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Yunnan black tea essential oil and preparation method thereof

A technology of essential oil and Dianhong tea, applied in the field of natural plant essential oils, can solve the problems such as no reports on the application of supercritical fluid extraction-molecular distillation combined technology, and achieve the effect of high extraction efficiency

Active Publication Date: 2013-05-08
云南天宏香精有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, there is no report on the application of supercritical fluid extraction-molecular distillation combined technology in the refining of tea essential oil at home and abroad

Method used

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  • Yunnan black tea essential oil and preparation method thereof

Examples

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Comparison scheme
Effect test

Embodiment 1

[0022] Take 300g of Dianhong tea powder, add it to a 1000mL supercritical fluid extraction tank, and use CO 2 As a supercritical fluid, the flow rate is 0.5L / h. When the temperature rises to 30°C and the pressure reaches 10MPa, start timing. Keep this condition and run for 10 hours, then stop, and separate crude oil 25g from the separation tank. Add the prepared crude oil into the vacuum degassing tank of molecular distillation, degas for 20 minutes, and then send the material into the continuous evaporator at a uniform rate through the flow meter, the vacuum degree is controlled at 0.1Pa, and the distillation temperature is controlled at 30°C, the condensation temperature is 10°C, the rotation speed is 250 rpm, and 17g of Dianhong tea essential oil is obtained after distillation for 3 hours. The obtained Dianhong tea essential oil is a light red transparent oily liquid, which has the characteristic tea aroma and floral aroma of Dianhong. The aroma quality, intensity, and fr...

Embodiment 2

[0024] Take 400g of Dianhong tea powder, add it to a 1000mL supercritical fluid extraction tank, and use CO 2 As a supercritical fluid, the entrainer is 40% ethanol aqueous solution by mass fraction, the volume ratio of entrainer to Dianhong tea powder is 15:100, the flow rate is 2L / h, and the timing starts when the temperature rises to 40°C and the pressure reaches 15MPa. Keep this condition to run for 5 hours, then stop, and separate crude oil 41g from the separation tank. Add the prepared crude oil into the vacuum degassing tank of molecular distillation, degas for 30 minutes, and then send the material into the continuous evaporator at a uniform rate through the flow meter, the vacuum degree is controlled at 75Pa, and the distillation temperature is controlled at 45 ℃, the condensation temperature is 0 ℃, the rotation speed is 250 rpm, and 31g of Yunnan black tea essential oil is obtained after distillation for 2 hours. The obtained Dianhong tea essential oil The properti...

Embodiment 3

[0026] Take 500g of Dianhong tea powder, add it to a 1000mL supercritical fluid extraction tank, and use NO 2 As a supercritical fluid, the entrainer is 95% ethanol aqueous solution, the volume ratio of entrainer to Dianhong tea powder is 30:100, the flow rate is 5L / h, and the timing starts when the temperature rises to 50°C and the pressure reaches 20MPa. Keep this condition and run for 2 hours, then stop, from the separation tank middle fluid crude oil 66g. Add the prepared crude oil into the vacuum degassing tank of molecular distillation, degas for 40 minutes, and then send the material into the continuous evaporator at a uniform rate through a flow meter, control the vacuum degree at 150Pa, and control the distillation temperature at 60 °C, the condensation temperature is -15 °C, the rotation speed is 250 rpm, and 43 g of Dianhong tea essential oil is obtained after distillation for 1 hour. The properties and quality of the obtained Dianhong tea essential oil are the sam...

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Abstract

The invention relates to a Yunnan black tea essential oil and a preparation method thereof. The essential oil is prepared by a supercutical fluid extraction-molecular distillation combination technique. The preparation method comprises the following steps: carrying out supercritical extraction on Yunnan black tea, and carrying out molecular distillation to obtain the Yunnan black tea extract. Compared with the traditional extraction method, the invention adopts the newest supercutical fluid extraction-molecular distillation combination technique, has the advantage of high extraction efficiency, does not introduce any harmful organic reagent, and obtains the Yunnan black tea essential oil with no solvent residue and with good scent and quality under the conditions of low temperature and low pressure. The method is simple to operate, has the advantages of high extraction rate and no pollution, and provides an efficient green environment-friendly extraction separation method for preparing Yunnan black tea essential oil.

Description

technical field [0001] The invention relates to the technical field of natural plant essential oils, in particular to a Yunnan black tea essential oil and a preparation method thereof. Background technique [0002] Black tea is a kind of fully fermented tea, which is the main tea product in tea culture. Black tea uses the buds and leaves of tea trees as raw materials, and is refined through the steps of picking, withering, rolling, fermenting, and drying. After black tea is processed and fermented, new components of theaflavins and theaflavins are produced. Aroma substances increased from more than 50 kinds in fresh leaves to more than 300 kinds, and some caffeine, catechins and theaflavins complexed into complexes with beautiful fragrance. It has the functions of helping gastrointestinal digestion, promoting appetite, diuresis, eliminating edema, strengthening the heart, antibacterial and eliminating free radicals, etc. It is a kind of green natural spice plant widely us...

Claims

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Application Information

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IPC IPC(8): C11B9/02
Inventor 宋红平刘刚冯伟博洪林军杨柳斌聂铭冯磊
Owner 云南天宏香精有限公司
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