WO2016162344A1 - Composition collectrice pour flottation inverse - Google Patents

Composition collectrice pour flottation inverse Download PDF

Info

Publication number
WO2016162344A1
WO2016162344A1 PCT/EP2016/057460 EP2016057460W WO2016162344A1 WO 2016162344 A1 WO2016162344 A1 WO 2016162344A1 EP 2016057460 W EP2016057460 W EP 2016057460W WO 2016162344 A1 WO2016162344 A1 WO 2016162344A1
Authority
WO
WIPO (PCT)
Prior art keywords
sulfonic acid
salt
composition
alkyl
aromatic sulfonic
Prior art date
Application number
PCT/EP2016/057460
Other languages
English (en)
Inventor
Magnus Svensson
Anders Klingberg
Original Assignee
Akzo Nobel Chemicals International B.V.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Akzo Nobel Chemicals International B.V. filed Critical Akzo Nobel Chemicals International B.V.
Publication of WO2016162344A1 publication Critical patent/WO2016162344A1/fr

Links

Classifications

    • 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
    • B03D1/012—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
    • B03D1/00—Flotation
    • B03D1/02—Froth-flotation processes
    • B03D1/021—Froth-flotation processes for treatment of phosphate 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
    • 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
    • B03D1/01—Organic compounds containing nitrogen
    • B03D1/011—Quaternary ammonium compounds
    • 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
    • B03D2201/02—Collectors
    • 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
    • B03D2203/06—Phosphate ores

