US4153549A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sodium dialkyl sulfosuccinates as dewatering aids in the filtration of mineral concentrates
Assignee: Wyeth Holdings LLC
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Filing: 1977-07-20
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Granted: 1979-05-08
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Expires: 1997-07-20
Abstract
Abstract The use of a dialkylsulfosuccinic acid or salt thereof as a dewatering aid in the filtration of mineral concentrates provides reduced moisture content and substantial retention of the dewatering aid on the dewatered mineral concentrate when the alkyl groups of the dewatering aid contain 10 to 24 carbon atoms.
Inventors
- 👤 Samuel S. Wang
- 👤 Morris E. Lewellyn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:20
CPC Classifications
B; B01; B01D; B01D37/00; B01D37/03; B03; B03D; B03D1/00; B03D1/001; B03D1/004; B03D1/012; B03D2203/00; B03D2203/02; B03D2203/04
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
78 words
A process for reducing the moisture content of mineral concentrates subject to dewatering which comprises mixing with an aqueous slurry of said mineral concentrate an effective amount of a dialkylsulfosuccinic acid or salt thereof of the formula: ##STR3## wherein M is a hydrogen, alkali metal, or ammonium cation and R is an alkyl group of about 10 to 24 carbon atoms, dewatering the thus-treated slurry, and substantially retaining upon said dewatered mineral concentrate said dialkylsulfosuccinic acid or salt.
Claim 2
Dependent Claim
78 words
A process for reducing the moisture content of mineral concentrates subject to dewatering which comprises mixing with an aqueous slurry of said mineral concentrate an effective amount of a dialkylsulfosuccinic acid or salt thereof of the formula: ##STR3## wherein M is a hydrogen, alkali metal, or ammonium cation and R is an alkyl group of about 10 to 24 carbon atoms, dewatering the thus-treated slurry, and substantially retaining upon said dewatered mineral concentrate said dialkylsulfosuccinic acid or salt.
Claim 3
Dependent Claim
13 words
The process of claim 1 wherein the mineral concentrate is a copper concentrate.
Claim 4
Dependent Claim
13 words
The process of claim 1 wherein said dialkyl sulfosuccinic salt is sodium di(n-decyl)sulfosuccinate.
Claim 5
Dependent Claim
13 words
The process of claim 1 wherein said dialkyl sulfosuccinate salt is sodium di(tridecyl)sulfosuccinate.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-05-07 | 1982-11-06 | 1983-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-05-07 | 1986-11-06 | 1987-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-05-07 | 1990-11-06 | 1991-05-08 | $7700.00 | Window Closed / Lapsed |