US4156649A
Expired / Lapsed
US
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Dewatering ore concentrates with branched alkyl ethoxylated alcohol
Assignee: Veolia WTS USA Inc
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Filing: 1978-02-22
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Granted: 1979-05-29
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Expires: 1998-02-22
Abstract
Abstract The present invention relates to the drainage or dewatering of ore concentrates and more particularly to an improved method for dewatering as by filtration, to produce solids which have a desirably low moisture content and which are readily and easily handled by conventional methods of materials handling. The method employs the use of linear or branched alkyl ethoxylated alcohols as dewatering aids.
Inventors
- 👤 John E. Quinn
- 👤 Lawrence S. Wittenbrook
- 👤 Charles E. Donegan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:54
CPC Classifications
C; C22; C22B; C22B1/00; B; B01; B01D; B01D37/00; B01D37/03; C02; C02F; C02F1/00; C02F1/52; C02F1/54
Claims Analysis
Total Claims: 37
Claim 1
Independent Claim
137 words
A process for improving the dewatering of an aqueous slurry of an ore concentrate solids which will subsequently undergo filtration to provide a filter cake of the ore solids having a low moisture content and better handling and processing characteristics, which process comprises adding to said slurry prior to filtration an effective amount for the purpose of a dewatering aid having the formula ##STR6## wherein R 1 , R 2 and R 3 are selected from the group consisting of hydrogen and alkyl such that the sum of the total number of carbon atoms in R 1 , R 2 and R 3 is an average of from about 5 to 17 and n is an average of about 1 to 7; subjecting the slurry to filtration; and thereby obtaining a filter cake having the said characteristics.
Claim 2
Dependent Claim
137 words
A process for improving the dewatering of an aqueous slurry of an ore concentrate solids which will subsequently undergo filtration to provide a filter cake of the ore solids having a low moisture content and better handling and processing characteristics, which process comprises adding to said slurry prior to filtration an effective amount for the purpose of a dewatering aid having the formula ##STR6## wherein R 1 , R 2 and R 3 are selected from the group consisting of hydrogen and alkyl such that the sum of the total number of carbon atoms in R 1 , R 2 and R 3 is an average of from about 5 to 17 and n is an average of about 1 to 7; subjecting the slurry to filtration; and thereby obtaining a filter cake having the said characteristics.
Claim 3
Dependent Claim
37 words
A process according to claim 1, wherein the dewatering aid is added to the aqueous slurry in an amount of from about 0.1 to about 1 pound per ton of ore concentrate solids contained in said slurry.
Claim 4
Dependent Claim
48 words
A process according to claim 1, wherein n is an average of from about 2 to about 4, and the total number of carbon atoms in R 1 , R 2 and R 3 is 9 to 14, and n is an average of 2 to about 5.
Claim 5
Dependent Claim
37 words
A process according to claim 3, wherein the dewatering aid is added to the aqueous slurry in an amount of from about 0.1 to about 1 pound per ton of ore concentrate solids contained in said slurry.
Claim 6
Dependent Claim
52 words
A process according to claim 1, wherein the ore concentrate solids is a wet metal sulfide selected from the group consisting of (i) copper, lead, zinc, iron, molybdenum, and nickel sulfides either alone or in combination or (ii) a mineral species selected from the group consisting of clay, coal and iron ores.
Claim 7
Dependent Claim
37 words
A process according to claim 5, wherein the dewatering aid is added to the aqueous slurry in an amount of from about 0.1 to about 1 pound per ton of ore concentrate solids contained in said slurry.
Claim 8
Dependent Claim
49 words
A process according to claim 6, wherein n is an average of from about 2 to about 4, and wherein the total number of carbon atoms in R 1 , R 2 and R 3 is 9 to 14, and n is an average of 2 to about 5.
Claim 9
Dependent Claim
24 words
A process according to claim 6, wherein the dewatering aid has the formula C 13 H 27 O(CH 2 CH 2 O) 3 H.
Claim 10
Dependent Claim
15 words
A method according to claim 7, wherein the wet metal sulfide is a copper sulfide.
