WATER-ABSORBENT AGENTS FOR LOW PH APPLICATIONS

摘要

This invention is directed to a process for absorbing water in the form of an aqueous medium having a pH of less than 4. The process comprises contacting said aqueous medium with a water-swellable polymer comprising an alkali metal sulphonic acid salt containing polyelectrolyte which is crosslinked in an amount sufficient to provide swellability to said polyelectrolyte. For example, a crosslinked polymer containing polymerized acrylamide and sodium 2-acrylamide-2-methylpropane sulfonate can be used to remove acidic water from, for example, fuels, battery casings.