US4684459A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Collector compositions for the froth flotation of mineral values
Assignee: Dow Chemical Co
•
Filing: 1986-04-28
•
Granted: 1987-08-04
•
Expires: 2006-04-28
Abstract
Abstract A collector composition for use in froth flotation processes comprises two collectors. One of the collectors is preferably an omega-(hydrocarbylthio)alkylamine, S-(omega-aminoalkyl) hydrocarbyl thioate, N-(hydrocarbyl)-alpha, omega-alkanediamine, (omega-aminoalkyl) hydrocarbon amide, omega-(hydrocarbyloxy)alkylamine, omega-aminoalkyl hydrocarbonoate or mixture thereof. The second collector is a thiocarbonate, a thionocarbamate, a thiophosphate, thiocarbinilide, thiophosphinate, mercaptan, xanthogen formate, xanthic ester or mixture thereof. The collector composition floats a broad range of metal-containing minerals.
Inventors
- 👤 Richard R. Klimpel
- 👤 Robert D. Hansen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:28
CPC Classifications
B; B03; B03D; B03D1/00; B03D1/001; B03D1/004; B03D1/012; B03D1/01; B03D1/014; B03D2201/00; B03D2201/02; B03D2203/00; B03D2203/02
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
101 words
A composition comprising (a) a compound corresponding to the formula: R.sup.1 --X--(R).sub.n N(R.sup.2).sub.a (H).sub.b where --(R) n is ##STR24## R' is hydrogen, methyl or ethyl, y+p+m=n, n is an integer from 1 to 6 and each moiety can occur in random sequence; R 1 and R 2 are independently a C 1-22 hydrocarbyl or a C 1-22 substituted hydrocarbyl; X is --S-- or ##STR25## a is 0 or 1, b is 1 or 2 and a+b=2; and (b) a thiol compound selected from the group consisting of thiocarbonate, thionocarbamate, thiocarbanilide, thiophosphate, thiophosphinate, mercaptan, xanthogen formate, a xanthic ester and mixtures thereof.
Claim 2
Dependent Claim
101 words
A composition comprising (a) a compound corresponding to the formula: R.sup.1 --X--(R).sub.n N(R.sup.2).sub.a (H).sub.b where --(R) n is ##STR24## R' is hydrogen, methyl or ethyl, y+p+m=n, n is an integer from 1 to 6 and each moiety can occur in random sequence; R 1 and R 2 are independently a C 1-22 hydrocarbyl or a C 1-22 substituted hydrocarbyl; X is --S-- or ##STR25## a is 0 or 1, b is 1 or 2 and a+b=2; and (b) a thiol compound selected from the group consisting of thiocarbonate, thionocarbamate, thiocarbanilide, thiophosphate, thiophosphinate, mercaptan, xanthogen formate, a xanthic ester and mixtures thereof.
Claim 3
Dependent Claim
69 words
The composition of claim 1 wherein y=0, m=0 and p is an integer from 1 to 6, R 1 is a C 2-14 hydrocarbyl or a C 2-14 hydrocarbyl substituted with one or more hydroxy, amino, phosphonyl, or alkoxy moieties and R 2 is a C 1-6 alkyl, C 1-6 alkylcarbonyl, or a C 1-6 alkyl or C 1-6 alkylcarbonyl group substituted with an amino, hydroxy or phosphonyl moiety.
Claim 4
Dependent Claim
131 words
The composition of claim 2 wherein component (b) is an alkyl thiocarbonate of the structural formula: ##STR26## a thionocarbamate of the structural formula: ##STR27## a thiophosphate of the structural formula: ##STR28## or mixtures thereof and R 4 is a C 1-20 alkyl group; each R 5 is independently a C 1-10 alkyl group; Y is --S - M + or --OR 6 ; R 6 is a C 1-10 alkyl group; each R 7 is independently hydrogen, a C 1-10 alkyl group or an aryl group; M + is an alkali metal cation; Z, Z 1 and Z 2 are independently S or O; c is the integer 1 or 2; and d is the integer 0 or 1, with the proviso that the sum of c plus d equal 2.
Claim 5
Dependent Claim
50 words
The composition of claim 3 which comprises from about 10 to about 90 percent by weight of component (a) and from about 10 to about 90 percent by weight of component (b) wherein component (b) is selected from the group consisting of an alkyl thiocarbonate, thionocarbamate, thiophosphate or mixture thereof.
Claim 6
Dependent Claim
32 words
The composition of claim 4 which comprises from about 20 to about 80 percent by weight of component (a) and from about 20 to about 80 percent by weight of component (b).
Claim 7
Dependent Claim
63 words
The composition of claim 5 wherein R 1 is C 2-14 hydrocarbyl; R 2 is C 1-6 alkyl or C 1-6 alkylcarbonyl; R 4 is C 2-16 alkyl; R 5 is C 1-4 alkyl; R 6 is C 2-6 alkyl; R 7 is cresyl or C 2-8 alkyl; M is sodium or potassium; and n is an integer of from 1 to 4.
