Process for extraction of lignin
First Claim
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1. PROCESS OF EXTRACTING LIGNIN FROM HYDROLYZED LIGNOCELLULOSE MATERIAL WHICH COMPRISES SLURRYING SAID MATERIAL WITH A FORMIC ACID-WATER AZEOTROPE AT A TEMPERATURE OF ABOUT THE BOILING POINT OF THE AZEOTROPE, DISTILLING THE AZEOTROPE FROM SAID MATERIAL, RECOVERING THE LIGNIN FROM THE AZEOTROPE, AND REUSING THE AZEOTROPE TO EXTRACT LIGNIN FROM ADDITIONAL LIGNOCELLULOSE MATERIAL.
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1 Claim
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1. PROCESS OF EXTRACTING LIGNIN FROM HYDROLYZED LIGNOCELLULOSE MATERIAL WHICH COMPRISES SLURRYING SAID MATERIAL WITH A FORMIC ACID-WATER AZEOTROPE AT A TEMPERATURE OF ABOUT THE BOILING POINT OF THE AZEOTROPE, DISTILLING THE AZEOTROPE FROM SAID MATERIAL, RECOVERING THE LIGNIN FROM THE AZEOTROPE, AND REUSING THE AZEOTROPE TO EXTRACT LIGNIN FROM ADDITIONAL LIGNOCELLULOSE MATERIAL.
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Current AssigneeJames H. Richmond, Robert M. Boehm, Roy Hunt Harold
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Original AssigneeJames H. Richmond, Robert M. Boehm, Roy Hunt Harold
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InventorsRichmond, James H., Boehm, Robert M., ROY HUNT HAROLD
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Application NumberUS03/127,092Time in Patent Office1,338 DaysField of SearchUS Class Current530/507CPC Class CodesC08H 6/00 Macromolecular compounds de...
