Abstract: The invention relates to a process for producing a sunflower protein isolate, said process comprising the following steps: (a) providing a sunflower seed press cake, preferably a sunflower seed cold press cake; (b) mixing said sunflower seed press cake with an aqueous NaCI solution at a pH ranging from 3 to 4.5, in order to solubilize proteins present in said sunflower seed press cake and to thus obtain a solubilised protein solution, wherein said aqueous NaCI solution has a NaCI concentration ranging from 0.2 to 0.6 mol·L?1; (c) separating said solubilised protein solution from solids therein; (d) subjecting said solubilised protein solution obtained in step c) to one or several membrane filtration(s) to obtain a protein isolate, and optionally drying said protein isolate to obtain a dry sunflower protein isolate. The invention also relates to a sunflower protein isolate and its use and product which incorporate.

Abstract: A process for preparing a sunflower seed protein isolate and a protein isolate which is obtainable by such process. The process comprises the following steps: mixing a defatted seed meal with an aqueous NaCl solution at a basic pH; separating said solubilised protein solution from solids; diafiltering said solubilised protein solution through an ultrafiltration membrane system using an aqueous NaCl diafiltration NaCl solution and at least 2 diavolumes of said aqueous NaCl diafiltration solution, diafiltering said NaCl-diafiltered protein; concentrating said purified protein solution; and drying said purified protein concentrate to obtain a protein isolate.