Abstract: Aqueous glycol compositions containing conventional corrosion inhibitors are improved by the addition of a .beta.-dicarbonyl compounds having the formulaR.sub.1 -C(O)-C(R.sub.2)(R.sub.3)-C(O)-R.sup.4whereR.sub.1 and R.sub.4 are independently alkyl groups of 1-4 carbons, and alkoxy groups, of 1-4 carbons,R.sub.2 and R.sub.3 are hydrogen, hydroxyl, alkyl groups of 1-4 carbons, or acetyl groups, with the proviso that R.sub.1 and R.sub.2 can be joined to form a 5 or 6 membered ring when R.sub.3 is hydrogen and R.sub.4 is an alkyl group of 1-4 carbons,with the proviso that R.sub.1 and R.sub.4 can be joined to form a 5 membered ring when R.sub.2 is hydrogen and R.sub.3 is an alkyl group of 1-4 carbons, with the proviso that R.sub.1 and R.sub.4 can be joined to form the 1,2-phenylene group when R.sub.2 and R.sub.3 are hydrogen, andwith the proviso that R.sub.1 and R.sub.4 can be joined to form the 1,2 phenylene group when R.sub.2 is hydroxyl and R.sub.3 is the 2-hydroxy 1,3-dione-indanyl-2 group.

Abstract: This invention relates to a water soluble quaternized epihalohydrin copolymer. The copolymer is prepared by first reacting an epihalohydrin with a polyepoxide in an organic solvent in the presence of a polymerization catalyst. The copolymer thus produced is then quaternized by reacting it with a tertiary amine. The quaternized epihalohydrin copolymer is useful in removing suspended solids from aqueous dispersions. It is particularly useful in processes for clarifying raw water.