US4128475A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for beneficiation of mineral values
Assignee: Wyeth Holdings LLC
•
Filing: 1977-07-20
•
Granted: 1978-12-05
•
Expires: 1997-07-20
Abstract
Abstract Improved recovery of mineral values is obtained in froth flotation thereof when the frothing composition employed is a combination of a conventional frothing agent and an amino-aldehyde resin.
Inventors
- 👤 Samuel S. Wang
- 👤 Eugene L. Smith, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:06
CPC Classifications
B; B03; B03D; B03D1/00; B03D1/001; B03D1/004; B03D1/008; B03D2201/00; B03D2201/02; B03D2203/00; B03D2203/02
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
101 words
In a process of beneficiation of mineral ore by froth flotation in the presence of a collector, the improvement which comprises using as the frothing agent a composition comprising from about 1 to about 99 weight percent of a frothing agent selected from the group consisting of pine oil, creosote, cresylic acid, alcohols, polypropylene glycols and ethers and, correspondingly, from about 99 to about 1 weight percent of an amino-aldehyde resin comprising the alkylated reaction product of an aldehyde and a material selected form the group consisting of urea, melamine, guanamines, ethylene urea, aceylen diureas, pyrimidines, tetrahydropyrimidines, thiourea, carbamates and urethanes.
Claim 2
Dependent Claim
101 words
In a process of beneficiation of mineral ore by froth flotation in the presence of a collector, the improvement which comprises using as the frothing agent a composition comprising from about 1 to about 99 weight percent of a frothing agent selected from the group consisting of pine oil, creosote, cresylic acid, alcohols, polypropylene glycols and ethers and, correspondingly, from about 99 to about 1 weight percent of an amino-aldehyde resin comprising the alkylated reaction product of an aldehyde and a material selected form the group consisting of urea, melamine, guanamines, ethylene urea, aceylen diureas, pyrimidines, tetrahydropyrimidines, thiourea, carbamates and urethanes.
Claim 3
Dependent Claim
19 words
The process of claim 1 wherein said composition contains from about 20 to 50 weight percent of amino-aldehyde resin.
Claim 4
Dependent Claim
16 words
The process of claim 1 wherein said composition contains methyl isobutyl carbinol as the frothing agent.
Claim 5
Dependent Claim
15 words
The process of claim 1 wherein said composition contains pine oil as the frothing agent.
Claim 6
Dependent Claim
19 words
The process of claim 1 wherein said composition contains polypropylene glycol of molecular weight 425 as the frothing agent.
Claim 7
Dependent Claim
11 words
The process of claim 3 wherein said amino-aldehyde resin is hexakis(methoxymethyl)melamine.
Claim 8
Dependent Claim
11 words
The process of claim 4 wherein said amino-aldehyde resin is hexakis(methoxymethyl)melamine.
Claim 9
Dependent Claim
11 words
The process of claim 5 wherein said amino-aldehyde resin is hexakis(methoxymethyl)melamine.
References Cited (Backward Citations)
DE12047C
Cited
CA583809A
Cited
GB145852A
Cited
US2222728A
Cited
US2695101A
Cited
US3025313A
Cited
US3017028A
Cited
US3322762A
Cited
US3710939A
Cited
SU398728A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-12-04 | 1982-06-05 | 1982-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-12-04 | 1986-06-05 | 1986-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-12-04 | 1990-06-05 | 1990-12-05 | $7700.00 | Window Closed / Lapsed |