Recovery of Mo-98 Enriched Stable Isotope from Graphite Collector of EMIS and its Chemical Purification

Garousi, J; Noorkojouri, H; Sarabadani, P; Zeinali, B

Recovery of Mo-98 Enriched Stable Isotope from Graphite Collector of EMIS and its Chemical Purification

Document Type : Research Paper

Authors

J Garousi

H Noorkojouri

P Sarabadani

B Zeinali

Abstract

Recovery and chemical purification of Mo-98 from graphite collector which was separated by EMIS were made for the first time in Iran. In this research work, metallic Mo-98 isotope deposited on the internal surface of graphite was separated from pocket by scraping. Then, carbon was removed from the mixture of molybdenum and graphite by burning at 850^ºC in oxygen atmosphere in the form of CO₂ and molybdenum was converted to oxide form (MoO₃). Molybdenum tri-oxide was dissolved in hot and concentrated ammonia solution. In alkaline condition, the major impurity of Fe as hydroxide form was precipitated. In the next step, after acidifying the solution by sulfuric acid, α-benzoin oxime was added, and molybdenum organometalic complex was formed. The complex was filtrated, dried and ignited at 500^ºC in electrical furnace. Finally, ⁹⁸MoO₃ was obtained. The crystalline structure of MoO₃ was confirmed by X-ray Diffraction (XRD) and its chemical purity of 97.44% was determined using the ICP-emission spectrometer.

Highlights

1. ا. علی‌پور، ”مباحثی از رادیو فارماسی دانشگاه اصفهان،“ 237، (1368).

2. Boyd Weaver, “Electromagnetic separation of isotopes,” Chemical Refinement Procedures in Oak Ridge National Laboratory Report, Aug. 8, (1955).

3. F. Albert Cotton, Geoffrey Wilkinson, Paul L. Gaus.,“ Basic Inorganic Chemistry,” Wiley, 3rd Edition, 529, (1995).

4. Arthur Israel Vogel, “Vogel's textbook of quantitative inorganic analysis: including elementary instrumental analysis,” Longman, 5th edition, 611, (1996).

5. N.J. Anderson, L.O. Kolarik, E.A. Swinton, D.E. Weiss, “Colour and turbidity removal with reusable magnetic particles-III immobilized metal hydroxide gels,” 16(8), 1327-1334 (1982).

6. D.Wu, S. Landsberger, B.A. Buchholz, G.F. Vandegrift, “Processing of Leu Target for Mo-99 production testing and modification of the cintichem process,” 1995 International Meeting on Reduced Enrichment for Research and Test Reactor, paris. France sep. 18-21, (1994).

Keywords

Recovery

Chemical Purification

Mo-98

Graphite Collector

α-Benzoin Oxime

1. ا. علی‌پور، ”مباحثی از رادیو فارماسی دانشگاه اصفهان،“ 237، (1368).

2. Boyd Weaver, “Electromagnetic separation of isotopes,” Chemical Refinement Procedures in Oak Ridge National Laboratory Report, Aug. 8, (1955).

3. F. Albert Cotton, Geoffrey Wilkinson, Paul L. Gaus.,“ Basic Inorganic Chemistry,” Wiley, 3rd Edition, 529, (1995).

4. Arthur Israel Vogel, “Vogel's textbook of quantitative inorganic analysis: including elementary instrumental analysis,” Longman, 5th edition, 611, (1996).

5. N.J. Anderson, L.O. Kolarik, E.A. Swinton, D.E. Weiss, “Colour and turbidity removal with reusable magnetic particles-III immobilized metal hydroxide gels,” 16(8), 1327-1334 (1982).

6. D.Wu, S. Landsberger, B.A. Buchholz, G.F. Vandegrift, “Processing of Leu Target for Mo-99 production testing and modification of the cintichem process,” 1995 International Meeting on Reduced Enrichment for Research and Test Reactor, paris. France sep. 18-21, (1994).