US Patent Issued to DUPONT SAFETY & CONSTRUCTION on March 17 for "Concentration of sulfuric acid" (Minnesota, Delaware Inventors)

ALEXANDRIA, Va., March 17 -- United States Patent no. 12,577,104, issued on March 17, was assigned to DUPONT SAFETY & CONSTRUCTION INC. (Wilmington, Del.).

"Concentration of sulfuric acid" was invented by Tirtha Chatterjee (Wilmington, Del.) and Steven Jons (Edina, Minn.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A method for fractionating a sulfuric acid process stream having at least 1 wt % sulfuric acid, using a treatment system comprising three filtration assemblies each having membranes that are suitable to pass less than 10% salt in a standard test such that average passage of sulfuric acid from the first and third filtration assemblies is less than 30% and average passage of sulfuric acid from sec...