Application of ion-exclusion chromatography to alkaline pulping liquors; separation of hydroxy carboxylic acids from inorganic solids

The recovery of aliphatic carboxylic acids from alkaline liquors from soda-anthraquinone pulping was feasible on a column filled with strongly acidic polystyrene cation exchange resins. Prior to elution with warm water (65C), the liquors were acidified with sulphuric acid to precipitate most of the...

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Veröffentlicht in:	Journal of chemical technology and biotechnology (1986) 1991, Vol.51 (2), p.225-233
Hauptverfasser:	Alen, R, Sjostrom, E, Suominen, S
Format:	Artikel
Sprache:	eng
Schlagworte:	acidification acids alkaline pulping anthraquinones Applied sciences black liquor black liquors carboxylic acids cation exchange resins chemical precipitation chromatography Exact sciences and technology fractionation hydroxy acids inorganic compounds ion-exclusion chromatography ion-exclusion partition fractionation ions kraft lignin liquid wastes Paper, paperboard, non wovens Pinus sylvestris Polymer industry, paints, wood pulp and paper mill effluents sodium sulfate Spent liquors sulfuric acid volatile compounds Wood. Paper. Non wovens
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Beschreibung
Zusammenfassung:	The recovery of aliphatic carboxylic acids from alkaline liquors from soda-anthraquinone pulping was feasible on a column filled with strongly acidic polystyrene cation exchange resins. Prior to elution with warm water (65C), the liquors were acidified with sulphuric acid to precipitate most of the lignin and to liberate the hydroxy acids. This method of separation seemed promising in connection with kraft black liquors, but the optimal conditions were yet to be determined.
ISSN:	0268-2575 1097-4660
DOI:	10.1002/jctb.280510208