07393381 is referenced by 9 patents and cites 42 patents.

A plurality of different layers of filter media are used to remove siloxanes from a gas stream. Based on an analysis of the specific gas stream to be filtered, a filter media having an average pore size enabling the preferential removal of a specific class of contaminants is selected for each different class of contaminants. The layers are arranged in sequential order such that contaminants having a higher molecular weight are preferentially removed by the first layers. Collectively, the layers define a segmented activity gradient that enables each class of contaminants present in the gas stream to be preferentially removed in a different layer, preventing removal competition between different classes of contaminants. Preferable adsorption media exhibit a relatively narrow range of pore sizes. Both inorganic adsorption media and carbon-based adsorption media exhibiting a relatively narrow range of pore sizes can be used.

Title
Removing siloxanes from a gas stream using a mineral based adsorption media
Application Number
11/79459
Publication Number
7393381 (B2)
Application Date
March 8, 2005
Publication Date
July 1, 2008
Inventor
Jeffrey V Wetzel
Lake Stevens
WA, US
Paul M Tower
Snohomish
WA, US
Agent
Ronald M Anderson
Assignee
Applied Filter Technology
WA, US
IPC
B01D 53/02
View Original Source