EP0270018A2 - Use of N-alkyl and N-alkenyl-aspartic acids as co-collectors for the flotation of non-sulfidic minerals - Google Patents
Use of N-alkyl and N-alkenyl-aspartic acids as co-collectors for the flotation of non-sulfidic minerals Download PDFInfo
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- EP0270018A2 EP0270018A2 EP87117541A EP87117541A EP0270018A2 EP 0270018 A2 EP0270018 A2 EP 0270018A2 EP 87117541 A EP87117541 A EP 87117541A EP 87117541 A EP87117541 A EP 87117541A EP 0270018 A2 EP0270018 A2 EP 0270018A2
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- alkyl
- acids
- alkenylaspartic
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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
- B03D1/01—Organic compounds containing nitrogen
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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
- B03D1/008—Organic compounds containing oxygen
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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
- B03D1/012—Organic compounds containing sulfur
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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
- B03D2201/00—Specified effects produced by the flotation agents
- B03D2201/02—Collectors
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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
- B03D2203/00—Specified materials treated by the flotation agents; specified applications
- B03D2203/02—Ores
- B03D2203/04—Non-sulfide ores
Definitions
- the invention relates to the use of N-alkyl and / or N-alkenylaspartic acids as co-collectors in the flotation of non-sulfidic ores and a process for separating non-sulfidic ores by flotation.
- Flotation is a generally used sorting process for the processing of mineral raw materials to separate valuable minerals from the gangue.
- Non-sulfidic minerals such as apatite, fluorite, scheelite and other salt-like minerals, cassiterite and other metal oxides, such as titanium or zirconium oxides, as well as certain silicates and aluminosilicates can be prepared by flotation processes.
- the ore is pre-crushed and dry, but preferably ground wet and suspended in water.
- suspensions are usually added to collectors, often in conjunction with auxiliary reagents such as foaming agents, regulators, pushers (deactivators) and / or stimulants (activators), in order to support the separation of the valuable minerals from the gangue components of the ore during the subsequent flotation.
- auxiliary reagents such as foaming agents, regulators, pushers (deactivators) and / or stimulants (activators)
- these reagents are usually allowed to act on the finely ground ore for a certain time (Kon dition). As a result, a foam is generated on the surface of the suspension, the collector ensuring that the surface of the minerals is rendered hydrophobic.
- the mineral-containing foam is stripped off and worked up using known methods.
- the aim of the flotation is to extract the mineral of value from the ores in the highest possible yield, while at the same time maintaining the best possible enrichment.
- Anionic and cationic surfactants are mainly used as collectors in the flotative processing of non-sulfidic ores. These should adsorb as selectively as possible on the valuable mineral surface in order to achieve a high concentration in the flotation concentrate. In addition, the collectors should develop a stable, but not too stable, flotation foam. For ores containing gangue minerals from anionic collectors, e.g. Unsaturated and saturated fatty acids, especially tall oil fatty acids and oleic acids, alkyl sulfates or sulfonates, are not hydrophobicized, these are sufficient as collectors.
- anionic collectors e.g. Unsaturated and saturated fatty acids, especially tall oil fatty acids and oleic acids, alkyl sulfates or sulfonates, are not hydrophobicized, these are sufficient as collectors.
- more selective collectors such as Phosphonic acids (DE-PS 24 43 460 and DD-PS 76 974) or alkylsulfosuccinamides (US-PS 3 830 366) are used.
- Suitable organic phosphonates are water-soluble salts of organic phosphonic acids, for example salts of styrene phosphonic acid, for the flotation of non-sulfidic ores, in particular tin ores. as for example in X. International Mineral Proc. Congress - IMM, E. Tmür, pages 626 to 627, London 1973 (0.S. Bogandow).
- Collectors frequently used in the flotation of non-sulfidic ores are, for example, alkyl monocarboxylic acids, such as unsaturated long-chain fatty acids, such as the tall oil fatty acid mentioned above.
- alkyl monocarboxylic acids such as unsaturated long-chain fatty acids, such as the tall oil fatty acid mentioned above.
- di- and tricarboxylic acids are also used as flotation collectors (H. Schubert, H. Baldauf, A. Serrano, XII International Mineral Proc. Congress, Sao Paulo 1977).
