WO1997035897A1 - Novel polymeric sulfide mineral depressants - Google Patents
Novel polymeric sulfide mineral depressants Download PDFInfo
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- WO1997035897A1 WO1997035897A1 PCT/US1997/005825 US9705825W WO9735897A1 WO 1997035897 A1 WO1997035897 A1 WO 1997035897A1 US 9705825 W US9705825 W US 9705825W WO 9735897 A1 WO9735897 A1 WO 9735897A1
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- WO
- WIPO (PCT)
- Prior art keywords
- hydrogen
- units
- individually
- alkyl group
- minerals
- Prior art date
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D1/00—Flotation
- B03D1/001—Flotation agents
- B03D1/004—Organic compounds
- B03D1/016—Macromolecular compounds
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/52—Amides or imides
- C08F220/54—Amides, e.g. N,N-dimethylacrylamide or N-isopropylacrylamide
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/52—Amides or imides
- C08F220/54—Amides, e.g. N,N-dimethylacrylamide or N-isopropylacrylamide
- C08F220/56—Acrylamide; Methacrylamide
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F226/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a single or double bond to nitrogen or by a heterocyclic ring containing nitrogen
- C08F226/02—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a single or double bond to nitrogen or by a heterocyclic ring containing nitrogen by a single or double bond to nitrogen
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D1/00—Flotation
- B03D1/001—Flotation agents
- B03D1/004—Organic compounds
- B03D1/008—Organic compounds containing oxygen
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D1/00—Flotation
- B03D1/001—Flotation agents
- B03D1/004—Organic compounds
- B03D1/01—Organic compounds containing nitrogen
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D1/00—Flotation
- B03D1/001—Flotation agents
- B03D1/004—Organic compounds
- B03D1/012—Organic compounds containing sulfur
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D2201/00—Specified effects produced by the flotation agents
- B03D2201/06—Depressants
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D2203/00—Specified materials treated by the flotation agents; specified applications
- B03D2203/02—Ores
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D2203/00—Specified materials treated by the flotation agents; specified applications
- B03D2203/02—Ores
- B03D2203/04—Non-sulfide ores
Definitions
- gangue may include the so-called penalty elements such as arsenic and antimony, especially as sulfides.
- U.S. Patent No. 4,866,150 is directed to novel copolymers and terpolymers of an acrylamide and a thiourea which are taught as depressants for gangue sulfide minerals whereas U.S. Pat. No. 4,888,106 claims the use of those polymers in the beneficiation of value sulfide minerals.
- the present invention is directed to a novel terpolymer comprising recurring units of an acrylamide, a thiourea and a hydroxyl group containing (meth)acrylate monomer which terpolymer has been found to provide excellent remediation of value minerals with the corresponding unexpectedly superior rejection of gangue minerals and/or separation of value minerals from one another.
- new and useful terpolymers comprising recurring units of the formula:
- each R is individually hydrogen or a C 1 -C 4 alkyl group
- each R 1 is, individually, hydrogen or methyl
- R 2 is hydrogen or a C, - C 4 alkyl group
- each R 3 is, individually, hydrogen or a C C 4 alkyl group
- R 4 is hydrogen or a C ⁇ C ⁇ alkyl group
- each X is, individually, hydrogen or a hydroxyl group with the proviso that at least one X is hydroxyl group
- x is a mole fraction ranging from about 60% to about 98%
- y is a mole fraction ranging from about 1 % to about 20%
- z is a mole fraction ranging from about 1 % to about 20% and the molecular weight of the polymer ranges from about 1000 to about 2 million.
- the molecular weight of the terpolymer ranges from about 5,000 to about 500,000, x is a mole fraction ranging from about 70 to about 90%, y is a mole fraction ranging from about 5 to about 15% and z is a mole fraction ranging from about 5 to about 15%.
- the terpolymers of the above formula are those wherein the terpolymer comprises x units of acrylamide, y units of allyl thiourea and z units of hydroxyethyl methacrylate or dihydroxypropyl methacrylate.
