US4680169A
Expired / Lapsed
US
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Removal of ammonium ion from acidic liquors
Assignee: Honeywell International Inc
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Filing: 1985-12-30
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Granted: 1987-07-14
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Expires: 2005-12-30
Abstract
Abstract An improved process for reducing ammonium ion concentration in an ammonium ion-containing, acidic liquor is provided. The process includes the essential step of reacting ammonium ion with a persulfate.
Inventors
- 👤 Thomas R. Morgan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:48
CPC Classifications
C; C01; C01G; C01G37/00; C01G37/14; Y; Y10; Y10S; Y10S210/00; Y10S210/902; Y10S210/903
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
48 words
A process for reducing ammonium ion concentration in an ammonium ion-containing, acidic liquor comprising sodium dichromate and having a pH of 2.5-4.5, said process comprising oxidatively converting ammonium ion in said acidic liquor, to nitrogen with a reagent consisting essentially of a persulfate at a temperature above ambient.
Claim 2
Dependent Claim
48 words
A process for reducing ammonium ion concentration in an ammonium ion-containing, acidic liquor comprising sodium dichromate and having a pH of 2.5-4.5, said process comprising oxidatively converting ammonium ion in said acidic liquor, to nitrogen with a reagent consisting essentially of a persulfate at a temperature above ambient.
Claim 3
Dependent Claim
11 words
The process of claim 1, wherein said persulfate is sodium persulfate.
Claim 4
Dependent Claim
26 words
The process of claim 1, wherein said persulfate is used in an amount about stoichiometrically equivalent to the amount of ammonium ion in said acidic liquor.
Claim 5
Dependent Claim
18 words
The process of claim 1 wherein the temperature is the atmospheric pressure boiling temperature of said acidic liquor.
References Cited (Backward Citations)
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| 3.5 Years (Year 4) | 1990-07-13 | 1991-01-12 | 1991-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-07-13 | 1995-01-12 | 1995-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-07-13 | 1999-01-12 | 1999-07-14 | $7700.00 | Window Closed / Lapsed |