04902417 is referenced by 46 patents and cites 8 patents.

Disclosed are spiral-wound membrane cartridge constructions for use in ultrafiltration and reverse-osmosis separation equipment, each of which include a feed layer, a membrane layer and a permeate carrier layer. By using a feed layer in the form of a channel material having a plurality of parallel ribs extending in an axial direction, interconnected by a matrix of smaller filaments which may be generally perpendicular thereto, this construction advantageously reduces resistance to liquid frlow axially through the cartridge, registering only very low pressure drops. Such cartridges of 40 to 70 inches in length and 8 inches in diameter may be employed in series, even within a single outer casing or pressure vessel. Such constructions are especially useful in separating liquids having high levels of particulate contamination using ultrafiltration membranes where clogging of the cartridge is a common problem and also in concentrating solutions of fairly viscous water-soluble polymers.

Title
Spiral-wound membrane cartridge with ribbed and spaced carrier layer
Application Number
7/206560
Publication Number
4902417
Application Date
June 14, 1988
Publication Date
February 20, 1990
Inventor
Larry A Lien
Solana Beach
CA, US
Agent
Fitch Even Tabin & Flannery
Assignee
Desalination Systems
CA, US
IPC
B01D 13/00
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