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US 4,288,462 AGranted
Method for removing cationic contaminants from beverages
AssigneeAMF Incorporated
InventorsKenneth C. Hou, Eugene A. Ostreicher
Life of this patent
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Abstract
Process for production of anionically charged filter media sheet including pretreatment of filter elements with cationic charge modifier, preferably employing inorganic colloidal silica charge modifiers. The resulting filters are used for the removal of haze or haze formers from beverages.
Claims8
A process for the removal of haze or haze formers which are cationic submicronic proteinaceous contaminants from a beverage, comprising conducting a beverage containing such contaminants through a filter media having an anionic electrokinetic capture potential for such contaminants, the filter media being prepared by:
- a. treating filter elements selected from the group consisting of cellulose pulp and particulate filter aids with an amount of inorganic cationic colloidal silica surface charge modifier to render the surface of the filter elements receptive to the subsequent deposition of an inorganic anionic colloidal silica charge modifier, thereafter,
- b. charge modifying the treated filter elements with an inorganic anionic colloidal silica charge modifier, and
- c. forming the filter elements into a sheet having a negative zeta potential and a wet strength of at least 2.5 kg/in.
Dependencies are inferred from the claim text.