METHOD OF PREPARING GRAPES FOR WINE PRODUCTION Russian patent published in 2025 - IPC C12G1/00 A23B7/24 A23B7/00 

FIELD: preparation of wine.

SUBSTANCE: invention relates to wine industry. Disclosed is a method of preparing grapes for wine production, involving partial dehydration and self-freezing during vacuum drying, which involves packing grapes in a perforated package and placement on heated shelves in a vacuum chamber with a desublimator, characterized by that vacuum drying of grapes 4 is carried out in the following modes: temperature of shelves from 0 °C to plus 35 °C, pressure in the vacuum chamber is from 10 to 30 mm Hg, at the first stage, the vacuum drying process is carried out until the intermediate moisture content in the grapes reaches values from 50% to 70%, then, at the second stage, pressure in the vacuum chamber is reduced to values of 1.5–2.25 mm Hg, and the product self-freezing process begins, and after complete freezing and grapes reaching temperatures of minus 8 °C to minus 13 °C. Vacuum drying process is completed and pressure in the chamber is brought to atmospheric pressure.

EFFECT: invention enables to obtain raw materials for production of wines with increased concentration of sugars and all native biochemical compounds.

2 cl, 3 ex