the present invention refers to a process for production of a mixture including 2 , 4 - furandicarboxylic acid and 2 , 5 furandicarboxylic acid through the disproportionation route , using as base compounds oxidation products of furfural . this invention also relates to a process for production of 2 , 4 - fdca as a result of a disproportionation route and the use of 2 , 4 - fdca as a monomer or comonomer to synthesize esters or any compounds which can generate macromolecules , such as polyesters .