US Patent Issued to RG DISPERSANTS on Sept. 29 for "Process of making sulfonated lignin-based compositions, sulfonated lignin-based compositions so-obtained and their use" (Canadian Inventors)

ALEXANDRIA, Va., Sept. 30 -- United States Patent no. 12,747,259, issued on Sept. 29, was assigned to RG DISPERSANTS LTD. (Candiac, Canada).

"Process of making sulfonated lignin-based compositions, sulfonated lignin-based compositions so-obtained and their use" was invented by Francis Loiseau (Saint-Hubert, Canada), Mario Dupuis (Greenfield Park, Canada) and Iordana Triantafillu (Brossard, Canada).

According to the abstract* released by the U.S. Patent & Trademark Office: "Process for preparing a composition comprising a sulfonated lignin, including: preparing a lignin-containing aqueous suspension having a solids content up to about 45 wt % and a pH greater than about 6, by mixing a lignin with water; heating the aqueous suspension betwe...