Assertion: demethylated lignin | /r/AtLocation | organic solvent phase
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Source sentences:
text: Stated in more detailed process terms the herein-disclosed methods for extracting demethylated lignin from a demethylated lignin-containing aqueous solution comprise: (1) mixing a demethylated lignin-containing solution, and especially a demethylated lignin-containing solution which is acidified by use of certain acids hereinafter more fully described (again those skilled in this art will appreciate that, by way of example, raffinate is alkaline and would have to be acidified in order to carry out the herein disclosed demethylated lignin extraction process) with a polar, partially water immiscible organic solvent to form a demethylated lignin-containing aqueous solution/organic solvent mixture; (2) allowing the demethylated lignin-containing aqueous solution/organic solvent mixture to form at least two layers or phases wherein at least one of the two phases is an aqueous phase and at least one of the phases is an organic solvent phase which contains at least a portion of the demethylated lignin contained in the demethylated lignin-containing aqueous solution; (3) separating the aqueous phase from the organic solvent phase; and (4) recovering the demethylated lignin contained in the organic solvent phase.
text: Also stated in more detailed process terms the herein disclosed processes also contemplate methods for employing a demethylated lignin dissolved in a demethylated lignin-containing alkaline aqueous solution (e.g., raffinate) to produce a resol resin, (such as, for example, those resol resins used in the manufacture of wood adhesives) which methods preferably comprise: (1) mixing a demethylated lignin-containing aqueous solution with a polar, partially water immiscible organic solvent to form a demethylated lignin-containing aqueous solution/organic solvent mixture; (2) allowing the lignin-containing aqueous solution/organic solvent mixture to form two or more phases or layers wherein at least one of the two or more phases is an aqueous phase and at least one of the two or more phases is an organic solvent phase which contains at least a portion of the demethylated lignin contained in the demethylated lignin-containing aqueous solution; (3) separating the aqueous phase from the organic solvent phase; (4) recovering the demethylated lignin contained in the organic solvent phase; (5) dissolving the recovered demethylated lignin in an alkaline medium (preferably, wherein the alkali used to produce the alkaline medium is selected from the group consisting of metal hydroxides such as sodium hydroxide, potassium hydroxide and calcium hydroxide to produce a reaction medium
text: Stated in more detailed process terms the herein-disclosed methods for extracting demethylated lignin from a demethylated lignin-containing aqueous solution comprise: (1) mixing a demethylated lignin-containing solution, and especially a demethylated lignin-containing solution which is acidified by use of certain acids hereinafter more fully described (again those skilled in this art will appreciate that, by way of example, raffinate is alkaline and would have to be acidified in order to carry out the herein disclosed demethylated lignin extraction process) with a polar, partially water immiscible organic solvent to form a demethylated lignin-containing aqueous solution/organic solvent mixture; (2) allowing the demethylated lignin-containing aqueous solution/organic solvent mixture to form at least two layers or phases wherein at least one of the two phases is an aqueous phase and at least one of the phases is an organic solvent phase which contains at least a portion of the demethylated lignin contained in the demethylated lignin-containing aqueous solution; (3) separating the aqueous phase from the organic solvent phase; and (4) recovering the demethylated lignin contained in the organic solvent phase.
text: Also stated in more detailed process terms the herein disclosed processes also contemplate methods for employing a demethylated lignin dissolved in a demethylated lignin-containing alkaline aqueous solution (e.g., raffinate) to produce a resol resin, (such as, for example, those resol resins used in the manufacture of wood adhesives) which methods preferably comprise: (1) mixing a demethylated lignin-containing aqueous solution with a polar, partially water immiscible organic solvent to form a demethylated lignin-containing aqueous solution/organic solvent mixture; (2) allowing the lignin-containing aqueous solution/organic solvent mixture to form two or more phases or layers wherein at least one of the two or more phases is an aqueous phase and at least one of the two or more phases is an organic solvent phase which contains at least a portion of the demethylated lignin contained in the demethylated lignin-containing aqueous solution; (3) separating the aqueous phase from the organic solvent phase; (4) recovering the demethylated lignin contained in the organic solvent phase; (5) dissolving the recovered demethylated lignin in an alkaline medium (preferably, wherein the alkali used to produce the alkaline medium is selected from the group consisting of metal hydroxides such as sodium hydroxide, potassium hydroxide and calcium hydroxide to produce a reaction medium