US 11,926,966 B2
Method of increasing efficiency of chemical additives in a papermaking system
Davit Edward Sharoyan, Wilmington, DE (US); John Charles Harrington, IV, Wilmington, DE (US); Valmir Frauches de Freitas, Wilmington, DE (US); and Flávio Henrique Gazzotti Bueno de Oliveira, Wilmington, DE (US)
Assigned to SOLENIS TECHNOLOGIES, L.P., Wilmington, DE (US)
Filed by SOLENIS TECHNOLOGIES, L.P., Wilmington, DE (US)
Filed on Oct. 30, 2020, as Appl. No. 17/084,895.
Application 17/084,895 is a continuation in part of application No. 16/149,635, filed on Oct. 2, 2018, granted, now 10,876,254.
Claims priority of provisional application 62/567,524, filed on Oct. 3, 2017.
Prior Publication US 2021/0047780 A1, Feb. 18, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. D21H 17/45 (2006.01); D21H 11/04 (2006.01); D21H 11/08 (2006.01)
CPC D21H 17/455 (2013.01) [D21H 11/04 (2013.01); D21H 11/08 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A method of increasing chemical efficiency of chemical additives in a papermaking system, said method comprising the steps of:
providing thick stock pulp comprising soluble lignin, process water, and at least about 2% by weight of cellulosic fiber based on total weight of thick stock pulp, and
adding at least one organic polymer to the thick stock pulp to reduce the amount of soluble lignin therein; and
wherein the organic polymer is chosen from water dispersions of cationic polyacrylamides, water dispersions of polyethylene oxides, and combinations thereof,
wherein the cationic polyacrylamide has a molecular weight of from about 1,000,000 to about 10,000,000 Da,
wherein the polyethylene oxide has a molecular weight of greater than about 1,000,000 and less than about 10 million Da, and
wherein the organic polymer is added to the thick stock pulp in an amount of from about 0.05 to about 5 pounds per ton of oven dried pulp.