Catalyst – solid sorbent – or support therefor: product or process – Solid sorbent – Free carbon containing
Patent
1990-08-30
1992-03-24
Konopka, Paul E.
Catalyst, solid sorbent, or support therefor: product or process
Solid sorbent
Free carbon containing
55 68, 55 74, 55 75, 264 295, 423445, 423460, 502416, 502417, 502437, B01J 2020, C01B 3100, B01D 5302
Patent
active
050988808
ABSTRACT:
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.
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Armor John N.
Cabrera Alejandro L.
Farris Thomas S.
Gaffney Thomas R.
Air Products and Chemicals Inc.
Konopka Paul E.
Marsh William F.
Rodgers Mark L.
Simmons James C.
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