FIELD: food industry.SUBSTANCE: invention relates to the biochemistry and the food industry. Method comprises the raw material provision, which is the whole legume seeds, whole sunflower seeds (Helianthus annuus seeds or fruits) or soy beans, and / or the Brassicaceae whole seeds / fruits, in particular, rapeseed, in the form of mixture of substances from whole seeds or from already (partially) defatted seeds, in particular, in the form of a filter-press precipitate. If the original product is not crushed, then crushing the substances mixture, during crushing disintegrating the husk. Dispersing the crushed mixture of substances with water at a ratio of 1:4-8 to obtain the free flowing mass and / or dispersion. Bringing the mass pH to the alkaline pH above 9.5. Adding to the mass the water-soluble organic solvent, which is alcohol, until the alcohol concentration of less than 30% is obtained, to separate the husk from the seeds / fruits endosperm. Separating the solid phase in the centrifuge. Bringing the mass pH to pH between 4.5 and 7.2. Separating the not containing the husk mass, on at least one decanter or separator, into plurality of phases, where one of these phases is the protein concentrate phase, which is dried by means of the drying mill with the powder formation. At that, the temperature during all process stages, other than pressing to produce the filter-press precipitate, is below 60°C.EFFECT: invention enables reduction in the product thermal decomposition, which eliminates the need for the product secondary purification, the resulting purified pure product has a suitable RAL color without further processing.23 cl, 5 dwgИзобретение относится к биохимии и пищевой промышленности. Способ включает предоставление исходного материала, представляющего собой цельные семена бобовых, цельные семена подсолнечника (семена или плоды Helianthus annuus) или соевые бобы, и/или цельные семена/плоды Brassicaceae, в частности плоды рапса, в виде смеси веществ из цельных
