Induced nuclear reactions: processes – systems – and elements – Nuclear transmutation – By neutron bombardment
Reexamination Certificate
2007-09-04
2007-09-04
Colbert, Ella (Department: 3694)
Induced nuclear reactions: processes, systems, and elements
Nuclear transmutation
By neutron bombardment
C202S237000, C423S578100
Reexamination Certificate
active
10163723
ABSTRACT:
A method for distillation of sulfur for preparing radioactive phosphorous nuclide includes the steps of: charging powdered sulfur into a target tube designed to have an upper and a bottom neck; degassing the target tube to form a vacuum therein, followed by heating the upper neck to seal the target tube; irradiating neutrons into the sealed target tube to produce radioactive phosphorous nuclide; heating the distillation zone to distill the remaining unreacted sulfur; and cleaving the target tube at the bottom neck to separate the distillation and the cooling zone from each other, the separated zones containing the radioactive phosphorous nuclide and the unreacted sulfur, respectively, whereby the radioactive phosphorous nuclide of high purity can be prepared while the sulfur can be recovered at high efficiency.
REFERENCES:
patent: 2206634 (1940-07-01), Edoardo et al.
patent: 3023835 (1962-03-01), Brashear
patent: 3362795 (1968-01-01), Weisbeck
patent: 3833469 (1974-09-01), Robson
patent: 4017583 (1977-04-01), Motojima et al.
patent: 4123498 (1978-10-01), Rosenbaum et al.
patent: 4287165 (1981-09-01), Rupp et al.
patent: 4374706 (1983-02-01), Molla
patent: 4483746 (1984-11-01), Rosenhouse et al.
patent: 765489 (1957-01-01), None
patent: 1015285 (1965-12-01), None
Sulfur, avaible online @ http://www.scescape.net/˜woods/elements/sulfur.html., accessed Jun. 16, 2005.
Phosporus, available onliune @http://www.scescape.net/˜woods/elements/phosphorus.html#top, accessed Jun. 16, 2005.
Preparation of Carrier Free Phosphorus by Neutron Irradiation, Yeh et al., Ho Tzu K'o Hsueh vol. 3, No. 4, Sep. 1962.
Preparation of Phosphorus-33 by irradiation of enriched sulfur-33 in highly thermalized flux, R.E.Lewis et al., ORNL-4051, Jan. 1967.
Phosphorus-32, ORNL-3633, Jun. 1964.
Apparatus for large scale production of phosphorus-32, Arrol, W.J., Nucleonics vol 11 #5 pp. 26-28 TK9001 N8, May 1953.
Rengan et al., Ultrafast Chemical Separations (1993), NAS-NS-3118, available @ http://darwin.nap.edu/books/NI000150/html, last accessed Feb. 27, 2006.
Phosphorus PentaSulfide, available @ http://www.chemicalland21.com/arokorhi/industrialchem/inorganic/PHOSPHORUS%20PENTASULPHIDE.htm, last accessed Feb. 27, 2006.
Phosphorus Pentoxide, MSDS, available @ http://www.jtbaker.com/msds/englishhtml/p4116.htm, last accessed Feb. 27, 2006.
Samsahl, K., Atompraxis 4, 14, 1958, pp. 14-17.
Razbash: A. A. et al., Winning 32P in the BR-10 Reactor, pp. 333-335, Atomnaya Ehnergiya 70(4), 260, 1991.
Gharemano, A. R. et al. Preparation of Ortho-Phosphoric Acid /H3 32P O4/ For Application in Medicine and Agriculture in Iran, pp. 49-53, Radiochemical and Radioanalytical Letters Hungary 58(1), 49, 1983.
Parker, C.L. “Recent Inventions” Jrn of Ind. Eng. Chem. Aug. 1913.
Ye. A. Karelin et al., Radionuclide Production Using a Fast Flux Reactor, Applied Radiation and Isotopes, vol. 53, pp. 825-827, (2000).
Han Hyon Soo
Park Ul Jae
Shin Hyeon Young
Yoo Kwon Mo
Bachman & LaPointe P.C.
Colbert Ella
Greene, Jr. Daniel L
Korea Atomic Energy Research Institute
LandOfFree
Method for distillation of sulfur for the preparing... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method for distillation of sulfur for the preparing..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for distillation of sulfur for the preparing... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3733017