Black Tea Extract and Preparation Method Therefor

• US 20190327999A1
• Filed: 07/19/2017
• Published: 10/31/2019
• Est. Priority Date: 01/13/2017
• Status: Abandoned Application

• Current Assignee: Shanghai Ke Bao Biotech Co., Ltd
• Original Assignee: Shanghai Ke Bao Biotech Co., Ltd
• Inventors: Zhao, Jian, Zhu, Chenda, Jin, Beiwen
• Application Number:
  US16/477,542
• Publication Number:
  US 20190327999A1
• Time in Patent Office: Days
• CPC Class Codes: A23F 3/10 Fermentation with addition of microorganisms or enzymes
• CPC Class Codes: A23F 3/16 Tea extraction; Tea extracts; Treating tea extract; Making instant tea
• CPC Class Codes: A23F 3/18 Extraction of water soluble tea constituents A23F3/166 takes precedence; isolation of tea flavour or tea oil A23F3/42
• CPC Class Codes: A23F 3/22 Drying or concentrating tea extract A23F3/166 takes precedence
• CPC Class Codes: A23L 33/105 Plant extracts, their artificial duplicates or their derivatives

Abstract

A black tea extract, comprising 20-30% parts by weight of theaflavin and 40-50% parts by weight of catechin. The theaflavin and the catechin in the black tea extract can be obtained by conventional high-concentration tea polyphenol extraction in the art, and can also be commercially available theaflavin and catechin in the art.

Claims

1. A black tea extract, wherein, by mass fraction, comprising the following ingredients:

20-30% of theaflavins and 40-50% of catechins.

2. The black tea extract according to claim 1, wherein, the theaflavins are composed of TF1, TF2A, TF2B, and TF3, and the content of TF1, TF2A, TF2B, and TF3 in mass fraction ratio is:

TF1;

(TF2A+TF2B);

TF3=(4.8-7.1);

(8.8-11.4);

(4.3-5.2).

3. The black tea extract according to claim 1, wherein, the catechins contain ECG, EGCG, EGC, and C, and the content of ECG, EGCG, EGC, and C in mass fraction ratio is:

ECG;

EGCG;

EGC;

C=(6.0-12.6);

(24.6-29.8);

(2.4-5.6);

(0.4-0.8).

4. The black tea extract according to claim 1, wherein, the mass fraction of the theaflavins in the black tea extract is 23.1, and the mass fraction of the catechins is 46.5;

or the mass fraction of the theaflavins is 25, and the mass fraction of the catechins is 45.

11. The black tea extract according to claim 2, wherein, the catechins contain ECG, EGCG, EGC, and C, and the content of ECG, EGCG, EGC, and C in mass fraction ratio is:

ECG;

EGCG;

EGC;

C=(6.0-12.6);

(24.6-29.8);

(2.4-5.6);

(0.4-0.8).

12. The black tea extract according to claim 2, wherein, the mass fraction of the theaflavins in the black tea extract is 23.1, and the mass fraction of the catechins is 46.5;

or the mass fraction of the theaflavins is 25, and the mass fraction of the catechins is 45.

13. The black tea extract according to claim 3, wherein, the mass fraction of the theaflavins in the black tea extract is 23.1, and the mass fraction of the catechins is 46.5;

or the mass fraction of the theaflavins is 25, and the mass fraction of the catechins is 45.

5. A preparation method for a black tea extract, wherein, comprising the following steps:

(1) Pulverizing fresh tea leaves;

(2) Mixing evenly the tea polyphenols with the fresh tea leaves after pulverizing, the mass ratio of the tea polyphenols to the fresh tea leaves after pulverizing is (10-20);

1;

(3) Fermenting the evenly mixed raw materials in step (2) at a temperature range of 25-27°

C., until the mass fraction of the theaflavins in the raw materials falling within the range of 20-30% to deliver a black tea extract.

6. The preparation method according to claim 5, wherein, the pulverization treatment in step (1) is carried out by pulverizing the fresh tea leaves with a pulverizer and passing through a sieve of 80 mesh.

7. The preparation method according to claim 5, wherein, the fermentation time in step (3) is 6.5 to 7.5 hours;

and after the fermentation in step (3), tea polyphenol is further added to adjust the content of each ingredient in the black tea extract.

8. The preparation method according to claim 5, wherein, after the black tea extract is obtained in step (3), the black tea extract is extracted, concentrated, and dried to obtain a black tea extract powder.

9. The preparation method according to claim 8, wherein, the extraction is carried out with water;

or, the concentration is the concentration under reduced pressure;

or, the drying is spray drying.

10. A black tea extract prepared by the preparation method for a black tea extract according to claim 5.

14. A black tea extract prepared by the preparation method for a black tea extract according to claim 6.

15. A black tea extract prepared by the preparation method for a black tea extract according to claim 7.

16. A black tea extract prepared by the preparation method for a black tea extract according to claim 8.

17. A black tea extract prepared by the preparation method for a black tea extract according to claim 9.