Method for extracting high-purity tea polyphenol

An extraction method and technology of tea polyphenols, applied in the field of extraction of high-purity tea polyphenols, can solve problems such as reducing the function of tea polyphenols, achieve the effects of improving decomposition, improving permeability, and increasing extraction rate

Inactive Publication Date: 2018-01-16
宁国市绿园家庭农场
View PDF0 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention is aimed at the existing problems: in terms of extraction, both tea polyphenols and caffeine in tea have strong solubility to water and ethanol, and using water and alcohol extraction methods will cause more caffeine components to be contained in tea polyphenols, which will reduce the The function of tea polyphenols

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A method for extracting high-purity tea polyphenols, comprising the following steps:

[0020] (1) Pretreatment: Wash and freeze-dry the fresh tea leaves after picking to a moisture content of 15.4%, then pulverize them to make tea powder, and then oscillate in an ultrasonic wave. The irregular oscillation waves generated will cause the cells to be squeezed and damaged , the effective components in the cells are separated out, the extraction rate of the active components is improved, and the processed tea powder is obtained;

[0021] (2) Ammonification: add ammonia water and nitrogen-fixing bacillus agent to the treated tea powder, mix well and then carry out ammoniation treatment in a vacuum tank. For the content of caffeine in tea powder, first ammoniation at 44°C for 4.5 hours, and then at 58°C for 2.5 hours, can improve the permeability of ammonia water to tea powder, increase the removal of caffeine, cool and dry to The moisture content is 19%, and the ammoniated t...

Embodiment 2

[0032] Present embodiment 2 is compared with embodiment 1, and step changes in the following aspects:

[0033] For the freeze-drying described in step (1), the temperature is -7°C, and the freezing time is 3 hours.

[0034] The vibration processing described in step (1), the method is:

[0035] Put the tea powder into an ultrasonic oscillator, first oscillate at a frequency of 28kHz for 4 minutes, then oscillate at a frequency of 33kHz for 3 minutes, and alternately oscillate 8 times at 28kHz and 33kHz.

[0036] The ammonification treatment described in step (2), its process parameter is:

[0037] It was first ammoniated at 46°C for 5 hours, and then at 61°C for 3 hours.

[0038] The ammonia water in step (2) is added in an amount of 8.5% of the treated tea powder; the added amount of the nitrogen-fixing bacteria agent is 4.8% of the treated tea powder.

[0039] Step (3) magnetization fermentation, the process parameters are:

[0040] Grind the ammoniated tea powder, add wat...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a method for extracting high-purity tea polyphenol. The method comprises the following steps: (1) pretreatment: subjecting fresh tea leaves to cleaning, freeze drying and ultrasonic oscillation successively; (2) ammonification: adding water and nitrogen-fixing bacteria into treated tea leave powder and respectively carrying out ammonification under the conditions of a temperature of 43 to 47 DEG D and a temperature of 57 to 62 DEG D; (3) magnetic fermentation: adding water and a mixed bacterial agent into the tea leave powder having undergone ammonification and respectively carrying out fermentation under the conditions of a vacuum degree of 70 to 80% and a vacuum degree of 100%; (4) extraction: adding ethanol into the fermented tea leave powder, carrying out boiling and centrifugal filtering successively and washing filter residues with ethanol; and (5) high-temperature boiling: adding zinc gluconate into the extract of the tea leave powder and carrying out evaporation under the conditions of high temperature and low pressure. The tea polyphenol prepared by using the method in the invention is improved by 8.08% in extraction rate, by 6.85% in extraction purity and by 9.6% in drug effect improvement rate compared with a control group.

Description

technical field [0001] The invention belongs to the technical field of tea deep processing, and in particular relates to a method for extracting high-purity tea polyphenols. Background technique [0002] Tea polyphenols is the general term for polyphenols in tea, including catechins, anthocyanins, flavonoids, flavonols and phenolic acids, among which catechins account for 60%-80%, and tea polyphenols Phenol is the main functional component of tea, and its content directly affects the functionality of tea. It has various functions such as antibacterial and detoxification, anti-oxidation, scavenging free radicals, delaying aging, and anti-radiation. Widely used in medicine, food and chemical industry and other fields. Tea polyphenols have good solubility in water and ethanol, and have good heat resistance and acid resistance, and can be heated at 250°C; while the caffeine contained in tea also has good solubility in water and ethanol , Tea polyphenols extracted by water or e...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): A61K36/82A61P9/12A61P3/06
Inventor 胡慧玲
Owner 宁国市绿园家庭农场
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap