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Method for extracting oryzanol from rice oil

An extraction method and technology for oryzanol, applied in the directions of steroids, organic chemistry, etc., can solve the problems of complicated operation, low oryzanol yield, difficult separation of solvents, etc., and achieve the effects of reducing hydrolysis and reducing alkalinity.

Inactive Publication Date: 2017-05-31
SHANDONG SANXING CORN IND SCI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Common oryzanol extraction methods are acidification distillation, non-polar solvent separation, fatty acid distillation and concentration, etc. Some of these methods are complicated to operate, some solvents are not easy to separate, difficult to recover, and some oryzanol yields are too low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A method for extracting oryzanol in rice oil, the steps are as follows:

[0033] Get 100L of rice crude oil tested, the acid value is 6mg(KOH) / g, and the oryzanol content is 2.3%.

[0034] (1) First, add phosphoric acid with a volume concentration of 70% to rice crude oil (the amount of phosphoric acid added is 1.0‰ of the oil weight) for degumming, the degumming temperature is 75°C, and the degumming time is 30min, then add light alkaline water (sodium hydroxide Quality is 0.084kg) to carry out neutralization, then add the water (the amount of water is calculated by 6% of oil weight) of the same temperature to wash, get degummed oil;

[0035] (2) Add sodium hydroxide (calculated according to the acid value of rice crude oil, 1.1 times the theoretical amount of alkali added, 0.471kg) to the degummed oil to carry out alkali refining to obtain soapstock; the alkali refining temperature is 50°C, and the alkali refining time 25min;

[0036] (3) adding sodium hydroxide in ...

Embodiment 2

[0041] A method for extracting oryzanol in rice oil, the steps are as follows:

[0042] Get 100L of rice crude oil tested, acid value is 4mg(KOH) / g, oryzanol content is 1.9%.

[0043] (1) First, adding phosphoric acid with a volume concentration of 75% to rice crude oil (the amount of phosphoric acid added is 1.05‰ of the oil weight) for degumming, the degumming temperature is 80°C, and the degumming time is 40min, then add light alkaline water ( Sodium quality is 0.096kg) to carry out neutralization, then add the water (the amount of water is calculated by 8% of oil weight) of equal temperature to carry out neutralization, get degummed oil;

[0044] (2) Add sodium hydroxide (calculated according to the acid value of rice crude oil, 1.3 times the theoretical amount of alkali added, which is 0.370kg) to the degummed oil to carry out alkali refining to obtain soapstock; the alkali refining temperature is 60°C, and the alkali refining time 30min;

[0045] (3) add sodium hydroxi...

Embodiment 3

[0050] A method for extracting oryzanol in rice oil, the steps are as follows:

[0051] Get 100L of rice crude oil tested, acid value is 7mg(KOH) / g, oryzanol content is 2.5%.

[0052] (1) First, adding phosphoric acid with a volume concentration of 80% (the amount of phosphoric acid added is 1.1‰ of the oil weight) to the rice crude oil for degumming, the degumming temperature is 85°C, and the degumming time is 50min, then add light alkaline water ( Sodium quality is 0.107kg) to carry out neutralization, then add the water (the amount of water is calculated by 10% of oil weight) of equal temperature to carry out neutralization, obtain degummed oil;

[0053] (2) Add sodium hydroxide (calculated according to the acid value of rice crude oil, 1.25 times of the theoretical amount of alkali added, which is 0.650kg) to the degummed oil to carry out alkali refining to obtain soapstock; the alkali refining temperature is 70°C, and the alkali refining time 35min;

[0054] (3) add sod...

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Abstract

The invention relates to an oryzanol extraction process, in particular to a method for extracting oryzanol from rice oil. The method for extracting oryzanol from rice oil comprises the following steps: firstly, degumming rice crude oil to obtain degummed oil; performing alkali refining on the degummed oil to obtain soap stock; performing supplement saponification on the soap stock, adding methanol, water and sodium carbonate for alkali dissolution to obtain supernatant liquid; adding hydrochloric acid and citric acid into the supernatant liquid in sequence for adjusting pH to obtain an oryzanol crude product; cleaning and drying to obtain refined oryzanol. By adopting the oryzanol extraction method, the sodium carbonate is used for dissolving alkali, and has mild alkalinity relative to sodium hydroxide, so that hydrolysis of the oryzanol can be reduced; two steps are adopted for acidification, namely, hydrochloric acid is adopted for adjusting to certain pH firstly, and citric acid with low acidity is added for adjusting to required pH, so that the yield of the oryzanol can be up to 80 percent.

Description

technical field [0001] The invention relates to a process for extracting oryzanol, in particular to a method for extracting oryzanol in rice oil. Background technique [0002] Oryzanol is the combined fat of ferulic acid and phytosterol, which exists in the grain of cereal plants. The appearance of pure oryzanol is white to light yellow crystalline powder, insoluble in water. Oryzanol is mainly used in pharmaceuticals. As an autonomic regulator, it has obvious curative effects on the treatment of autonomic disorders. It is mainly used clinically for various autonomic dysfunctions caused by dysfunction of the hypothalamus, diencephalon, and limbic system, and menopausal syndrome. syndrome, sequelae of traumatic brain injury, etc. In addition, oryzanol can also be used as a food additive. Adding 2% oryzanol to milk powder for the elderly can resist the absorption of cholesterol, adding oryzanol to beverages as a nutritional drink, and adding oryzanol to bread and biscuits can...

Claims

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Application Information

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IPC IPC(8): C07J53/00
CPCC07J53/001
Inventor 王月华房涛韩娜刘纪湘李文娟程芳园
Owner SHANDONG SANXING CORN IND SCI CO LTD
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