Aqueous lignin and hemicellulose dispersion
AssigneeSustainable Fiber Technologies, LLC
InventorMark Lewis
Life of this patent
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Abstract
A stable aqueous dispersion of solids in a liquid medium includes from 10 to 50 weight % (or 10 to 40 or 15 to 35 or 20 to 35 weight %), with respect to the total weight of the composition, of solids comprising a mixture of condensed and non-condensed lignin in an amount of at least 10 weight % (or 20 or 30 or 40 or 50 weight %) of the solids, and hemicellulose in an amount of at least 1 weight % (or 5 or 10 or 20 or 30 or 40 weight %) of the solids, in a substantially aqueous liquid medium.
Claims8
A stable aqueous dispersion comprising:
- solids in an amount from 10 to 50 weight % (or optionally, 10 to 40 or 15 to 35 or 20 to 35 weight %), with respect to the total weight of the dispersion, stably dispersed in a liquid medium;
- wherein the solids comprise
- (i) lignin in an amount of at least 10 weight % (or optionally, 20 or 30 or 40 or 50 weight %) of the solids wherein the lignin comprises less than 90 weight % (or optionally, 80 or 70 weight %) of condensed oligomers/polymers, and 10% weight % (or optionally, 20 or 30 weight %) of non-condensed monomers/oligomers/polymers, and
- (ii) hemicellulose in an amount of at least 1 weight % (or optionally, 5 or 10 or 20 or 30 or 40 weight %) of the solids, and
- less than 5 weight percent % (or optionally, 2.5 or 1 or 0.5 weight %) of the solids of a monosaccharide,
- wherein the liquid medium comprises water,
- wherein the dispersion comprises less than 500 parts per million (ppm) (or optionally, 200, or 100 or 50 ppm) of sulfur, and
- wherein the dispersion is substantially free of anthraquinone.
A liquor composition derived from processing non-wood agricultural materials, comprising:
- from 10 to 50 weight % (or optionally, 10 to 40 or 15 to 35 or 20 to 35 weight %) with respect to the total weight of the composition, solids stably dispersed in a liquid medium;
- wherein the solids comprise—
- (i) lignin in an amount of at least 10 weight % (or optionally, 20 or 30 or 40 or 50 weight %) of the solids wherein the lignin comprises less than 90 weight % (or optionally, 80 or 70 weight %) of condensed oligomers/polymers, and 10% weight % (or optionally, 20 or 30 weight %) of monomers and noncondensed oligomers/polymers,
- (ii) hemicellulose in an amount of at least 1 weight % (or optionally, 5 or 10 or 20 or 30 or 40 weight %) of the solids, and
- (iii) less than 5 weight percent % (or optionally, 2.5 or 1 or 0.5 weight %) of the solids of a monosaccharide,
- wherein the liquid medium comprises—
- a. water, and
- b. less than 5% by volume (or optionally, 2.5 or 1% by volume) with respect to the liquid medium of a C1-C10 alcohol,
- wherein the dispersion comprises less than 500 parts per million (ppm) (or optionally, 200, or 100 or 50 ppm) of sulfur,
- wherein the dispersion is substantially free of anthraquinone, and
- wherein the dispersion is alkaline.
Dependencies are inferred from the claim text.