A process to produce an enriched purified terephthalic acid composition in the purification of crude terephthalic acid to produce said purified terephthalic acid, said process comprising: (a) oxidizing an aromatic feedstock comprising para-xylene in a primary oxidation zone to form a crude carboxylic acid composition, wherein said crude carboxylic acid composition comprises terephthalic acid; (b) optionally subjecting said crude carboxylic acid composition comprising terephthalic acid to a liquid displacement zone to form a slurry composition; (c) cooling and optionally enriching said slurry composition or said crude carboxylic acid composition comprising terephthalic acid in a cooling zone to form a cooled carboxylic acid composition comprising terephthalic acid; (d) subjecting said cooled carboxylic acid composition comprising terephthalic acid, and a wash feed to a catalyst removal zone to form a post catalyst removal composition and a catalyst rich liquor; and (e) subjecting said post catalyst removal composition to an enrichment zone, wherein said post catalyst removal composition is contacted with an enrichment feed to form a depleted enrichment stream and said enriched composition, wherein the enriched composition comprises one or more compounds selected from the group consisting of isophthalic acid, phthalic acid, trimellitic acid, hydroxymethylbenzoic acid isomers, hydroxybenzoic acid isomers, benzoic acid, and toluic acid isomers and wherein at least one of the compounds is enriched above the concentration of the post catalyst removal composition; or wherein the enriched composition comprises one or more compounds selected from the group consisting of isophthalic acid, phthalic acid, trimellitic acid, benzoic acid, 4-hydroxybenzoic acid, 4-hydroxymethylbenzoic acid, 4,4'-dicarboxybiphenyl, 2,6-dicarboxyanthraquinone, 4,4'-dicarboxystilbene, 2,5,4'-tricarboxybiphenyl, 2,5,4'-tricarboxybenzophenone, 4,4'-dicarboxybenzophenone, 4,4'-dicarboxybenzil, form-acet-hydroxybenzoic acid, acet-hydroxymethylbenzoic acid, a-bromo-p-toluic acid, bromo-benzoic acid, bromo-acetic acid, p-tolualdehyde and terephthaldehyde; and wherein said enrichment feed comprises at least one compound selected from the group consisting of isophthalic acid, phthalic acid, benzenetricarboxylic acid isomers, benzoic acid, hydroxybenzoic acid isomers, hydroxymethyl benzoic acid isomers, dicarboxybiphenyl isomers, dicarboxystilbene isomers, tricarboxybiphenyl isomers, tricarboxybenzophenone isomers, dicarboxybenzophenone isomers, dicarboxybenzil isomers, form-acet-hydroxybenzoic acid isomers, acet-hydroxymethylbenzoic acid isomers, a-bromo-toluic acid isomers, bromo-benzoic acid, bromo-acetic acid, tolualdehyde isomers, benzyl alcohol isomers, methyl benzyl alcohol isomers, and phthaldehyde isomers; wherein said wash feed is capable of producing the post catalyst composition and is in form of a liquid or a solution; and wherein the enrichment feed has a composition suitable to enrich the post catalyst removal composition. (a) oxidizing an aromatic feedstock comprising para-xylene in a primary oxidation zone to form a crude carboxylic acid composition, wherein said crude carboxylic acid composition comprises terephthalic acid; (b) optionally subjecting said crude carboxylic acid composition comprising terephthalic acid to a liquid displacement zone to form a slurry composition; (c) cooling and optionally enriching said slurry composition or said crude carboxylic acid composition comprising terephthalic acid in a cooling zone to form a cooled carboxylic acid composition comprising terephthalic acid; (d) subjecting said cooled carboxylic acid composition comprising terephthalic acid, and a wash feed to a catalyst removal zone to form a post catalyst removal composition and a catalyst rich liquor; and (e) subjecting said post catalyst removal composition to an enrichment zone, wherein said post catalyst removal composition is contacted with an enrichment feed to form a depleted enrichment stream and said enriched composition, wherein the enriched composition comprises one or more compounds selected from the group consisting of isophthalic acid, phthalic acid, trimellitic acid, hydroxymethylbenzoic acid isomers, hydroxybenzoic acid isomers, benzoic acid, and toluic acid isomers and wherein at least one of the compounds is enriched above the concentration of the post catalyst removal composition; or wherein the enriched composition comprises one or more compounds selected from the group consisting of isophthalic acid, phthalic acid, trimellitic acid, benzoic acid, 4-hydroxybenzoic acid, 4-hydroxymethylbenzoic acid, 4,4'-dicarboxybiphenyl, 2,6-dicarboxyanthraquinone, 4,4'-dicarboxystilbene, 2,5,4'-tricarboxybiphenyl, 2,5,4'-tricarboxybenzophenone, 4,4'-dicarboxybenzophenone, 4,4'-dicarboxybenzil, form-acet-hydroxybenzoic acid, acet-hydroxymethylbenzoic acid, a-bromo-p-toluic acid, bromo-benzoic acid, bromo-acetic acid, p-tolualdehyde and terephthaldehyde; and wherein said enrichment feed comprises at least one compound selected from the group consisting of isophthalic acid, phthalic acid, benzenetricarboxylic acid isomers, benzoic acid, hydroxybenzoic acid isomers, hydroxymethyl benzoic acid isomers, dicarboxybiphenyl isomers, dicarboxystilbene isomers, tricarboxybiphenyl isomers, tricarboxybenzophenone isomers, dicarboxybenzophenone isomers, dicarboxybenzil isomers, form-acet-hydroxybenzoic acid isomers, acet-hydroxymethylbenzoic acid isomers, a-bromo-toluic acid isomers, bromo-benzoic acid, bromo-acetic acid, tolualdehyde isomers, benzyl alcohol isomers, methyl benzyl alcohol isomers, and phthaldehyde isomers;