The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 29, 2012
Filed:
Mar. 22, 2007
Paolo Biagini, Trecate, IT;
Mario Salvalaggio, Moriondo Torinese, IT;
Franco Cambisi, Oleggio, IT;
Lucia Bonoldi, Milan, IT;
Liliana Gila, Casalino, IL;
Paolo Biagini, Trecate, IT;
Mario Salvalaggio, Moriondo Torinese, IT;
Franco Cambisi, Oleggio, IT;
Lucia Bonoldi, Milan, IT;
Liliana Gila, Casalino, IL;
Polimeri Europa S.p.A., Brindisi, IT;
Abstract
A process is described for the purification of lanthanide carboxylates which comprises a step in which the hydrocarbon solution deriving from the synthesis of lanthanide carboxylate, containing said carboxylate and impurities of the corresponding carboxylic acid and/or water, is treated with an aqueous solution of a base in order to obtain a pH of the aqueous phase ranging from 9.0 to 12.2 and/or a step in which the hydrocarbon solution containing lanthanide carboxylate is treated with a solid selected from NaSO, MgSO, Mg(ClO), molecular sieves 3 Å, molecular sieves 4 Å, molecular sieves 5 Å and molecular sieves 13 X. Analytical methods are also described, which allow the purity of the lanthanide carboxylates to be non-destructively measured.