Centrifuging

First we investigated what happens if we fill a cylinder with air, close it and rotate it. The results show that no matter which peripheral speed is used, it is not possibel to enrich the oxygen concentration from the previous 21% to more than 23.3%, and this is of no practical value. But, if we use the wanted material from one centrifuge as an input for a second centrifuge and so on (we form a cascade of centrifuges) it will, of course, enrich the oxygen in each step, and so was the technic in the very big plants for enrichment of uranhexaflouride used for atomic weapons and atomic power plants. But these technics are much too complicated for production in small scales. Therefore next we investigate the possibilities of using a countercurrent centrifuge where in principle the enriched gas is subjected to several centrifugations in the same centrifuge. The calculations show, that in this way it is possible to produce nearly 100% pure oxygen (polluted with some heavier molecules like argon). Our third step was to calculate the amount of oxygen produced per hour. Using a countercurrent centrifuge of the Zippe type, 100 cm high and 20 cm in diameter, it is or will be possible in the near future to produce 12 g per hour. It corresponds to a complete separation of 1 m3 atmospherical air in the period of 25 hours