Pall Corporation

Jeffrey K Chambers

Thomas C Gsell

Peter J Degen

Isaac Rothman

John R Gerringer

Paul C Smith, Iii

A system and method for removing contaminants in a fluid, particularly water from lubricating oil, is provided which may comprise a particulate zeolitic adsorbent in conjunction with a non-porous PTFE barrier that has been modified to be permeable to water and impermeable to oil. Such a system is capable of reducing the level of water in lubricating oil to less than 100 parts per million.

Contaminant removal system and process

A filter medium is provided comprising a fibrous matrix to whose surfaces is grafted a superstrate comprising a polymer with quaternary ammonium groups and made from an ethylenically unsaturated monomer containing a quaternary ammonium or amino group, the filter medium having a positive zeta potential at pH 7 and preferably an enhanced Latex Adsorption Capacity together with low extractables and quick rinse-up.

Polymeric microfiber filter medium

Microporous membranes having positive zeta potentials in alkaline pH are provided by radiation grafting diallyldimenthylammonium dimethyl ammonium chloride to the surraces of a microporous, polyamide membrane using ionizing radiation. The membranes have particular use in microelectronics manufacture where quick rinse up times with ultrapure water are required.

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Huntington, NY, United States of America

Jeffrey K Chambers