Definitions

  • the invention relates to a process of reversed froth flotation of ores and to a composition suitable for use as collector in such flotation processes of ores.
  • US 4,364,824 describes a reverse flotation process for removing alkaline earth metal carbonate impurities from a phosphate concentrate obtained from phosphorite/dolomite ores, including the steps of (a) reagentizing the phosphate concentrate with a phosphate depressant, a carbonate collector and a pH regulator, and adjusting the solids content to about 20-30% with water to make a flotation feed; and (b) subjecting the flotation feed to flotation to cause alkaline earth metal carbonate mineral impurities to float, and the phosphate-containing materials to sink to thereby remove said alkaline earth carbonate mineral impurities as an overflow tail to waste, and to collect as an underflow a phosphate concentrate containing substantially less alkaline earth metal carbonate impurities, wherein the carbonate collector is selected from the group consisting essentially of sulfonated fatty acids having a linear carbon chain of 8- 22 carbon atoms and in which the sulfur moiety is attached directly to a carbon atom in the
  • the invention now provides a process of froth flotation of ores wherein the process is a reversed flotation process and wherein as a collector a composition is used comprising:
  • composition suitable for use in such process comprising: a. a salt of an alkyl aromatic sulfonic acid and
  • the flotation process of the invention is a reversed flotation process.
  • Reversed flotation means that the desired ore is not concentrated in the froth, but in the residue of the flotation process.
  • the process of the invention is preferably a reversed flotation process for phosphate ores, more preferably for calcite- containing phosphate ores.
  • the pH during flotation in a preferred embodiment is suitably in the range of 4 to 6, preferably in the range of 4.8 to 5.5, especially in embodiments where a depressant is used that is a phosphate or phosphoric acid.
  • the reversed froth flotation process of the invention comprises the steps of
  • the composition of the present invention is a composition that is very beneficially used in a reversed froth flotation process as claimed, especially in a reversed froth flotation process of phosphate ores.
  • CN101791591 discloses a direct froth flotation process of a phosphate ore using a collector of cottonseed oil, fatty acid methyl ester and dodecyl benzene sulfonic acid sodium salt.
  • US 5,173,176 discloses dialkylated aryl monosulfonic acid salts useful as collectors in direct froth flotation processes of especially oxide ores.
  • the sodium sulfonic acid salts are used in combination with e.g. oleic acid or a fatty acid mixture.
  • EP 498 231 discloses formulations of a triethanolamine salt of C10-C12 alkyl benzene sulfonic acid to which rape seed oil is added.
  • these formulations are used as biocidal or agrochemical compositions and contain as additional components a toxicant and a silicone defoamer.
  • Toxicants are highly undesirable in froth flotation processes because of environmental issues and therefore banned by law for this application in the majority of countries.
  • a silicone defoamer will inherently make a froth flotation process unfeasible, as it will prevent the formation of the needed froth.
  • the disclosed formulations are inherently not suitable for use in a reversed froth flotation process
  • the collector composition comprises a salt of an alkyl aromatic sulfonic acid.
  • Aromatic sulfonic acids are compounds wherein a sulfonic acid group is directly linked to a carbon atom of an aromatic ring system.
  • Suitable aromatic ring systems include single ring systems, as well as fused aromatic rings and multiple aromatic ring structures. Examples of suitable aromatic structures include benzene, naphthalene, indene, anthracene and phenanthrene. It is preferred that the aromatic structure is a derivative of benzene.
  • at least one alkyl group is linked to the aromatic ring system.
  • the alkyl group has 4 to 24 carbon atoms.
  • the alkyl group may be a linear alkyl group, a cycloaliphatic alkyl group, or a branched alkyl group.
  • the alkyl group is branched.
  • the aromatic ring and the alkyl group may have further substituents, if so desired.
  • the alkyl aromatic sulfonic acid is a monomeric compound and is not part of a repeating unit of a polymer.
  • the aromatic ring is substituted by one alkyl group and by one sulfonic acid group.
  • Alkyl aromatic sulfonic acids can be prepared by sulfonation of alkyl aromatic precursors with concentrated sulfuric acid or sulfur trioxide.
  • the reaction mechanism of sulfonation corresponds to an electrophilic aromatic substitution.
  • Alkyl benzenes which are subjected to sulfonation are predominantly sulfonated in the para and ortho positions.
  • the alkyl aromatic sulfonic acid is present as a salt, which means that the sulfonic acid group has been at least partially neutralized by a base.
  • the sulfonic acid may be fully or partially neutralized.
  • the sulfonic acid is preferably neutralized with a sub-stoichiometric (i.e. 90-99% on molar basis) amount of base.
  • the counter ion of the sulfonic acid salt is a metal ion, for example an alkali or alkaline earth metal ion, such as sodium or potassium.
  • the counter ion is an ammonium cation.
  • the ammonium cation is a positively charged polyatomic ion with the chemical formula NR + . It is formed by the protonation of ammonia or an amine.
  • Ammonium is also a general name for positively charged or protonated substituted amines and ammonium cations (NR + ), where one or more hydrogen atoms are replaced by organic radical groups, indicated by R.
  • the alkyl aromatic sulfonic acid salt in the composition used in the process of the invention is the salt of an alkylamine, i.e. an alkyl ammonium salt. More preferably, the aromatic sulfonic acid salt is a branched alkyl ammonium salt, such as the salt of isopropyl amine. In one embodiment, the aromatic sulfonic acid salt is the isopropyl amine salt of a branched C12 alkyl benzene sulfonic acid.
  • composition used in the process of the invention further comprises a fatty acid or a salt thereof.
  • a fatty acid is a carboxylic acid with a long aliphatic chain, which is either saturated or unsaturated. Most naturally occurring fatty acids have a chain of an even number of carbon atoms, from 4 to 28. Fatty acid chains differ by length, often categorized as short to very long.
  • Short-chain fatty acids are fatty acids with aliphatic groups of fewer than six carbons (i.e. butyric acid).
  • MCFA Medium-chain fatty acids
  • LCFA Long-chain fatty acids
  • VLCFA Very long chain fatty acids
  • fatty acids having aliphatic chains of 6 to 22 carbon atoms are preferred.
  • Tall oil fatty acid which consists mainly of palmitic acid, oleic acid and linoleic acid, may be specifically mentioned as a suitable mixture of fatty acids. It has been found that the efficiency of the flotation process can be improved when the fatty acid is at least partially neutralized by a base.
  • the fatty acid may be fully or partially neutralized.
  • the fatty acid may be neutralized with a just below stoichiometric (i.e. 90-99% on molar basis) amount of base.
