Blister protection for spiral wound elements

Details Blister protection for spiral wound elements Blister protection for spiral wound elements

2007-12-04

2007-12-04

Menon, Krishnan S. (Department: 1723)

Liquid purification or separation

Casing divided by membrane into sections having inlet

Each section having inlet

C210S321850, C210S650000, C210S652000, C156S290000, C156S325000, C156S330000, C156S334000

Reexamination Certificate

active

11015186

ABSTRACT:
A method for preventing osmotic blistering in spirally-wound elements of semipermeable membrane sheet material (14) by applying an effective coating of a sealant (41, 43, 45) to the upstream surface of such membrane material in regions where such potential for blistering exists and thereby preventing the permeation of liquid into the surface of the semipermeable membrane in these regions.

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