Preparation of solutions of rare-earth organophosphates
OwnerThomas Mathivetinventor
Life of this patent
Estimating the term…
Abstract
A method for preparing solutions of rare-earth organophosphates in an organic solvent includes a first step of reacting, with an organophosphated acid, a rare-earth compound selected from among the rare-earth oxides, hydroxides, acetates, carboxylates, carbonates and bicarbonates in the absence of the organic solvent of in the presence of the solvent in an amount not exceeding 50% of the final amount if the solvent in the solution; and a second step that includes adding the remaining quantity of the solvent to the product of the reaction of the preceding step.
Claims8
1-6. (canceled)
A process for preparing a solution of a rare-earth metal organophosphate in an organic solvent, which comprises the following steps:
- reacting, with an organophosphorus-based acid, a rare-earth metal compound selected from the group consisting of rare-earth metal oxides, hydroxides, acetates, carboxylates, carbonates and bicarbonates, in the absence of said organic solvent or in the presence of solvent in an amount not exceeding 50% of the final amount of said solvent in the solution;
- and
- adding the remaining amount of solvent to the product of the reaction of the preceding step.
Dependencies are inferred from the claim text.