|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||426/52 ; 426/597 ; 426/422|
|발명자 / 주소|
|출원인 / 주소|
|인용정보||피인용 횟수 : 9 인용 특허 : 0|
In a process of preparing a tea extract, the extract is adjusted to 20°-80°C., treated with tannase at pH=4-7 and then subjected to ultrafiltration at 2°-90°C. using a membrane with an average molecular weight exclusion point of at least 5000 Daltons (preferably at least 30,000 Daltons). The extract may finally be subjected to an additional filtration, preferably microfiltration. Also an instant a cold-water soluble tea powder or granulate is claimed.
In an improved process of preparing a final tea extract, comprising the steps of: (a) preparing a tea extract, (b) adjusting the temperature of the extract to a value of from 20°C. to 80°C., (c) treating the extract with tannase while maintaining said extract temperature at 20°C. to 80°C. for a time sufficient to solubilize a substantial portion of the tea cream therein at a pH value between 4.0 and 7.0; wherein the improvement comprises (d) subjecting the treated extract to an ultrafiltration treatment at a temperature of from 2°C. to 90°C. using a memb...