- the anionic and nonionic collectors used for the flotation of non-sulfidic ores do not lead to a satisfactory output of the valuable minerals with economically justifiable collector quantities.
- the present invention was therefore based on the object of providing improved collectors in the sense of a more economical design of the flotation processes, with which larger yields of valuable minerals can be achieved either with constant collector quantities and constant selectivity, or constant mineral mineral yields with reduced collector quantities.
- N-alkyl and / or N-alkenylaspartic acids can advantageously be used as co-collectors in the flotation of non-sulfidic ores.
- the present invention relates to the use of N-alkyl and / or N-alkenylaspartic acids as co-collectors in the flotation of non-sulfidic ores.
- N-alkyl and / or N-alkenyl radicals of the aspartic acids to be used according to the invention can be straight-chain or branched-chain, have 2 to 22 C atoms and optionally have a hydroxyl group and / or an ether bridge instead of a CH2 group.
- N-alkyl and N-alkenylaspartic acids their alkali or ammonium salts can also be used advantageously.
- the corresponding potassium salts and preferably the corresponding sodium salts of N-alkyl and / or N-alkenylaspartic acids are advantageously used.
- the alkyl and / or alkenyl radicals of the N-alkyl and / or N-alkenyl aspartic acids are straight are chain or branched, have 2 to 22 C atoms and optionally have a hydroxyl group and / or an ether bridge instead of a CH2 group, preferably N-alkyl and / or N-alkenylaspartic acids are used, the alkyl and / or alkenyl radicals 8 have up to 18 carbon atoms.
- N-alkyl and / or N-alkenyl amino acids and their alkali or ammonium salts are generally known from the literature. It takes place on the one hand by means of the various alkylation reactions on the nitrogen of the amino acid, as described, for example, in Houben-Weyl Volume 11/2, and on the other hand by adding primary or secondary amines to unsaturated carboxylic acids (J. March "Advanced Organic Chemistry: Reactions, Mechanism and Structure ", McGraw-Hill, 1977).
- the latter process starting from maleic acid esters, is used to prepare the N-alkyl and / or N-alkenylaspartic acids and salts referred to here.
- the maleic acid esters can be reacted with the corresponding amine component either in a solvent (US Pat. No. 2,438,092) or in a solvent-free manner, optionally with the addition of a catalyst, such as, for example, acetic acid, alkali metal thiocyanates or O, N-dialkylphosphocarbamate (SU PS 77 10 87) .
- a catalyst such as, for example, acetic acid, alkali metal thiocyanates or O, N-dialkylphosphocarbamate (SU PS 77 10 87) .
- anionic and / or nonionic collectors can also be used.
- N-alkyl and / or N-Al Kenylaspartic acids used as anionic collectors of tallow alkyl sulfosuccinamides and / or oleic acid.
- a reaction product of propylene glycol glucoside with ⁇ -dodecane epoxide can advantageously be used as the nonionic collector.
- the amounts in which the co-collectors to be used according to the invention are used depend in each case on the type of non-sulfidic ores to be floated and on their content of valuable mineral. As a result, the amounts required can vary within wide limits.
- the co-collectors according to the invention are used in collector mixtures in amounts of 50 to 2000 g / t crude ore.
- the N-alkyl and / or N-alkenylaspartic acids to be used according to the invention are used in combination with anionic, cationic and / or nonionic collectors in the known flotation processes for non-sulfidic ores instead of the known collectors.
- the customary reagents such as foaming agents, regulators, activators, deactivators, etc. are also added to the aqueous slurries of the ground ores.
- the flotation is carried out under the conditions of the methods of the prior art.
- N-alkyl and / or N-alkenylaspartic acids to be used according to the invention can be used, for example, as co-collectors in the flotative processing of Scheelite ore, Cassiterite ore and Fluorite ore.
- Another object of the invention is a process for the separation of non-sulfidic ores by flotation, in which ground ore is mixed with water to form an ore suspension, air is introduced into the suspension in the presence of the collector mixture and the resulting foam is separated off together with the mineral contained therein.
- This process is characterized in that N-alkyl and / or N-alkenylaspartic acids are used as co-collectors.
- the ore sample has the following grain size distribution: 28% - 25 ⁇ m 43% 25-100 ⁇ m 29% 100-200 ⁇ m
- Combinations of a sulfosuccinamide derived from a tallow amine with sodium salts of N-alkylaspartic acids in a weight ratio of 2: 1 were used as collector mixtures according to the invention.
