Patent ID: 8350072

Claim:
A method for producing soluble neodymium chloride complex, comprising: mixing neodymium chloride aqueous solution, alcohol and dialkyl phosphite in a reactor to form a homogeneous phase system; letting the system to react at a temperature of 10-150° C. for 5 minutes to 12 hours, wherein a molar ratio of dialkyl phosphite to neodymium chloride is in a range of 0.5-60, and a ratio of the alcohol to the neodymium chloride aqueous solution is in a range of 3.0-30 by volume; and removing water and alcohol out of the system to obtain a neodymium chloride-dialkyl phosphite complex; wherein said neodymium chloride aqueous solution is saturated or nonsaturated neodymium chloride aqueous solution; said alcohol is selected from the group consisting of methanol, ethanol, propanol, and any mixtures thereof; said dialkyl phosphite has a structure shown by the following formula: R 1 and R 2 each independently represents alkyl group with 1 or more carbon atoms, R 3 is an alkylidene group with 2 or more carbon atoms.