- These new terpolymers may be prepared by polymerization methods taught in the art, e.g. U.S. Pat. Nos. 3,002,960; 3,255,142, etc., hereby inco ⁇ orated herein by reference. More particularly, they are prepared by copolymerizing the appropriate monomers at a temperature of from about 40°C to about 100°C, preferably from about 55°C to about 70°C, under adiabatic or isothermal conditions and in the presence of an appropriate catalyst such as a peroxide, azo or redox system.
- an appropriate catalyst such as a peroxide, azo or redox system.
- the polymers of this invention comprise as the (x) units, those derived from acrylamide per se, alkyl acrylamides such as methacrylamide, etc., and N- substituted acrylamide and methacrylamides such as N,N'-dimethylacrylamide, etc.
- the (y) units of the polymer defined above are derived from thiourea derivatives such as allyl thiourea, N-allyl-N'-methyl thiourea, N-allyl-N'-benzoyl thiourea, N-allyl-N- methyl,-N',N'-dimethyl thiourea and like.
- the (z) units of the terpolymer are derived from hydroxyl group containing monomers including the hydroxyalkyl acrylates and methacrylates such as hydroxyethyl acrylate, hydroxyethyl methacrylate, dihydroxypropyl acrylate, dihydroxypropyl methacrylate, hydroxybutyl acrylate, hydroxypentyl acrylate, hydroxyhexyl acrylate, hydroxybutyl methacrylate, hydroxypentyl methacrylate, hydroxyhexyl methacrylate, dihydroxyethyl acrylate, dihydroxyethyl methacrylate, dihydroxybutyl acrylate, dihydroxybutyl methacrylate, dihydroxypentyl acrylate, dihydroxypentyl methacrylate, dihydroxycyclohexylacrylate, dihydroxyhexyl methacrylate and the like.
- the polymers may contain small amounts, i.e., a mole fraction of less than about 5% of other copolymerizable comonomers, e.g. acrylic acid, or groups occurring as a result of post reaction of the te ⁇ olymer, e.g. hydrolysis of the x units to carboxyl containing groups.
- other copolymerizable comonomers e.g. acrylic acid
- groups occurring as a result of post reaction of the te ⁇ olymer e.g. hydrolysis of the x units to carboxyl containing groups.
- novel terpolymers of the present invention may be used in flotation processes for important separations; for example, copper from molybdenite by depressing the former; lead and copper sulfides from pyrite and sphalerite by depressing the latter; pentlandite from pyrrhotite by depressing the latter; copper sulfides or sphalerite from pyrite by depressing the latter, etc.
- the present invention provides a new and improved method for the beneficiation of value minerals from ores with selective rejection of gangue minerals or the separation of value minerals from one another, said method comprising: (a) providing an aqueous pulp slurry of finely divided, liberation-sized ore particles which contain said value and gangue minerals; (b) conditioning said pulp slurry with an effective amount of gangue depressant, a value mineral collector and a frothing agent, said depressant comprising a polymer comprising:
- each R is, individually, hydrogen or a C C 4 alkyl group
- each R 1 is, individually, hydrogen or methyl
- R 2 is hydrogen or a C,-C 4 alkyl group
- each R 3 is, individually, hydrogen or a C,-C 4 alkyl group
- R 4 is hydrogen or a C,-C 4 alkyl group
- each X is, individually, hydrogen or a hydroxyl group with the proviso that at least one X is a hydroxyl group
- x is a mole fraction ranging from about 60% to about 98%
- y is a mole fraction ranging from about 1% to about 20%
- z is a mole fraction ranging from about 1% to about 20% and the molecular weight of the polymer ranges from about 1,000 to about 2 million
- the molecular weight of the polymer ranges from about 1,000 to about 2 million
- the molecular weight of the terpolymer ranges from about 5,000 to about 500,000
- x is a mole fraction ranging from about 70% to about 90%
- y is a mole fraction ranging from about 5% to about 15%
- z is a mole fraction ranging from about 5% to abut 15%.
- the new and improved method of beneficiaating value minerals by froth flotation procedures employing the synthetic depressants in accordance with this invention provides excellent metallurgical recovery with significant improvements in grade.
- the novel mineral depressants are effective over a wide range of pH and dosage, for example, from about 0.01 lb. /ton to about 5.0 Ibs./ton.
