Patent ID: 6120690
Filing Date: 2000-09-19
Classification: C02F

Abstract:
A process for clarification of water of raw alkalinity less than or equal to 50 ppm by chemical treatment, said process comprising:adding to the water and, prior to or after adding to the water, blending at least one aluminum polymer with a high molecular weight quaternized ammonium polymer in an amount sufficient to form a flocculated suspension in the water and to remove turbidity from the water, said high molecular weight quaternized ammonium polymer comprising at least an effective amount ofhigh molecular weight di-allyl di-methyl ammonium chloride (DADMAC) having a molecular weight of at least approximately 1,000,000 to approximately 3,000,000 andsaid aluminum polymer including at least an effective amount of poly-aluminum hydroxychloride of a basicity equal to or greater than 50%.