Reacción #2039143

Ecuación de reacción

neodymium oxide

neodymium

neodymium nitrate

neodymium

di(2-ethylhexyl)phosphoric acid

methylcyclohexane

→

neodymium di(2-ethylhexyl)phosphate

Rendimiento 99.0%

Disolventes

water

Condiciones de reacción

Tratamiento posterior

1. 1
   Otrobrought to 80° C. until complete disappearance of the solid, i.e., in this case, 1 h
2. 2
   TemperaturaThe mixture is cooled
3. 3
   Otroto remove the inorganic residues
4. 4
   workup.STIRRINGof stirring for 30 minutes
5. 5
   Otroa step of separating
6. 6
   Otroexcept for the final separating
7. 7
   workup.WAITwhich lasts 12 h
8. 8
   workup.DISTILLATIONThe water/MCH azeotrope is subsequently distilled with a Dean Stark apparatus

Procedimiento

2.88 g of neodymium oxide containing 72.4% by weight of neodymium, 0.53 g of an aqueous solution of neodymium nitrate containing 24.4% by weight of neodymium, 17.39 g of di(2-ethylhexyl)phosphoric acid (DEHPA), and 80 g of methylcyclohexane (MCH) are introduced into a reactor made inert beforehand with argon. The mixture is stirred and brought to 80° C. until complete disappearance of the solid, i.e., in this case, 1 h. The mixture is cooled. Three washes with 20 g of water are successively carried out in order to remove the inorganic residues. Each wash comprises a step of stirring for 30 minutes and then a step of separating by settling out, also for 30 minutes, except for the final separating by settling out, which lasts 12 h. The water/MCH azeotrope is subsequently distilled with a Dean Stark apparatus. A clear solution of neodymium di(2-ethylhexyl)phosphate in MCH is thus obtained.

Fuente