05098880 is referenced by 16 patents and cites 6 patents.

A process is provided for making a modified carbon molecular sieve which is suitable for separating gases having different adsorption rates on the sieve. The process involves modifying a starting sieve support having a majority of micropores with an effective pore size of about 4.5 to 8 angstroms, with a two-step process in which the sieve is contacted with two different volatile carbon-containing organic compounds, preferably hydrocarbons, which have different molecular dimensions. The compound used in the first step is larger than that in the second step, so that the pore openings of the micropores of the support are narrowed successively in two distinct steps without filling the micropores themselves. The invention also discloses an improved carbon molecular sieve and the separation of gases, such as oxygen from nitrogen, by the use of this improved adsorbent.

Title
Modified carbon molecular sieves for gas separation
Application Number
7/575474
Publication Number
5098880
Application Date
August 30, 1990
Publication Date
March 24, 1992
Inventor
John N Armor
Orefield
PA, US
Alejandro L Cabrera
Fogelsville
PA, US
Thomas S Farris
Bethlehem
PA, US
Thomas R Gaffney
Allentown
PA, US
Agent
James C Simmons
William F Marsh
Mark L Rodgers
Assignee
Air Products and Chemicals
PA, US
IPC
B01D 53/02
C01B 31/00
B01J 20/20
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