Claim 8
Dependent Claim
51 words
The composition of claim 6 wherein R 1 is C 4-11 hydrocarbyl; R 2 is C 1-4 alkyl or C 1-4 alkylcarbonyl; n is the integer 2 or 3; X is --S--, R 4 is C 3-12 alkyl; R 5 is C 1-3 alkyl; and R 6 is C 3-4 alkyl.
Claim 9
Dependent Claim
12 words
The composition of claim 7 wherein component (b) is an alkyl thiocarbonate.
Claim 10
Dependent Claim
20 words
The composition of claim 7 wherein component (b) comprises a mixture of an alkyl monothiocarbonate, alkyl dithiocarbonate and alkyl trithiocarbonate.
Claim 11
Dependent Claim
11 words
The composition of claim 7 wherein component (a) comprises an omega-(hydrocarbylthio)alkylamide.
Claim 12
Dependent Claim
13 words
The composition of claim 7 wherein component (a) is 2-(hexylthio)ethylamine or ethyl 2-(hexylthio)ethylamide.
Claim 13
Dependent Claim
42 words
A method of recovering metal from a metal ore which comprises subjecting the metal ore, in the form of an aqueous pulp, to a froth flotation process in the presence of a flotating amount of the flotation collector composition of claim 1.
Claim 14
Dependent Claim
130 words
The method of claim 12 wherein component (b) is an alkyl thiocarbonate corresponding to the structural formula: ##STR29## a thionocarbamate corresponding to the structural formula: ##STR30## and a thiophosphate corresponding to the structural formula: ##STR31## and R 4 is a C 1-20 alkyl group; each R 5 is independently a C 1-10 alkyl group; Y is --S - M + or OR 6 ; R 6 is a C 1-10 alkyl group; each R 7 is independently hydrogen, a C 1-10 alkyl group or aryl group; M is an alkali metal cation; Z, Z 1 and Z 2 are independently S or O; c is the integer 1 or 2; and d is the integer 0 or 1, with the proviso that the sum of c plus d equal 2.
Claim 15
Dependent Claim
52 words
The method of claim 13 wherein the collector comprises from about 10 to about 90 percent by weight of component (a) and from about 10 to about 90 percent by weight of component (b) wherein component (b) is selected from the group consisting of an alkyl thiocarbonate, thionocarbamate, thiophosphate or mixture thereof.
Claim 16
Dependent Claim
34 words
The method of claim 14 wherein the collector comprises from about 20 to about 80 percent by weight of component (a) and from about 20 to about 80 percent by weight of component (b).
Claim 17
Dependent Claim
38 words
The method of claim 15 wherein R 4 is C 2-16 alkyl; R 5 is C 1-4 alkyl; R 6 is C 2-6 alkyl; R 7 is hydrogen or C 2-8 alkyl; and M is sodium or potassium.
Claim 18
Dependent Claim
25 words
The method of claim 16 wherein R 4 is C 3-12 alkyl; R 5 is C 1-3 alkyl; and R 6 is C 3-4 alkyl.
Claim 19
Dependent Claim
12 words
The method of claim 17 wherein component (b) is an alkyl thiocarbonate.
Claim 20
Dependent Claim
20 words
The method of claim 17 wherein component (b) comprises a mixture of an alkyl monothiocarbonate, alkyl dithiocarbonate and alkyl trithiocarbonate.
Claim 21
Dependent Claim
15 words
The method of claim 12 wherein a metal-containing sulfide mineral is recovered in the froth.
Claim 22
Dependent Claim
30 words
The method of claim 20 wherein the metal-containing sulfide mineral recovered in the froth contains copper, zinc, molybdenum, cobalt, nickel, lead, arsenic, silver, chromium, gold, platinum, uranium or mixture thereof.
Claim 23
Dependent Claim
22 words
The method of claim 21 wherein the metal-containing sulfide mineral recovered in the froth is molybdenite, chalcopyrite, galena, sphalerite, bornite, or pentlandite.
Claim 24
Dependent Claim
31 words
The method of claim 22 wherein the collector composition is present in a concentration of from about 0.001 kg of collector/ton to about 1.0 kg of collector/ton of feed to flotation.
References Cited (Backward Citations)
US1833740A
Cited
US2011176A
Cited
US2070634A
Cited
US2185591A
Cited
US2501269A
Cited
US2769839A
Cited
US2691635A
Cited
US4066681A
Cited
US4086273A
Cited
CA1105156A
Cited
US4326067A
Cited
US4526696A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-08-03 | 1991-02-02 | 1991-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-08-03 | 1995-02-02 | 1995-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-08-03 | 1999-02-02 | 1999-08-04 | $7700.00 | Window Closed / Lapsed |