wash liquid to said solution while continuing said ultrafiltration application_number US 50591274 A description the vegetable source i e sunflower or colza may be used in the form of seeds flower or meal although meal is preferred the source is suspended in an alkaline solution and the temperature adjusted to between 20 u00b0 50 u00b0 c most preferably about 40 u00b0 c the suspension may optionally contain sodium sulfrite or some other source of sulfur dioxide good results are attained with the use of 8 to to 12 times the amount of alkaline solution preferably 10 times the weight of the meal the alkalinity of the solution is adjusted to a ph of 8 to 12 and preferably 10 5 to 11 0 the suspension is then permitted to macerate for 20 to 60 minutes and most desirably about 30 minutes and the insoluble residue is separated by known means from the mixture to form a clarified alkaline solution the clarified alkaline solution is passed over a semipermeable membrane having a pore diameter in the range of 0 1 m u03bc and 30 m u03bc and preferably between 1 and 20 m u03bc at a temperature in the range of 2 u00b0 and 30 u00b0 c the pressure of the liquid entering the ultrafiltration module is in the range of 1 to 50 kg cm 2 and the velocity of the liquid at right angles to.