Patent ID: 9403703
Filing Date: 2016-08-02
CPC Classification: C02F,C08G,C08L

Claim Text:
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.