Journal of Northeastern University Natural Science ›› 2015, Vol. 36 ›› Issue (7): 966-969.DOI: 10.12068/j.issn.1005-3026.2015.07.012

• Materials & Metallurgy • Previous Articles     Next Articles

Preparation of Lanthanum Hydroxide by Spray Pyrolysis of Lanthanum Chloride

BIAN Xue, WANG Zhen-feng, WANG Jin-yu, WU Wen-yuan   

  1. School of Materials & Metallurgy, Northeastern University, Shenyang 110819, China.
  • Received:2014-06-09 Revised:2014-06-09 Online:2015-07-15 Published:2015-07-15
  • Contact: BIAN Xue
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Abstract: Using H2O2 as auxiliary reagent, the preparation of lanthanum hydroxide by spray pyrolysis of lanthanum chloride was studied. The thermodynamic principle was used to calculate the starting temperature of lanthanum chloride reaction with H2O2, and it is 288℃. The effect of pyrolysis temperature,LaCl3 solution concentration, H2O2 addition and carrier gas pressure on the conversion ratio of La(OH)3 was experimentally studied. The Cl concent analysis, XRD and SEM indicate that the optimum conditions for the pyrolysis are temperature of 600℃, LaCl3 solution concentration of 400g/L, H2O2 addition of 5% and carrier gas pressure of 0.4MPa, resulting in the conversion of 99.96% with debris shape La(OH)3.

Key words: lanthanum chloride, spray pyrolysis, H2O2, lanthanum hydroxide, thermodynamics

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