Preparation method of low-caffeine instant black tea

Abstract

The invention relates to the technical field of deep processing of tea leaves, in particular to a preparation method of low-caffeine instant black tea. The method comprises the following steps: 1) blending at least two kinds of black tea leaves in proportion; 2) putting the blended tea leaves into an extraction tank, adding water for primary extraction and removing tea water, and then adding waterfor secondary extraction to obtain tea water after secondary extraction; 3) performing centrifugal filtration on the tea water after secondary extraction to obtain clear tea water; 4) concentrating the clear tea water; 5) heating the concentrated tea water to a reaction temperature, then adding a processing aid, and carrying out a decomposition reaction to reduce the content of caffeine; and 6) after the reaction is finished, performing sterilizing and drying to obtain the low-caffeine instant black tea. According to the preparation method of the low-caffeine instant black tea, the decomposition reaction is carried out by adding the proper processing aid, so that the content of caffeine in the black tea can be effectively reduced, the loss of functional components of the black tea can bereduced, harmful residues are avoided, and thereby the preparation method has the advantages of simple equipment, simple and convenient steps, low production cost and easiness in popularization.

Description

technical field [0001] The invention relates to the technical field of tea deep processing, in particular to a preparation method of low-caffeine instant black tea. Background technique [0002] Black tea belongs to the category of fully fermented tea and is one of the beverages that consumers like. Relevant scholars at home and abroad have shown that black tea leaves have many biologically active functions, and tea polyphenols and amino acids contained in black tea leaves are beneficial to the human body. But black tea leaves also contain caffeine, caffeine is a kind of stimulant that can stimulate the central nervous system of the human body and promote the excitement of the brain. Excessive amounts will cause side effects to people, including stimulating the central nervous system, affecting sleep, and increasing the prevalence of rheumatoid arthritis. rate etc. [0003] At present, there are mainly the following methods to reduce the content of caffeine: [0004] 1. H...

AI Technical Summary

Problems solved by technology

There are few studies on this method, and the results of existing studies show that the removal rate of caffeine is also low

[0006] 3. Supercritical CO2 extraction method, this method can effectively remove caffeine in tea, but the equipment is expensive, the process is complicated, the processing volume is small, the processing cost is high, and organic solvents will be added during the process, which will also cause the aroma of the finished tea to be lost serious