DESORBING METHOD FOR URANIUM

摘要

PURPOSE:To obtain easily an uranium desorbent liquid having a high concn. with less extraneous ions by packing an amidoxime type chelate resin subjected to a contact treatment with an aq. acid soln. into a column and passing the aq. acid soln. therethrough thereby desorbing the uranium. CONSTITUTION:An adsorbent is subjected to the contact treatment with the aq. acid soln. at >=2pH and is then packed into the column to >=2m layer height and the aq. acid soln. is passed therein at a flow rate of <=9m/hr superficial linear velocity in the stage of desorbing the uranium from the amidoxime type chelate resin which adsorbs the uranium from the sea water by bringing the same into contact with the sea water. Then the high uranium of >=1,500-2,000ppm in the desorbent liquid is obtd. The amidoxime type chelate resin to be used is produced by bringing a polymer having an amidoxime group as a functional group into reaction with hydroxylamine. The amidoxime type chelate resin is formed preferably into the shape such as granular or spherical shape which is convenient to packing into the column. The grain size is preferably about 100mu-1mm.