US 10,537,838 B2 · Antimicrobial composite filtering material and method for making the same

Abstract

A filter media having lignite-derived activated carbon, polyacrylic acid (PAA), a commercially available copper-zinc alloy, and polydiallyldimethylammonium chloride (PolyDADMAC) or Luviquat®, which is Poly[(3-methyl-1-vinylimidazolium chloride)-co-(1-vinylpyrrolidone)], combined and used as suitable replacement for TOG bituminous coal-based activated carbon, silver, and PolyDADMAC. Functional groups in lignite-based activated carbon interact with the polyacrylic acid. Functional groups such as calcium, iron, or aluminum oxide/hydroxide of lignite-based activated carbon interact with PAA, and help hold the PolyDADMAC in place. The additional presence of a copper-zinc alloy enhances the filter anti-microbiological performance.

Claims13

Dependent claims

A process for the production of a filter media for fluid filtration having antimicrobial properties comprising the steps of:

a) diluting polyacrylic acid in deionized water to form a diluted solution;
b) adding lignite-based powdered activated carbon to said diluted solution and blending to form a blended solution;
c) soaking said blended solution;
d) mixing a copper-zinc alloy with a wet cellulose fibrillated fiber, a heavy metal removal powder adsorbent, and a CoPET/PET polyester fiber, with said blended solution to form a resultant solution;
e) blending said resultant solution;
f) forming a paper slurry from said resultant solution;
and
g) drying said paper slurry to form said filter media.

5 more elements

Dependencies are inferred from the claim text.

Facts

Application

15/847,134Filed 19 Dec 2017 · us provisional application

Priority

20 Dec 2016

Published

US 2018/0169552 A121 Jun 2018

Granted

21 Jan 2020

Term ends

Not estimatedThe source records don’t support an estimate.

Classification24 codes

B01D 39/18
Of organic material, e.g. synthetic fibres: the material being cellulose or derivatives thereof
B01D 39/1623
The material being fibrous: of synthetic origin
C02F 1/288
By sorption: using composite sorbents, e.g. coated, impregnated, multi-layered
C02F 1/50
Treatment of water, waste water, or sewage: by addition or application of a germicide or by oligodynamic treatment

Antimicrobial composite filtering material and method for making the same

Life of this patent

Antimicrobial composite filtering material and method for making the same

Life of this patent

Abstract

Claims13