METHOD OF OBTAINING DI-(2-ETHYLHEXYL) PHOSPHORIC ACID AND ITS NEODYMIUM SALT

摘要

FIELD: chemistry.;SUBSTANCE: invention relates to a method of producing di-(2-ethylhexyl) phosphoric acid, which is used in extraction processes, ion exchangers, and neodymium salt thereof, which is used during catalysis. Disclosed is a method of producing di-(2-ethylhexyl) phosphoric acid and a solution of its neodymium salt in an aliphatic or acyclic solvent by reacting phosphorus trichloride with 2-ethylhexanol, followed by chlorination of the formed di-(2-ethylhexyl)phosphate and hydrolysis of di-(2-ethylhexyl) chlorophospate, wherein in order to obtain di-(2-ethylhexyl) phosphoric acid and its high-purity neodymium salt, hydrolysis is carried out through successive treatment of chlorophophate with jet steam at temperature 95-100°C and then with 20% aqueous solution of sodium hydroxide at temperature 105 -115°C, followed by treatment with hydrochloric acid in an organic solvent to obtain di-(2-ethylhexyl) phosphoric acid or with aqueous solution of neodymium chloride to obtain a solution of neodymium tris-[di-(2-ethylhexyl)] phosphate.;EFFECT: novel method of producing a high-purity compound and its neodymium salt.;9 cl, 7 ex