Purification of Aluminum Nitrate Nonahydrate by Melt Crystallization

JOURNAL OF CHEMICAL ENGINEERING OF JAPAN

Takuya Hoshino¹  Yoshinori Izumi¹  Yusuke Fujita¹  Izumi Hirasawa¹  Mizuki Kumashiro¹ 

[1] Department of Applied Chemistry, Graduate School of Advanced Science and Engineering, Waseda University

关键词: Purification;    Melt Crystallization;    Inorganic Hydrate;   

DOI  :  10.1252/jcej.10we239

来源: Maruzen Company Ltd

【 摘 要 】

References(13)Cited-By(1)The objective of our study is to investigate the effect of melt crystallization on inorganic hydrate for purification of crystals including impurity. Melt crystallization is widely applied in the chemical and food industry to purify organic crystals by separating impurities inside the crystals. The target crystals are mainly organic crystals; however, some inorganic crystals are considered for purification by melt crystallization, because of having lower melting point as hydrate crystals. Therefore, we prepared hydrate crystals including impurities and carried out melt crystallization to investigate the purification mechanism on inorganic crystals. Aluminum nitrate nonahydrate was selected as purification target and strontium nitrate was selected as liquid impurity. As solid impurity, we selected barium nitrate. In conclusion, liquid impurity in target crystals was removed by sweating and washing with melt. Moreover, it was considered that the purification mechanism differs depending on the state of the impurity, and melt crystallization is an effective tool for purification the inorganic hydrate crystals.

【 授权许可】

Unknown