Ultrapure kraft lignin composition
AssigneeRen Fuel K2B AB
InventorsChristian DAHLSTRAND, Alexander OREBOM
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Abstract
The present invention relates to a composition comprising Kraft lignin a very low amount of metal and inorganic compounds. The composition may be used in a refinery process to prepare fuel.
Claims21
A composition comprising Kraft lignin having a weight average molecular weight (Mw) of less than 5,000 g/mol and wherein the total metal content of the composition is less than 400 ppm by weight;
- wherein the sodium content is less than 100 ppm by weight and wherein the content of transition metals is less than 150 ppm by weight.
The composition according to any one of the preceding claims wherein the potassium content is 100 ppm or less, 80 ppm or less, or 60 ppm or less, or 50 ppm or less, or 40 ppm or less.
The composition according to any one of the preceding claims wherein the calcium content is 100 ppm or less, 80 ppm or less, or 60 ppm or less, or 50 ppm or less, or 40 ppm or less.
The composition according to any one of the preceding claims wherein the composition is an aqueous composition and wherein the content of Kraft lignin is at least 80 wt %, preferably at least 90 wt %, preferably at least 95 wt %, preferably at least 99 wt %.
Dependencies are inferred from the claim text.