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:
Jul. 17, 2012
Filed:
Mar. 18, 2008
Gilbert Andreoletti, Urville-Nacqueville, FR;
Michel Belieres, Limoges, FR;
Pascal Nardoux, Panazol, FR;
Jean-paul Moulin, Bois D' Arcy, FR;
Anne Montaletang, Rilhac Rancon, FR;
Patrick Bourdet, Bethesda, MD (US);
Gilbert Andreoletti, Urville-Nacqueville, FR;
Michel Belieres, Limoges, FR;
Pascal Nardoux, Panazol, FR;
Jean-Paul Moulin, Bois D' Arcy, FR;
Anne Montaletang, Rilhac Rancon, FR;
Patrick Bourdet, Bethesda, MD (US);
Areva NC, Paris, FR;
Abstract
The invention relates to a process for producingTh from a natural thorium salt, which comprises in succession: a) the separation of the radium from the other radioelements present in this salt, by at least one coprecipitation of the radium by barium sulphate, this coprecipitation comprising: i) the addition of sulphuric acid and a barium salt to an aqueous solution of said natural thorium salt in order to form a barium-radium sulphate coprecipitate and ii) the separation of the coprecipitate from the medium in which it has formed; b) the extraction of the thorium 228 coming from the decay of radium 228 from the coprecipitate thus separated; and, optionally c) the purification and concentration of theTh thus extracted. Applications: manufacture of radiopharmaceutical products useful in nuclear medicine, in particular in radioimmunotherapy for the treatment of cancers and AIDS.