Aluminum nitrate nonahydrate → Aluminum nitrate

Participants

Reaction Steps

750.26 g (2 moles) of aluminum nitrate nonahydrate (Al(NO3)3.9H2O)(manufactured by Kansai Catalyst Co., Ltd., reagent grade, appearance: powder) was dissolved in 1555.7 g of water to obtain an aluminum nitrate solution. The aluminum nitrate solution was added with 56.67 g of seed crystal described above (11.33 g in terms of Al2O3), and then further added under agitation at a room temperature with 340.46 g of 25% aqueous ammonium (manufactured by Wako Pure Chemical Industries, Ltd., special reagent grade), that is 85.12 g (5 moles) in terms of NH3, at the feed rate of 32 g/minute by a micro rotary pump to obtain a mixture. The mixture obtained had a pH of 3.8. The mixture was maintained at a room temperature, followed by drying at 60° C., then pulverized with a mortar to obtain a mixed powder. The mixed powder contained 85 g (in terms of Al2O3) of amorphous alumina, 390 g (in terms of NH4NO3) of ammonium nitrate(pyrolysis temperature: about 330° C.), 71 g (in terms of Al(NO3)3) of aluminum nitrate(pyrolysis temperature: about 150° C.) and the seed crystal. The amount of the seed crystal in terms of Al2O3 was 10 parts by weight per 100 parts by weight of the mixed powder.

Provenance & Evidence