- the depressants are compatible with available frothers and mineral collectors and may be readily inco ⁇ orated into any currently operating system or facility.
- use of the polymeric mineral depressants, when employed with sulfide ores can significantly reduce SO 2 emissions from smelting operations by reducing the amount of gangue sulfide minerals which remain in the value sulfide concentrate to be smelted.
- any "surface-modifying" agent can be used to prepare the sulfide surfaces to enhance adso ⁇ tion of the novel depressant polymers.
- reagents examples include NaCN, Nokes reagent, mercaptoethanol, thioglycolic acid, Na or K ferri and ferro cyanides, hydroxyethyltrithiocarbonates, and other trithiocarbonates, hydrogen peroxide, ozone, air, oxygen, sulfur dioxide, zinc cyanide, arsenic Nokes, mercaptopropionic acid, mercaptosuccinic acid, other related mercapto acids, 2-thiouracil, thioglycerol and the like.
- Additional compounds that can be used in conjunction with the novel polymer are given in the publication Nagaraj et al, Trans. IMM, Vol. 95, March 1986, pp. C17. Ratios of these surface modifying agents to the novel polymer hereof range from about 0.05-5.0:1 , respectively, preferably about 0.02-2.0:1 , although conditions of use and ores treated may vary these amounts somewhat.
- the present invention is preferably directed to the selective separation of sulfides, for example, gangue sulfides, from copper ores, complex sulfide ores, etc., containing lead, copper, zinc, silver, gold, etc, nickel and nickel-cobalt ores, gold ores and gold-silver ores and to facilitate copper-molybdenum, copper-lead, lead-zinc, copper-zinc separations, etc.
- sulfides for example, gangue sulfides, from copper ores, complex sulfide ores, etc., containing lead, copper, zinc, silver, gold, etc, nickel and nickel-cobalt ores, gold ores and gold-silver ores and to facilitate copper-molybdenum, copper-lead, lead-zinc, copper-zinc separations, etc.
- the mixture under agitation is heated to 55°C. AT 55°C, 20 cc each of 19.4% ammonium persulfate and 16.9% sodium metabisulfite, respectively, is fed simultaneously with a syringe pump at a rate of 0.11 cc/min.
- a syringe pump is fed simultaneously with a syringe pump at a rate of 0.11 cc/min.
- the feeding of a mixture of 8.4 parts (0.064 mole) of hydroxyethyl methacrylate and 159 parts of 52% acrylamide (1.16 moles) is also begun at a rate of 1.7 gm per minute.
- the polymerization is continued at 55°C until at least 95% conversion of monomer is reached based on dodecylmercaptan iodine titration (2-4 hours).
- the pH of finished copolymer solution is adjusted to 6.0-7.0 with at 20% NaOH.
- Example 2 The procedure of Example 1 is again followed except that the hydroxyethyl methacrylate is replaced by dihydroxypropyl methacrylate. Similar results are achieved. Examples 3-7
- R 1 CH 3
- R 2 H
- R 3 H
- Examples 8 - 10 Flotation tests are carried out on a North African zinc ore. Pulp samples are taken from the plant and evaluated in a laboratory float machine. The laboratory procedure includes the steps of 1 ) adding copper sulfate solution to the float cell to activate the zinc minerals followed by conditioning for one minute, 2) adding flotation collector-potassium amyl xanthate (PAX) and conditioning for one minute 3) adding a solution of the polymeric depressant in water to the float cell followed by one minute of conditioning, and 4) aerating to affect flotation of the floatable minerals and collecting the flotation product and tails.
- PAX flotation collector-potassium amyl xanthate
- PAX 115 AMD/HEM/ 353 10.5 69.7 96.7 48.2 23.0 ATU
- Example 11-14 On another sample of pulp from the same plant as in Examples 8-10, the polymer of Example 1 is compared to copolymers of acrylamide with allyl thiourea and of acrylamide with dihydroxypropyl methacrylate.
- the Example 1 polymer gives significantly better zinc grades in the rougher stage than either the control or the dihydroxypropyl methacrylate copolymer or the allyl thiourea copolymer.
