Patent ID: 11865131
Assignee: DEUTSCHES INSTITUT FÜR LEBENSMITTELTECHNIK E.V.
Field: Pharmaceuticals (Chemistry)
Classification: CPC A  B | IPC A

Claim 0:
1. A process for producing an extract powder containing 60 to 90 wt.-% anthocyanins, 10 to 30 wt.-% L-arginine, and a salt content of at most 5 wt.-%, the process comprising the steps of
a. dissolving a fruit material containing anthocyanins in a solvent to produce an extract solution,
b. separating undissolved ingredients from the extract solution to produce a filtrate,
c. adsorbing the filtrate to a cation exchanger,
d. washing the cation exchanger with a first wash solution,
e. eluting the anthocyanins from the cation exchanger with a first elution solution to produce an eluate containing anthocyanins,
f. acidifying the eluate by adding acid to produce an acidified eluate,
g. drying the acidified eluate to produce the extract powder,
wherein the first elution solution consisting of L-arginine in aqueous alcoholic solution, wherein the first elution solution has a pH value of 4.5 and comprises L-arginine at a concentration of at least 5 mM up to 1000 mM, and wherein the first elution solution consists of an aqueous solution of L-arginine and primary alcohol mixed in equal volume proportions.