A process for the preparation of a concentrated extract of coffee, tea or substitutes therefor, which comprises the steps of (a) subjecting an extract to an ultra-filtration treatment using a membrane having a molecular weight exclusion point in the range 500 to 5000 Daltons, so as to obtain a retained fraction containing essentially soluble solids and an aromatic permeated fraction; (b) subjecting ultra-filtration permeated fraction from step (a) to a reverse osmosis treatment using a membrane which is capable of retaining at least 99% of NaCl; and (c) mixing the retained fraction from the reverse osmosis of step (b) and the retained fraction from the ultra-filtration of step (a) to give the desired concentrated extract. The extract may be subjected to steam distillation before step (a) and the aromas so obtained added to the final concentrated extract. e
申请公布号
DE3025095(C2)
申请公布日期
1989.08.31
申请号
DE19803025095
申请日期
1980.07.02
申请人
SOCIETE DES PRODUITS NESTLE S.A., VEVEY, CH
发明人
BUHLER, MARCEL, TOLOCHENAZ, CH;OLOFSSON, MATS, AASTORP, SE
