title: Preparation of a sulfonated carbonaceous material from lignosulfonate and its usefulness as an esterification catalyst.
abstract: Sulfonated carbonaceous material useful as a solid acid catalyst was prepared from lignosulfonate, a waste of the paper-making industry sulfite pulping process, and characterized by 13C-NMR, FT-IR, TGA, SEM and elemental analysis, etc. The sulfonic acid group density and total density of all acid groups in the sulfonated carbonaceous material was determined by titration to be 1.24 mmol/g and 5.90 mmol/g, respectively. Its catalytic activity in the esterification of cyclohexanecarboxylic acid with anhydrous ethanol was shown to be comparable to that of the ionic exchange resin Amberlyst-15, when they were used in the same amount. In the meantime, the sulfonic acid group was found to be leached out by 26%-29% after it was exposed to hot water (95 °C) for 5 h. The catalytic usefulness of the prepared carbonaceous material was investigated by performing esterifications.
authors.affiliation: The Division of Bionanochemistry, the College of Natural Sciences, the Wonkwang University, Iksan City, Chonbuk 570-749, Korea. dl202@wku.ac.kr
authors.forename: Duckhee
authors.initials: D
authors.lastname: Lee
mesh_terms: D000476:Alkanesulfonates / Q000138:chemical synthesis / Q000737:chemistry / Q000494:pharmacology*; D002244:Carbon / Q000737:chemistry; D002384:Catalysis; D003509:Cyclohexanecarboxylic Acids / Q000737:chemistry*; D004951:Esterification; D000431:Ethanol / Q000737:chemistry*; D008031:Lignin / Q000031:analogs & derivatives* / Q000737:chemistry; D013343:Styrenes / Q000737:chemistry; D013451:Sulfonic Acids / Q000737:chemistry; D014867:Water
chemical_list: D000476:Alkanesulfonates; D003509:Cyclohexanecarboxylic Acids; D013343:Styrenes; D013451:Sulfonic Acids; C528218:amberlyst-15; D014867:Water; D000431:Ethanol; D002244:Carbon; C001545:lignosulfuric acid; D008031:Lignin; C044895:cyclohexanecarboxylic acid