EXTRACTION OF LANTHANUM AND CERIUM FROM A BASTNASITE ORE BY DIRECT ACIDIC LEACHING

Year 2020, , 85 - 92, 01.06.2020

Sait Kursunoglu Soner Top Shokrullah Hussaini Hasan Serkan Gokcen , Mahmut Altiner Safak Ozsarac Muammer Kaya

https://doi.org/10.30797/madencilik.757979

Cited By: 1

Abstract

The extraction of lanthanum (La) and cerium (Ce) from a bastnasite ore by direct acidic leaching
was investigated. The effects of acid concentration and leaching temperature on the extraction of
La and Ce from the ore were tested. Using nitric (NHO3), more than 85% of the La and Ce were
simultaneously extracted into leach solution whereas the La and Ce dissolutions were determined
as less than 85% by using sulfuric acid (H2SO4). The La dissolution exceeded 90% by using
hydrochloric acid (HCl); however, the Ce dissolution remained below 85% under the following
conditions: solid-to-liquid ratio of 20% (w/v), the acid concentration of 20%, leaching temperature
of 25 °C and leaching time of 1 h. The result revealed that HNO3 could be used as a solvent for
the maximum simultaneous extraction of the La and Ce from the bastnasite ore. The leaching
temperature had no crucial effect on the dissolution of La and Ce when HNO3 or HCl solutions
were preferred as a solvating agent. However, the leaching temperature had a slight positive effect
on the dissolutions of La and Ce when H2SO4 was used as a solvent.

Keywords

Lanthanum, Cerium, Direct acidic leaching, Bastnasite ore

DİREKT ASİT LİÇİ İLE BASTNAZİT CEVHERİNDEN LANTANYUM VE SERYUM KAZANIMI

Abstract

Direkt asit liçi ile bir bastnazit cevherinden lantanyum (La) ve seryum (Ce) ekstraksiyonu
araştırılmıştır. Bastnazit cevherinden La ve Ce ekstraksiyonuna asit konsantrasyonu ve liç
sıcaklığının etkileri test edilmiştir. Nitrik asit (NHO3) kullanarak La ve Ce’un %85’ten fazlası liç
çözeltisine alınmıştır ancak çözünme değerleri sülfürik asit (H2SO4) kullanıldığında %85’ten az
olarak belirlenmiştir. La çözünümü hidroklorik asit (HCl) kullanımıyla %90’ı geçmiştir fakat Ce
çözünümü %20 (g/L) katı-sıvı oranı, %20 asit konsantrasyonu, 25 °C liç sıcaklığı ve 1 saat liç
süresi şartları altında %85’in altında kalmıştır. Sonuçlar bastnazit cevherinden eş zamanlı olarak
maksimum La ve Ce çözünümüne ulaşılabilmek için çözücü olarak HNO3 kullanılabileceğini ortaya
koymuştur. Çözücü olarak HNO3 ve HCl tercih edildiğinde liç sıcaklığının La ve Ce çözünümüne
önemli bir etki yapmadığı belirlenmiştir. Fakat çözücü olarak H2SO4 kullanılmasıyla liç sıcaklığının
La ve Ce çözünmeleri üzerine hafif bir pozitif etkisi saptanmıştır.

Keywords

Lantanyum, Seryum, Direkt asit liçi, Bastnazit cevheri

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