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Paramétrages

Paramétrages

1. WO1980000010 - METHODE DE SEPARATION ISOTOPIQUE

Note: Texte fondé sur des processus automatiques de reconnaissance optique de caractères. Seule la version PDF a une valeur juridique

1. A method for separating heavier from light
isotopes, comprising:
introducing a gaseous feedstock mixture containing
relatively light and relatively heavy isotopes under sufficient pressure and temperature into an elongated cylindrical vortex tube in a circumferential fashion so as to impart a swirling action of said mixture within said tube around the longitudinal axis thereof which separates said mixture into a warmer outer, radial portion and a cooler inner, radial portion;
drawing off said outer radial portion of said swirling mixture which comprises on the order of about five (5) to
ninety-five (95) percent of the inlet mass flow rate of said gaseous feedstock mixture adjacent the cylindrical wall of said tube through an outer opening spaced radially outwardly from the longitudinal axis of said tube;
drawing off the inner radial portion of said swirling mixture which comprises on the order of about ninety-five (95) to five (5) percent of the inlet mass flow rate of the gaseous feedstock mixture through an axial outlet located approximately along the longitudinal axis of said tube;
said inner radial portion exiting from said axial
outlet being enriched with relatively heavy isotopes and said outer radial portion exiting from said outer opening being
enriched in relatively light isotopes.

2. A method according to Claim 1 comrpising the step of restricting the absolute pressure values imposed upon the feedstock mixture during said introducing step to the range of 40 to 400 torr.

3. A method according to Claim 1 comprising the step of restricting the absolute pressure value imposed upon the two portions of the feedstock mixture during said drawing off steps to the range of 0.1 to 10 torr.

4. A method according to Claim 1 comprising the step of operating the vortex tube below standard atmospheric pressure to increase the mean free path between collisions of the feedstock molecules to thereby enhance separation of the isotopes.

5. A method according to Claim 1 comprising the step of controlling the inlet temperature of the feedstock mixture to prevent other than negligible condensation and freezing.

6. A method according to Claim 1 wherein said feedstock mixture comprises a carrier gas.

7. A method according to Claim 1 wherein said feedstock mixture comprises more than two isotopes.

8. A method for separating heavier from light isotopes, comprising:
introducing a gaseous feedstock mixture containing
relatively light and relatively heavy isotopes under sufficient pressure and temperature into an elongated cylindrical vortex tube in a circumferential fashion so as to impart a swirling action of said mixture within said tube around the longitudinal axis thereof which separates said mixture into a warmer outer, radial portion and a cooler inner, radial portion;
electromagnetically exciting the vibrational mode of isotopic molecules exclusive of the one of the mixture having the largest number of molecules to enhance separation;
drawing off said outer radial portion of said swirling mixture adjacent the cylindrical walls of said tube through an outer opening spaced radially outwardly from the longitudinal axis of said tube;
drawing off the inner radial portion of said swirling mixture through an axial outlet located approximately along the longitudinal axis of said tube;
said inner radial portion exiting from said axial
outlet being enriched with relatively heavy isotopes and
said outer radial portion exiting from said outer opening being enriched in relatively light isotopes.

9. A method according to Claim 8 where said electromagnetically exciting step comprises directing an electromagnetic beam substantially along the axis of the vortex tube and tuning the beam to selectively excite the vibrational mode of said isotopic molecules.

10. A method according to Claim 9 wherein the wavelength of the beam is within the range of 0.1 to 20 micrometers.

11. A method according to Claim 9 wherein the beam is a continuous wave type.

12. A method according to Claim 9 wherein the beam is pulsed.

13. A method according to Claim 9 wherein the unfocused power of the beam is a range of greater than zero up to 25 watts per square centimeter.

14. A method according to Claim 9 wherein the beam is caused to pass through materials within the vortex tube which are essentially transparent to the beam.

15. A method according to Claim 9 further comprising the step of cooling at least part of the vortex tube during excitation to remove excess heat generated.

16. A method for separating heavier from light isotopes, comprising:
Introducing a gaseous feedstock mixture containing relatively light and relatively heavy isotopes under sufficient pressure and temperature, into a plurality of axially aligned elongated cylindrical vortex tubes, in a circumferential fashion so as to impart a swirling action of said mixture within each said tube around the longitudinal axis thereof which separates said mixture into a warmer outer, radial portion and a cooler inner, radial portion;
electromagnetically exciting from a common source the vibrational mode of isotopic molecules within each vortex tube exclusive of the one of the mixture in each tube having the largest number of molecules to enhance separation;
drawing off in each tube said outer radial portion of said swirling mixture adjacent the cylindrical walls of said tube through an outer opening spaced radially outwardly from the longitudinal axis of said tube;
drawing off in each tube the inner radial portion of said swirling mixture through an axial outlet location
approximately along the longitudinal axis of the tube;
said inner radial portion exiting from said axial outlet of each tube being enriched with relatively heavy isotopes and said outer radial portion exiting from said outer opening being enriched in relatively light isotopes.