- the chain length of the N-alkylaspartic acids was C 16/18 (example 1) and C 12/14 (example 2).
- the above-mentioned tallow alkyl sulfosuccinamide (Comparative Example 1) was used as the comparative collector.
- the flotation experiments were carried out using a Humbold-Wedag laboratory flotation machine from KHD Industrieanlagen AG, Humbold-Wedag, Cologne (see Seifen-Fette-Wwachs 105) (1979), p. 248) in a 1 1 flotation cell.
- Deionized water was used to make the slurry.
- the cloud density was 400 g / l.
- Water glass with a dosage of 2,000 g / t was used as the pusher.
- the conditioning time of the pusher was 10 min at a stirring speed of 2,000 l / min.
- the type of collector dosage is shown in Table 1.
- the conditioning time of the collector was 3 minutes.
- a valuable South African cassiterite ore was floated, which essentially contains granite, tourmaline and magnetite as a gait.
- the flotation task had the following grain size distribution: 49.5% - 25 ⁇ m 43.8% 25-63 ⁇ m 6.7% + 63 ⁇ m
- the flotation experiments were carried out in a 1 1 laboratory flotation cell at room temperature. Water glass with a dosage of 2,000 g / t was used as the pusher, the pH of the slurry was adjusted to pH 5 with sulfuric acid before the addition of the collector. Flotation was carried out with a turbidity of 500 g ore per liter of tap water with a hardness of 16 ° dH. The flotation time of the pre-flotation was 4 min at a stirring speed of 1200 l / min.
- the Na salt of N-tallow alkyl aspartic acid with a chain length of 16 to 18 carbon atoms was used as the co-collector according to the invention.
- the mixing ratio of collector to co-collector was 1: 2 (example 3).
- Technical styrenephosphonic acid was used for comparative example 2.
- a Mexican fluorite ore was floated with predominantly silicates as gait.
- the flotation task had the following grain size distribution: 35% - 25 ⁇ m 50% 25-80 ⁇ m 15% + 80 ⁇ m
- the pre-flotation concentrate was further ground before the subsequent cleaning stages.
- the grain size was then: 98% - 44 ⁇ m
- the flotation experiments were carried out in a 1 1 Denver cell using extremely hard water (350 ° dH).
- the trigger was alkaline-digested starch with a dosage of 1,000 g / t.
- the Na salt of N-tallow alkyl aspartic acid with a chain length of 16 to 18 carbon atoms in combination with oleic acid in a ratio of 1: 9 was used as the co-collector according to the invention (example 4).
- the standard collector was oleic acid (Comparative Example 3).
Abstract
Description
Die Erfindung betrifft die Verwendung von N-Alkyl- und/oder N-Alkenylasparaginsäuren als Co-Sammler bei der Flotation von nichtsulfidischen Erzen und ein Verfahren zur Abtrennung von nichtsulfidischen Erzen durch Flotation.The invention relates to the use of N-alkyl and / or N-alkenylaspartic acids as co-collectors in the flotation of non-sulfidic ores and a process for separating non-sulfidic ores by flotation.