Claim 11
Dependent Claim
15 words
A method according to claim 7, wherein the wet metal sulfide is a lead sulfide.
Claim 12
Dependent Claim
15 words
A method according to claim 7, wherein the wet metal sulfide is a zinc sulfide.
Claim 13
Dependent Claim
15 words
A method according to claim 7, wherein the wet metal sulfide is a molybdenum sulfide.
Claim 14
Dependent Claim
154 words
A process for improving the dewatering of an aqueous slurry of an ore concentrate solids which will subsequently undergo filtration to provide a filter cake of the ore solids having a low moisture content and better handling and processing characteristics, which process comprises adding to said slurry prior to filtration an effective amount for the purpose of a composition comprising water; a dewatering aid having the formula ##STR7## wherein R 1 , R 2 and R 3 are selected from the group consisting of hydrogen and alkyl such that the sum of the total number of carbon atoms in R 1 , R 2 and R 3 is an average of from about 5 to 17, and n is an average of about 1 to 7; and an effective amount for the purpose of a water soluble emulsifier which will promote the dispersiblity of the dewatering aid in the slurry and enhance its activity.
Claim 15
Dependent Claim
154 words
A process for improving the dewatering of an aqueous slurry of an ore concentrate solids which will subsequently undergo filtration to provide a filter cake of the ore solids having a low moisture content and better handling and processing characteristics, which process comprises adding to said slurry prior to filtration an effective amount for the purpose of a composition comprising water; a dewatering aid having the formula ##STR7## wherein R 1 , R 2 and R 3 are selected from the group consisting of hydrogen and alkyl such that the sum of the total number of carbon atoms in R 1 , R 2 and R 3 is an average of from about 5 to 17, and n is an average of about 1 to 7; and an effective amount for the purpose of a water soluble emulsifier which will promote the dispersiblity of the dewatering aid in the slurry and enhance its activity.
Claim 16
Dependent Claim
48 words
A process according to claim 13, wherein n is an average of from about 2 to 4 and wherein the total number of carbon atoms in R 1 , R 2 and R 3 is 9 to 14, and n is an average of 2 to about 5.
Claim 17
Dependent Claim
23 words
A process according to claim 14, wherein the weight ratio of said dewatering aid to said emulsifier is from about 20:1 to 1:1.
Claim 18
Dependent Claim
36 words
A process according to claim 15, wherein the composition is added to the aqueous slurry in an amount of from about 0.15 to about 1.5 pounds per ton of ore concentrate solids contained in said slurry.
Claim 19
Dependent Claim
27 words
A process according to claim 16, wherein the emulsifier is an anionic C 4 to C 18 sulfosuccinate or a C 4 to C 18 ethoxy sulfate.
Claim 20
Dependent Claim
52 words
A process according to claim 13, wherein the ore concentrate solids is a wet metal sulfide selected from the group consisting of (i) copper, lead, zinc, iron, molybdenum and nickel sulfides either alone or in combination or (ii) a mineral species selected from the group consisting of clay, coal and iron ores.
Claim 21
Dependent Claim
49 words
A process according to claim 18, wherein n is an average of from about 2 to about 4 and wherein the total number of carbon atoms in R 1 , R 2 and R 3 is 9 to 14, and n is an average of 2 to about 5.
Claim 22
Dependent Claim
23 words
A process according to claim 19, wherein the weight ratio of said dewatering aid to said emulsifier is from about 20:1 to 1:1.
Claim 23
Dependent Claim
24 words
A process according to claim 19, wherein the dewatering aid has the formula C 13 H 27 O(CH 2 CH 2 O) 3 H.
Claim 24
Dependent Claim
57 words
A process according to claim 21, wherein the emulsifier is an anionic C 4 to C 18 sulfosuccinate or a C 4 to C 18 ethoxy sulfate and said composition is added to the aqueous slurry in an amount of from about 0.15 to about 1.5 pounds per ton of ore concentrate solids contained in said slurry.
