Sulfonation of polyhydroxyaromatics

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United States of America Patent

PATENT NO 8492581
APP PUB NO 20110046412A1
SERIAL NO

12859922

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Abstract

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The present invention provides improved process for the sulfonation of hydroxyaromatics amenable to direct isolation of the sulfonylated hydroxyaromatics in their free-acid forms. The process allows for the recyclization of sulfuric acid and minimizes waste. The starting materials are from a renewal resource, e.g., biomass, and contain detectable 14C up to a 14C content of 0.0000000001% (one part per trillion). The products made include sulfonated catechol, disulfonated pyrogallol and sulfonated protocatechuic acid.

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Patent Owner(s)

  • AMYRIS, INC.

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Bui, Vu East Lansing, US 18 131
Frost, John W Okemos, US 45 851

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