The invention relates to the technical field of
food processing, and particularly discloses a preparation method of a red date extract. The extract is prepared from red dates as a
raw material through pretreatment, enzymolysis,
solid-liquid separation,
aroma recovery, concentration, membrane integrated concentration and finished product blending, and a red date extract A and a red date extract B are prepared as cores. The preparation method comprises the following steps: soaking and
softening red dates, removing kernels, crushing and
grinding into pulp, adjusting the pH value of the pulp, carrying out enzymolysis and heating for
enzyme deactivation, carrying out
solid-liquid separation, respectively carrying out
aroma recovery and concentration on residues and filtrate, combining aromatic water, filtering through a
ceramic membrane, concentrating through a
reverse osmosis membrane, and finally mixing the two extracts to obtain a finished product. The red date extract can be used for
food flavor blending and tobacco
flavor blending, and is rich in
flavor, free of
organic solvent residues and complete in
nutrient component retention; the preparation method is easy and convenient to operate, low in equipment investment, low in
energy consumption,
environmentally friendly, capable of fully recycling
aroma substances of the red dates, capable of improving the extraction efficiency, suitable for industrial large-scale production and capable of effectively guaranteeing the product quality.