1999
DOI: 10.1007/bf01177733
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Ready chemical conversion of acid hydrolysis lignin into water-soluble lignosulfonate III: Successive treatment of acid hydrolysis lignin and a lignin model compound by phenolation and arylsulfonation*

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Cited by 35 publications
(26 citation statements)
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“…The S/G ratio of the ReLignin gently increased (Table 4) because the acid pretreatment might led to degradation of the β-O-4 linkages and released more syringyl units than guaiacyl units. Yasuda et al [34] reported that the acid treatment induced a shift toward higher molecular weight distribution of the Kraft lignin because carbon-carbon linkages formed during the acid treatment were favorably substituted by hydroxyl groups.…”
Section: Phenolic Aromatic Compounds From Pyrolysis Of Different Lignmentioning
confidence: 98%
“…The S/G ratio of the ReLignin gently increased (Table 4) because the acid pretreatment might led to degradation of the β-O-4 linkages and released more syringyl units than guaiacyl units. Yasuda et al [34] reported that the acid treatment induced a shift toward higher molecular weight distribution of the Kraft lignin because carbon-carbon linkages formed during the acid treatment were favorably substituted by hydroxyl groups.…”
Section: Phenolic Aromatic Compounds From Pyrolysis Of Different Lignmentioning
confidence: 98%
“…The signals peaking at 56 and 71 ppm suggest that aromatic moieties have a high content of N-alkyl and O-alkyl carbons (Adani et al 2006). The main contributions giving rise to 1 H resonance signals at 3.75-3.92 ppm are likely to arise from CHOH and CH 2 OH functional groups which may indicate the presence of methoxyphenylpropyl repeating unit which typically occur in lignin and ligninlike matter (Yasuda et al 1999) and/or the presence of polysaccharides moieties (Adani et al 2006).…”
Section: Thermal Analysismentioning
confidence: 99%
“…They indicate the presence of repeating units of metylopropyl groups, which are structural units of lignin, and appropriate humic compounds [24]. This signal was not seen in any of the analyzed spectrum, confirming their aliphatic character.…”
Section: Electric Methodsmentioning
confidence: 74%