METHOD OF MAKING POLYMERS CONTAINING HYDROXAMATE FUNCTIONAL GROUPS

摘要

A process is disclosed for the formation of highly anionic hydroxamic acid polymers whereby (meth)acrylic acid polymers are esterified in aqueous solution to poly(meth)acrylates. The resultant polymers are then reacted with an hydroxylamine to produce hydroxamated (meth)acrylic acid containing polymers. The esterified polymers, their hydroxamated derivatives and their use to flocculate Bayer Process streams are also disclosed.