A process for the recovery of volatile aroma compounds from vegetable material

A plant material, volatile technology, applied in tea spices, food science, essential oils/spices, etc., can solve problems such as inability to use

Active Publication Date: 2012-10-03
EKATERRA RES & DEV UK LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This process requires special equipment and cannot be used in conventional drying processes

Method used

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  • A process for the recovery of volatile aroma compounds from vegetable material
  • A process for the recovery of volatile aroma compounds from vegetable material
  • A process for the recovery of volatile aroma compounds from vegetable material

Examples

Experimental program
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Embodiment Construction

[0070] The invention is now demonstrated using examples. The examples are for illustration only and do not limit the scope of the invention in any way.

[0071] Effect of Injected Steam

[0072] The experiment was carried out by exposing 180 g of black tea leaves (from Kenya) as plant material to air. The temperature of the air entering the dryer was 110° C., and the moisture content was 11 g / kg of dry air. The plant material contained 2.33 kg of moisture per kg dry weight of plant material. The flow rate of air entering the dryer was 3.2 kg / hr. The total air exposure was 40 kg per kg dry weight of plant material. Dryer exhaust consists of an air stream carrying aroma volatiles and moisture released from the plant material during the drying process. Injection of steam at a temperature of 100°C and a rate of 96 g / hr into the dryer exhaust stream produces a gaseous mixture. The amount of steam added was 30 g / kg of gaseous mixture. The gaseous mixture was fed to a spiral...

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Abstract

A process for the recovery of volatile aroma compounds from a vegetable material comprising the steps of: a. contacting the vegetable material with a gas in a dryer wherein the amount of moisture in the gas entering the dryer is less than 15 g/kg dry gas; b. contacting the dryer exhaust gas stream with water vapour or steam to obtain a gaseous mixture, and; c. condensing the gaseous mixture to recover a condensate comprising volatile aroma compounds.

Description

technical field [0001] The present invention relates to a method for the recovery of volatile aroma compounds from plant material. In particular, it relates to a method for recovering volatile aroma compounds from tea leaves. Background of the invention [0002] The recovery of volatile aroma compounds during processing of plant material is known. [0003] JP2005087122A2 (SHOWA NOUGEI KK, disclosed in 2005) discloses a production method of coffee spices, including the process of contacting roasted coffee beans with steam to extract the spice components of coffee beans in steam; A step of condensing water vapor to obtain a condensate containing the fragrance components; and a step of re-extracting the obtained condensate with a fatty acid ester of glycerin, preferably triacetin (glycerol triacetate). This method requires a separate subsequent step of drying the plant material, resulting in additional energy consumption and process complication. Even when the plant material...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A23F3/42A23L1/221A23L27/10
CPCC11B9/027A23F3/426A23L1/2217A23L1/2212A23L27/105A23L27/115
Inventor R·卡克G·辛格A·古普塔
Owner EKATERRA RES & DEV UK LTD
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