Preparation of barium peroxide
Preparation of barium peroxide from barium oxide and air
Twenty-six grams of barium nitrate are placed in a large covered crucible and heated with slowly rising temperature to a dull red color (about 500°C) for about one-half hour. After cooling, the mass is broken up quickly into small lumps and transferred rapidly to a weighed combustion tube. The tube and contents are weighed to determine the amount of barium oxide present and then heated in a circular combustion oven at about 460°G in a steady stream (about 3 bubbles/sec) of air which has been dried by passing first through sodium hydroxide and then through concentrated sulfuric acid. After cooling in the air current, the tube is weighed; the increase in weight should correspond to one-tenth the initial weight of the barium oxide, otherwise the material must be reheated again in oxygen using a slightly higher temperature (500° C).
Preparation of barium peroxide from hydrogen peroxide and barium hydroxide
Thirty grams of barium hydroxide are agitated with 500 ml of distilled water in a stoppered Erlenmeyer flask at 14° C until no more of the alkali dissolves. The mixture is then filtered by suction into 25 ml of fresh 3% hydrogen peroxide. The barium peroxide 8-hydrate that forms is first dehydrated in vacuum over phosphorus pontoxide in a desiccator, and then at 100°C. The yield of barium peroxide is 2.5-3 g.
Inorganic laboratory preparations, by G. G. Schlessinger, 7-8, 1962
BARIUM PEROXIDE, Barium binoxide, Barium dioxide, Barium superoxide, Barium peroxide (Ba(O2)), Barium oxide, per-, Bariumperoxid [German], Bariumperoxyde [Dutch], Dioxyde de baryum [French], Peroxyde de baryum [French], HSDB 396, Bario (perossido di) [Italian], EINECS 215-128-4, UN1449, Bariumperoxid, Bariumperoxyde, Dioxyde de baryum, Peroxyde de baryum, Bario (perossido di), Ba(O2), MolPort-003-925-965, Barium peroxide [UN1449] [Oxidizer], Barium peroxide [UN1449] [Oxidizer], 1304-29-6, LS-24695, 16678-58-3, 55396-27-5, 61233-09-8