Sulfonic acid functionalized mesoporous molecular sieves as catalysts for the synthesis of adipic acid from 2,5 tetrahydrofurandicarboxylic acid

Анотація

Adipic acid (AA) is a key monomer in the production of nylon-66, a variety of plasticisers, resins, and polyurethanes, and is also used as a food (E355) and pharmaceutical additive. However, the traditional process for AA production, which utilises petroleum-derived feedstocks, is characterised by high energy consumption and the emission of nitrogen oxides into the atmosphere. Alternative methods employ 5-hydroxymethylfurfural (5-HMF) and its derivatives obtained from biomass processing. This process involves several stages: the conversion of 5-HMF to tetrahydrofuran-2,5-dicarboxylic acid, followed by furan ring opening. This work investigates the catalytic process for the synthesis of adipic acid (fig. 1) from tetrahydrofuran-2,5-dicarboxylic acid (2,5-THFDCA) [1,2].