Claim 25
Dependent Claim
38 words
A process according to claim 19, wherein the composition comprises on a weight basis about 55% of said dewatering aid, about 5% sodium dioctyl sulfosuccinate, about 15% cold temperature and shelf life stabilizing agents, and the remainder water.
Claim 26
Dependent Claim
145 words
A process for improving the dewatering of an aqueous slurry of an ore concentrate solids which will subsequently undergo filtration to provide a filter cake of the ore solids having a low moisture content and better handling and processing characteristics, which process comprises adding to said slurry prior to filtration an effective amount for the purpose of a composition comprising a dewatering aid having the formula ##STR8## wherein R 1 , R 2 and R 3 are selected from the group consisting of hydrogen and alkyl such that the sum of the total number of carbon atoms in R 1 , R 2 and R 3 is an average of from about 5 to 17, and n is an average of about 1 to 7, in the liquid hydrocarbon solvent; subjecting the slurry to filtration; and thereby obtaining a filter cake having the said characteristics.
Claim 27
Dependent Claim
145 words
A process for improving the dewatering of an aqueous slurry of an ore concentrate solids which will subsequently undergo filtration to provide a filter cake of the ore solids having a low moisture content and better handling and processing characteristics, which process comprises adding to said slurry prior to filtration an effective amount for the purpose of a composition comprising a dewatering aid having the formula ##STR8## wherein R 1 , R 2 and R 3 are selected from the group consisting of hydrogen and alkyl such that the sum of the total number of carbon atoms in R 1 , R 2 and R 3 is an average of from about 5 to 17, and n is an average of about 1 to 7, in the liquid hydrocarbon solvent; subjecting the slurry to filtration; and thereby obtaining a filter cake having the said characteristics.
Claim 28
Dependent Claim
36 words
A process according to claim 24, wherein the composition is added to the aqueous slurry in an amount of from about 0.15 to about 1.5 pounds per ton of ore concentrate solids contained in said slurry.
Claim 29
Dependent Claim
23 words
A process according to claim 25, wherein the weight ratio of said aid to said hydrocarbon solvent is from about 3:2 to 1:4.
Claim 30
Dependent Claim
47 words
A process according to claim 26, wherein n is an average of from about 2 to about 4 and wherein the total carbon atoms of R 1 , R 2 and R 3 is 9 to 14, and n is an average of 2 to about 5.
Claim 31
Dependent Claim
52 words
A process according to claim 24, wherein the ore concentrate solids are a wet metal sulfide selected from the group consisting of (i) copper, lead, zinc, iron, molybdenum and nickel sulfide either alone or in combination or (ii) a mineral species selected from the group consisting of clay, coal and iron ores.
Claim 32
Dependent Claim
49 words
A process according to claim 28, wherein n is an average of from about 2 to about 4 and wherein the total number of carbon atoms in R 1 , R 2 and R 3 is 9 to 14, and n is an average of 2 to about 5.
Claim 33
Dependent Claim
23 words
A process according to claim 29, wherein the weight ratio of said aid to said hydrocarbon solvent is from about 3:2 to 1:4.
Claim 34
Dependent Claim
24 words
A process according to claim 30, wherein the dewatering aid has the formula C 13 H 27 O(CH 2 CH 2 O) 3 H.
Claim 35
Dependent Claim
25 words
A process according to claim 31, wherein the composition further contains a water soluble emulsifier which will promote distribution of the aid in the slurry.
Claim 36
Dependent Claim
33 words
A process according to claim 32, wherein the hydrocarbon solvent is kerosene or an odorless kerosene and the emulsifier is an anionic sodium sulfosuccinate or a C 4 to C 18 ethoxy sulfate.
Claim 37
Dependent Claim
28 words
A method according to claim 33, wherein the composition comprises on a weight basis about 55% of said aid, about 5% sodium dioctyl sulfosuccinate and about 40% kerosene.
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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) | 1982-05-28 | 1982-11-27 | 1983-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-05-28 | 1986-11-27 | 1987-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-05-28 | 1990-11-27 | 1991-05-29 | $7700.00 | Window Closed / Lapsed |