US Patent Issued to Carbon Oxytech on Dec. 23 for "Enhanced production of humic acids from coal-lignite via water-oxygen systems" (Canadian Inventors)

ALEXANDRIA, Va., Dec. 23 -- United States Patent no. 12,503,558, issued on Dec. 23, was assigned to Carbon Oxytech Inc. (Calgary, Canada).

"Enhanced production of humic acids from coal-lignite via water-oxygen systems" was invented by Nashaat N. Nassar (Calgary, Canada) and Abdallah D. Manasrah (Calgary, Canada).

According to the abstract* released by the U.S. Patent & Trademark Office: "Processes are provided for the production of humic acids from coal such as lignite, involving mixing comminuted coal solids with an aqueous alkaline solution under subcritical extraction conditions, which comprise an extraction temperature of from 25 to 50deg C.; an extraction pressure of from less than0.1 MPa to greater than0.5 MPa; a flow of an oxygen c...