Zur Abtrennung von Wertmineralen von der Gangart ist die Flotation ein allgemein angewandtes Sortierverfahren für die Aufarbeitung von mineralischen Rohstoffen. Nichtsulfidische Minerale, wie beispielsweise Apatit, Fluorit, Scheelit und andere salzartige Mineralien, Cassiterit und andere Metalloxide, wie Titan- oder Zirkonoxide, sowie bestimmte Silikate und Alumosilikate können durch Flotationsverfahren aufbereitet werden. Zur Flotation wird das Erz vorzerkleinert und trocken, vorzugsweise aber naß vermahlen und in Wasser suspendiert. Diesen Suspensionen werden üblicherweise Sammler, häufig in Verbindung mit Hilfsreagenzien wie Schäumern, Reglern, Drückern (Desaktivatoren) und oder Belebern (Aktivatoren) zugesetzt, um die Abtrennung der Wertminerale von den Gangartbestandteilen des Erzes bei der anschließenden Flotation zu unterstützen. Bevor in die Suspension Luft eingeblasen wird (Flotieren) läßt man diese Reagenzien üblicherweise eine gewisse Zeit auf das feingemahlene Erz einwirken (Kon ditionieren). Dadurch wird an der Oberfläche der Suspension ein Schaum erzeugt, wobei der Sammler für eine Hydrophobierung der Oberfläche der Minerale sorgt. Die Minerale haften an den während der Belüftung gebildeten Gasblasen, wobei die Hydrophobierung der Mineralbestandteile selektiv in der Weise erfolgt, daß die unerwünschten Erzbestandteile nicht an den Gasblasen haften. Der mineralhaltige Schaum wird abgestreift und nach bekannten Verfahren aufgearbeitet. Ziel der Flotation ist, das Wertmineral der Erze in möglichst hoher Ausbeute zu gewinnen, dabei aber gleichzeitig eine möglichst gute Anreicherung zu erhalten.Flotation is a generally used sorting process for the processing of mineral raw materials to separate valuable minerals from the gangue. Non-sulfidic minerals, such as apatite, fluorite, scheelite and other salt-like minerals, cassiterite and other metal oxides, such as titanium or zirconium oxides, as well as certain silicates and aluminosilicates can be prepared by flotation processes. For the flotation, the ore is pre-crushed and dry, but preferably ground wet and suspended in water. These suspensions are usually added to collectors, often in conjunction with auxiliary reagents such as foaming agents, regulators, pushers (deactivators) and / or stimulants (activators), in order to support the separation of the valuable minerals from the gangue components of the ore during the subsequent flotation. Before air is blown into the suspension (flotation), these reagents are usually allowed to act on the finely ground ore for a certain time (Kon dition). As a result, a foam is generated on the surface of the suspension, the collector ensuring that the surface of the minerals is rendered hydrophobic. The minerals adhere to the gas bubbles formed during the aeration, the hydrophobicization of the mineral components taking place selectively in such a way that the undesired ore components do not adhere to the gas bubbles. The mineral-containing foam is stripped off and worked up using known methods. The aim of the flotation is to extract the mineral of value from the ores in the highest possible yield, while at the same time maintaining the best possible enrichment.
Bei der flotativen Aufbereitung nichtsulfidischer Erze werden überwiegend anionische und kationische Tenside als Sammler eingesetzt. Diese sollen an der Wertmineraloberfläche möglichst selektiv adsorbieren, um eine hohe Anreicherung im Flotationskonzentrat zu erzielen. Außerdem sollen die Sammler einen tragfähigen, aber nicht zu stabilen Flotationsschaum entwickeln. Für Erze, die Gangartminerale enthalten, die von anionischen Sammlern, wie z.B. ungesättigten und gesättigten Fettsäuren, insbesondere Tallölfettsäuren und Ölsäuren, Alkylsulfate oder -sulfonate, nicht hydrophobiert werden, genügen diese als Sammler. Für schwieriger zu flotierende Erze, wie beispielsweise Zinnerze, werden selektivere Sammler, wie z.B. Phosphonsäuren (DE-PS 24 43 460 und DD-PS 76 974) oder Alkylsulfosuccinamide (US-PS 3 830 366) eingesetzt.Anionic and cationic surfactants are mainly used as collectors in the flotative processing of non-sulfidic ores. These should adsorb as selectively as possible on the valuable mineral surface in order to achieve a high concentration in the flotation concentrate. In addition, the collectors should develop a stable, but not too stable, flotation foam. For ores containing gangue minerals from anionic collectors, e.g. Unsaturated and saturated fatty acids, especially tall oil fatty acids and oleic acids, alkyl sulfates or sulfonates, are not hydrophobicized, these are sufficient as collectors. For more difficult to float ores, such as tin ore, more selective collectors, such as Phosphonic acids (DE-PS 24 43 460 and DD-PS 76 974) or alkylsulfosuccinamides (US-PS 3 830 366) are used.
Als organische Phosphonate kommen wasserlösliche Salze von organischen Phosphonsäuren, beispielsweise Salze der Styrolphosphonsäure, zur Flotation von nichtsulfidischen Erzen, insbesondere Zinnerzen, in betracht, wie sie beispielsweise in X. International Mineral Proc. Congress - IMM, E. Töpfer, Seite 626 bis 627, London 1973 (0.S. Bogandow) beschrieben sind.Suitable organic phosphonates are water-soluble salts of organic phosphonic acids, for example salts of styrene phosphonic acid, for the flotation of non-sulfidic ores, in particular tin ores. as for example in X. International Mineral Proc. Congress - IMM, E. Töpfer, pages 626 to 627, London 1973 (0.S. Bogandow).
