Guanidine-based polymers for separation processes

摘要

Cationic polymers and methods for using the same are provided. The method can include contacting an aqueous medium with a cationic polymer. The cationic polymer can include a polymer formed by reacting an aldehyde, and optionally an aldehyde-reactive compound, in the presence of a sufficient amount of guanidine to provide the polymer with a net cationic charge.

主权项

1. A method for separating negatively charged material from an aqueous slurry, comprising:
reacting a monomer mixture comprising one or more aldehydes, one or more phenolic compounds, and a sufficient amount of a guanidine salt to form a polymer having a net cationic charge, wherein the one or more aldehydes comprise formaldehyde, wherein the guanidine salt comprises guanidine carbonate, guanidine chloride, guanidine nitrate, or any mixture thereof, and wherein the monomer mixture is reacted at a temperature of about 30° C. to about 100° C. for a time period of about 15 minutes to about 3 hours to form the polymer having the net cationic charge; contacting an aqueous slurry comprising a negatively charged material with the polymer having the net cationic charge; and separating the negatively charged material from the aqueous slurry, wherein the negatively charged material has a reduced concentration of at least one other material relative to the aqueous slurry.