symboom
International Hazard
Posts: 1143
Registered: 11-11-2010
Location: Wrongplanet
Member Is Offline
Mood: Doing science while it is still legal since 2010
|
|
Hydrogen peroxide from strontium peroxide
Strontium peroxide is produced by passing oxygen over heated strontium oxide (this could be made from reacting strontium nitrate with sodium
bicarbonate to form strontium carbonate which is decomposed by heat to strontium oxide) It is more thermally labile than BaO2.
Strontium peroxide is very soluble in alcohol which gives me an idea.
If hydrochloride is bubbled into the solution it should separate into hydrogen peroxide in alcohol and strontium chloride which is insouble in
alcohol. the alcohol then could be evaporated off to pure hydrogen peroxide.
2HCl (g)+ SrO2 (l) --> SrCl2 (s) + H2O2 (aq)
This is a great reaction due to strontium chloride can be converted to strontium carbonate with addition of sodium bicarbonate. Strontium is conserved
with in this reaction.
|
|
|
Bedlasky
International Hazard
Posts: 1244
Registered: 15-4-2019
Location: Period 5, group 6
Member Is Offline
Mood: Volatile
|
|
If I know, for making SrO2 from SrO and O2 you need high pressure. BaO2 is formed at atmospheric pressure.
Pure hydrogen peroxide is unstable. During evaporation it will decompose and oxidize ethanol.
Easier is to react SrO2 with H2SO4. SrSO4 will precipitate out and you left with H2O2. You can make whatever concentration you need. You can convert
SrSO4 in to SrCO3 just by boiling with Na2CO3.
|
|
|
symboom
International Hazard
Posts: 1143
Registered: 11-11-2010
Location: Wrongplanet
Member Is Offline
Mood: Doing science while it is still legal since 2010
|
|
I found the patent yep it needs to be under pressure
refers to the first form of the material as having certain objections and discloses a method of making the second form comprising the direct
oxidation of strontium oxide. This process involves pressures up to eighteen :hundred pounds per square inch and temperatures up to 500 C. and is
hence costly, dangerous, and wasteful.
Although this part is interesting
The method of manufacturing strontium peroxide which. consists in reacting strontium nitrate and sodium peroxide to form hydrated sintering the dried
peroxide to convert the same strontium peroxide, removing uncombined water to anhydrous strontium peroxide and strontium oxide, quenching the sintered
material in water to convert the oxide to hydroxide and to dissolve the latter, removing and drying the anhydrous strontium peroxide.
Reference
https://patents.google.com/patent/US2357655A/en
That last one is helpful
From prep chem
Five grams of anhydrous strontium nitrate (or the equivalent weight of the 4-hydrate) are dissolved in 50 ml of 3% hydrogen peroxide and mixed with a
solution of 7 ml of concentrated aqueous ammonia in 100 ml of water. As described under the procedure for barium peroxide the SrO2 8-hydrate is
converted to the anhydrous compound by heating it at 800°C for about 4 hours in dry carbon dioxide free oxygen. The yield of SrO2 is
2.5-3 g.
|
|
|
symboom
International Hazard
Posts: 1143
Registered: 11-11-2010
Location: Wrongplanet
Member Is Offline
Mood: Doing science while it is still legal since 2010
|
|
Was trying to find a way around using sodium metal or barium salts for the synthesis of hydrogen peroxide. But I guess this is the only way.
The quickest way I've found to sodium peroxide is reacting lithium with sodium chloride and distilling sodium metal that seems to be the most direct
method to sodium besides electrolysis of molten sodium hydroxide which is a pain to work with.
Li +NaCl -> LiCl + Na
Na + O2 --> sodium peroxide
BaO +O2 = barium peroxide
I just hate to sacrifice a nice metal just for it to be oxidized in the end.
I found the patent and yep it needs to be under pressure
refers to the first form of the material as having certain objections and discloses a method of making the second form comprising the direct
oxidation of strontium oxide. This process involves pressures up to eighteen :hundred pounds per square inch and temperatures up to 500 C. and is
hence costly, dangerous, and wasteful.
Although this part is interesting but that is still just a method to form a peroxide salt and to concentrate hydrogen peroxide.
The method of manufacturing strontium peroxide which. consists in reacting strontium nitrate and sodium peroxide to form hydrated sintering the dried
peroxide to convert the same strontium peroxide, removing uncombined water to anhydrous strontium peroxide and strontium oxide, quenching the sintered
material in water to convert the oxide to hydroxide and to dissolve the latter, removing and drying the anhydrous strontium peroxide.
Reference
https://patents.google.com/patent/US2357655A/en
That last one is helpful
From prep chem which in this case calcium chloride could be substituted to form calcium peroxide even though contact with water hydrolyzes with
release of oxygen. Treatment with acid, it forms hydrogen peroxide.
Five grams of anhydrous strontium nitrate (or the equivalent weight of the 4-hydrate) are dissolved in 50 ml of 3% hydrogen peroxide and mixed with a
solution of 7 ml of concentrated aqueous ammonia in 100 ml of water. As described under the procedure for barium peroxide the SrO2 8-hydrate is
converted to the anhydrous compound by heating it at 800°C for about 4 hours in dry carbon dioxide free oxygen. The yield of SrO2 is
2.5-3 g.
[Edited on 21-11-2020 by symboom]
|
|
|
![[*]](images/xpblue/default_icon.gif){kind=icon}
