Water clarification process

Abstract

1. A process for clarifying water which has solid materials suspended therein and which has at least 0.1 ppm of residual chlorine comprising the steps of adding a minor amount of a .Iadd.condensation .Iaddend.polymer .[..[.of ammonia and ethylene dichloride.]..]. .Badd.selected from the group consisting of ammonia and polyalkylene polyamine with epichlorohydrin, and ammonia with ethylene dichloride .Baddend.which contains a plurality of basic nitrogen sites in form of quaternary groups to said water to coagulate said suspended solids, and thereafter separating said solids from said water.

Having thus described the invention, what is claimed is: 1. A process for clarifying water which has solid materials suspended therein and which has at least 0.1 ppm of residual chlorine comprising the steps of adding a minor amount of a .Iadd.condensation .Iaddend.polymer .Iadd..[..[. of ammonia and ethylene dichloride.]..]..Iaddend. .Badd.selected from the group consisting of ammonia and polyalkylene polyamine with epichlorohydrin, and ammonia with ethylene dichloride .Baddend.which contains a plurality of basic nitrogen sites in form of quaternary groups to said water to coagulate said suspended solids, and thereafter separating said solids from said water. 2. The process of claim 1 where the polymer contains a plurality of nitrogen atoms having attached thereto 2-3 alkyl groups having from 1 to 5 carbon atoms. 3. The process of claim 2 where the alkyl group is methyl. 4. The process of claim 2 where from 0.1 to 10 p.p.m. of said polymer is added. 5. The process of claim 4 where from 0.5 to 5 p.p.m. of said polymer is added.