- the zinc rougher concentrate obtained with the polymer of Example 1 is of sufficiently high grade (53%) to bypass the cleaning circuit and report directly as the final value product. Thus, 64% of the zinc in the original feed can bypass the cleaning circuit. This is a major bypass benefit.
- Example 15-17 On a third pulp sample from the same North African mine, as in Examples 8-10, the polymer of Example 1 is compared with a control and an acrylamide/hydroxyethyl methacrylate copolymer. Significantly better zinc grades are obtained with only a small loss in zinc recovery, especially in the rougher flotation stage. Again, the rougher zinc concentrate is sufficiently high in grade to bypass the cleaner circuit and qualify as the final product, which is a major benefit for the operating plant. The small loss in zinc recovery is inevitable due to locking of some zinc mineral with iron sulfides.
- sulfide mineral depressants are needed to separate them from non- sulfide minerals in either sulfide ores or non-sulfide ores.
- Some examples of these separations are: rejection of gangue sulfide minerals such as pyrite from coal; rejection of gangue sulfides from value oxide type minerals such as cassiterite; recovery of value sulfide minerals such as those of base metals from gangue non-sulfide minerals such as silica, silicates, carbonates, etc., by depressing the sulfide minerals and floating the non-sulfide minerals.
- Example 23 The polymer of Example 1 is evaluated as a depressant for the rejection of iron sulfides, e.g. such as pyrite during the beneficiation of coals. Selective depression of sulfides is achieved.
- Example 24 The polymer of Example 1 is evaluated as a depressant for the rejection of iron sulfides, e.g. such as pyrite during the beneficiation of coals. Selective depression of sulfides is achieved.
- Example 24 The polymer of Example 1 is evaluated as a depressant for the rejection of iron sulfides, e.g. such as pyrite during the beneficiation of coals. Selective depression of sulfides is achieved.
- the polymer of Example 1 is also evaluated as a depressant for the bulk of the value sulfides, e.g. those of copper, nickel, and iron, and the subsequent flotation separation of gangue non-sulfide minerals, e.g. silica and silicates. Bulk sulfides depression is achieved and the gangue non-sulfides are floated away using fatty acid or amine collectors.
- sulfides e.g. those of copper, nickel, and iron
- gangue non-sulfide minerals e.g. silica and silicates.
- Example 25 The polymer of Example 1 is also evaluated as a depressant for the gangue sulfides present in a tin ore during the flotation separation of value tin minerals, e.g. cassiterite.
- Polymers of the present invention can also be used in other separations involving depressing of sulfide minerals in many types of sulfide and non-sulfide ores.
Abstract
Description
Claims
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BR9708350A BR9708350A (en) | 1996-03-28 | 1997-03-26 | Polymer composition and process comprising the processing of valuable minerals from ores |
EP97921123A EP0889917B1 (en) | 1996-03-28 | 1997-03-26 | Novel polymeric sulfide mineral depressants |
PL97328965A PL186880B1 (en) | 1996-03-28 | 1997-03-26 | Novel polymeric depressors of sulphide-type minerals |
CA002250055A CA2250055C (en) | 1996-03-28 | 1997-03-26 | Novel polymeric sulfide mineral depressants |
AU27249/97A AU705721B2 (en) | 1996-03-28 | 1997-03-26 | Novel polymeric sulfide mineral depressants |
BG102747A BG63311B1 (en) | 1996-03-28 | 1998-09-02 | New copolymer sulphide mineral depressants and method for their use |
