Method for extracting sesamin from sesame seed husks

An extraction method and a technology for sesame seed coat are applied in the field of extracting and purifying sesamin, and can solve problems such as high cost, residual pollution of organic solvents, and complicated extraction process.

Active Publication Date: 2014-07-02
HENAN SESAME RES CENT HENAN ACADEMY OF AGRI SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, people mainly extract sesamin from sesame seeds, sesame oil, and sesame cakes, mainly using sesame, sesame oil, sesame cakes, oil foot waste, etc. as raw materials, through vacuum distillation, organic solvent extraction, and supercritical CO2 extraction. , concentrated crystallization and other processes to extract sesamin, but the content of sesamin in these raw materials is very low, resulting in cumbersome extraction process, serious residual organic solvent pollution and high cost, which is not conducive to large-scale industrial production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] 1. Put the sesame seed coat into a closed extraction tank, extract with 85% ethanol, the ratio of solid to liquid is 1:10 (w / v), and extract for 12 hours under the condition of stirring at 75°C, and the stirring speed is 150r / min ; The transfer rate of sesamin from the sesame seed coat was 78.0%.

[0020] 2. Filter the leaching material to obtain a sesamin-enriched leaching solution, and filter using a 500-mesh filter under airtight conditions at a temperature of 75°C.

[0021] 3. Concentrating the extract to 10% of the original weight by distillation under reduced pressure, while recovering ethanol. The vacuum distillation adopts a wiped film evaporator, the vacuum degree of the wiped film evaporation is 10.0Pa, the evaporation temperature is 80.0°C, and the feed rate is 150kg / 1h;

[0022] 4. Cool the extract to 0°C to crystallize the sesamin to obtain the crude product. After filtering the crude product, recrystallize twice to obtain high-purity sesamin with a purity...

Embodiment 2

[0024] 1. Put the sesame seed coat into a closed extraction tank, extract with 95% ethanol, the ratio of solid to liquid is 1:10 (w / v), and extract for 12 hours under the condition of stirring at 75°C, and the stirring speed is 150r / min ; The transfer rate of sesamin from the sesame seed coat is over 90%.

[0025] 2. Filter the leaching material to obtain a sesamin-enriched leaching solution, and filter using a 500-mesh filter under airtight conditions at a temperature of 75°C.

[0026] 3. Concentrating the extract to 10% of the original weight by distillation under reduced pressure, while recovering ethanol. The vacuum distillation adopts a wiped film evaporator, the vacuum degree of the wiped film evaporation is 10.0Pa, the evaporation temperature is 100.0°C, and the feed rate is 200kg / 1h:

[0027] 4. Cool the extract to 4° C. to crystallize the sesamin to obtain a crude product. After filtering the crude product, recrystallize twice to obtain high-purity sesamin with a pur...

Embodiment 3

[0029] 1. Put the sesame seed coat into a closed extraction tank, extract with absolute ethanol, the ratio of solid to liquid is 1:10 (w / v), and extract for 12 hours under the condition of stirring at 75°C, and the stirring speed is 150r / min ; The transfer rate of sesamin from the sesame seed coat is over 90%.

[0030] 2. Filter the leaching material to obtain a sesamin-enriched leaching solution, and filter using a 500-mesh filter under airtight conditions at a temperature of 75°C.

[0031] 3. Concentrating the extract to 10% of the original weight by distillation under reduced pressure, while recovering ethanol. The vacuum distillation adopts a wiped film evaporator, the vacuum degree of the wiped film evaporation is 10.0Pa, the evaporation temperature 1) is 0.0°C, and the feed rate is 250kg / 1h:

[0032] 4. Cool the extract to 8° C. to crystallize the sesamin to obtain a crude product. After filtering the crude product, recrystallize twice to obtain high-purity sesamin with...

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Abstract

The invention discloses a method for extracting sesamin from sesame seed husks. The method comprises the following steps: by adopting by-products, namely sesame seed husks obtained after sesame peeling as raw materials, firstly extracting the sesame seed husks with an organic solvent, and then adopting a low-temperature crystallization method after concentrating the extracting solution, thus obtaining high-purity sesamin. The purity of sesamin obtained by the method can reach 95%, so that the method is obviously better than existing methods. Meanwhile, the method avoids pollution caused by any harmful substance, has the characteristics of simplicity in operation, stable process, low extraction cost, high economic benefits and the like, and can be used for industrially extracting sesamin in a large scale.

Description

technical field [0001] The invention relates to a method for extracting and purifying sesamin from sesame seed coats. Background technique [0002] Sesame is one of the important high-quality oil crops in my country. Its seeds contain 45.0-61.0% oil, 16.0-26.0% protein, and contain lignan antioxidant substances such as sesamin and sesamolin, which have good health effects. [0003] Sesamin is a nutritional ingredient in sesame, usually needle-like or powdery white solid, molecular weight 354.36, melting point 121-123 °C, insoluble in water, acid and alkali, easily soluble in acetone, chloroform, ethyl acetate, etc. Organic solvents. A large number of studies on the physiological functions of sesamin at home and abroad have shown that sesamin has strong anti-oxidation, liver protection, lowering cholesterol, anti-hypertensive, inhibiting breast cancer and immune activation and other physiological functions, and has a wide range of health care and pharmaceutical application p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D493/04
CPCC07D493/04
Inventor 张海洋王永宏苗红梅李春明李凤翮
Owner HENAN SESAME RES CENT HENAN ACADEMY OF AGRI SCI
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