EP0108914A2 - Adjuvant de flottation et procédé pour la flottation de minerais non sulfurés - Google Patents

Adjuvant de flottation et procédé pour la flottation de minerais non sulfurés Download PDF

Info

Publication number
EP0108914A2
EP0108914A2 EP83109992A EP83109992A EP0108914A2 EP 0108914 A2 EP0108914 A2 EP 0108914A2 EP 83109992 A EP83109992 A EP 83109992A EP 83109992 A EP83109992 A EP 83109992A EP 0108914 A2 EP0108914 A2 EP 0108914A2
Authority
EP
European Patent Office
Prior art keywords
flotation
formula
ore
acid
minerals
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
EP83109992A
Other languages
German (de)
English (en)
Other versions
EP0108914B1 (fr
EP0108914A3 (en
Inventor
Holger Dr. Tesmann
Helmut Dr. Kachel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Henkel AG and Co KGaA
Original Assignee
Henkel AG and Co KGaA
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 Henkel AG and Co KGaA filed Critical Henkel AG and Co KGaA
Priority to AT83109992T priority Critical patent/ATE34675T1/de
Priority to NO833996A priority patent/NO833996L/no
Publication of EP0108914A2 publication Critical patent/EP0108914A2/fr
Publication of EP0108914A3 publication Critical patent/EP0108914A3/de
Application granted granted Critical
Publication of EP0108914B1 publication Critical patent/EP0108914B1/fr
Expired legal-status Critical Current

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
    • B03D1/02—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
    • B03D1/008—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
    • 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