Bei der Flotation nichtsulfidischer Erze häufig verwendete Sammler sind beispielsweise Alkylmonocarbonsäuren, wie beispielsweise ungesättigte langkettige Fettsäuren, wie die oben genannte Tallölfettsäure. Es werden aber auch Di- und Tricarbonsäuren als Sammler für die Flotation eingesetzt (H. Schubert, H. Baldauf, A. Serrano, XII International Mineral Proc. Congress, Sao Paulo 1977).Collectors frequently used in the flotation of non-sulfidic ores are, for example, alkyl monocarboxylic acids, such as unsaturated long-chain fatty acids, such as the tall oil fatty acid mentioned above. However, di- and tricarboxylic acids are also used as flotation collectors (H. Schubert, H. Baldauf, A. Serrano, XII International Mineral Proc. Congress, Sao Paulo 1977).
Viele Sammler für nichtsulfidische Erze entwickeln wegen ihres Tensidcharakters selbst einen für die Flotation geeigneten Schaum. Es kann jedoch auch notwendig sein, durch spezielle Schäumer einen Schaum zu entwickeln oder den Schaum in geeigneter Weise zu modifizieren. Bekannte Schäumer für die Flotation sind Alkohole mit 4 bis 10 C-Atomen, Propylenglykole, Polyethylenglykol- oder Polypropylenglykolether, Terpenalkohole (Pine Oils) und Kresylsäuren. Soweit erforderlich, werden den zu flotierenden Suspensionen (Trüben) modifizierende Reagenzien zugegeben, beispielsweise Regler für den pH-Wert, Aktivatoren für das im Schaum zu gewinnende Mineral oder Drücker für die im Schaum unerwünschten Minerale und gegebenenfalls auch Dispergatoren.Many collectors for non-sulfidic ores develop a foam suitable for flotation because of their surfactant character. However, it may also be necessary to develop a foam by means of special foamers or to modify the foam in a suitable manner. Known foamers for flotation are alcohols with 4 to 10 carbon atoms, propylene glycols, polyethylene glycol or polypropylene glycol ethers, terpene alcohols (pine oils) and cresyl acids. If necessary, modifying reagents are added to the suspensions (turbidity) to be floated, for example regulators for the pH value, activators for the mineral to be obtained in the foam or pushers for the minerals undesirable in the foam and optionally also dispersants.
Die für die Flotation von nichtsulfidischen Erzen eingesetzten anionischen und nichtionischen Sammler führen in vielen Fällen bei ökonomisch vertretbaren Sammlermengen nicht zu einem befriedigenden Ausbringen der Wertminerale.In many cases, the anionic and nonionic collectors used for the flotation of non-sulfidic ores do not lead to a satisfactory output of the valuable minerals with economically justifiable collector quantities.
Der vorliegenden Erfindung lag deshalb die Aufgabe zugrunde, im Sinne einer wirtschaftlicheren Gestaltung der Flotationsprozesse verbesserte Sammler zur Verfügung zu stellen, mit denen entweder bei gleichbleibenden Sammlermengen und gleichbleibender Selektivität größere Ausbeuten an Wertmineralen, oder bei verminderten Sammlermengen gleichbleibende Wertmineralausbeuten erzielt werden.The present invention was therefore based on the object of providing improved collectors in the sense of a more economical design of the flotation processes, with which larger yields of valuable minerals can be achieved either with constant collector quantities and constant selectivity, or constant mineral mineral yields with reduced collector quantities.
Es wurde überraschend gefunden, daß N-Alkyl- und/oder N-Alkenylasparaginsäuren als Co-Sammler bei der Flotation von nichtsulfidischen Erzen in vorteilhafter Weise verwendet werden können.It has surprisingly been found that N-alkyl and / or N-alkenylaspartic acids can advantageously be used as co-collectors in the flotation of non-sulfidic ores.
Gegenstand der vorliegenden Erfindung ist die Verwendung von N-Alkyl- und/oder N-Alkenylasparaginsäuren als Co-Sammler bei der Flotation von nichtsulfidischen Erzen.The present invention relates to the use of N-alkyl and / or N-alkenylaspartic acids as co-collectors in the flotation of non-sulfidic ores.
