Importance

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Abstract

Method for controlled delignification of lignocellulosic feedstock, said method comprising the steps of:

providing a reactive phase of pH less than 1, said reactive phase comprising: water;sulfuric acid;a source of peroxide;a modifying agent, said modifying agent adapted to control the reactivity of the sulfuric acid; providing a holding phase, said holding phase comprising an organic solvent which does not react with the aqueous acidic composition;combining said reactive phase and holding phase to form a reaction mixture;exposing a lignocellulosic material to said reaction mixture for a period of time sufficient to allow delignification of the lignocellulosic material.

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First Claim