TRATAMIENTO DE UN MATERIAL PROTEICO

Un método de separación de insulina bovina desde un material proteínico líquido libre de grasa proveniente de leche de vaca, caracterizado por contacto del material proteínico líquido libre de grasa proveniente de leche de vaca, material que tiene un pH 2 a 8, a una temperatura de menos de 65°C, con una resina de adsorción microporosa a base de estireno o a base de compuesto acrílico, donde la relación de pesos del material proteínico que se va a tratar a resina de adsorción es como máximo 100:1, y combinación con el citado tratamiento de resina de al menos un tratamiento de ultra- y dia-filtración del material proteínoso, y si es necesario, concentración del material líquido así obtenido hasta un concentrado de proteína y secado opcional hasta polvo. The invention relates to a method of removing bovine insulin from a liquid fat-free proteinous material originating from cow's milk, wherein the liquid fat-free proteinous material originating from cow's milk, the material having a pH of 2 to 8, at a temperature below 65° C., is contacted with an adsorption resin, whereby the weight ratio of the proteinous material to be treated to the adsorption resin is at most 100:1, optionally combining with said resin treatment at least one ultra and dia-filtration treatment of the proteinous material, and, if necessary, the liquid material so obtained is concentrated into a protein concentrate and optionally dried to powder. The invention further relates to a substantially bovine insulin-free proteinous material so obtained, and to its use as the protein part or raw material in the preparation of substantially bovine insulin-free infant formulae or other special nutritive preparations or consumption milk, other milk drinks or other milk preparations, or as a raw material therein.