摘要:
Roasted coffee with an increased chlorogenic acid content of more than 2.8% by weight or instant coffee powder with an increased chlorogenic acid content of more than 8.5% by weight have a better compatibility. The increased chlorogenic acid content is achieved either by adding chlorogenic acid or by extracting raw coffee and adding the optionally concentrated extract to the roasted coffee.
摘要:
Chlorogenic acid can be separated and produced as free acid or as salts thereof from plant raw material extracts by means of gel permeation chromatography on cross-linked modified polysaccharides, especially on dextrans. To obtain the free acid, the aqueous extract must be adjusted to a pH in the range of about 2 to 2.8. By use of a column of sufficient length the isomeric 5-, 4- and 3-chlorogenic acid can also be separated by the process of the invention.
摘要:
A process for separating caffeine from an aqueous raw coffee extract by means of gel chromatography is described, in which simultaneously the chlorogenic acids can be separated if desired. The inventive process makes it possible to obtain in a simple manner decaffeinated coffee, optionally with a reduced chlorgenic acid content.