CN1318308A

CN1318308A - Instand red tea powder and its production process

Info

Publication number: CN1318308A
Application number: CN 01118449
Authority: CN
Inventors: 罗龙新; 钱晓军; 颜泽松
Original assignee: HUACHENG FOOD CO Ltd GUANGDONG
Current assignee: Shenzhen Shenbao Huacheng Science & Technology Co., Ltd.
Priority date: 2001-05-30
Filing date: 2001-05-30
Publication date: 2001-10-24
Anticipated expiration: 2021-05-30
Also published as: CN1170481C

Abstract

The instant red tea powder producing process of superfiltering enzymolyzed and settled tea includes soaking red tea at 80-90 deg.c, quick-cooling the tea extracting liquid to room temperature, straining, filtering, mixing with composite enzyme comprising pectinase, proteinase, alpha-amylase to enzymolyze and settle tea extracting liquid, superfiltering, membrane or evaporating concentration to solid matter content more than 20 %, and spray drying or freeze drying. The instant red tea powder may be dissolved into clear and transparent tea without cold turbidness.

Description

A kind of instant black tea powder and manufacture method thereof

What the present invention relates to is a kind of novel instant black tea powder, especially adopts to add and carries out the instant black tea powder that ultrafiltration is produced after complex enzyme will be clarified tea extract.

Common filtering technique is all adopted in the production of traditional tea juice concentrating, as plate compression, smart filter etc.Adopt the advantage that common filtering technique has simply, cost is low, but the muddy degree height of product, viscosity is big, and after the dilution, millet paste is owed clear, and the pectin in the tea, albumen, starch easily form muddiness and precipitation.Japan Patent JP91-80457 discloses the method that a kind of tea extract directly adopts the RO film to concentrate in the prior art, and this method is to adopt PCIZF99 type RO film direct method of concentrated tea juice under 35 ℃, 40 Pasteur's pressure.Though can obtain to keep the tea juice concentrating of preferable color in this way, the coarse filtration muddiness of tea juice also has a spot of precipitation or insoluble shape thing.Japan Patent JP92-61613 discloses and has added caseinate (addition is the 10-40% of tea juice solid content) handle tea juice in tea extract, centrifugally then goes to mix, again the technology that concentrates through the RO film.Though this method can obtain the tea juice of certain clarity, owing to need to add relatively large caseinate, therefore network and removed active ingredient in a large amount of tea juice correspondingly causes tea juice flavour to reduce.JP145347 discloses a kind of employing molecular cut off 2500 dalton UF film pre-concentrations, and the liquid that sees through of UF concentrates through polyamide RO film again, then two kinds of manufacturing process that inspissated juice merges.This method effect of UF film in fact is concentrated, so tea juice still is to present muddy state.JP93-51260 discloses a kind of tea juice concentrating that adopts tannase to separate with film to combine or the manufacturing process of instant tea powder.This technology is because the employing molecular cut off is 5000 milipore filter, thereby the macromolecular compound in the tea juice very easily stops up the UF film, thereby propose at tea juice through handling tea juice (enzyme dosage 0.5-500 enzyme unit/restrain dried tea) with tannase in advance before the UF and then concentrating, though can make tea juice concentrating or the instant tea powder that does not have muddiness with this technology through the RO film.But owing to adopt molecular cut off 5000 daltonian UF films, still can hold back the active ingredient in a large amount of tea juice, cause tea juice flavour flat.The patent disclosure of Chinese patent notification number 1118659 a kind of enzyme defecation method of extract of tea, this technology discloses a kind of production method of the extract of tea that its muddy degree can greatly reduce when refrigeration is stored.This method comprises the mixture of cultivating oxidizing ferment, tannase and extract of tea, isolates insoluble solid then from extract of tea.Extract of tea is preferably a kind of inspissated juice, subsequently this inspissated juice dilution is obtained instant beverage.Extract of tea or can reduce its muddy degree significantly when the refrigeration by the tea beverage of this extract preparation.But because extract of tea do not pass through ultrafiltration, the pectin in the tea, albumen, starch is undecomposed holds back, and still easily forms muddy and precipitation.

The objective of the invention is to adopt and add complex enzyme and will clarify and carry out the production that ultrafiltration produces behind the tea extract and have good clarity, and in the tea beverage of manufacturing haze-free substantially, non-setting a kind of instant tea powder.