Definitions

  • Such valuable minerals are, for example, apatite, fluorite, scheelite and other salt-like minerals, cassiterite and other heavy metal oxides, e.g. B. that of titanium and zirconium as well as certain silicates and aluminum silicates, the z. B. float in the presence of so-called collectors.
  • Fatty acids, in particular unsaturated fatty acids such as oleic acid are often used as collectors.
  • Other suitable collectors are e.g. B. sulfonate surfactants such as alkylarylsulfonates, sulfosuccinic acid monoalkyl esters or alkyl or aryl phosphonates.
  • collectors based on fatty acids or sulfonates are known to be comparatively unselective, since they are also suitable for flotation of silicate and carbonate minerals and are therefore only of limited use if it is necessary to separate such accompanying minerals from other valuable minerals. It is therefore necessary to add further aids or complex reagent mixtures in order to suppress the undesirable gaits. Selective flotation in the presence of calcite in particular is therefore a technical problem for which collectors containing fatty acids or sulfo groups have disadvantages in practice.
  • the invention relates to the use of acyl lactylates of the formula in which R is an aliphatic, cyclic or alicyclic radical having 7 to 23 carbon atoms and x r is a hydrogen ion or a water-solubilizing, salt-forming cation, as a collector in the flotation of non-sulfidic minerals.
  • acyl lactylates of the formula (I) is known; see Chemical Abstracts 55, 14740i (1961); 60, 13803e (1964); 65, 619c (1966) and 80, 107951q (1974).
  • carboxylic acids or their functional derivatives such as acyl halides, with lactic acid or salts of lactic acid, e.g. As sodium lactate, implemented at elevated temperatures.
  • acyl halides with lactic acid or salts of lactic acid, e.g. As sodium lactate
  • the removal of the water of reaction or other volatile reaction products such as hydrogen halides can be accelerated by working under reduced pressure, introducing inert gases or using solvents which form azeotropes.
  • suitable esterification catalysts can also be expedient.
  • acyl esters and lactic acid esters derived from lower alcohols are transesterified with removal of the lower alcohol in the presence of transesterification catalysts.
  • oligomeric lactyl lactylates and esters of oligomeric lactyl lactylates are formed in addition to the acyl lactylates.
  • the reaction mixture can also contain minor amounts of unreacted starting material. These accompanying substances do not interfere with the use of the products according to the invention as flotation agents and can therefore remain in the product.
  • Suitable carboxylic acids which are esterified with lactic acid are aliphatic, cycloaliphatic, aromatic and alkylaromatic carboxylic acids with 8 to 24 carbon atoms.
  • the carboxylic acids can contain linear or branched radicals and can also be substituted, for example by hydroxyl, sulfhydryl, carbonyl, ether or thioether groups. They are preferably derived from aliphatic, straight-chain, saturated or unsaturated carboxylic acids.
  • Examples include caprylic acid, capric acid, lauric acid, myristic acid, palmitic acid, stearic acid, arachic acid, undecenoic acid, lauroleic acid, palmitoleic acid, oleic acid, elaidic acid, ricinoleic acid, linoleic acid, arachidonic acid, erucic acid, brassidic acid and clupanodonic acid.
  • Mixtures of such fatty acids as are obtainable from naturally occurring fats of native or synthetic origin are usually used.
  • Examples of native fatty acid mixtures are those obtained from tall oil, soybean oil, cottonseed oil, palm oil, coconut oil, sunflower oil, rapeseed oil, fish oil, tallow or castor oil.
  • Lactylates of unsaturated fatty acids and of mixtures of saturated and unsaturated fatty acids which have at least 25% by weight, preferably more than 50% by weight of mono- and / or di-unsaturated fatty acids, in particular oleic acid, have proven to be particularly suitable.
  • Such oleic acid-rich mixtures can be separated from native fatty acid mixtures, e.g. B. from tallow fatty acids in the desired technical purity.
  • the acyl lactylates can be present as free acids or as water-soluble salts.
  • Salts of sodium, potassium, lithium and magnesium are also suitable, as well as salts of ammonium and organic ammonium bases, e.g. B. salts of mono-, di or triethanolamine, morpholine or guanidine. They are expediently used as sodium salts.
  • the preferred lactylates derived from oleic acid-rich fatty acid mixtures are viscous liquids with very low, ie. H. pour points below -10 ° to -20 ° C. This is an additional advantage compared to the known fatty acid collectors based on technical oleic acids, which are viscous to pasty products, because - unlike pasty agents - they can be dosed much faster or more precisely even at low temperatures and in the Allow mineral slurry to be distributed homogeneously. They also develop in the presence of alkaline earth ions, i.e. h, even when using hard water, an intensive, load-bearing foam, which is why in many cases it is not necessary to add additional foamers or additional collectors.
  • acyl lactylates to be used in the flotation are - depending on the nature of the ore to be flotated and the desired separation success - between 100 and 1000 g / t (grams per ton of ore). These amounts can also be exceeded, but the selectivity can decrease in the case of overdoses.
  • acyl lactylates In addition to the acyl lactylates, other common collectors, frothers and other flotation aids can be used in the flotation, which in certain cases can further improve the results.
  • anionic surfactants such as fatty acids and other carboxylic acid derivatives, sulfonation products of fatty oils or fatty acids, mineral oil sulfonates, alkylbenzenesulfonates, alkanesulfonates, sulfosuccinic acid esters or half-esters, sulfosuccinic acid amides or half-amides, alkyl sulfates, alkyl ether sulfates, alkyl or Dialkyl phosphates, alkyl or dialkyl ether phosphates and alkylphenol ether sulfates.
  • Nonionic regulators such as long-chain alcohols, alkylphenols and their ethoxylation products, can also be present.
  • their proportion based on the total amount of collectors and foaming agents present, should preferably be at least 25% by weight, in particular at least 40% by weight.
  • pH regulators may also be present, in addition inorganic or organic pusher such as water glass, starch and starch derivatives, lignin-based reagents such as lignin sulfonates, dextrins, tannic acids and tannic acid extracts, cellulose derivatives such as carboxymethyl cellulose , Hydroxyethyl cellulose or methyl cellulose or other known protective colloids.
  • inorganic or organic pusher such as water glass, starch and starch derivatives, lignin-based reagents such as lignin sulfonates, dextrins, tannic acids and tannic acid extracts, cellulose derivatives such as carboxymethyl cellulose , Hydroxyethyl cellulose or methyl cellulose or other known protective colloids.
  • lignin-based reagents such as lignin sulfonates, dextrins, tannic acids and tannic acid extracts
  • cellulose derivatives
  • the invention furthermore relates to a process for separating non-sulfidic minerals from an ore by flotation with mixing ground ore with water to form an ore suspension, characterized in that that air is introduced into the suspension in the presence of an effective amount of a compound of the formula (I) as a collector and the desired minerals are separated from the resulting foam.
  • the arrangement used for the flotation experiments consisted of a modified "Hallimond tube” as described by B. DOBIAS in "Colloid & Polymer Sci. 259, 775-776 (1981), which had a volume of 160 ml.
  • the apparatus was equipped with 1.5 g of a ground phosphorite ore and a solution of the collector (type II) in a concentration of 28 mg / l, corresponding to 3000 g / t, were fed in.
  • a nitrogen stream of 9.8 ml / min was passed through and stirring was carried out Discharge concentrate, which was analyzed depending on the time.
  • the pH of the flotation solution was 9.5, the lactylate being in the form of the sodium salt.
  • the results are summarized in Table I.
  • the amount of the collector in g / t, in column 2 the flotation time in minutes, in column 3, the yield in percent by weight, based on the amount of P 2 0 5 submitted, and in column 4, the P 2 0 5 - reproduced the content of the applied concentrate.
  • Table 2 shows the results of comparative tests.
  • V 1 sodium oleate
  • V 2 sodium dodecylbenzenesulfonate
  • V3 a sodium sulfosuccinic acid monoalkyl ester (alkyl radical C 12-18 ) was used, each in a concentration of 3000 g / t ore.
  • the collectors in experiments V 1 and V 2 are considerably less efficient than the compounds to be used according to the invention.
  • the phosphate content of the crude ore used is not yet significantly depleted, which is why the content c in the concentrate is still relatively high at this time. This must be taken into account when comparing the test results.
  • apatite ore was floated at 20 ° C. in a laboratory flotation cell (model D-1 from Denver Equipment) with a capacity of 1 liter.
  • the raw ore contained carbonate, olivine and magnetite as the gait. After magnetic separation of the main amount of magnetite, the following contents were determined:
  • Flotation was carried out in one stage at a turbidity of 200 g / l, a speed of rotation of the mixing device of 1200 per minute, a pH of 11 and with the addition of water glass in an amount of 2000 g / t. 300 g / t fatty acid lactylate (Na salt, type II) were used as collectors.
  • the flotation time was 4 minutes.
  • the mixture was floated for 4 minutes at a turbid density of 350 g / l and a speed of rotation of the mixing device of 1200 per minute.
  • 500 g / t water glass, 200 g / t dextrin and 750 g / t lignin sulfonate were added as pusher.
  • oleic acid lactylate Na salt, type I
  • sodium oleate V 5
  • sodium alkyl ether phosphate V 6
  • the quantity S of the collector used in g / t, the pH of the solution and the test results can be found in Table IV.
  • the application rate m is significantly higher compared to the known means.
  • Example 2 As described in Example 2, a low-value cassiterite ore, containing essentially granite, tourmaline and magnetite as gait, was floated for 4 minutes at a turbidity density of 300 g / l. The following contents were determined by analysis:

