Vinylamine polymers for removing color from paper mill effluents
AssigneeNalco Chemical Company
InventorsJohn H. Collins, Dodd; W. Fong, Anthony G. Sommese, Amy M. Tseng
Life of this patent
Estimating the term…
Abstract
The invention comprises a process for removing true and apparent color from pulp and paper waste waters. It comprises treating these waste waters with a vinylamine polymer including from about 1 to about 100 mole percent vinylamine and from about 1 to about 99 mole percent of at least one monomer selected from the group consisting of amidine vinylformamide, vinyl alcohol, vinyl acetate, vinyl pyrrolidinone and the esters, amides, nitriles and salts of acrylic acid and methacrylic acid.
Claims7
A process for removing true and apparent color from pulp and paper waste waters which comprises treating these waste waters with a color removing amount of a unquaterized water soluble vinylamine polymer including from about 1 to about 100 mole percent vinylamine and from about 1 to about 99 mole percent of at least one monomer selected from the group consisting of amidine, vinylformamide, vinyl alcohol, vinyl acetate, vinyl pyrrolidinone and the esters, amides, nitriles and salts of acrylic acid and methacrylic acid.
Dependencies are inferred from the claim text.