To produce a red cabbage pigment, free from nasty smell, forming no sedimentation when added to a drink, etc., and further having a clear hue by carrying out an adsorption treatment of an extract of a pigment from a red cabbage with a specific resin, washing the resin with water, extracting the pigment from the resin with a solvent, removing impurities in the extract by using a specific material and carrying out a steam distillation of the extract after removing the impurities.
An adsorption treatment of an extract of a red cabbage pigment is carried out with a nonpolar and porous resin (e.g. a styrene-based resin or an acrylic acid-based resin) and the resin adsorbing the pigment is washed by water. The adsorbed pigment is eluted by a hydrophilic organic solvent such as ethanol, methanol or acetone and the elute is condensed. The objective red cabbage pigment is obtained by removing a trace of remaining impurities from the condensed elute by an insoluble mineral material such as a zeolite, a pearlite or a kaolin and further removing a volatile material by carrying out a steam distillation of the purified elute.
MANO SATORU
UEDA TETSUO
SHIINA RYUJIRO
MIYAZAWA KYUSHICHI
SHIKAMITSU SEIBUTSU KAGAKU KEN
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