  • the counter ion of the sulfonic acid salt is a metal ion, for example an alkali or alkaline earth metal ion, such as sodium or potassium.
  • the counter ion is an ammonium ion, as defined above.
  • the fatty acid is neutralized with ethanol amine.
  • the weight ratio of alkyl aromatic sulfonic acid salt a. to fatty acid b. in the composition as used in the process of the invention may vary widely. Generally, the weight ratio of a. to b. is from 10:90 to 90:10, such as 30:70 to 70:30.
  • the composition as used in the process of the invention is preferably liquid at ambient temperature, i.e., at least in the range of 15 to 25°C but preferably in the whole range of between 10 and 50°C. It has been found that concentrated liquid compositions can be obtained, which require only a low amount of water to be liquid. Generally, the amount of water in the composition is in the range of 0 to 25% by weight of the composition, or 0 to 15% by weight.
  • the invention also relates to certain preferred collector compositions that are advantageously used in the process of the invention. As indicated, these are compositions suitable for use in such process comprising:
  • compositions of the invention comprise a salt of an alkyl aromatic sulfonic acid as component a.
  • Aromatic sulfonic acids are compounds as described above for the process.
  • the composition further comprises a fatty acid or a salt thereof as component b.
  • the fatty acid in component b. is a fatty acid as described above when describing the process.
  • the counter ion for at least one of either components a. or b. or for both is an ammonium cation.
  • the ammonium cation is a positively charged polyatomic ion with the chemical formula NR + . It is formed by the protonation of ammonia or an amine.
  • Ammonium is also a general name for positively charged or protonated substituted amines and ammonium cations (NR + ), where one or more hydrogen atoms are replaced by organic radical groups, indicated by R.
  • the ammonium cation is the salt of an alkylamine compound containing 1 to 3 alkyl groups (i.e. a primary, secondary or tertiary amine), wherein each alkyl independently has between 1 and 6 carbon atoms, even more preferably 1 to 4 carbon atoms, and wherein each alkyl group optionally may contain heteroatoms such as oxygen or nitrogen, like an alkanolamine or aminoalkylamine (alkyleneamine).
  • alkylamine compound containing 1 to 3 alkyl groups i.e. a primary, secondary or tertiary amine
  • each alkyl independently has between 1 and 6 carbon atoms, even more preferably 1 to 4 carbon atoms
  • each alkyl group optionally may contain heteroatoms such as oxygen or nitrogen, like an alkanolamine or aminoalkylamine (alkyleneamine).
  • the aromatic sulfonic acid salt in the composition is a branched alkyl ammonium salt, such as the salt of isopropyl amine.
  • the aromatic sulfonic acid salt is the isopropyl amine salt of a branched C12 alkyl benzene sulfonic acid.
  • the fatty acid and/or aromatic sulfonic acid is neutralized with 90 to 99%, most preferably 95 to 98%, of the stoichiometric amount of amine.
  • the fatty acid is neutralized with ethanol amine.
  • both component a. and component b. are present as ammonium salt.
  • the weight ratio of alkyl aromatic sulfonic acid salt a. to fatty acid b. in the composition of the invention may vary widely. Generally, the weight ratio of a. to b. is from 10:90 to 90:10, such as 30:70 to 70:30.
  • the composition is preferably liquid at ambient temperature, i.e., at least in the range of 15 to 25°C. It has been found that when using at least one of the components a and b as their ammonium salts, concentrated liquid compositions can be obtained, which require only a low amount of water to be liquid. Generally, the amount of water in the composition is in the range of 0 to 25% by weight of the composition, or 0 to 15% by weight.
  • the process of the invention may involve other additives and auxiliary materials which are typically present in a froth flotation process that can be added at the same time or preferably separately added during the process.
  • flotation aids that may be present in the flotation process are depressants (see below), frothers/froth regulators (such as pine oil, MIBC (methylisobutyl carbinol) and alcohols (such as hexanol and alcohol ethoxylates/propoxylates, such as diethylene glycol mono methyl ether), and pH-regulators.
  • depressants are added, which in the event that phosphate ores are treated can be phosphate mineral depressants.
  • phosphate depressants are polysaccharides, such as alkalized starch or dextrin; phosphates, such as phosphoric acid, sodium phosphate, poly phosphoric acid; sodium silicate (water glass) and soda ash.
  • Preferred depressants are phosphoric acid, sodium phosphate and poly phosphoric acid
  • it is furthermore preferred to ensure that the pH is in the range in which the depressant and/or the collector is performing best. For example, when using phosphoric acid, it is best to ensure that the pH of the conditioned aqueous medium is between 4 and 6 and to optionally adjust the pH to within this range by adding an acid or base to the medium.
  • the present invention relates to a pulp comprising crushed and ground phosphate ore, a collector composition as defined herein, and optionally a depressant and further flotation aids.
  • the process of the invention is a flotation process wherein the ore is a phosphate ore.
  • the phosphate ore contains calcite (CaCOs) as impurity to be removed in the flotation process.
  • the amount of the collector used in the process of reversed flotation of the present invention will depend on the amount of impurities present in the ore and on the desired separation effect, but in some embodiments will be in the range of from 100 to 2,000 g/ton dry ore, preferably in the range of from 200 to 1 ,500 g/ton dry ore.
  • Collector composition 1 The following compositions were prepared by mixing the components in the weight ratios indicated.
  • Collector composition 1 The following compositions were prepared by mixing the components in the weight ratios indicated.
  • compositions were tested as collector for reversed flotation of calcite from a sedimentary phosphate ore from Saudi Arabia with about 24% P 2 O 5 containing about 40% calcite.
  • 320 g of the ore in about 1 .3 I tap water of 20°C were conditioned for 30 seconds together with 1 ,500 g/t phosphoric acid.
  • 2,000 g/t sulfuric acid were added and further conditioned for 30 seconds.
  • the collector was added as 3.2% aqueous solution and conditioning continued for another 60 seconds.
  • the pH was kept at 5.0 - 5.2 during the conditioning.
  • flotation was performed by switching on an air inlet with air flow of about 3.5 l/min for 2 minutes.
  • composition C When ABS (comparative composition C) is used as collector alone, a lot of foam is formed but the foam does not contain any particles, meaning no flotation occurs at all. Furthermore, it is shown that compositions using both the alkyl aromatic sulfonic acid and the fatty acid component at least partly as their ammonium salts (composition 1 , the monoethanolamine will neutralize the tall oil fatty acid to its monoethanolammonium salt almost stoichiometrically) are slightly better than compositions using one of them as their ammonium salt (composition 2)

