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Composite Ion Exchange Media for Liquid Filtration Systems

A filtration system, ion exchange resin technology, applied in the field of liquid filtration system and filter matrix and media, can solve the serious problem of media composite integrity, pressure drop and other problems

Active Publication Date: 2016-04-13
3M INNOVATIVE PROPERTIES CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Another concern with molded ion exchange resins is that the material swells when wetted as well as when exchanged (up to 90%) which can cause serious issues with the integrity of the media composite or cause pressure drop issues

Method used

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  • Composite Ion Exchange Media for Liquid Filtration Systems
  • Composite Ion Exchange Media for Liquid Filtration Systems

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0050] A weak acid cation exchange resin, Purylite C107EH+, was used as the baseline material in the experimental examples. The material is obtained from the manufacturer in bead form. Alternatively, the same resin material was ground into a fine mesh by Graver Technologies, a company that claims to have expertise in grinding resins. The powder has a median particle size of 125 microns. Greif Technologies refers to the resin ground through their process as "powder resin".

[0051]The powdered ion exchange material was dried in a convection oven at about 100°F. Mix the following materials using a drill press with an attached paddle paint mixer. (Activated carbon was added because the particular application being evaluated required some chlorine reduction. Activated carbon was optional if chlorine reduction was not required).

[0052] Material

weight%

Powder C107E

63

Ticona GUR 2126 UHMW PR powder

22

Kuraray PGWH-100MD activated ca...

example 2

[0058] contrast

[0059] Blocks were made according to Example 1 except that the compression step was omitted. The block exhibited poor strength and crumbled during handling.

example 3

[0061] Blocks were made as in Example 1 except that the blocks were heated at 155°C for 150 minutes. The 2.8" ID blocks were cut to 13" lengths and were capped. Packed beds of blocks and ion exchange beads were compared in terms of pressure drop and hardness reduction properties.

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Abstract

The present invention provides matrices and filter media comprising pulverized powders of ion exchange resins and a polymeric binder. The resin can be ground to an average particle size in the range of 50 microns to 250 microns, and can include cation exchange resins, anion exchange resins, chelating resins, biorelevant ion exchange resins, or combinations thereof. The medium may also contain activated carbon. The binder may be ultra high molecular weight polyethylene. The filter media can be used in the manufacture of substrates and systems. The invention also provides methods for its manufacture and use.

Description

technical field [0001] The present disclosure relates to liquid filtration systems and filter substrates and media, wherein the filter media include, for example, ion exchange media in particulate form, such as comminuted powders of resins. Background technique [0002] Various types of water filtration systems are commercially available. Traditionally, beds of loose carbon particles have been used to remove metals and / or organic matter from water. Composite blocks can be made from a combination of adsorptive materials (such as adsorbent activated carbon) and polymeric binders (such as ultra-high molecular weight polyethylene (UHMWPE)), which are sintered together under conditions of heat and pressure and can be used for water filter technology. Carbon block technology (for example) can provide comparable functionality to loose bed carbon particles without the particles falling out or taking up too much space. For carbon block technology, due to the increased amount of ad...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D15/04B01D15/26B01J47/00
CPCB01D15/361C02F1/001C02F1/283C02F1/42C02F5/00B01J20/20B01J20/3007B01J20/3035B01J20/28042Y10T29/49826B01J39/20B01J39/24B01J45/00B01J47/018B01J41/14B01J39/19C02F2001/427C02F2303/22
Inventor 马克·R·斯托弗
Owner 3M INNOVATIVE PROPERTIES CO