hydrogen peroxide

[shadowcoder]

I need to find an article or some form of instructions on how to make >90% concentrated hydrogen peroxide.... any ideas? I need it to be this concentrated because I will be using it in some experimental model rockets.

[chemguy]

H2O2 can be made by the electrolysis of ammonium bisulphate (NH4HSO4) or sulfuric acid H2SO4 followed by hydrolysis of the product formed, which is (Prepare yourself) The peroxydisulphate - or ((SO4)2) two minus. For propellants you could use down to 80% H2O2.

H2O2 gives off highly explosive vapour above 70% that detonates at around 75 degrees celcius.