An acid composition comprising 2-formyl-furan-5-carboxylic acid and 2,5-furandicarboxylic acid is purified in a process which comprises; contacting the acid composition with an alcohol to obtain an esterified composition; and separating the ester of 2-formyl-furan-5-carboxylic acid from the esterified composition to obtain a purified esterified product; and contacting the purified esterified composition with water for saponification or hydrolysis, to obtain a product composition, comprising 2,5-furandicarboxylic acid and a reduced amount of 2-formyl-furan-5-carboxylic acid.
一种包括2-甲醛基-
呋喃-5-
羧酸和2,5-
呋喃二
羧酸的酸组合物在一个过程中被纯化,该过程包括:将酸组合物与醇接触以获得酯化的组合物;并从酯化的组合物中分离出2-甲醛基-
呋喃-5-
羧酸的酯,以获得纯化的酯化产品;并将纯化的酯化组合物与
水接触以进行皂化或
水解,以获得一个产品组合物,包括2,5-
呋喃二
羧酸和减少量的2-甲醛基-
呋喃-5-
羧酸。