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Disintegrating Or Milling (AREA)
  • Paper (AREA)
  • Processing Of Solid Wastes (AREA)
  • Polysaccharides And Polysaccharide Derivatives (AREA)
  • Glass Compositions (AREA)
EP83109992A 1982-10-14 1983-10-06 Adjuvant de flottation et procédé pour la flottation de minerais non sulfurés Expired EP0108914B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AT83109992T ATE34675T1 (de) 1982-10-14 1983-10-06 Flotationshilfsmittel und verfahren zur flotation nichtsulfidischer minerale.
NO833996A NO833996L (no) 1982-11-03 1983-11-02 Stroemretter

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3238060 1982-10-14
DE19823238060 DE3238060A1 (de) 1982-10-14 1982-10-14 Flotationsmittel und verfahren zur flotation nichtsulfidischer minerale

Publications (3)

Publication Number Publication Date
EP0108914A2 true EP0108914A2 (fr) 1984-05-23
EP0108914A3 EP0108914A3 (en) 1986-08-13
EP0108914B1 EP0108914B1 (fr) 1988-06-01

Family

ID=6175685

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83109992A Expired EP0108914B1 (fr) 1982-10-14 1983-10-06 Adjuvant de flottation et procédé pour la flottation de minerais non sulfurés

Country Status (8)

Country Link
US (1) US4457850A (fr)
EP (1) EP0108914B1 (fr)
AT (1) ATE34675T1 (fr)
CA (1) CA1207092A (fr)
DE (2) DE3238060A1 (fr)
FI (1) FI73369C (fr)
MX (1) MX7649E (fr)
ZA (1) ZA837643B (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0201815A3 (en) * 1985-05-11 1989-10-18 Henkel Kommanditgesellschaft Auf Aktien Use of surfactant mixtures as flotation agents for non-sulfide ores
WO1991015298A1 (fr) * 1990-03-30 1991-10-17 Henkel Kommanditgesellschaft Auf Aktien Procede pour obtenir des mineraux a partir de minerais non sulfures par flottation
WO1991018674A1 (fr) * 1990-05-25 1991-12-12 Henkel Kommanditgesellschaft Auf Aktien Procede de recuperation de mineraux contenus dans des minerais non sulfures par flottation
WO1992021443A1 (fr) * 1991-05-29 1992-12-10 Henkel Kommanditgesellschaft Auf Aktien Procede d'obtention de mineraux a partir de minerais non sulfures par flottation
WO1993006935A1 (fr) * 1991-10-04 1993-04-15 Henkel Kommanditgesellschaft Auf Aktien Procede d'obtention de concentres de minerais de fer par flottation
AT397048B (de) * 1989-04-05 1994-01-25 Berol Nobel Ab Verfahren zur flotation von erdalkalimetall enthaltendem mineral sowie mittel hiefür

