EP0102902A1
Expired / Lapsed
EP
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Carbon molecular sieves and a process for their preparation
Assignee: Calgon Carbon Corp
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Filing: 1983-08-31
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Granted: —
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Expires: 2003-08-31
Abstract
Abstract process for continuously manufacturing carbon molecular sieves which comprises heating a charred substrate at a minimum temperature of 482°C for at least 5 minutes in a continuous manner and continuously collecting the sieves thus produced, wherein the furnace is initially brought to the desired temperature. A carbon molecular sieve, useful for separating gas or liquid mixtures containing components of at least two different molecular kinetic diameters which has the following physical characteristics: (a) an apparent density of from 0.60 to 0.70 g/cc, (b) an oxygen diffusivity (X 10 -8 ) of from 500 to 900 cm/sec 2 , (c) an oxygen/nitrogen selectivity ratio of from 6.5 to 8.5, (d) an oxygen capacity of from 4.00 to 6.00 cc/cc, and (e) an average effective pore diameter of about 4 Angstroms.
Inventors
- 👤 Robert F. Sutt, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-07 17:18
CPC Classifications
C; C01; C01B; C01B32/00; C01B32/30; C01B32/306
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
36 words
A process for continuously manufacturing carbon molecular sieves which comprises heating a charred substrate at a minimum temperature of 482°C for at least 5 minutes in a continuous manner and continuously collecting the sieves thus produced.
Claim 2
Dependent Claim
36 words
A process for continuously manufacturing carbon molecular sieves which comprises heating a charred substrate at a minimum temperature of 482°C for at least 5 minutes in a continuous manner and continuously collecting the sieves thus produced.
Claim 3
Dependent Claim
72 words
A process for the continuous manufacturing of carbon molecular sieves having average effective pore diameters of from 2 to 15 Angstroms which comprises continuously feeding a charred substrate to a means for heating said substrate and heating said substrate under oxygen free conditions, without the use of an externally added pore blocking substance, at a temperature range of about 482°C to 1093°C for a time period of about 5 to 90 minutes.
Claim 4
Dependent Claim
72 words
A process for the continuous manufacturing of carbon molecular sieves having average effective pore diameters of from 2 to 15 Angstroms which comprises continuously feeding a charred substrate to a means for heating said substrate and heating said substrate under oxygen free conditions, without the use of an externally added pore blocking substance, at a temperature range of about 482°C to 1093°C for a time period of about 5 to 90 minutes.
Claim 5
Dependent Claim
19 words
The process of Claim 2 wherein the heating means is an electrically fired, infrared heated continuous transport type furnace.
Claim 6
Dependent Claim
12 words
The process of Claim 2 wherein the substrate is an agglomerated substrate.
Claim 7
Dependent Claim
11 words
The process of Claim 2 wherein the substrate is coconut char.
Claim 8
Dependent Claim
16 words
The process of Claim 2 wherein the oxygen free conditions are less than 100 ppm oxygen.
Claim 9
Dependent Claim
74 words
The process of Claim 2 for the continuous manufacturing of carbon molecular sieves having an average effective pore diameter of about 4 Angstroms which further comprises continuously feeding a.charred substrate to a means for heating said substrate and heating said substrate under oxygen free conditions, without the use of an externally added pore blocking substance, at a temperature range of about 927°C to 1093°C for a time period of about 5 to 90 minutes.
Claim 10
Dependent Claim
11 words
The process of Claim 8 wherein the substrate is coconut char.
Claim 11
Dependent Claim
84 words
A carbon molecular sieve, useful for separating gas or liquid mixtures containing components of at least two different molecular kinetic diameters which has the following physical characteristics: (a) an apparent density of from 0.60 to 0.70 g/cc, (b) an oxygen diffusivity (X 10 -8 ) of from 500 to 900 cm/sec 2 , (c) an oxygen/nitrogen selectivity ratio of from 6.5 to 8.5 (d) an oxygen capacity of from 4.00 to 6.00 cc/cc, and (e) an average effective pore diameter of about 4 Angstroms.
Claim 12
Dependent Claim
84 words
A carbon molecular sieve, useful for separating gas or liquid mixtures containing components of at least two different molecular kinetic diameters which has the following physical characteristics: (a) an apparent density of from 0.60 to 0.70 g/cc, (b) an oxygen diffusivity (X 10 -8 ) of from 500 to 900 cm/sec 2 , (c) an oxygen/nitrogen selectivity ratio of from 6.5 to 8.5 (d) an oxygen capacity of from 4.00 to 6.00 cc/cc, and (e) an average effective pore diameter of about 4 Angstroms.
Claim 13
Dependent Claim
51 words
A carbon molecular sieve of Claim 10 which has the following physical characteristics: (a) an apparent density of from 0.64 to 0.70 g/cc, (b) an oxygen diffusivity ' (X 10 -8 ) of from 650 to 750 cm/sec 2 , and (c) an oxygen/nitrogen selectivity ratio of from 7 to 7.5.
References Cited (Backward Citations)
FR2134965A5
Cited
FR2215997A1
Cited
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