Patent ID: 11884563
Assignee: BOARD OF SUPERVISORS OF LOUISIANA STATE UNIVERSITY AND AGRICULTURAL AND MECHANICAL COLLEGE
Field: Environmental technology (Chemistry)
Classification: CPC C  B  E  Y | IPC B  C  E

Claim 0:
1. A process for removing oil from an oil-contaminated plastic, comprising extracting at least some oil from the oil-contaminated plastic with an aqueous composition comprising water, an electrolyte, and lignin; wherein:
(a) the composition has a pH between 2 and 6;
(b) the electrolyte is dissolved in the water at a concentration between 0.1 molal and 3.0 molal;
(c) the lignin is between 0.01% and 10.0% of the composition by mass; wherein at least some of the lignin is suspended in the aqueous composition as particulates, as colloids, or as both; and
(d) most of the lignin by mass takes the form of floccules at the pH and electrolyte concentration of the composition.