collect the precipitate and filtrate separately. Fatty acid separation liquid;

[0040] (3) Membrane separation and purification: The fatty acid separation liquid is separated and refined through ...

Embodiment 2

[0046] (1) Alcohol extraction: Put 250kg of soapstock raw material refined from rice bran oil into 3m 3 In the extraction tank, turn on the steam, control the temperature at 50°C and heat to soften. After softening, add 1500L of methanol with a volume concentration of 92% and stir and mix evenly. Then use an aqueous sodium hydroxide solution with a mass concentration of 8% to adjust the pH of the solution system to 8.5. Heat and stir at 60°C for 30 minutes, then use tubular centrifugal filtration while hot, and discard the centrifuged precipitate to obtain the extract;

[0047] (2) Solid-liquid separation: adjust the pH of the extract to 6.7 with a sulfuric acid aqueous solution with a mass concentration of 10%, and let it settle for 8 hours. After the precipitation is complete, settle and centrifuge to collect the precipitate and filtrate separately. Fatty acid separation liquid;

[0048] (3) Membrane separation and purification: The fatty acid separation liquid is separated...

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PUM

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Abstract

The invention relates to a method for extracting fatty acids from rice bran oil refined nigre. The method includes the steps of (1) alcohol extraction, (2) solid-liquid separation, (3) membrane separation and refining, (4) decolorization, (5) concentration and (6) acid-water separation. Obtained finished products of the fatty acids are white solids which are pure natural fatty acids derived from rice bran; the purity of the obtained fatty acids can be as high as 98%, the impurity content is low, and the final yield of the fatty acids is higher than 70%; the method does not require high-temperature vacuum distillation equipment, and is suitable for plant extract factors, simple in production process, easy to operate and implement, low in production cost, and suitable for industrial production.

Description

technical field [0001] The invention relates to a method for extracting fatty acid, in particular to a method for extracting fatty acid by using rice bran oil refined soapstock as raw material. Background technique [0002] Rice bran oil fatty acid is a mixed fatty acid, mainly including tertiary stearic acid rich in palmitic acid with an iodine value below 8 and a freezing point above 52°C, and commercial oleic acid with a high iodine value and a freezing point below 8°C. [0003] Rice bran oil fatty acid is white or yellowish solid, used to manufacture various fatty acid salts, chemical additives, surfactants, high-grade soaps, emulsifiers, mineral dressing agents, release agents and polyurethane. [0004] So far, there has been no report on the extraction of fatty acids from rice bran oil refined soapstock using plant extraction and separation technology. [0005] At present, the manufacturers producing rice bran oil fatty acid are oil factories that refine rice bran oil...

Claims

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Application Information

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IPC IPC(8): C11B13/02
CPCC11B13/02Y02W30/74
Inventor黄华学刘庚贵刘永胜
OwnerHUNAN HUACHENG BIOTECH