Method for extracting plant sterol from plant oil asphalt

A technology of vegetable oil asphalt and phytosterols, which is applied in the field of extracting phytosterols, can solve the problems of low product cost, and achieve the effects of low cost, easy access to solvents, and broad prospects

Inactive Publication Date: 2006-07-26
NANJING UNIV OF TECH
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  • Summary
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The present invention solves the deficiencies and problems existing in the above-mentioned prior art, and provides a method for extracting

Method used

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  • Method for extracting plant sterol from plant oil asphalt

Examples

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Effect test

Embodiment 1

[0020] Add 1kg of vegetable oil asphalt, 640ml of methanol and 50ml of concentrated sulfuric acid into a reaction kettle with a stirrer, reflux condenser and heating jacket, heat to 68°C under the conditions of stirring and reflux, and then heat for 3 hours, add 640ml of 80°C hot water, continue to heat the reflux reaction mixture for 10 minutes, stop the reaction, the reactant is cooled to room temperature, and the reactant is separated into layers. The water, sulfuric acid and methanol phase of the lower layer were discarded to obtain the upper oil layer, which contained most of the sterols and sterol esters and fatty acid esters esterified by methanol, so they were separated and collected.

[0021] Wash the oil layer with hot water at 90°C until neutral, pour the obtained neutral oil layer and 2.0L of methanol into the reaction kettle, extract in a conventional extraction system, add 150g of potassium hydroxide at 65°C, and continue the reflux reaction for 2.5 hours When co...

Embodiment 2

[0025] Add 1kg of vegetable oil asphalt, 450ml of methanol and 50ml of concentrated sulfuric acid into a reaction kettle with a stirrer, a reflux condenser and a heating mantle, heat to 68°C under stirring and reflux, and then heat the reaction for 3 hours, add 450ml of 80 ℃ hot water, continue to heat and reflux the reaction mixture for 10 minutes, stop the reaction, cool the reactant to room temperature, and the reactant is separated into layers. The water, sulfuric acid, and methanol phase of the lower floor were discarded to obtain the upper oil layer; all the other extraction steps were the same as in Example 1, resulting in 53.5g of crude sterols with a melting point of 138°C and an extraction rate of sterols of 5.35%.

Embodiment 3

[0027] Add 5.2kg of vegetable oil asphalt, 3.0L of methanol and 200ml of concentrated sulfuric acid into a reaction kettle with a stirrer, a reflux condenser and a heating mantle, heat to 70°C under the conditions of stirring and reflux, and then heat the reaction for 2 hours, add 3.0L of hot water at 100°C, continue to heat and reflux the reaction mixture for 10 minutes, stop the reaction, cool the reactant to room temperature, and the reactant is separated into layers. The water, sulfuric acid and methanol phase of the lower layer were discarded to obtain the upper oil layer, which contained most of the sterols and sterol esters and fatty acid esters esterified by methanol, so they were separated and collected.

[0028] Wash the oil layer with hot water at 90°C until neutral, pour the obtained oil layer and 7.8L of methanol into the reactor, extract in a conventional extraction system, add 780g of potassium hydroxide at 65°C, and continue the reflux reaction for 4.5 hours. W...

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Abstract

The invention discloses a method wwhich extracts phytosterol from vegetable oil asphaltum, the technology of this method is simple, and the material is cheap and facile, the productivity of product is high, the cost of product is low. The method of this invention is translating the free fatty acid of material into fatty acid ester by using esterification, getting oil phase containing much sterol ester by wash, then getting the product via the alcoholysis of free fatty acid in material by organic solvent, forming a fire-new process flow, realizing the of natural sterol.

Description

technical field [0001] The invention relates to a method for extracting sterols, more particularly to a method for extracting phytosterols from vegetable oil pitch. Background technique [0002] Phytosterols widely exist in plants and plant seeds. They are one of the components of cell membranes in plants and the precursors for the biosynthesis of various hormones and steroids. Studies have found that the content of sterols in vegetable oil waste is relatively rich. At present, the raw materials commonly used to extract phytosterols are mainly by-products of the vegetable oil industry, such as alkali refining soapstock, deodorized distillate, hydration oil foot, waste clay, fatty acid distillation residue, etc. Among them, the deodorized distillate is currently the main raw material used to extract sterols, and there are few domestic reports on the extraction of sterols from vegetable oil pitch as a raw material, and more studies abroad are on the extraction of sterols from ...

Claims

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Application Information

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IPC IPC(8): C07J9/00
Inventor 姚成叶爱英徐永林陆为林
Owner NANJING UNIV OF TECH
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