反应详情

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.

1. custombrought to 80° C. until complete disappearance of the solid, i.e., in this case, 1 h
2. temperatureThe mixture is cooled
3. customto remove the inorganic residues
4. stirringof stirring for 30 minutes
5. customa step of separating
6. customexcept for the final separating
7. waitwhich lasts 12 h
8. distillationThe water/MCH azeotrope is subsequently distilled with a Dean Stark apparatus