Patent ID: 11905655
Assignee: ECOLAB USA INC.
Field: Textile and paper machines (Mechanical engineering)
Classification: CPC D | IPC D

Claim 6:
7. A method of inhibiting scale deposition on a surface of an evaporator, comprising:
adding an effective amount of a composition to a black liquor,
contacting the surface of the evaporator with the black liquor, and
inhibiting scale deposition on the surface, wherein the composition
comprises an inorganic salt, a surfactant, and a carboxylate-containing polymer,
wherein the inorganic salt comprises a bisulfite salt, and
wherein the carboxylate-containing polymer is selected from the group consisting of a polyacrylate, a polymer comprising sulfonate and a nonionic monomer, a polymer comprising a polyacrylate and a phosphonate, and any combination thereof.