The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 30, 2001
Filed:
Apr. 14, 2000
E. Philip Horwitz, Naperville, IL (US);
John J. Hines, Newark, IL (US);
PG Research Foundation, Inc., Darien, IL (US);
Abstract
The invention relates to a process for separating and purifying multi-curie quantities,Y of sufficient chemical and radiochemical purity suitable for use in medical applications without a series of,Sr selective extraction chromatographic columns while minimizing loss of radioactive,Sr parent and waste stream. The process includes dissolving a nitrate salt of an original,Sr stock solution in H,O creating a strontium nitrate solution; acidifying the strontium nitrate solution containing,Y with concentrated nitric acid; evaporating the strontium nitrate solution; filtering or centrifuging strontium nitrate solution to separate crystalline,Sr nitrate salt from the solution; evaporating the remaining,Y enriched supernate to dryness; dissolving the remaining,Y enriched supernate in a strong acid; passing the solution through an yttrium selective extraction chromatographic column; rinsing the yttrium selective extraction chromatographic column with strong acid; and eluting yttrium from yttrium selective extraction column with strong acid.