| 摘要 |
<p>1355095 Separating radio-isotopes UNION CARBIDE CORP 16 Aug 1971 [17 Aug 1970] 38397/71 Heading G6R Molybdenum is recovered from an acidic liquid having a pH below 5 by contacting the liquid with an adsorbent comprising activated carbon coated with silver. The adsorbent may be a mixture of coated and uncoated carbon. The process may be used for the separation from an aqueous solution of irradiated uranium of Mo 99 for use in a generator supplying Tc 99 m. The acid present in the solution may be H 2 SO 4 , a mixture of H 2 SO 4 and H 2 SO 3 , HCl, HNO 3 , acetic acid or oxalic acid. Molybdenum is eluted from the adsorbent with an alkaline solution, e.g. a solution of NaOH KOH, NH 4 OH, Na 2 CO 3 , or morpholine. To obtain Mo 99 of medical purity, the eluate may be acidified and readsorbed or may be passed through a column of alumina or zirconia.</p> |
