The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 29, 2020
Filed:
Nov. 07, 2018
Applicant:
Ingevity South Carolina, Llc, North Charleston, SC (US);
Inventors:
Bing Wang, Mount Pleasant, SC (US);
Guigui Wan, Hanahan, SC (US);
Assignee:
INGEVITY SOUTH CAROLINA, LLC, North Charleston, SC (US);
Primary Examiner:
Int. Cl.
CPC ...
C07G 1/00 (2011.01); C08H 7/00 (2011.01);
U.S. Cl.
CPC ...
C07G 1/00 (2013.01); C08H 6/00 (2013.01);
Abstract
The present disclosure related to a method of producing a color stable, light colored lignin. The method includes: reacting a lignin composition with a hypochlorite composition having about 5% to about 70% available chlorine; and reacting the hypochlorite treated lignin with hydrogen peroxide at a concentration of about 5% to about 50% to produce the light colored lignin, wherein the lignin composition includes at least one of sulfonated lignin, lignosulfonate, or both.