US4434140A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stripping a solution containing molybdenum and vanadium values
Assignee: Chevron USA Inc
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Filing: 1982-09-24
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Granted: 1984-02-28
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Expires: 2002-09-24
Abstract
Abstract A method of stripping an organic extraction solvent containing quaternary alkyl ammonium complexes. The extraction solvent is contacted with an aqueous stripping solution having at least 75 g/l bicarbonate ion, while maintained at between pH 7 and 9 at a temperature of no more than 50° C.
Inventors
- 👤 Gale L. Hubred
- 👤 Dean A. Van Leirsburg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 06:45
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/90; B01J23/94; C; C01; C01G; C01G31/00; C01G31/003; C01G39/00; C01G39/003; C22; C22B; C22B23/00; C22B23/005; C22B23/02; C22B23/026; C22B23/04; C22B23/0407; C22B23/0446; C22B23/0453; C22B23/0461; C22B3/00; C22B3/20; C22B3/26; C22B3/28; C22B3/288; C22B3/30; C22B3/306; C22B34/00; C22B34/20; C22B34/22; C22B34/30; C22B34/34; C22B7/00; C22B7/006; C22B7/008; C22B7/009; C01P; C01P2002/00; C01P2002/80; C01P2002/82; C01P2006/00; C01P2006/60; Y; Y02; Y02P; Y02P10/00; Y02P10/20; Y02P20/00; Y02P20/50; Y02P20/584
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
88 words
A method of stripping an organic extraction solvent containing molybdenum and vanadium quaternary alkyl ammonium complexes comprising: contacting said organic extraction solvent with an aqueous stripping solution maintained at a temperature of no more than 50° C., a pH of between 7 and 9, and containing at least 75 grams per liter of a salt of a bicarbonate ion, for a time sufficient to convert said molybdenum and vanadium quaternary alkyl ammonium complexes to aqueous soluble metal complexes; separating said organic extraction solvent and said aqueous stripping solution.
Claim 2
Independent Claim
88 words
A method of stripping an organic extraction solvent containing molybdenum and vanadium quaternary alkyl ammonium complexes comprising: contacting said organic extraction solvent with an aqueous stripping solution maintained at a temperature of no more than 50° C., a pH of between 7 and 9, and containing at least 75 grams per liter of a salt of a bicarbonate ion, for a time sufficient to convert said molybdenum and vanadium quaternary alkyl ammonium complexes to aqueous soluble metal complexes; separating said organic extraction solvent and said aqueous stripping solution.
Claim 3
Dependent Claim
14 words
The process of claim 1 wherein said salt of bicarbonate ion is ammonium bicarbonate.
Claim 4
Dependent Claim
15 words
The process of claim 1 wherein said organic extract solution contains tri-caprylyl methyl ammonium chloride.
Claim 5
Dependent Claim
16 words
The process of claim 1 wherein said bicarbonate concentration is at least 160 grams per liter.
References Cited (Backward Citations)
US3083085A
Cited
US3320024A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-02-27 | 1987-08-29 | 1988-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-02-27 | 1991-08-29 | 1992-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-02-27 | 1995-08-29 | 1996-02-28 | $7700.00 | Window Closed / Lapsed |