ISSN print edition: 0366-6352
ISSN electronic edition: 1336-9075
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Study of alkali sulfite-lignin. I. Chlorination with hypochlorites

J. Polčín

Forschungsinstitut der Celluloseindustrie in Bratislava

 

Abstract: There is chlorination as well as oxidation in the reaction between hypochlorites and alkali sulfite-lignin (AS-L) in alk. and neutral medium. By increasing alky. and temp., oxidation is favored and chlorination retarded. By adding 1 mole of NaOCl to 100 g. AS-L in alk. medium, by oxidation, first the side chain of lignin is cleaved, but the MeO groups are unchanged. By addnl. NaOCl and decreasing alky., MeO is split off and soly. of AS-L in slightly acid medium is increased.

Full paper in Portable Document Format: 84a227.pdf (in Slovak)

 

Chemical Papers 8 (4) 227–234 (1954)

Thursday, June 04, 2020

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