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Soda-amine pulping : reaction of amines with free phenolic [beta]-[omicron]-4 ethersAuthor(s): John R. Obst
Source: Tappi. Vol. 64, no. 10 (Oct. 1981): pages 99-102.
Publication Series: Miscellaneous Publication
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DescriptionThe quinone methide from guaiacylglycol-ß-guaiacyl ether underwent nucleophilic addition to the a-carbon with primary and secondary amines at 40°C. At pulping temperature, 170°C, only the primary amine adduct was detected. The quinone methide from guaiacylglycerol-ß-guaiacyl ether gave analogous adducts at 40°C, but no quinone methide-amine adducts were detected at 170°C. Instead, the major products were the vinyl ether and a substituted vinyl ether which resulted from a Mannich reaction of the vinylether, amine, and liberated formaldehyde.
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CitationObst, John R. 1981. Soda-amine pulping : reaction of amines with free phenolic [beta]-[omicron]-4 ethers. Tappi. Vol. 64, no. 10 (Oct. 1981): pages 99-102.
KeywordsAmines, pulping, alkaline pulping, quinones, formaldehyde, delignification, condensation, ethers, lignin, Lignin model compounds, Mannich reaction
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