Technical scheme of the present invention is as follows:

Soaked 20 minutes down at 80～90 ℃ in 1: 15～20 tea ratio with black tea, resulting tea extract is cooled to room temperature immediately, after coarse filtration, smart filter, add 0.01% according to 2: 1: 3 pectases, protease, AMS at the complex enzyme of forming enzymolysis 2～3 hours under 40 ℃, the condition of pH value 5.5.Tea extract is carried out enzymolysis clarification, use 10-20 ten thousand dalton's polypropylene hollow fiber ultrafiltration membrance filters subsequently, adopt film to concentrate or evaporation and concentration is concentrated into enzymolysis liquid and is higher than 20% solid content.Carry out spray-drying or freeze drying then, can obtain dissolving back clarification, transparency height, the turbid instant black tea powder of cream down not substantially.Wherein, black tea can be selected from local tea varieties such as the keemun, Yunnan black tea of black tea class, and the grade of tealeaves is not had specific restriction.

Below with example the present invention is specifically described.Be to be understood that following examples just to explanation technical scheme of the present invention, rather than the present invention is construed as limiting.

Example 1

In extractor, drop into the red fannings 100kg of large leaf, add 90 ℃ of hot water 2000kg, soak 20 minutes, obtain black tea coarse filtration liquid through the cooling coarse filtration.Black tea coarse filtration liquid further is cooled to 25 ± 2 ℃ with chilled water, after 200 eye mesh screens filter,, obtains the black tea filtrate of clarification with the essence filter post filtration of 1 μ m.Add 0.01% according to 2: 1: 3 pectases, protease, AMS at the complex enzyme of forming enzymolysis 3 hours under 40 ℃, the condition of pH value 5.5.Tea extract is carried out the enzymolysis clarification, use 150,000 dalton's polypropylene hollow fiber ultrafiltration membrance filters subsequently, the employing film concentrates or evaporation and concentration is concentrated into enzymolysis liquid 25% solid content.Carry out that spray-drying or freeze drying are promptly clarified, transparency height, the instant black tea powder of cream down not substantially.Get instant black tea powder and add trial-production icy bleak tea beverage in 0.15% ratio, this beverage is haze-free at normal temperatures, and storing only had the minute quantity precipitation to produce in 6 months.

Reference examples 1

Get tea extract that example 1 do not add complex enzyme with 150,000 dalton's polypropylene hollow fiber ultrafiltration membrance filters, adopt film to concentrate or evaporation and concentration is concentrated into enzymolysis liquid 25% solid content.Carry out spray-drying or freeze drying and promptly obtain instant black tea powder.Add trial-production icy bleak tea beverage in 0.15% ratio, become turbid immediately, promptly occur precipitation after 1 week, more flocculent deposit deposits yields was arranged after 6 months.

The instant black tea powder of producing with the inventive method has resistance to settling preferably, adds preparation icy bleak tea beverage in 0.15% ratio, does not become turbid, and only has the minute quantity precipitation to produce in 6 months shelf time, is fit to very much the acid tea beverage of preparation.Clarification, transparency height, the tea beverage of cream down not substantially will can be arrived after the instant black tea powder dissolving.

Claims

1. the manufacture method of an instant black tea powder, the complex enzyme that it is characterized in that adding pectase, protease and three kinds of enzymes of α _ amylase in the black tea extract carries out the enzymolysis clarification to tea extract, then through ultrafiltration, carry out spray-drying after concentrating or freeze drying obtains a kind of instant black tea powder.

2. method as claimed in claim 1, wherein said black tea extract are to be 1: 15～20 tea by soaking 20 minutes down at 80～90 ℃ with ratio, and resulting tea extract is cooled to room temperature immediately, makes through coarse filtration, smart filter.

3. method as claimed in claim 1 adopts film to concentrate after the tea extract ultrafiltration behind the wherein said enzymolysis or evaporation and concentration reaches and carries out spray-drying or freeze drying again after being higher than 20% solid content.

4. method as claimed in claim 1, the complex enzyme of wherein said pectase, protease and three kinds of enzymes of α _ amylase was formed according to 2: 1: 3.

5. method as claimed in claim 1, the addition of wherein said complex enzyme are 0.01% of black tea extract, and the condition of enzymolysis is that 40 ℃, pH value 5.5, time are 3 hours.

6. method as claimed in claim 1, wherein said ultrafiltration are black tea enzymolysis liquid polypropylene hollow fiber ultrafiltration membrance filters, and used retaining molecular weight is 10-20 ten thousand dalton.

7. method as claimed in claim 1, the black tea of wherein said employing can be selected from keemun, the Yunnan black tea of black tea class.

8. a kind of instant black tea powder of producing as any one described method among the claim 1-7.