Fremgangsmåte ved konsentrasjon og rensing av ikke-ioniske, vannopplöselige joderte kontrastökende organiske forbindelser fra sine vandige opplösninger, samt totrinns tangentiell filteranordning for anvendelse ved fremgangsmåten

摘要

A process aimed at concentrating and purifying raw aqueous solutions of water-soluble non-ionic organic compounds, preferably those which are useful as contrast enhancing agents in diagnostic procedures, such as for example X-ray, NMR and ultrasound diagnosis, through the use of techniques of tangential filtration on membranes is disclosed. This process also allows the recovery of valuable reactants in excess and of reaction solvents, if any, and it is particularly useful for purifying expensive non-ionic iodinated compounds, which now have been widely used in X-ray imaging.