Cationic and anionic lignin amines
AssigneeWestvaco Corporation
InventorsPeter Schilling, Patti E. Brown
Life of this patent
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Abstract
Lignin amines are disclosed which are characterized by high nitrogen content and are water soluble at both alkaline and acidic pH values. The lignin amines have utility as flocculants, filtration aids, precipitants, scale inhibitors, asphalt emulsifiers, fluid loss additives, oil well cement additives, corrosion inhibitors, retention aids, cationic dispersants, and tall oil pitch emulsifiers.
Claims11
An improved lignin derivative consisting essentially of the reaction product of lignin with an aldehyde, or an aldehyde-producing substance, and a polyamine wherein said lignin derivative is water soluble at alkaline and acidic pH values.
Dependencies are inferred from the claim text.