Patent US4043902A successfully refreshed from Google Patents.
US4043902A
Expired / Lapsed
US
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Tri-carboxylated and tetra-carboxylated fatty acid aspartates as flotation collectors
Assignee: Wyeth Holdings LLC
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Filing: 1975-06-06
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Granted: 1977-08-23
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Expires: 1995-06-06
Abstract
Abstract A process for beneficiating non-sulfide minerals such as celestite, barite, scheelite, fluorite, calcite, magnesite, gypsum, anhydrite, cassiterite, apatite and the like comprising froth floating a pulp conditioned with gangue depressant, where necessary, and using salts of tri- and tetra- carboxyl containing fatty alkyl substituted aspartic acids, aspartic mono-esters, and aspartic di-esters.
Inventors
- 👤 Hermen Hartjens
- 👤 Arnold Day
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:43
CPC Classifications
B; B03; B03D; B03D1/00; B03D1/001; B03D1/004; B03D1/01; B03D2201/00; B03D2201/02; B03D2203/00; B03D2203/02
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
110 words
A method of beneficiating an ore selected from the group consisting of non-sulfide minerals such as sulfates, carbonates, fluorides, tungstates, phosphates and oxides, which comprises grinding said ore to flotation size, pulping the ground ore in water, and subjecting the pulp to froth flotation with a compound of the group, trivalent salts of the formula: ##STR3## and tetravalent salts of the formula ##STR4## where R is a long chain alkyl group containing 12 to 22 carbon atoms and X is sodium, potassium or ammonium, and the mono or di alkyl esters thereof, where the alkyl group contains from 1 to 13 carbon atoms, preferably from 1 to 8 carbon atoms.
Claim 2
Independent Claim
110 words
A method of beneficiating an ore selected from the group consisting of non-sulfide minerals such as sulfates, carbonates, fluorides, tungstates, phosphates and oxides, which comprises grinding said ore to flotation size, pulping the ground ore in water, and subjecting the pulp to froth flotation with a compound of the group, trivalent salts of the formula: ##STR3## and tetravalent salts of the formula ##STR4## where R is a long chain alkyl group containing 12 to 22 carbon atoms and X is sodium, potassium or ammonium, and the mono or di alkyl esters thereof, where the alkyl group contains from 1 to 13 carbon atoms, preferably from 1 to 8 carbon atoms.
Claim 3
Dependent Claim
21 words
The process of claim 1 wherein the pulp is conditioned with an effective amount of a depressant for the gangue material.
Claim 4
Dependent Claim
35 words
The process of claim 2 wherein the ores are selected from celestite, barite, scheelite, calcite, cassiterite and magnesite and the depressant is sodium silicate in an amount of about 3 to 5 lbs. per ton.
Claim 5
Dependent Claim
10 words
The process of claim 3 wherein the ore is celestite.
Claim 6
Dependent Claim
10 words
The process of claim 3 wherein the ore is barite.
Claim 7
Dependent Claim
10 words
The process of claim 3 wherein the ore is scheelite.
Claim 8
Dependent Claim
10 words
The process of claim 3 wherein the ore is calcite.
Claim 9
Dependent Claim
10 words
The process of claim 3 wherein the ore is magnesite.
Claim 10
Dependent Claim
10 words
The process of claim 3 wherein the ore is cassiterite.
Claim 11
Dependent Claim
31 words
The process of claim 2 wherein the ores are selected from fluorite, gypsum and anhydrite and the depressant is Quebracho in an amount of about 0.1 to 1.0 lb. per ton.
Claim 12
Dependent Claim
10 words
The process of claim 10 wherein the ore is fluorite.
Claim 13
Dependent Claim
10 words
The process of claim 10 wherein the ore is gypsum.
Claim 14
Dependent Claim
10 words
The process of claim 10 wherein the ore is anhydrite.
Claim 15
Dependent Claim
24 words
The process of claim 2 wherein the ore is apatite and the depressant is NaOH in an amount of about 0.5 lb. per ton.
Claim 16
Dependent Claim
27 words
The process of claim 2 wherein the concentrate obtained is repulped and subjected to further froth flotation with addition of suitable depressant and said aspartates or both.
Claim 17
Dependent Claim
22 words
The process of claim 1 wherein the collector is used in the range of 0.15 to 0.3 lb. per ton of ore.
Claim 18
Dependent Claim
40 words
The process of claim 1 wherein froth flotation is carried out in stages with partial usage of collector in each stage so as to provide total collector usage in the range of 0.10 to 0.50 lb. per ton of ore.
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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) | 1980-08-22 | 1981-02-21 | 1981-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-08-22 | 1985-02-21 | 1985-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-08-22 | 1989-02-21 | 1989-08-23 | $7700.00 | Window Closed / Lapsed |