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3536975A1 (de) * 1985-10-17 1987-04-23 Henkel Kgaa Verwendung von nichtionischen tensiden als hilfsmittel fuer die flotation von nichtsulfidischen erzen
AU691312B2 (en) * 1994-07-06 1998-05-14 Boc Gases Australia Limited Physical separation processes for mineral slurries
AUPM668094A0 (en) * 1994-07-06 1994-07-28 Hoecker, Walter Physical separation processes for mineral slurries
EP3016746A2 (fr) 2013-07-05 2016-05-11 Akzo Nobel Chemicals International B.V. Synthèse de nouveaux tensio-actifs anioniques et leur utilisation comme collecteurs dans une flottation par moussage de minerais non sulfurés
CN115634777B (zh) * 2022-10-31 2023-06-20 江西省宜丰万国矿业有限公司 一种提高硫化铅锌矿中伴生金银回收率的浮选方法
CN117548225A (zh) * 2023-11-10 2024-02-13 广西华锡有色金属股份有限公司 利用磁选和浮选的低品位锡矿石的选矿方法
CN119237164B (zh) * 2024-10-29 2025-11-04 长沙矿山研究院有限责任公司 用于含镁碳酸盐型低品位萤石矿的选矿方法

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2120217A (en) * 1937-12-18 1938-06-07 Benjamin R Harris Ore flotation
US2778499A (en) * 1952-09-16 1957-01-22 Coal Industry Patents Ltd Method of froth flotation
IT549882A (fr) * 1955-03-05 1900-01-01
US3252662A (en) * 1962-08-20 1966-05-24 Monsanto Co Sulfide ore beneficiation
US4171261A (en) * 1975-11-11 1979-10-16 Chem-Y, Fabriek Van Chemische Produkten B.V. Process for the flotation of ores and collector for use in this process
DE2820942A1 (de) * 1978-05-12 1979-11-22 Sueddeutsche Kalkstickstoff Uebersaure feste metallactate, verfahren zu deren herstellung und verwendung
US4368117A (en) * 1978-06-22 1983-01-11 Outokumpu Oy Process for the selective froth-flotation of sulfidic, oxidic and salt-type minerals
US4368116A (en) * 1981-03-09 1983-01-11 Vojislav Petrovich Polyhydroxy fatty acids collector-frothers
US4387034A (en) * 1981-10-23 1983-06-07 Thiotech, Inc. Mixed alkylthionocarbamates flotation collectors and ore dressing methods in which the collectors are employed

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0201815A3 (en) * 1985-05-11 1989-10-18 Henkel Kommanditgesellschaft Auf Aktien Use of surfactant mixtures as flotation agents for non-sulfide ores
AT397048B (de) * 1989-04-05 1994-01-25 Berol Nobel Ab Verfahren zur flotation von erdalkalimetall enthaltendem mineral sowie mittel hiefür
WO1991015298A1 (fr) * 1990-03-30 1991-10-17 Henkel Kommanditgesellschaft Auf Aktien Procede pour obtenir des mineraux a partir de minerais non sulfures par flottation
WO1991018674A1 (fr) * 1990-05-25 1991-12-12 Henkel Kommanditgesellschaft Auf Aktien Procede de recuperation de mineraux contenus dans des minerais non sulfures par flottation
WO1992021443A1 (fr) * 1991-05-29 1992-12-10 Henkel Kommanditgesellschaft Auf Aktien Procede d'obtention de mineraux a partir de minerais non sulfures par flottation
US5441156A (en) * 1991-05-29 1995-08-15 Henkel Kommanditgesellschaft Auf Aktien Process and recovering minerals from non-sulfidic ores by flotation
WO1993006935A1 (fr) * 1991-10-04 1993-04-15 Henkel Kommanditgesellschaft Auf Aktien Procede d'obtention de concentres de minerais de fer par flottation
US5540336A (en) * 1991-10-04 1996-07-30 Henkel Kommanditgesellschaft Auf Aktien Method of producing iron ore concentrates by froth flotation

