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Concentrating hydrogen peroxide
(Bill Bogen) :
It seems that sources for concentrated hydrogen peroxide are drying up, perhaps due to liability concerns. But there also seem to be mechanisms available commercially (google on 'concentrating hydrogen peroxide') to take cheaper, more readily available low-concentration H2O2 and bring it up to 90% concentration. See: http://www.meditech.ch/exoticthermoe...ing/ete15.html http://www.peroxidepropulsion.com/ http://www.tecaeromex.com/ingles/destilai.html http://rocketprop.com/index.html - It is not clear if they sell thier peroxide concentrator or it's output either. Have the various X-prize teams using H2O2 looked into making their own? Wouldn't there be fewer regulatory hassles (and so lower costs) when transporting 35%-50% H2O2, perhaps making it cost-effective to buy a concentrator? While there are few hassles buying/transporting 35%-50% H2O2, there are no hassle free way to concentrate peroxide. Problems include thermal runaway, explosive vapours, chemical impurities and maintaining a vaccumn if doing low temperature distillation. Large scale concentrators are very hard to design and a real hassle to run. One company that tried it no longer exists as it's main plant blew up. ERPS who does concentrate peroxide for thier rockets has thier processing station installed in the middle of a desert. My personal work is always on a very small scale, and if I do final scale up it will be on a floating platform in the middle of a lake up north. Also, has anyone looked into using osmotic filtration to concentrate H2O2? Or is the H2O2 molecule too similar in size to H2O? The only filter I have heard of for peroxide was organic in nature. This gives you near zero margin in error in handling. Earl Colby Pottinger -- I make public email sent to me! Hydrogen Peroxide Rockets, OpenBeos, SerialTransfer 3.0, RAMDISK, BoatBuilding, DIY TabletPC. What happened to the time? http://webhome.idirect.com/~earlcp |
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