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Separation method of oleic acid and linoleic acid in tea seed oil

A technology of tea seed oil and separation method, which is applied in the directions of fat oil/fat separation, fatty acid production, fatty acid preparation/refining, etc., can solve the problems of high cost, easy residual toxic solvents, high energy consumption, etc., and achieve the effect of improving purity

Active Publication Date: 2016-02-10
GUIZHOU ZHOUYIQING BIOTECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Conventional methods for separating oleic acid and linoleic acid include molecular distillation, organic solvent method, supercritical extraction method, derivative method, adsorption method, etc. Among them, molecular distillation method and supercritical extraction method are too expensive and consume a lot of energy; organic solvent method Poisonous solvents are easy to remain; and the scale of derivative method and adsorption method is too small and only suitable for small-scale experimental research

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] A method for separating oleic acid and linoleic acid in tea seed oil, the steps are as follows:

[0058] (1) Weigh the tea seed oil, add 3 times the weight volume of 10% NaOH-90% ethanol solution, stir slowly and heat up to 75°C, saponify and reflux for 2 hours, dissolve in warm water, adjust the pH to 2-3 with 20% HCl , stirred at constant temperature for 15 minutes, allowed to stand to separate layers, took the oil layer and washed it with saturated brine until neutral, dried over anhydrous sodium sulfate to obtain mixed fatty acids;

[0059] (2) Add 1.5 times of absolute ethanol to the above mixed fatty acid to dissolve, place it at 7°C for 24 hours, filter, take the filtrate and add water to separate layers, take the oil layer and wash it with saturated saline until neutral, dry it with anhydrous sodium sulfate to obtain fatty acid;

[0060] (3) Urea and 95% ethanol are put into a container according to the mass volume ratio of 1:3, and the urea is fully dissolved b...

Embodiment 2

[0062] A method for separating oleic acid and linoleic acid in tea seed oil, the steps are as follows:

[0063] (1) Weigh the tea seed oil, add 2 times the volume of 10% NaOH-90% ethanol solution, stir slowly to 70°C, saponify and reflux for 1 hour, dissolve in warm water, adjust the pH to 2-3 with 20% HCl , stirred at constant temperature for 10 minutes, allowed to stand and separate layers, took the oil layer and washed it with saturated brine to neutrality, dried over anhydrous sodium sulfate to obtain mixed fatty acids;

[0064] (2) Add an equal mass of absolute ethanol to the above mixed fatty acid to dissolve, place at 4°C for 18 hours, filter, take the filtrate and add water to separate layers, take the oil layer and wash it with saturated saline until neutral, dry it with anhydrous sodium sulfate to obtain fatty acid;

[0065] (3) Urea and 95% ethanol are put into the container according to the mass volume ratio of 1:2, and the urea is fully dissolved by heating to ref...

Embodiment 3

[0067] A method for separating oleic acid and linoleic acid in tea seed oil, the steps are as follows:

[0068] (1) Weigh the tea seed oil, add 10% NaOH-90% ethanol solution of 4 times the weight volume, stir slowly and heat up to 75°C, saponify and reflux for 3 hours, dissolve in warm water, adjust the pH to 2-3 with 20% HCl , stirred at constant temperature for 20 minutes, allowed to stand for stratification, washed the oil layer with saturated brine until neutral, dried over anhydrous sodium sulfate to obtain mixed fatty acids;

[0069] (2) Add 2 times of absolute ethanol to the above mixed fatty acid to dissolve, place at 8°C for 24 hours, filter, take the filtrate and add water to separate layers, take the oil layer and wash it with saturated saline until neutral, dry it with anhydrous sodium sulfate to obtain fatty acid;

[0070](3) Urea and 95% ethanol are put into the container according to the mass volume ratio of 1:4, heated to reflux to fully dissolve the urea to ma...

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Abstract

The invention discloses a separation method of oleic acid and linoleic acid in tea seed oil, which includes the steps of: saponifying and acidifying the tea seed oil to obtain mixed fatty acid; pre-removing saturated fatty acid through a freezing crystallization method; and finally purifying the oleic acid and the linoleic acid through a urea inclusion method. In the method, the saturated fatty acid is separated in a certain degree by means of difference of melting point of the saturated fatty acid and unsaturated fatty acid for the first time, and then saturated and monounsaturated fatty acids are separated from polyunsaturated fatty acids through the urea inclusion to further prepare the oleic acid and the linoleic acid at high purity. Compared with the prior art, synchronous separation of the oleic acid and the linoleic acid in the tea seed oil is achieved. The method not only enriches the oleic acid in the tea seed oil but also separates the linoleic acid, and meanwhile increases the purities of the oleic acid and the linoleic acid. The method solves the problem that only is the oleic acid or the linoleic acid can be separated individually in the prior art and increases the additional value of products and raw material utilization rate.

Description

technical field [0001] The invention belongs to the field of oil extraction and processing, and in particular relates to a method for separating oleic acid and linoleic acid in tea seed oil. Background technique [0002] Tea seed is the fruit of Camellia Sinensis O.Ktze. in the family Theaceae. my country is the hometown of tea. The existing tea garden area is about 32 million mu. However, tea has only been used as the main industry for a long time. Tea seed has not been widely awareness and attention. The ratio of saturated fatty acid, monounsaturated fatty acid and polyunsaturated fatty acid in tea seed oil is about 1:1.7:1, which is close to the 1:1:1 recommended by the international community. It is an ideal edible oil; long-term consumption of tea seed oil can Reduce high blood pressure, high blood fat and other cardiovascular and cerebrovascular diseases, enhance human immunity, effectively reduce cholesterol, etc. [0003] Tea seed oil is rich in oleic acid and linol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C11B7/00C11C1/02
Inventor 王晓琴黄兵兵黄东方
Owner GUIZHOU ZHOUYIQING BIOTECH
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