Also Published As

Publication number Publication date
EP0108914B1 (fr) 1988-06-01
FI73369C (fi) 1987-10-09
FI833363A0 (fi) 1983-09-20
EP0108914A3 (en) 1986-08-13
ATE34675T1 (de) 1988-06-15
CA1207092A (fr) 1986-07-02
DE3238060A1 (de) 1984-04-19
DE3376804D1 (en) 1988-07-07
FI833363L (fi) 1984-04-15
MX7649E (es) 1990-06-04
FI73369B (fi) 1987-06-30
ZA837643B (en) 1984-07-25
US4457850A (en) 1984-07-03

Similar Documents

Publication Publication Date Title
EP0270933B1 (fr) Mélanges d'agents tensio-actifs comme collecteurs pour la flottation de minerais non sulfurés
EP0201815B1 (fr) Utilisation de mélanges de tensio-actifs comme agents pour la flottation de minerais non sulfurés
DE69904820T2 (de) Herstellung von kollektorzusammensetzungen aus mischungen von hydroxamfettsäuren und öl zur erzflotation
EP0108914B1 (fr) Adjuvant de flottation et procédé pour la flottation de minerais non sulfurés
EP0585277A1 (fr) Procede d'obtention de mineraux a partir de minerais non sulfures par flottation.
EP0609257B1 (fr) Procede d'obtention de concentres de minerais de fer par flottation
US4830739A (en) Process and composition for the froth flotation beneficiation of iron minerals from iron ores
EP0298392A2 (fr) Procédé et agents pour l'obtention par flottation de minéraux à partir de minerais sulfurés
EP0270018B1 (fr) Utilisation d'Acides N-alkyle et N-alkényle aspartiques comme co-collecteurs pour la flottation de minerais non sulfurés
SE429822B (sv) Sett vid anrikning av jordkalimetallinnehallande mineral fran deras gangarter samt medel herfor
EP0270986B1 (fr) Alkylsulfosuccinates à base d'alcools gras propoxylés ainsi que d'alcools gras propoxylés et éthoxylés comme collecteurs pour la flottation de minerais non sulfurés
EP0378128A2 (fr) Procédé de flottation sélective de minerais de phosphate
EP0344553B1 (fr) Mélanges d'agents tensio-actifs comme collecteurs pour la flottation de minerais non sulfurés
EP0368061B1 (fr) Dérivés tensio-actifs d'acides gras et/ou d'esters d'acides gras comme collecteurs pour la flottation de minerais non sulfurés
AT397048B (de) Verfahren zur flotation von erdalkalimetall enthaltendem mineral sowie mittel hiefür
EP0281029B1 (fr) Utilisation de dérivés du tricyclo-[5.3.1.0 2,6]-décène-3 comme agents moussants dans la flottation du charbon et de minerais
WO1991015298A1 (fr) Procede pour obtenir des mineraux a partir de minerais non sulfures par flottation
EP0530233A1 (fr) Procede de recuperation de mineraux contenus dans des minerais non sulfures par flottation
DE4138911A1 (de) Verfahren zur gewinnung von mineralien aus nichtsulfidischen erzen durch flotation
EP0206233B1 (fr) Produits d'addition d'acide phosphinique et de demi-esters d'acide maléique, leur procédé de préparation et leur utilisation

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): AT BE CH DE FR GB IT LI SE

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE CH DE FR GB IT LI SE

17P Request for examination filed

Effective date: 19860908

17Q First examination report despatched

Effective date: 19870626

RBV Designated contracting states (corrected)

Designated state(s): AT DE FR IT SE

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT DE FR IT SE

REF Corresponds to:

Ref document number: 34675

Country of ref document: AT

Date of ref document: 19880615

Kind code of ref document: T

REF Corresponds to:

Ref document number: 3376804

Country of ref document: DE

Date of ref document: 19880707

ET Fr: translation filed
ITF It: translation for a ep patent filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
ITTA It: last paid annual fee
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19921005

Year of fee payment: 10

Ref country code: DE

Payment date: 19921005

Year of fee payment: 10

Ref country code: AT

Payment date: 19921005

Year of fee payment: 10

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 19921014

Year of fee payment: 10

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Effective date: 19931006

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Effective date: 19931007

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Effective date: 19940630

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19940701

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

EUG Se: european patent has lapsed

Ref document number: 83109992.4

Effective date: 19940510