GR20000402513T GR3034826T3 (en) | 1996-03-28 | 2000-11-10 | Novel polymeric sulfide mineral depressants |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/625,263 US5756622A (en) | 1996-03-28 | 1996-03-28 | Polymeric sulfide mineral depressants |
US08/625,263 | 1996-03-28 |
Publications (1)
Publication Number | Publication Date |
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WO1997035897A1 true WO1997035897A1 (en) | 1997-10-02 |
Family
ID=24505274
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US1997/005825 WO1997035897A1 (en) | 1996-03-28 | 1997-03-26 | Novel polymeric sulfide mineral depressants |
Country Status (20)
Country | Link |
---|---|
US (2) | US5756622A (en) |
EP (1) | EP0889917B1 (en) |
CN (1) | CN1103343C (en) |
AR (1) | AR006426A1 (en) |
AU (1) | AU705721B2 (en) |
BG (1) | BG63311B1 (en) |
BR (1) | BR9708350A (en) |
CA (1) | CA2250055C (en) |
ES (1) | ES2152667T3 (en) |
GR (1) | GR3034826T3 (en) |
ID (1) | ID19553A (en) |
IN (1) | IN191595B (en) |
MY (1) | MY118127A (en) |
OA (1) | OA10887A (en) |
PE (1) | PE6498A1 (en) |
PL (1) | PL186880B1 (en) |
PT (1) | PT889917E (en) |
RU (1) | RU2175331C2 (en) |
WO (1) | WO1997035897A1 (en) |
ZA (1) | ZA972720B (en) |
Families Citing this family (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6799682B1 (en) * | 2000-05-16 | 2004-10-05 | Roe-Hoan Yoon | Method of increasing flotation rate |
JP4022595B2 (en) * | 2004-10-26 | 2007-12-19 | コニカミノルタオプト株式会社 | Imaging device |
AP2447A (en) * | 2005-02-04 | 2012-08-31 | Mineral And Coal Technologies Inc | Improving the seperation of diamond from gangue minerals |
CN101244404A (en) * | 2008-03-21 | 2008-08-20 | 北京矿冶研究总院 | Separation method of molybdenum-bismuth mineral |
CA2986644C (en) * | 2008-07-25 | 2019-10-29 | Cytec Technology Corp. | Flotation reagents and flotation processes utilizing same |
CN101337206B (en) * | 2008-08-13 | 2011-02-02 | 中南大学 | Sulphide ore floation collector and use method of diacyl bis-thiourea and preparation method thereof |
GEP20166440B (en) | 2009-12-04 | 2016-03-10 | Barrick Gold Corp | Separation of copper minerals from pyrite using air-metabisulfite treatment |
GB201115823D0 (en) | 2011-09-13 | 2011-10-26 | Novel Polymer Solutions Ltd | Mineral processing |
CN103788294B (en) * | 2012-10-30 | 2016-03-30 | 中国石油化工股份有限公司 | A kind of acrylamide copolymer and its preparation method and application |
AU2015369899A1 (en) * | 2014-12-23 | 2017-07-13 | Kemira Oyj | Selective flocculants for mineral ore beneficiation |
EA201791481A1 (en) * | 2014-12-30 | 2018-01-31 | Кемира Ойй | SUPPLIERS OF OIL FLOTATION CONTAINING MINERALS |
CN106478877B (en) * | 2015-08-31 | 2018-08-17 | 中国石油化工股份有限公司 | A kind of copolymer and the preparation method and application thereof |
CN105834008A (en) * | 2016-06-08 | 2016-08-10 | 江西元再生资源有限公司 | Preparation method of inhibitors for arsenic-containing sulfide minerals in copper tailings |
MX2019003996A (en) * | 2016-10-07 | 2019-09-19 | Cytec Ind Inc | Depressant compositions and methods for depressing the gangue sulfide minerals during the flotation of sulfide ores. |
US10654048B2 (en) | 2017-03-09 | 2020-05-19 | Chevron Phillips Chemical Company Lp | Recovery of molybdenum using sodium metabisulfite and a thiocarbonate depressant |
CN110653072A (en) * | 2019-09-28 | 2020-01-07 | 北京矿冶科技集团有限公司 | Molybdenum polymetallic sulfide ore flotation separation inhibitor and flotation separation method thereof |
CN110681495B (en) * | 2019-09-28 | 2021-08-06 | 北京矿冶科技集团有限公司 | Thiourea compound flotation separation inhibitor and flotation separation method thereof |
