Chemistry: electrical and wave energy – Processes and products – Processes of treating materials by wave energy
Reexamination Certificate
2001-06-01
2003-05-06
Wong, Edna (Department: 1741)
Chemistry: electrical and wave energy
Processes and products
Processes of treating materials by wave energy
C204S157220, C250S283000
Reexamination Certificate
active
06559402
ABSTRACT:
FIELD OF THE INVENTION
The invention is related to the technology of electromagnetic separation of chemical elements, in particular, to electromagnetic separation of low natural concentration isotopes. The invention can be most efficiently used for industrial electromagnetic separating stable isotopes of low natural concentration.
BACKGROUND OF THE INVENTION
A process is known for separating isotopes of chemical elements applied for industrial electromagnetic separation of isotopes (N. A. Kascheev, V. A. Dergatchev “Electromagnetic separating isotopes and isotopic analysis”. M. “Energoatomizdat”, 1989, pp. 68, 86-109). The process for separating isotopes of chemical elements described in this known art reference comprises the following. A working substance of the element is loaded in a crucible of the source, and is heated up to forming vapors of the working substance. The vapors of the working substance come to a gas-discharge chamber of the source, where they are ionized under action of electron emission from a hot cathode. The ions are withdrawn from the gas-discharge chamber, and shaped into an ion beam by electrodes of an ion-optical system. During the path through an evacuated separating chamber, the ion beams of isotopes of chemical elements are separated in a magnetostatic field depending on mass of isotopes, are focused by this field and are caught by the relevant boxes of the receiver. The isotopes are then extracted from the receiver boxes by electrochemical etching of the internal surface of the receiver.
A process for enrichment of isotopes is known comprising accumulation of isotopes in pockets of the receiver of the magnetic separator and extraction of the accumulated enriched substance, wherein the internal surfaces of the receiver pockets are cleaned from the beam material before extraction of the enriched substance, and extraction of the enriched substance, is performed by deep chemical etching of the pockets surface with subsequent extraction of the isotope from the etching products. (RU 1717197 of Jan. 20, 1988, by Datsko N.J. et al.).
FIG. 2
depicts a device as disclosed in RU 1717197 that is used to separate ions in accordance with the prior art. As seen in this figure, the separation chamber
21
includes an ion source
22
of a magnetic separator which creates ion beams
23
that are received in pockets
24
of a receiver
25
.
SUMMARY OF THE INVENTION
The present invention provides a process for obtaining a higher enrichment level of enrichment of low natural concentration isotopes.
The claimed process for separating stable low natural concentration isotopes in an electromagnetic separator with a ion source comprises arranging a working substance in an ion source crucible, heating the working substance up to vapor forming, ionizating the vapors in a gas-discharge chamber of the source under action of hot cathode electron emission, forming an ion beam by electrodes of ion-optical system, separating and focusing the ion beams of isotopes in a magnetic field and catching the ions in boxes of the receiver, exposing the boxes of the receiver to X-ray spectral analysis to identify those areas having heightened content of isotope enriched substance, removing the isotope enriched substance from these areas, and separately treating the remaining areas of the surface of the receiver's boxes.
REFERENCES:
patent: 4124801 (1978-11-01), Cook et al.
patent: 4394579 (1983-07-01), Schwrizke
patent: 5162699 (1992-11-01), Tokoro et al.
patent: 5443702 (1995-08-01), Haynam et al.
patent: 5865984 (1999-02-01), Corbin, Jr. et al.
patent: 6259763 (2001-07-01), Bitter et al.
Eng. Abstract—N.I. Datsko et al.,Nevinnomyssky Republican Electromechanical Factory, Russian Application No. 4367725/63, Filed Jan. 20, 1988, Russian Publication No. 1717197,Method for Enrichment of Isotopes.
Mockba, 1989 pp. 68, and 86-110; with English Translation, N.A. Kascheev et al.,Moscow Energoatomizdat1989,Electromagnetic Separation of Isotopes and Isotopic Analysis, pp. 11-18 Month Unavailable.
Konoplina Luiza Yakovlevna
Monastyrev Jury Alexandrovich
Polyakov Leonid Alexeevich
Tatarinov Alexei Nikolaevich
Gosudarstvennoe Uhitarnoe Predpriyatie
Pennie & Edmonds LLP
Wong Edna
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