Process for raw water clarification

Claim 1

A PROCESS FOR CLARIFYING RAW WATER WHICH COMPRISES TREATING SAID WATER WITH AN EFFECTIVE AMOUNT OF A WATER-DISPERSIBLE POLYQUATERNARY POLYMER OF ESSENTIALLY LINEAR STRUCTURE COMPRISING THE DIFUNCTIONAL REACTION PRODUCT OF DIMETHYLAMINE AND A DIFUNCTIONAL EPOXY COMPOUND SELECTED FROM THE GROUP CONSISTING OF EPIHALOHYDRINS AND PRECURSORS OF EPIHALOHYDRINS WHICH UNDER ALKALINE CONDITIONS ARE READILY CONVERTED INTO THE CORRESPONDING EPOXY COMPOUNDS, AND MIXTURES THEREOF, SAID POLYQUATERNARY COMPOUND CONTAINING REPEATING UNITS OF -N(+)(-R)(-R2)-E-X(-) WHEREIN R AND R2 ARE EACH METHYL, E IS A RESIDUE OBTAINED FROM SAID EPOXY COMPOUND, THE TOTAL AMOUNTS OF REACTANTS BEING SUBSTANTIALLY EQUIMOLAR, THE COMBINATION OF WHICH IS SUCH AS TO PROVIDE A POLYQUATERNARY COMPOUND WHICH AS A 37% AQUEOUS SOLUTION, BY WEIGHT, BASED ON THE CATIONIC PORTION OF SAID POLYQUATERNARY COMPOUND HAS A VISCOSITY AT 25*C. OF AT LEAST 100 CENTISTOKES, AND X-REPRESENTS AN ANION FORMING THE ANIONIC PORTION OF SAID POLYQUATERNARY, AND THEREAFTER RECOVERING THE CLARIFIED WATER.