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US 2013/0172540 A1Published application
Compositions Comprising Lignin
AssigneeRenmatix, Inc.
InventorsMichel Adam Simard, Srinivas Kilambi, Kiran L. Kadam
Life of this patent
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Abstract
Compositions comprising lignin and low levels of undesirable impurities, such as compounds containing sulfur, nitrogen, or metals, are disclosed.
Claims34
A composition, comprising:
- lignin;
- and
- less than about 2000 mg in total per kg of said lignin of elements;
- wherein said elements are Al, As, B, Ba, Be, Ca, Cd, Co, Cr, Cu, Fe, K, Li, Mg, Mn, Mo, Na, Ni, P, Pb, S, Sb, Se, Si, Sn, Sr, Ti, Tl, V, and Zn;
- wherein said composition is produced by a process comprising:
- providing a mixture comprising lignocellulosic biomass and water;
- heating said mixture to a temperature of about 130° C. to about 250° C. for a period of about 0.5 min to about 5 hours, thereby producing a solids fraction and a liquid fraction;
- and
- subjecting said solids fraction to a supercritical or near-critical fluid under a pressure of no greater than about 300 bar;
- wherein said supercritical or near-critical fluid comprises water;
- and
- wherein said supercritical or near-critical fluid is at a temperature of about 374° C. to about 600° C.
9 more elements
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A composition, comprising:
- lignin;
- less than about 700 mg of calcium per kg of said lignin;
- less than about 525 mg of iron per kg of said lignin;
- and
- less than about 150 mg of sulfur per kg of said lignin;
- wherein said composition is produced by a process comprising:
- providing a mixture comprising lignocellulosic biomass and water;
- heating said mixture to a temperature of about 130° C. to about 250° C. for a period of about 0.5 min to about 5 hours, thereby producing a solids fraction and a liquid fraction;
- and
- subjecting said solids fraction to a supercritical or near-critical fluid under a pressure of no greater than about 300 bar;
- wherein said supercritical or near-critical fluid comprises water;
- and
- wherein said supercritical or near-critical fluid is at a temperature of about 374° C. to about 600° C.
10 more elements
A composition, comprising:
- lignin;
- and
- less than about 525 mg of iron per kg of said lignin;
- wherein said composition is produced by a process comprising:
- providing a mixture comprising lignocellulosic biomass and water;
- heating said mixture to a temperature of about 130° C. to about 250° C. for a period of about 0.5 min to about 5 hours, thereby producing a solids fraction and a liquid fraction;
- and
- subjecting said solids fraction to a supercritical or near-critical fluid under a pressure of no greater than about 300 bar;
- wherein said supercritical or near-critical fluid comprises water;
- and
- wherein said supercritical or near-critical fluid is at a temperature of about 374° C. to about 600° C.
8 more elements
A composition, comprising:
- lignin;
- and
- less than about 150 mg of sulfur per kg of said lignin;
- wherein said composition is produced by a process comprising:
- providing a mixture comprising lignocellulosic biomass and water;
- heating said mixture to a temperature of about 130° C. to about 250° C. for a period of about 0.5 min to about 5 hours, thereby producing a solids fraction and a liquid fraction;
- and
- subjecting said solids fraction to a supercritical or near-critical fluid under a pressure of no greater than about 300 bar;
- wherein said supercritical or near-critical fluid comprises water;
- and
- wherein said supercritical or near-critical fluid is at a temperature of about 374° C. to about 600° C.
8 more elements
Dependencies are inferred from the claim text.