초록 ▼

A process for the counter-current extraction of soluble coffee solids. Soluble coffee solids are extracted from roast and ground coffee in a first extraction stage using a primary extraction liquid at a temperature of 80.degree. C. to 160.degree. C. Then soluble coffee solids are extracted from the

A process for the counter-current extraction of soluble coffee solids. Soluble coffee solids are extracted from roast and ground coffee in a first extraction stage using a primary extraction liquid at a temperature of 80.degree. C. to 160.degree. C. Then soluble coffee solids are extracted from the partially extracted grounds in a second extraction stage using a secondary extraction liquid at a temperature of 160.degree. C. to 190.degree. C., the coffee grounds having at least 25% by weight of soluble coffee solids extracted from them. The coffee grounds obtained from the second extraction stage are drained and thermally hydrolyzed in a hydrolysis stage at a temperature of 160.degree. C. to 220.degree. C. for 1 to 15 minutes. Soluble coffee solids are extracted from the hydrolyzed coffee grounds in a third extraction stage using a tertiary extraction liquid at a temperature of 170.degree. C. to 195.degree. C. to provide extracted coffee grounds and a hydrolyzed coffee extract.

대표청구항 ▼

[ We claim:] [1.] A process for counter current extraction of soluble coffee solids from coffee grounds, the process comprising:extracting soluble coffee solids from fresh grounds in a first extraction stage using a primary extraction liquid at a temperature of about 80.degree. C. to about 160.degre

[ We claim:] [1.] A process for counter current extraction of soluble coffee solids from coffee grounds, the process comprising:extracting soluble coffee solids from fresh grounds in a first extraction stage using a primary extraction liquid at a temperature of about 80.degree. C. to about 160.degree. C. to provide a primary coffee extract and partially extracted grounds;extracting soluble coffee solids from the partially extracted grounds in a second extraction stage using a secondary extraction liquid at a temperature of about 160.degree. C. to about 190.degree. C. to provide a secondary coffee extract and coffee grounds, the coffee grounds having at least about 25% by weight of soluble coffee solids extracted from them based on the weight of dry roast and ground coffee, the secondary coffee extract being collected or being used as the primary extraction liquid;draining liquid from the coffee grounds obtained from the second extraction stage and thermally hydrolyzing the coffee grounds using steam in a hydrolysis stage at a temperature of about 160.degree. C. to about 220.degree. C. for about 1 to about 15 minutes to provide hydrolyzed coffee grounds; andextracting soluble coffee solids from the hydrolyzed coffee grounds in a third extraction stage using a tertiary extraction liquid at a temperature of about 170.degree. C. to about 195.degree. C. to provide extracted coffee grounds and a hydrolyzed coffee extract, the hydrolyzed coffee extract being collected or being used as the primary or secondary extraction liquid.