Back to results
US 11,905,655 B2Granted
Black liquor viscosity reducing and anti-scale agent
AssigneeEcolab USA Inc.
InventorsLuiz Wanderley Bratfisch Pace, Prasad Yogendra Duggirala
Life of this patent
Estimating the term…
Abstract
The disclosure provides methods and compositions for reducing the viscosity of black liquor. Also provided are methods of inhibiting deposition of scale and methods of processing black liquor. In some embodiments, the compositions include a carboxylate-containing polymer and an inorganic salt. In some embodiments, the compositions include a carboxylate-containing polymer, an inorganic salt, and a surfactant.
Claims8
A method of reducing a viscosity of a black liquor, comprising:
- adding an effective amount of a composition to the black liquor, and
- reducing the viscosity of the black liquor, wherein the composition
- comprises an inorganic salt 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, polymer comprising sulfonate and a nonionic monomer, a polymer comprising a polyacrylate and a phosphonate, and any combination thereof.
2 more elements
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.
3 more elements
Dependencies are inferred from the claim text.