ALEXANDRIA, Va., Oct. 8 -- United States Patent no. 12,434,976, issued on Oct. 7, was assigned to Solvay SA (Brussels).
"Process for treating a sodium carbonate purge" was invented by Alain Vandendoren (Wezembeek-Oppem, Belgium).
According to the abstract* released by the U.S. Patent & Trademark Office: "A method for producing a concentrated aqueous sodium hydroxide solution from a purge stream deriving from a sodium carbonate, or sesqui-carbonate, or wegsheiderite crystallizer, or sodium bicarbonate crystallizer, said purge stream comprising sodium carbonate and/or bicarbonate, and at least 1% of sodium chloride or sodium sulfate and a soluble impurity from an ore deposit comprising at least one of the following elements: As, Ba, B, Ca, ...