EP3133064A1 - PROCESS FOR THE PREPARATION OF 2,5-FURANDICARBOXYLIC ACID (FDCA) BY OXIDATION OF 5-(HYDROXYMETHYL)FURFURAL (HMF) OR 5-(ALKYLOXYMETHYL)FURFURAL (AMF) WITH OXYGEN IN THE PRESENCE OF A CO(II) OR CE(III) CATALYST, A BROMIDE SALT AND A SOLVENT