US 12,331,461 B2
Black liquor viscosity reducing and anti-scale agent
Luiz Wanderley Bratfisch Pace, Campinas (BR); and Prasad Yogendra Duggirala, Naperville, IL (US)
Assigned to Ecolab USA Inc., St. Paul, MN (US)
Filed by ECOLAB USA Inc., St. Paul, MN (US)
Filed on Jan. 17, 2024, as Appl. No. 18/415,175.
Application 18/415,175 is a division of application No. 16/941,931, filed on Jul. 29, 2020, granted, now 11,905,655.
Claims priority of provisional application 62/894,432, filed on Aug. 30, 2019.
Prior Publication US 2024/0150961 A1, May 9, 2024
Int. Cl. D21C 11/10 (2006.01); D21C 3/22 (2006.01); D21C 9/00 (2006.01); D21C 11/00 (2006.01)
CPC D21C 11/106 (2013.01) [D21C 3/226 (2013.01); D21C 9/008 (2013.01); D21C 11/0092 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A composition, comprising:
a carboxylate-containing polymer, wherein the carboxylate-containing polymer is a polymer comprising a polyacrylate or a combination of a polymer comprising a polyacrylate and a polymer comprising a sulfonate and a nonionic monomer;
an inorganic salt comprising a bisulfite salt;
a surfactant, and
a black liquor.
 
11. A composition, comprising:
a black liquor;
a carboxylate-containing polymer, wherein the carboxylate-containing polymer is a polymer comprising a polyacrylate or a combination of a polymer comprising a polyacrylate and a polymer comprising a sulfonate and a nonionic monomer; and
an inorganic salt comprising a bisulfite salt.