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Coated filter membranes, filter cartridges, filters and methods for using and making coated filter membranes

A filter membrane, coating technology, applied in the field of coated filter membrane, filter cartridge, filter and use and preparation of coated filter membrane

Pending Publication Date: 2019-11-05
ENTEGRIS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These methods require solvents that have very high levels of purity and therefore must be filtered using very effective filtration systems

Method used

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  • Coated filter membranes, filter cartridges, filters and methods for using and making coated filter membranes
  • Coated filter membranes, filter cartridges, filters and methods for using and making coated filter membranes
  • Coated filter membranes, filter cartridges, filters and methods for using and making coated filter membranes

Examples

Experimental program
Comparison scheme
Effect test

example

[0080] porosimetry bubble point

[0081] Porosimetry The bubble point test method measures the pressure required to push air through the wetted pores of a membrane. The bubble point test is a well known method for determining the pore size of a membrane.

[0082] flow rate measurement

[0083] The isopropanol (IPA) flow rate was determined by cutting the membrane into 47mm discs and wetting the discs with IPA before placing the discs in the filter holder and reservoir to maintain the volume of IPA. Connect the reservoir to the pressure regulator. IPA was flowed through the membrane at a differential pressure of 14.2 psi (pounds per square inch). After steady state was achieved, the time for 10 ml of IPA to flow through the membrane was recorded.

example 1

[0085] This example describes the preparation of a 14% by weight polyamide stock solution. In a round bottom flask equipped with a stir bar and condenser, 14 grams of Ultramid 1C (BASF) resin was added to 86 g of 1-propanol (Sigma) / deionized water mixture. The latter was prepared by mixing 20 ml of deionized water with 80 ml of 1-propanol. The mixture was heated at reflux for 10 hours until all the resin was dissolved. The resulting solution was clear and free of undissolved solids.

example 2

[0087] This example describes the preparation of a polyamide coating solution.

[0088] A solution was made to contain 2 g of benzophenone (Sigma), 28.57 g of the stock solution prepared in Example 1 and 69.43 g of a propanol:water mixed solution (80:20% by volume). Complete dissolution of the benzophenone occurred after an additional 30 minutes of mixing.

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Abstract

The application relates to a coated filter membranes, filter cartridges, filters, and methods for using and making coated filter membranes. Described are filter membranes coated with a polyamide, filters and filter cartridges that include the filter membranes, and methods of using and making the filter membranes.

Description

technical field [0001] The following description relates to filtration membranes comprising porous polymeric filtration layers coated with a layer comprising a cross-linked polyamide polymer; to methods of making coated filtration membranes, filtration assemblies, and filters; and to using coated filtration membranes , filter assembly or filter A method of filtering a fluid, such as a liquid chemical, to remove unwanted materials from the fluid. Background technique [0002] Filtration membranes and filter products are essential tools of the modern industry for the removal of unwanted materials from serviceable fluid streams. Suitable fluids for treatment using filters include water, liquid industrial solvents and process fluids, industrial gases used in manufacturing or processing (eg, semiconductor manufacturing), and liquids with medical or pharmaceutical uses. Undesired materials removed from the fluid include impurities and contaminants such as particles, microorganism...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/82B01D71/56B01D67/00B01D61/00C02F1/44
CPCB01D71/82B01D71/56B01D67/0002B01D61/00C02F1/44B01D69/125B01D69/107B01D2325/0283B01D71/261B01D69/1216B01D71/262B01D69/02B01D2323/30B01D67/0006B01D2325/04B01D67/0088B01D69/1213B01D67/0016B01D2325/027B01D2323/34
Inventor J·A·贾比尔K·S·郑S·李
Owner ENTEGRIS INC