Abstract

Cette invention concerne un procédé de flottation inverse par mousse mettant en œuvre en tant que collecteur une composition comprenant : a) un sel d'un acide sulfonique aromatique alkylé et b) un acide gras ou un sel de celui-ci, ainsi que des compositions collectrices spécifiques qui sont mises en œuvre dans un tel procédé.
PCT/EP2016/057460 2015-04-09 2016-04-06 Composition collectrice pour flottation inverse WO2016162344A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US201562145011P 2015-04-09 2015-04-09
EP15163010 2015-04-09
EP15163010.0 2015-04-09
US62/145,011 2015-04-09

Publications (1)

Publication Number Publication Date
WO2016162344A1 true WO2016162344A1 (fr) 2016-10-13

Family

ID=52823520

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2016/057460 WO2016162344A1 (fr) 2015-04-09 2016-04-06 Composition collectrice pour flottation inverse

Country Status (1)

Country Link
WO (1) WO2016162344A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20200391224A1 (en) * 2019-06-17 2020-12-17 Arr-Maz Products, L.P. Reagent for sedimentary phosphate flotation

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1370402A (en) * 1972-01-31 1974-10-16 Procter & Gamble Liquid detergent compositions
US4364824A (en) 1981-06-02 1982-12-21 International Minerals & Chemical Corp. Flotation of phosphate ores containing dolomite
GB2181739A (en) * 1985-10-16 1987-04-29 Unilever Plc Detergent bar comprising soap and a rosin derivative or synthetic anionic surfactant
EP0453677A1 (fr) * 1990-04-19 1991-10-30 The Dow Chemical Company Dépression de la silice ou d'une gangue siliceuse dans la flottation des minerais
EP0498231A1 (fr) 1991-02-08 1992-08-12 ALBRIGHT & WILSON UK LIMITED Suspensions biocides et agrochimiques
US5173176A (en) 1990-02-23 1992-12-22 The Dow Chemical Company Dialkylated aryl monosulfonate collectors useful in the flotation of minerals
EP0562040A1 (fr) * 1990-12-17 1993-09-29 Dow Chemical Co Agents collecteurs a base de monosulfonate d'aryle utiles a la flottation de mineraux.
CN101791591A (zh) 2010-01-05 2010-08-04 湖北富邦化工科技有限公司 磷矿低温泡沫浮选捕收剂及其制备方法

