The brown compounds, composed mainly of lignin monomers
and other pigments, existing in the ultrafiltration permeates
of sugarcane bagasse influenced the purity of the coumaric
acid obtained and the resin regeneration. Powdered activated
charcoal, used for the decoloration of the ultrafiltration
alkaline hydrolysate prior to purification by anion exchange
chromatography, ensured the repeated use of the resins and
allowed the collection of a pure final product, p-coumaric acid,
thus significantly reducing preparation costs. 8.56 g of crystal
contained 95.2% of coumaric acid from 1000 g of sugarcane
bagasse was obtained, the technology ensured reuse of the
anion exchange resins.
The brown compounds, composed mainly of lignin monomersand other pigments, existing in the ultrafiltration permeatesof sugarcane bagasse influenced the purity of the coumaricacid obtained and the resin regeneration. Powdered activatedcharcoal, used for the decoloration of the ultrafiltrationalkaline hydrolysate prior to purification by anion exchangechromatography, ensured the repeated use of the resins andallowed the collection of a pure final product, p-coumaric acid,thus significantly reducing preparation costs. 8.56 g of crystalcontained 95.2% of coumaric acid from 1000 g of sugarcanebagasse was obtained, the technology ensured reuse of theanion exchange resins.
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