CN111649237B (en) * | 2020-01-16 | 2021-11-26 | 中石化中原石油工程设计有限公司 | Ground gathering and transporting system for exhausted gas reservoir |
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Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0338276A2 (en) * | 1988-04-18 | 1989-10-25 | American Cyanamid Company | Copolymers of acrylamide with allylthioureas as sulfide mineral depressants |
US4902764A (en) * | 1985-08-28 | 1990-02-20 | American Cyanamid Company | Polymeric sulfide mineral depressants |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4744893A (en) * | 1985-08-28 | 1988-05-17 | American Cyanamid Company | Polymeric sulfide mineral depressants |
US4888106A (en) * | 1988-04-18 | 1989-12-19 | American Cyanamid Company | Method of using polymeric sulfide mineral depressants |
-
1996
- 1996-03-28 US US08/625,263 patent/US5756622A/en not_active Expired - Lifetime
-
1997
- 1997-02-12 PE PE1997000088A patent/PE6498A1/en not_active IP Right Cessation
- 1997-02-24 MY MYPI97000697A patent/MY118127A/en unknown
- 1997-03-20 IN IN504CA1997 patent/IN191595B/en unknown
- 1997-03-26 AU AU27249/97A patent/AU705721B2/en not_active Ceased
- 1997-03-26 CN CN97193365A patent/CN1103343C/en not_active Expired - Fee Related
- 1997-03-26 EP EP97921123A patent/EP0889917B1/en not_active Expired - Lifetime
- 1997-03-26 ES ES97921123T patent/ES2152667T3/en not_active Expired - Lifetime
- 1997-03-26 CA CA002250055A patent/CA2250055C/en not_active Expired - Fee Related
- 1997-03-26 BR BR9708350A patent/BR9708350A/en not_active IP Right Cessation
- 1997-03-26 WO PCT/US1997/005825 patent/WO1997035897A1/en active IP Right Grant
- 1997-03-26 PT PT97921123T patent/PT889917E/en unknown
- 1997-03-26 PL PL97328965A patent/PL186880B1/en not_active IP Right Cessation
- 1997-03-26 AR ARP970101242A patent/AR006426A1/en unknown
- 1997-03-26 RU RU98119541/04A patent/RU2175331C2/en not_active IP Right Cessation
- 1997-03-27 ID IDP971043A patent/ID19553A/en unknown
- 1997-03-27 ZA ZA9702720A patent/ZA972720B/en unknown
- 1997-12-11 US US08/989,062 patent/US5959054A/en not_active Expired - Lifetime
-
1998
- 1998-09-02 BG BG102747A patent/BG63311B1/en unknown
- 1998-09-28 OA OA9800181A patent/OA10887A/en unknown
-
2000
- 2000-11-10 GR GR20000402513T patent/GR3034826T3/en not_active IP Right Cessation
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4902764A (en) * | 1985-08-28 | 1990-02-20 | American Cyanamid Company | Polymeric sulfide mineral depressants |
EP0338276A2 (en) * | 1988-04-18 | 1989-10-25 | American Cyanamid Company | Copolymers of acrylamide with allylthioureas as sulfide mineral depressants |
Also Published As
Publication number | Publication date |
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PT889917E (en) | 2001-04-30 |
ES2152667T3 (en) | 2001-02-01 |
BG102747A (en) | 1999-05-31 |
CN1214704A (en) | 1999-04-21 |
CA2250055C (en) | 2006-01-31 |
RU2175331C2 (en) | 2001-10-27 |
CA2250055A1 (en) | 1997-10-02 |
PE6498A1 (en) | 1998-03-04 |
ID19553A (en) | 1998-07-23 |
AU705721B2 (en) | 1999-05-27 |
ZA972720B (en) | 1997-10-23 |
GR3034826T3 (en) | 2001-02-28 |
AR006426A1 (en) | 1999-08-25 |
PL186880B1 (en) | 2004-03-31 |
PL328965A1 (en) | 1999-03-01 |
CN1103343C (en) | 2003-03-19 |
EP0889917A1 (en) | 1999-01-13 |
AU2724997A (en) | 1997-10-17 |
IN191595B (en) | 2003-12-06 |
OA10887A (en) | 2003-02-18 |
BG63311B1 (en) | 2001-09-28 |
BR9708350A (en) | 1999-08-03 |
US5756622A (en) | 1998-05-26 |
US5959054A (en) | 1999-09-28 |
EP0889917B1 (en) | 2000-11-02 |
MY118127A (en) | 2004-09-30 |
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