I've distilled hydrogen peroxide many times before (to above 90%)... All you really need is a vacuum pump capable of reaching a few torr in pressure (mine reaches down to 3torr). and a vacuum flask. If you really want no hydrogen peroxide to leave the boiling flask (like if you wanted to distill 3% to 90% you will need a vergrex column about four to five feet tall coming out of the boiling flask. and a water trap/ condenser to condense the h20(g) before it gets sucked into the vacuum pump. And keep the boiling flask in a large water bath so the room temp water warms the boiling flask (because boiling is endothermic of course). Here is a video of one experiment that I did with some of my 90%
