Patent · US Expired

Water treatment compositions

US6827874B2 · kind B2 · utility

27Cited by
32References
19Claims
0Family size

Assignee

Inventors

Key dates

Filing dateDec 20, 2002
Grant dateDec 7, 2004
Priority date—
Expiry dateDec 20, 2022

Classification

  • Technology area (CPC C)Chemistry; Metallurgy
  • CPC primaryC02F2305/14
  • WIPO fieldEnvironmental technology
  • WIPO sectorChemistry

Abstract

Compositions, methods and kits for purifying, clarifying nutrifying and any combination thereof, contaminated drinking water, which contain a primary coagulant material and a bridging flocculent material. The levels and ratios of coagulant to flocculent preferably fall within certain ranges. Highly preferred compositions also contain one or more of a cationic coagulant aid, especially chitosan, a microbiocidal disinfectant, a water-soluble alkali, a water-insoluble silicate, and a food additive or nutrient source.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.