title: Synthesis and characterization of new low-cost ILs based on butylammonium cation and application to lignocellulose hydrolysis.
abstract: Fourteen ionic liquids (ILs) were obtained and characterized by nuclear magnetic resonance and infra-red spectroscopy. One of these liquids, n-butylammonium acetate, was used in the treatment of coir fiber prior to acid hydrolysis. For this purpose, the fiber was pulped with 8% (w/w) sodium hydroxide for 6h under 2.5 atm pressure at 137°C and then treated with IL for 2h at 90°C. The samples were hydrolyzed in acetic acid at different concentrations and temperatures. The reducing sugar concentrations were determined in all samples, and the optimal hydrolysis conditions were established (32.2% acetic acid at 122.4°C). The reaction time was also studied, and the conversion was maximized at 3h. Under the best hydrolysis conditions, crude fiber, pulping fiber, and IL-treated fiber were hydrolyzed to yield 8.53%, 47.58%, and 89.75% of reducing sugars, respectively.
authors.affiliation: Departamento de Engenharia Química, Centro Universitário da FEI, Av. Humberto de Alencar Castelo Branco, 3972, 09850-901 São Bernardo do Campo, SP, Brazil.
authors.forename: José Carlos
authors.initials: JC
authors.lastname: de Andrade Neto
authors.affiliation: Departamento de Engenharia Química, Centro Universitário da FEI, Av. Humberto de Alencar Castelo Branco, 3972, 09850-901 São Bernardo do Campo, SP, Brazil.
authors.forename: Allex
authors.initials: A
authors.lastname: de Souza Cabral
authors.affiliation: Departamento de Engenharia Química, Centro Universitário da FEI, Av. Humberto de Alencar Castelo Branco, 3972, 09850-901 São Bernardo do Campo, SP, Brazil.
authors.forename: Lucas Rissato Dognani
authors.initials: LR
authors.lastname: de Oliveira
authors.affiliation: Departamento de Engenharia Química, Centro Universitário da FEI, Av. Humberto de Alencar Castelo Branco, 3972, 09850-901 São Bernardo do Campo, SP, Brazil.
authors.forename: Ricardo Belchior
authors.initials: RB
authors.lastname: Torres
authors.affiliation: Departamento de Engenharia Química, Centro Universitário da FEI, Av. Humberto de Alencar Castelo Branco, 3972, 09850-901 São Bernardo do Campo, SP, Brazil. Electronic address: preamorandim@fei.edu.br.
authors.forename: Andreia de Araújo
authors.initials: Ade A
authors.lastname: Morandim-Giannetti
mesh_terms: D000144:Acids, Acyclic / Q000138:chemical synthesis / Q000737:chemistry; D002082:Butylamines / Q000138:chemical synthesis / Q000737:chemistry*; D002482:Cellulose / Q000737:chemistry*; D005227:Fatty Acids / Q000138:chemical synthesis / Q000737:chemistry; D006868:Hydrolysis; D052578:Ionic Liquids / Q000138:chemical synthesis / Q000737:chemistry*; D008031:Lignin / Q000737:chemistry*; D017550:Spectroscopy, Fourier Transform Infrared; D014961:X-Ray Diffraction
chemical_list: D000144:Acids, Acyclic; D002082:Butylamines; D005227:Fatty Acids; D052578:Ionic Liquids; C036909:lignocellulose; D002482:Cellulose; D008031:Lignin
keywords: Acid hydrolysis; Ionic liquid; Lignocellulose hydrolysis