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US4663052A
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Drying process using chabazite-type adsorbents
Assignee: Katalistiks International Inc
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Filing: 1985-12-12
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Granted: 1987-05-05
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Expires: 2005-12-12
Abstract
Abstract A process for the removal of water and other polar compounds from an acidic stream containing water and at least one acid compound comprising contacting the acidic stream with an adsorbent comprising a chabazite-type zeolite wherein said adsorbent has a M 2 O/Al 2 O 3 mole oxide ratio of at least 0.5 where "M" is at least one cation selected from the group consisting of potassium, rubidium and cesium.
Inventors
- 👤 John D. Sherman
- 👤 Moez M. Nagji
- 👤 Ronald J. Ross
- 👤 Joseph P. Ausikaitis
- 👤 Desh R. Garg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:16
CPC Classifications
B; B01; B01J; B01J20/00; B01J20/02; B01J20/10; B01J20/16; B01J20/18; B01J20/186
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
84 words
The process for the removal of water from an acidic stream containing one or more acid compounds and water wherein said process comprises contacting said acidic stream with an adsorbent under effective conditions for the adsorption of water wherein said adsorbent comprises an effective amount of a chabazite-type zeolite wherein said adsorbent has a M 2 O/Al 2 O 3 mole oxide ratio of at least 0.5 where "M" is at least one cation selected from the group consisting of potassium, rubidium or cesium.
Claim 2
Dependent Claim
84 words
The process for the removal of water from an acidic stream containing one or more acid compounds and water wherein said process comprises contacting said acidic stream with an adsorbent under effective conditions for the adsorption of water wherein said adsorbent comprises an effective amount of a chabazite-type zeolite wherein said adsorbent has a M 2 O/Al 2 O 3 mole oxide ratio of at least 0.5 where "M" is at least one cation selected from the group consisting of potassium, rubidium or cesium.
Claim 3
Dependent Claim
20 words
The process of claim 1 wherein the M 2 O/Al 2 O 3 mole oxide ratio is at least 0.6.
Claim 4
Dependent Claim
17 words
The process of claim 2 wherein the M 2 O/Al 2 O 3 is at least 0.7.
Claim 5
Dependent Claim
25 words
The process of claim 2 wherein said adsorbent has been activated at a temperature of about 100° C. or greater in the presence of air.
Claim 6
Dependent Claim
30 words
The process of claim 1 wherein said chabazite-type zeolite is at least one zeolite selected from the group consisting of chabazite, erionite, levynite, zeolite D, zeolite R and zeolite K-G.
Claim 7
Dependent Claim
11 words
The process of claim 5 wherein said chabazite-type zeolite is chabazite.
Claim 8
Dependent Claim
9 words
The process of claim 1 where "M" is potassium.
Claim 9
Dependent Claim
29 words
The process of claim 7 wherein said chabazite-type zeolite is chabazite, said M 2 O/Al 2 O 3 mole oxide ratio is at least 0.7 and "M" is potassium.
Claim 10
Dependent Claim
21 words
The process of claim 1 wherein one or more polar compounds are removed from said acidic stream with removal of water.
Claim 11
Dependent Claim
28 words
The process of claim 9 wherein said polar compound is at least one polar compound selected from the group consisting of HCl, CO 2 and NH 3 .
Claim 12
Dependent Claim
15 words
The process of claim 1 wherein said acidic stream comprises at least one halogenated hydrocarbon.
Claim 13
Dependent Claim
21 words
The process of claim 11 wherein said halogenated hydrocarbon is selected from the group consisting of halogenated methane and ethane derivatives.
Claim 14
Dependent Claim
15 words
The process of claim 1 wherein said acidic stream comprises at least one oxygenated hydrocarbon.
Claim 15
Dependent Claim
25 words
The process of claim 13 wherein said oxygenated hydrocarbon is selected from the group consisting of alcohols, ethers, aldehydes, organic acids, ketones and mixtures thereof.
Claim 16
Dependent Claim
19 words
The process of claim 1 wherein said adsorbent comprises at least 30 percent by weight of said chabazite-type zeolite.
Claim 17
Dependent Claim
19 words
The process of claim 15 wherein said adsorbent comprises at least 80 percent by weight of said chabazite-type zeolite.
Claim 18
Dependent Claim
21 words
The process of claim 1 wherein said adsorbent contains between about 5 and about 25 percent by weight inorganic oxide binder.
Claim 19
Dependent Claim
33 words
The process of claim 1 wherein said effective conditions are an effective temperature between about 0° C. and about 300° C. and an effective pressure between about 14.7 psia and about 2000 psia.
Claim 20
Dependent Claim
13 words
The process of claim 1 wherein said acidic stream is a gaseous stream.
Claim 21
Dependent Claim
13 words
The process of claim 1 wherein said acidic stream is a liquid stream.
Claim 22
Dependent Claim
36 words
The process of claim 1 wherein said acidic stream is selected from the group consisting of reformer recycle hydrogen, generated nitrogen, natural gas, flue gas, chloroform, trichloroethylene, vinyl chloride, chlorine, organic acids, fluorocarbons and generated hydrogen.
Claim 23
Dependent Claim
19 words
The process of claim 21 wherein said adsorbent comprises at least 70 percent by weight of said chabazite-type zeolite.
Claim 24
Dependent Claim
11 words
The process of claim 21 wherein said chabazite-type zeolite is chabazite.
Claim 25
Dependent Claim
16 words
The process of claim 21 wherein said chabazite-type zeolite is a mixture of chabazite and erionite.
Claim 26
Dependent Claim
82 words
The process for the removal of water from a gaseous stream comprising methyl chloride and water wherein said process comprises contacting said gaseous stream at an effective temperature between about 50° C. and about 250° C. and at an effective pressure between about 14.7 psia and about 500 psia with an adsorbent comprising at least 40 weight percent of at least one chabazite-type adsorbent wherein said adsorbent has a K 2 O/Al 2 O 3 mole oxide ratio of at least 0.6.
Claim 27
Dependent Claim
82 words
The process for the removal of water from a gaseous stream comprising methyl chloride and water wherein said process comprises contacting said gaseous stream at an effective temperature between about 50° C. and about 250° C. and at an effective pressure between about 14.7 psia and about 500 psia with an adsorbent comprising at least 40 weight percent of at least one chabazite-type adsorbent wherein said adsorbent has a K 2 O/Al 2 O 3 mole oxide ratio of at least 0.6.
Claim 28
Dependent Claim
17 words
The process of claim 25 wherein the K 2 O/Al 2 O 3 is at least 0.7.
References Cited (Backward Citations)
US3224167A
Cited
US3720041A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-05-04 | 1990-11-03 | 1991-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-05-04 | 1994-11-03 | 1995-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-05-04 | 1998-11-03 | 1999-05-05 | $7700.00 | Window Closed / Lapsed |