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Method for removing free fatty acid in tea oil by molecular distillation

A free fatty acid and molecular distillation technology, which is applied in the field of free fatty acid removal, can solve problems such as difficult separation and oil loss

Inactive Publication Date: 2013-05-22
曹庸
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because the salt generated by acid-base neutralization is difficult to separate from the oil, and the step of washing with water is required (to reduce the residue of alkali), the separation of oil and water will lead to further loss of oil

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Embodiment 1: the extracted camellia oil obtained, under the state of standing still naturally, make impurity and grease separate, filter. Take 10kg of crude camellia oil, in molecular distillation, the vacuum degree is 0.03MPa-0.05MPa, the evaporator temperature is 220℃, the scraper speed is 150 rad / min, the injection speed is 4mL / min, and the oil sample is under the action of scraping film. When the distribution thickness is 0.1-0.2mm, it is directly added to the injector of the molecular still. In the running state, molecular distillation separates the light and heavy components according to the different free paths of the light and heavy molecules, so that the heavy components can be obtained with most of the free fatty acids and some small molecules removed, that is, the free fatty acid content is low and the acid value is low. Low tea oil, the acid value can be reduced to 0.22 mg KOH / g.

Embodiment 2

[0015] Embodiment 2: the extracted camellia oil obtained, in a state of natural standing, to separate impurities and grease, and filter. Take 10kg of crude camellia oil, in molecular distillation, the vacuum degree is 0.05MPa, the evaporator temperature is 200℃, the scraper speed is 1750rad / min, the injection speed is 3mL / min, and the distribution thickness of the oil sample under the action of scraping film is 0.2 In the state of mm, it is directly added to the injector of the molecular still. In the running state, molecular distillation separates the light and heavy components according to the different free paths of the light and heavy molecules, so that the heavy components can be obtained with most of the free fatty acids and some small molecules removed, that is, the free fatty acid content is low and the acid value is low. Low tea oil, the acid value can be reduced to 0.25 mg KOH / g.

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Abstract

The invention provides a method for removing free fatty acid in tea oil by molecular distillation. The method comprises the steps: directly adding a tea oil sample to a sample injector of a molecular still under the conditions that molecular distillation vacuum is 0.01 to 0.05 MPa, the temperature of an evaporator is 140 to 250 DEG C, the rotating speed of a scraper blade is 100 to 200rad / min, and the sample feeding speed is 3 to 12mL / min, and the distribution thickness of the oil sample under the effect of a wiping film is 0.01-0.2mm; and under the operation state, carrying out molecular distillation so as to separate light components from heavy components according to different light and heavy molecules escaping freedom degrees, so that most of the free fatty acids and some micromolecular heavy components can be removed. By adopting the method, the shortcomings that the conventional alkali refining and deacidifying technology difficultly performs separation of the salt and the oil, and the oil consumption is high during washing can be avoided, the 'alkaline flavour' is prevented from generating, the tea oil refining process is simplified, the method is convenient and fast, and the quality of the tea oil is improved.

Description

[0001] technical field [0002] The invention relates to a method for removing free fatty acid, in particular to a method for removing free fatty acid in camellia oil by molecular distillation. Background technique [0003] Camellia oil is obtained from the seeds of Camellia oleifera. It is a unique woody oil in my country. The main economic oil crops in southern China are mainly distributed in the south of the Yangtze River Basin. Hunan, Jiangxi, Guangdong, Guangxi and other provinces are its main producers. Area. The fatty acid composition of tea oil is very similar to olive oil, the best woody edible vegetable oil recognized in the world, so tea oil is known as "Oriental olive oil". "Compendium of Materia Medica" records: "Tea oil is cool in nature, has the effects of cooling blood, stopping bleeding, clearing away heat, and detoxifying. According to the "Dictionary of Chinese and Foreign Medicine", tea oil is not only rich in nutrition, but also promotes the secreti...

Claims

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Application Information

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IPC IPC(8): C11B3/12C11B3/16
Inventor 曹庸管晓盛车科
Owner 曹庸
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