ISSN print edition: 0366-6352
ISSN electronic edition: 1336-9075
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Alkali sulfite lignin. II. The composition and the functional groups

J. Polčin

Forschungsinstitut der Zelluloseindustrie in Bratislava

 

Abstract: cf. C.A. 49, 7240g. Alkali sulfite lignin (I) obtained by heating sulfite liquor with NH3 under pressure contains organically bound N and a decreased amt. of S. The N is bound either by addn. to the enol bond or by replacement of a sulfite group. The presence of keto-enol configuration can be proven by the pptn. of I with HI as a halogen deriv. of lignin. The amt. of MeO in I (1 in each C9 building stone) remains about the same.

Full paper in Portable Document Format: 105a300.pdf (in Slovak)

 

Chemical Papers 10 (5) 300–309 (1956)

Thursday, June 04, 2020

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