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US 2024/0166534 A1Published application
Method of using nanofiltration and reverse osmosis to remove chemical contaminants
AssigneeThe Procter & Gamble Company
InventorsJustin Thomas Lydon HEDIN, Fabrizio MELI, Karunakaran NARASIMHAN
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Abstract
A method of removing chemical contaminants from a composition comprising an active, a solvent, and a contaminant can include providing an initial feed supply, wherein the initial feed supply comprises the active, the solvent, and the contaminant, wherein the contaminant can include 1,4 dioxane, dimethyl dioxane, or a combination thereof; including filtering the initial feed stock through a nanofilter.
Claims10
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;
- and
- 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;
- 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.
6 more elements
Dependencies are inferred from the claim text.