Method for treatment of substantially aqueous fluids derived from processing inorganic materials
AssigneeE. I. Du Pont de Nemours and Company
InventorRobert Harvey Moffett
Life of this patent
Estimating the term…
Abstract
A process is provided which can be used, for example, to clarify substantially aqueous fluids and separate solids from the fluid. The process comprises combining the fluid with a composition which comprises an anionic silica-based colloid having an S value of less than 50% and a cationic organic polymer.
Claims23
A process for reducing suspended particulate material in a substantially aqueous fluid, derived from inorganic material or mineral processing, comprising contacting said fluid with:
- (a) an anionic silica-based colloid having an S value of less than about 50%;
- and (b) a polymer selected from the group consisting of a cationic organic polymer, an amphoteric organic polymer, and mixtures thereof to produce a flocculated material including said suspended particulate material.
A process for reducing suspended particulate material in a substantially aqueous fluid derived from inorganic material or mineral processing, comprising:
- (a) adjusting the pH of said fluid to less than about pH 11 to produce a pH-adjusted fluid;
- (b) contacting said pH-adjusted fluid with a composition to produced a flocculated material including said suspended particulate material;
- and (c) separating said flocculated material from said pH-adjusted fluid wherein said composition comprises (1) an anionic silica-based colloid having an S value of less than about 50%;
- and (2) a polymer selected from the group consisting of cationic polyacrylamide, cationic starch, cationic guar gum, cationic chitosan, amphoteric organic polymer, and mixtures of two or more thereof.
Dependencies are inferred from the claim text.