US5316998A
Expired / Lapsed
US
⏱️ 0.0 years remaining
HCl adsorbent and method for making and using same
Assignee: ALMATIS AC Inc
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Filing: 1992-05-05
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Granted: 1994-05-31
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Expires: 2012-05-05
Abstract
Abstract An HCl adsorbent, and method of making and using the adsorbent, the adsorbent comprising an activated alumina promoted with an alkali metal in an amount such that if calculated as alkali metal oxide, the adsorbent contains at least about 5% by weight alkali metal oxide.
Inventors
- 👤 John S. Lee
- 👤 Michael J. Pearson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 11:45
CPC Classifications
B; B01; B01J; B01J20/00; B01J20/02; B01J20/06; B01J20/08; B01D; B01D53/00; B01D53/34; B01D53/46; B01D53/68; B01J20/04; B01J20/041; B01J20/28; B01J20/28002; B01J20/28011; B01J20/28054; B01J20/28069; B01J20/28078; B01J20/30; B01J20/3078; B01J20/32; B01J20/3202; B01J20/3204; B01J20/3231; B01J20/3234; B01J20/3236; C; C01; C01B; C01B7/00; C01B7/01
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
161 words
A promoted adsorbent for removing HCl from fluid streams comprising: activated alumina, and an alkali metal promoter, said alkali metal promoter being derived from a water soluble, alkali metal salt of a carboxylic acid containing from 1 to 6 carbon atoms heat treated with said alumina at a temperature of about 300° to about 555° C. for about 10-60 minutes and present in an amount such that, if calculated as alkali metal oxide, said adsorbent contains in excess of 5% by weight alkali metal oxide based on the weight of alumina present in said adsorbent, said adsorbent having a pore volume distribution of at least 0.10 cc/g at a pore diameter of 750 Angstroms and greater, of at least 0.35 cc/g at a pore diameter of 40 Angstroms and greater and at least 0.16 cc/g at pore diameters in the range of from about 10,000 Angstroms to about 100 Angstroms, said adsorbent having a crush strength of at least 15 lbs.
Claim 2
Dependent Claim
161 words
A promoted adsorbent for removing HCl from fluid streams comprising: activated alumina, and an alkali metal promoter, said alkali metal promoter being derived from a water soluble, alkali metal salt of a carboxylic acid containing from 1 to 6 carbon atoms heat treated with said alumina at a temperature of about 300° to about 555° C. for about 10-60 minutes and present in an amount such that, if calculated as alkali metal oxide, said adsorbent contains in excess of 5% by weight alkali metal oxide based on the weight of alumina present in said adsorbent, said adsorbent having a pore volume distribution of at least 0.10 cc/g at a pore diameter of 750 Angstroms and greater, of at least 0.35 cc/g at a pore diameter of 40 Angstroms and greater and at least 0.16 cc/g at pore diameters in the range of from about 10,000 Angstroms to about 100 Angstroms, said adsorbent having a crush strength of at least 15 lbs.
Claim 3
Dependent Claim
11 words
The adsorbent of claim 1 wherein said alkali metal is sodium.
Claim 4
Dependent Claim
25 words
The adsorbent of claim 1 wherein said alumina is present in said adsorbent in an amount of from about 85 to about 95% by weight.
Claim 5
Dependent Claim
20 words
The adsorbent of claim 1 wherein said alkali metal oxide is present in an amount of about 10% by weight.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-05-30 | 1997-11-29 | 1998-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-05-30 | 2001-11-29 | 2002-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-05-30 | 2005-11-29 | 2006-05-31 | $7700.00 | Window Closed / Lapsed |