Patent ID: 11926534
Assignee: THE PROCTER & GAMBLE COMPANY
Field: Chemical engineering (Chemistry)
Classification: CPC B  C | IPC B  C

Claim 0:
1. A method of reducing the amount of a chemical contaminant in a composition, comprising;
a) providing an initial feed supply comprising a composition comprising an active and a chemical contaminant comprising 1,4-dioxane; dimethyl dioxane; diethylene oxide sulfate; or a combination thereof; and, optionally, a solvent;
b) providing a nanofilter;
c) filtering the initial feed supply through the nanofilter to form a retentate comprising at least a portion of the active and a filtrate comprising at least a portion of the chemical contaminant and at least a portion of the solvent; and
d) subjecting the filtrate to reverse osmosis to form a reverse osmosis permeate and a reverse osmosis concentrate comprising at least a portion of the chemical contaminant.