Defensive Public Disclosure Statement
This document represents a dated public disclosure of an invention developed by Conner Kupferberg and assigned to Kupferberg IP Holdings LLC. A United States provisional patent application covering this chemical process has been filed. The technical substance is published here on the open record as definitive prior art against later filers.
Non-wood agricultural black liquor (wheat straw, rice straw, bagasse) is sulfur-free when produced by mild alkaline soda routes, but precipitated crude lignin is typically heterogeneous, ash-laden, and polydisperse. The prevailing industrial solution is chemical modification with toxic alkoxides (oxypropylation). This disclosure establishes a two-stage physical pressurized fractionation process that preserves native hydroxyl chemistry while isolating reactive aromatic polyols and hard-carbon sodium battery anode precursors.