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1370402A (en) * 1972-01-31 1974-10-16 Procter & Gamble Liquid detergent compositions
US4364824A (en) 1981-06-02 1982-12-21 International Minerals & Chemical Corp. Flotation of phosphate ores containing dolomite
GB2181739A (en) * 1985-10-16 1987-04-29 Unilever Plc Detergent bar comprising soap and a rosin derivative or synthetic anionic surfactant
US5173176A (en) 1990-02-23 1992-12-22 The Dow Chemical Company Dialkylated aryl monosulfonate collectors useful in the flotation of minerals
EP0453677A1 (fr) * 1990-04-19 1991-10-30 The Dow Chemical Company Dépression de la silice ou d'une gangue siliceuse dans la flottation des minerais
EP0562040A1 (fr) * 1990-12-17 1993-09-29 Dow Chemical Co Agents collecteurs a base de monosulfonate d'aryle utiles a la flottation de mineraux.
EP0498231A1 (fr) 1991-02-08 1992-08-12 ALBRIGHT & WILSON UK LIMITED Suspensions biocides et agrochimiques
CN101791591A (zh) 2010-01-05 2010-08-04 湖北富邦化工科技有限公司 磷矿低温泡沫浮选捕收剂及其制备方法

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
INDIAN CHEM ENG., vol. 52, no. 3, July 2010 (2010-07-01)
K. SRINIVAS ET AL: "Comparative Study of Jhamarkotra Soap Emulsion and Tall Oil Soap Emulsion as Flotation Collectors", INDIAN CHEMICAL ENGINEER, vol. 52, no. 3, 1 July 2010 (2010-07-01), pages 248 - 253, XP055220089, ISSN: 0019-4506, DOI: 10.1080/00194506.2010.547973 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20200391224A1 (en) * 2019-06-17 2020-12-17 Arr-Maz Products, L.P. Reagent for sedimentary phosphate flotation

Similar Documents

Publication Publication Date Title
US4172029A (en) Phosphate flotation process
US10195614B2 (en) Composition of fatty acids and N-acyl derivatives of sarcosine for the improved flotation of nonsulfide minerals
WO2018197476A1 (fr) Collecteurs pour l'enrichissement de phosphate provenant de minerais contenant du phosphate
AU655976B2 (en) Flotation process for obtaining minerals from non-sulphidic ores
BR112015005133B1 (pt) processo para flotar minérios de fosfato
CA2120742A1 (fr) Methode de production de concentre de minerai de fer par flottation par mousse
EP0070534A1 (fr) Acides 3-alcoxypropyleneimino-bis(méthylènephosphoniques) et leurs sels, leur procédé de préparation et leur utilisation
WO2016162344A1 (fr) Composition collectrice pour flottation inverse
US4305815A (en) Conditioner for flotation of oxidized coal
CN112638540B (zh) 从含磷酸盐的矿石中富集磷酸盐
US10737281B2 (en) Compositions and methods for reverse froth flotation of phosphate ores
FI89877C (fi) Foerfarande foer selektiv flotation av fosformineraler
CN112427145B (zh) 一种方铅矿和黄铁矿的浮选分离方法
WO2020083793A1 (fr) Composition de collecteur et procédé de flottation pour l'enrichissement de phosphate
CN112403683B (zh) 一种p-Ph-SO2-类化合物在矿物浮选中的应用
US2238439A (en) Froth flotation process
US4892649A (en) Calcium carbonate beneficiation
EP3817862A1 (fr) Composition de collecteur contenant un composé biodégradable et procédé de traitement de minerais siliceux
CN115069423B (zh) 一种基于pH调控Mo-Pb-Zn至少一种硫化矿分选的方法
US20200338571A1 (en) Compositions and methods for reverse froth flotation of phosphate ores
CN114057614B (zh) 一种羟肟酸磺酸化合物及其制备方法和应用
WO2020007971A1 (fr) Procédé de flottation par mousse
EA044981B1 (ru) Обогащение фосфатов из фосфатсодержащих руд
CN115445781A (zh) 硫化矿浮选抑制以及选择性浮选分离黄铁矿和黄铜矿的方法
CA2092440A1 (fr) Procede de recuperation par flottation des mineraux presents dans un minerai non sulfure

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 16715827

Country of ref document: EP

Kind code of ref document: A1

DPE1 Request for preliminary examination filed after expiration of 19th month from priority date (pct application filed from 20040101)
NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 16715827

Country of ref document: EP

Kind code of ref document: A1