Method for decoloring food-grade alkali/ester combined refining zanthoxylum seed oil

A food-grade technology for pepper seed kernels, applied in the field of decolorization of pepper seed kernel oil, can solve the problems of high refining consumption acid value ratio, low refined oil yield, and no application value, and achieve high refining rate and low acid value , low cost effect

Inactive Publication Date: 2016-08-03
CHONGQING TECH & BUSINESS UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Xue Kaifa and others used the traditional process of oil refining to carry out alkali refining, decolorization and dewaxing research on Zanthoxylum bungeanum seed oil. The main problems are that the acid value ratio of refining consumption is high and the yield of refined oil is low.
Liu Xiong et al. on supercritical CO 2 The extraction and refining of Zanthoxylum bungeanum seed oil has been studied, and the acid value is 2.1mg / g (calculated by KOH), and the best effect of oil yield is 76.32%. For the pepper seed oil with low value, it has no application value in production

Method used

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  • Method for decoloring food-grade alkali/ester combined refining zanthoxylum seed oil
  • Method for decoloring food-grade alkali/ester combined refining zanthoxylum seed oil
  • Method for decoloring food-grade alkali/ester combined refining zanthoxylum seed oil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Example 1: at N 2 Under protection, weigh 20g of Zanthoxylum bungeanum seed oil in a three-necked reflux flask, add 12mL of NaOH solution with a concentration of 4% and 10mL of ethyl acetate, stir well and put it in a water bath at 50°C for 30min to fully react. Take it out and cool it to room temperature, and then perform centrifugation (rotating speed is 8000r / min, time is 10min). The supernatant after extraction and centrifugation is subjected to vacuum distillation (80° C.) to finally obtain refined decolorized oil and recover ethyl acetate, while recovering the lower solid by-product fatty acid sodium salt. The refined decolorized oil obtained through testing has a refining rate of 92.80% and a chroma of R2.0Y20.9.

Embodiment 2

[0023] Example 2: at N 2 Under protection, weigh 20g of Zanthoxylum bungeanum seed oil in a three-necked reflux flask, add 12mL of NaOH solution with a concentration of 2% and 10mL of ethyl acetate, stir well and place it in a water bath at 50°C for 30min to fully react. Take it out and cool it to room temperature, and then perform centrifugation (rotating speed is 8000r / min, time is 10min). The supernatant after extraction and centrifugation is subjected to vacuum distillation (80° C.) to finally obtain refined decolorized oil and recover ethyl acetate, while recovering the lower solid by-product fatty acid sodium salt. The refined decolorized oil obtained through testing has a refining rate of 89.46%, and a chromaticity of R2.0Y25.0.

Embodiment 3

[0024] Embodiment 3: adopt the technical scheme of embodiment 1, difference is to select different reaction bath temperatures, the results are shown in Table 1.

[0025] Table 1: Effect of water bath temperature on the decolorization effect of Zanthoxylum bungeanum seed oil

[0026] Extraction temperature / ℃

[0027] It can be seen from Table 1 that the influence of temperature on the refining rate is not obvious, and the refining rate is around 90%. When the temperature is lower than 50°C, the chromaticity decreases with the increase of temperature, and when the temperature is higher than 50°C, the chromaticity increases with the increase of temperature. If the temperature is too high, it may cause saponification reaction between oil and alkali and reduce the refining rate. At the same time, if the temperature is too high, it will consume more energy and the refining cost will be higher.

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Abstract

The invention discloses a method for decoloring food-grade alkali / ester combined refining zanthoxylum seed oil. The method comprises the following steps: under N2 protection, zanthoxylum seed oil and a food-grade sodium hydroxide solution with concentration being 1-5% and ethyl acetate are placed in water-bath at the temperature of 20-80 DEG C, are fully stirred and uniformly mixed, then reacted for 30 minutes, the components are taken out and cooled to the room temperature, then the components are centrifugalized, finally a supernatant is subjected to underpressure distillation to obtain the refined and decolored oil, at the same time, ethyl acetate is recovered, and solid by-product sodium fatty acid at a lower layer is recovered. The refined decolouring oil has the advantages of low acid value, light chroma, no peculiar smell, and high refining yield, through one time treatment, the acid value and chroma can reach a national first-order standard of edible oil; ethyl acetate is recovered for reuse, the sodium fatty acid can be taken as a raw material of an industrial detergent. The method has the advantages of simple operation, low cost, and easy industrialization. The method provides scientific basis for decoloring method for the refining zanthoxylum seed oil.

Description

technical field [0001] The invention relates to a method for decolorizing pepper seed oil, in particular to a food-grade alkali / ester combined refining method for decolorizing pepper seed oil. Background technique [0002] Zanthoxylum bungeanum is the main by-product of Zanthoxylum bungeanum, accounting for more than 60% of its total mass. Zanthoxylum bungeanum is a high-quality woody oil resource with high nutritional, health and processing values. According to literature reports, the oil content in Zanthoxylum bungeanum is 20% to 25%, about 85% of its fatty acid composition is unsaturated fatty acid, and the content of unsaturated fatty acids linoleic acid and linolenic acid necessary for human body is more than 50%. The oil is also rich in Ca, Mg, Fe, Zn, Sr, Mn and other mineral elements necessary for the human body. It is also a kind of oil with great development potential. Zanthoxylum bungeanum seed oil can not only be used as edible oil to alleviate the shortage of e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C11B3/00A23D9/04
Inventor 殷钟意郑旭煦崔榕刘荣
Owner CHONGQING TECH & BUSINESS UNIV
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