Influence of solvent additives on the aqueous extraction of tannins from pine bark: potential extracts for leather tanning

BACKGROUND Pine bark, which represents approximately 10 to 20% in weight of the tree trunk, is an abundant and low cost agro‐industrial waste. In order to obtain condensed tannin‐rich pine bark extracts (for future application in leather tanning/retanning processes), conventional aqueous extractions...

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Veröffentlicht in:	Journal of chemical technology and biotechnology (1986) 2018-04, Vol.93 (4), p.1169-1182
Hauptverfasser:	Seabra, Inês J, Chim, Rita B, Salgueiro, Paul, Braga, Mara EM, de Sousa, Hermínio C
Format:	Artikel
Sprache:	eng
Schlagworte:	Additives Agricultural wastes Bark Catechin Chromium Chromium salts Environmental impact Equivalence Ethanol extraction Formic acid Gallic acid green engineering/products Industrial wastes Leather Phenols Pine Pine trees Plant extracts process technology residues Retanning Salts Sodium Sodium hydroxide Sodium sulfite Solvents Sulfite Tanning Tannins wood industry
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