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Improved process for extracting sterol from vegetable oil asphalt

A technology of vegetable oil asphalt and sterols, which is applied in the field of extracting sterols, can solve the problems of large solvent loss and cumbersome treatment process, and achieve the effects of small solvent loss, good selectivity, and simple and easy process

Inactive Publication Date: 2009-04-22
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the crude sterols are purified by washing with a mixture of methanol and water and then rinsed with water. The treatment process is cumbersome and the solvent loss is large.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Add 30g of vegetable oil asphalt into the reaction kettle with stirrer, reflux condenser and water bath, heat to 95°C under the condition of stirring and reflux, then add 12g of sodium hydroxide and a small amount of water for saponification by heating for 0.5 hours, add 99g 95°C hot water, continue to heat and reflux for 2 hours, stop the reaction, cool the reactant at a temperature of 15°C, and separate the reactants. Discard the saponified liquid in the lower layer, and keep the unsaponifiable matter in the upper layer, which contains a certain amount of glycerides and fatty acids that have not been completely saponified, so they must be separated and collected.

[0020] Pour the unsaponifiable matter of the upper layer and 75g of isopropanol into the reaction kettle, add 6g of potassium hydroxide, extract in a conventional extraction system, reflux for 4 hours, and add 90g of 80°C hot water when the temperature is cooled to below 50°C water, continue to heat and ref...

Embodiment 2

[0023] Add 40g of vegetable oil asphalt into the reaction kettle with stirrer, reflux condenser and water bath, heat to 95°C to melt, add 16g of sodium hydroxide and a small amount of hot water, continue to react for 2 hours, stop the reaction, and let it stand Cool, after layering, collect the unsaponifiable matter in the upper layer and heat to dissolve, add 100g of isopropanol and 9g of potassium hydroxide, heat to 80°C and reflux for 4 hours, stop the reaction, cool the reaction solution to 50°C and add 120g of 95°C hot water , continue the reflux reaction for 30 minutes, stop the reaction, and let it stand for cooling at a temperature of about 15°C for 3 days to precipitate sterols. Filter with a sand core funnel to get crude sterol, then wash it three times with n-hexane solution, the operating temperature is 28°C, the dosage is 18 times the mass of crude sterol, collect the filtrate, evaporate the solvent and put it in a vacuum drying oven at 50-60°C Drying in medium te...

Embodiment 3

[0025] Add 40g of vegetable oil asphalt, 16g of sodium hydroxide and a small amount of water into a reaction kettle with a stirrer, reflux condenser and water bath, heat to 95°C to maintain the saponification reaction for 0.5 hour, then add 132g of hot water, and continue the reaction under reflux for 2 Hours, after standing and cooling at a temperature of about 15°C for 2.5 hours, obvious stratification was found, the saponified liquid in the lower layer was discarded, the unsaponifiable matter in the upper layer was collected, 100g of isopropanol and 9g of potassium hydroxide were added, heated to 83°C, and the reaction was refluxed After 4 hours, stop the reaction, let the reaction solution cool to 50°C, add 120g of hot water, continue the reaction and reflux for 25 minutes, stop the reaction, let stand and cool at a temperature of about 15°C for 2 days, and precipitate sterols. Filter with a sand core funnel to get crude sterol, then wash it three times with cyclohexane sol...

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Abstract

The invention discloses an improved method for extracting phytosterol from asphalt of vegetable oil. The method has a simple process, high product purity and low product cost. The improved method comprises the following steps: (1) the asphalt of the vegetable oil is heated and melted at a temperature of between 80 and 100 DEG C, is added with alkali and water, is kept at the temperature, is continuously stirred and saponified for 0.5 hour, is added with hot water, is continuously heated, reflows and reacts for 1.5 to 2.5 hours; a saponification reaction solution is cooled and delaminated; the collected unsaponified layer is added with alcohol with 2 to 3 times of the weight of the raw material of the asphalt, is added with alkali, is heated to a temperature of between 75 and 85 DEG C, reflows for 3 to 5 hours and is stopped to heat and stir; after the solution is cooled to the temperature of 50 DEG C, the solution is added with hot water and continuously reacts and reflows for 10 to 30 minutes; and after the solution is fully cooled, the phytosterol is precipitated out and filtered to obtain a coarse product of the phytosterol; and (2) the coarse phytosterol is eluted through an organic solvent; a filtrate evaporation solvent is put to a vacuum dry box and is dried at a temperature of between 50 and 60 DEG C to obtain the phytosterol product.

Description

technical field [0001] The invention relates to a method for extracting sterols, more particularly to an improved method for extracting sterols from vegetable oil pitch. Background technique [0002] Phytosterols are a class of biologically active natural compounds that widely exist in roots, stems, leaves and seeds of plants. They are one of the components that form cell membranes in plants and are also precursors for the biosynthesis of various hormones and steroids. Phytosterols have been widely used in medicine, cosmetics, food (including aviation food), feed and other fields. [0003] The source of vegetable oil asphalt is to extract vegetable oil, such as rapeseed oil, soybean oil, peanut oil, cottonseed oil, etc. The final process is hydration degumming, active soil decolorization, decompression deodorization, alkali refining and deacidification to form soapstock. Acidification treatment into mixed fatty acids with high acid value, and then distilling various fatty a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07J75/00C07J9/00
Inventor 姚成贾凤徐永林
Owner NANJING UNIV OF TECH
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