Huahuang
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Preparation of perchloric acid
Can perchloric acid be prepared by introducing nitrogen trioxide into ammonium perchlorate? The reaction product between sodium perchlorate and
hydrochloric acid is difficult to purify except for distillation, which is too dangerous. Can nitrous acid completely remove ammonium ions? If excess
nitric acid is produced, I really can't think of any better way to remove it
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Sir_Gawain
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A mixture of hydrochloric and nitric acid can completely oxidize the ammonium ion. You simply dissolve ammonium perchlorate in water, add the correct
amount of HCl, bring to a boil and slowly add nitric acid. Then you raise the temp to 200°C to get quite pure 70% perchloric acid.
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Radiums Lab
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Chemical force on youtube has a video on anhydrous perchloric acid go watch it, its really an intilligent setup.
Water is dangerous if you don't know how to handle it, elemental fluorine (F₂) on the other hand is pretty tame if you know what you are doing.
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Nemo_Tenetur
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Anhydrous perchloric acid is really dangerous, as it sometimes explodes without obvious reason. An azeotropic ca. 70% aqueous solution is, however,
manageable. I´ve done a fractional vacuum distillation without problems. The boiling point is about 100- 105 degree centigrade at a two stage
diaphragm pump, depending on the temperature of the cooling water.
I wonder that ammonium perchlorate is available for the general public in several countries around the world, whereas perchloric acid seems to be a
"hard to get" chemical.
Here in Germany, it´s vice versa. Ammonium perchlorate is generally classified as high explosive 1.1 D, regardless of the grain size, and you
require a special high explosive license for aquisition, possession and use. Perchloric acid is not regulated, neither by EU directive nor national
law. I can buy it even without end user declaration.
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Huahuang
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I saw on Wikipedia that ammonium chlorate can react with nitric acid to produce perchloric acid. Has anyone actually done this reaction?”
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Laboratory of Liptakov
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To start, I recommend using the 100x tried and tested method from Horace C. Adams / Sir_Gawain reccomend
https://www.youtube.com/watch?v=KXpGlgj9_uw
Development of primarily - secondary substances: CHP (2015) neutral CHP and Lithex (2022) Brightelite (2023) Nitrocelite and KC primer (2024) Diper
60 (2025)
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