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US 2022/0017754 A1Published application
Carbon black from biomass
AssigneeNorse Biotech AS
InventorRay W Chrisman
Life of this patent
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Abstract
A process for making carbon black is described by pyrolizing unsulfonated lignin or by pyrolizing aromatic monomers formed by hydrolyzing a biomass comprising unsulfonated lignin.
Claims10
A process for making carbon black by pyrolizing unsulfonated aromatic lignin monomers.
A process for making carbon black by:
- (a) exposing biomass comprising natural lignin to pressurized water heated to a temperature above 100° C. to depolymerize the lignin to comprise aromatic monomers and some residual oligomers;
- and (b) pyrolizing the aromatic monomers to form carbon black.
A process for preparing carbon black which comprises:
- a. separating the natural lignin polymer from the biomass using pressurized water at a temperature of about 160° C.;
- b. separating the hemicellulose which is mostly converted to monomers from the solids;
- c. heating the solids to a higher temperature to liquefy the lignin polymer while still not dissolving the cellulose;
- d. separating the melted lignin polymer from the biomass to retain the cellulose solids;
- e. maintaining the lignin in pressurized water at a temperature of about 170° C. for a sufficient time to hydrolyze the lignin to monomers;
- f. flashing off the water and drying the monomers;
- and
- g. feeding the dried monomers into a high temperature reactor to form the carbon black.
5 more elements
Dependencies are inferred from the claim text.