Die N-Alkyl- und/oder N-Alkenylreste der erfindungsgemäß einzusetzenden Asparaginsäuren können geradkettig oder verzweigtkettig sein, 2 bis 22 C-Atome besitzen und gegebenenfalls eine Hydroxylgruppe und/oder anstelle einer CH₂-Gruppe eine Etherbrücke aufweisen.The N-alkyl and / or N-alkenyl radicals of the aspartic acids to be used according to the invention can be straight-chain or branched-chain, have 2 to 22 C atoms and optionally have a hydroxyl group and / or an ether bridge instead of a CH₂ group.
Neben den freien Säuren der N-Alkyl- und N-Alkenylasparaginsäuren können auch deren Alkali- bzw. Ammoniumsalze vorteilhaft verwendet werden. In vorteilhafter Weise werden die entsprechenden Kaliumsalze und vorzugsweise die entsprechenden Natriumsalze der N-Alkyl- und/oder N-Alkenylasparaginsäuren eingesetzt.In addition to the free acids of N-alkyl and N-alkenylaspartic acids, their alkali or ammonium salts can also be used advantageously. The corresponding potassium salts and preferably the corresponding sodium salts of N-alkyl and / or N-alkenylaspartic acids are advantageously used.
Während üblicherweise die Alkyl- und/oder Alkenylreste der N-Alkyl- und/oder N-Alkenylasparaginsäuren gerad kettig oder verzweigt sind, 2 bis 22 C-Atome besitzen und gegebenenfalls eine Hydroxylgruppe und/oder anstelle einer CH₂-Gruppe eine Etherbrücke aufweisen, werden vorzugsweise N-Alkyl- und/oder N-Alkenylasparaginsäuren eingesetzt, deren Alkyl- und/oder Alkenylreste 8 bis 18 C-Atome aufweisen.While usually the alkyl and / or alkenyl radicals of the N-alkyl and / or N-alkenyl aspartic acids are straight are chain or branched, have 2 to 22 C atoms and optionally have a hydroxyl group and / or an ether bridge instead of a CH₂ group, preferably N-alkyl and / or N-alkenylaspartic acids are used, the alkyl and / or alkenyl radicals 8 have up to 18 carbon atoms.
Die Herstellung von N-Alkyl- und/oder N-Alkenylaminosäuren sowie ihrer Alkali- bzw. Ammoniumsalze ist allgemein aus der Literatur bekannt. Sie erfolgt zum einen mittels der verschiedenen Alkylierungsreaktionen am Stickstoff der Aminosäure, wie beispielsweise beschrieben in Houben-Weyl Band 11/2, zum anderen durch die Addition von primären oder sekundären Aminen an ungesättigte Carbonsäuren (J. March "Advanced Organic Chemistry: Reactions, Mechanism and Structure", McGraw-Hill, 1977).The preparation of N-alkyl and / or N-alkenyl amino acids and their alkali or ammonium salts is generally known from the literature. It takes place on the one hand by means of the various alkylation reactions on the nitrogen of the amino acid, as described, for example, in Houben-Weyl Volume 11/2, and on the other hand by adding primary or secondary amines to unsaturated carboxylic acids (J. March "Advanced Organic Chemistry: Reactions, Mechanism and Structure ", McGraw-Hill, 1977).
Zur Darstellung der hier bezeichneten N-Alkyl- und/oder N-Alkenylasparaginsäuren und -salze wird das letzere Verfahren, ausgehend von Maleinsäureestern, angewandt. Dabei können die Maleinsäureester mit der entsprechenden Aminkomponente entweder in einem Lösungsmittel (US-PS 2 438 092) oder lösungsmittelfrei, gegebenenfalls unter Zusatz eines Katalysators, wie beispielsweise Essigsäure, Alkalimetallthiocyanate oder O,N-Dialkylphosphocarbamate (SU-PS 77 10 87) umgesetzt werden.The latter process, starting from maleic acid esters, is used to prepare the N-alkyl and / or N-alkenylaspartic acids and salts referred to here. The maleic acid esters can be reacted with the corresponding amine component either in a solvent (US Pat. No. 2,438,092) or in a solvent-free manner, optionally with the addition of a catalyst, such as, for example, acetic acid, alkali metal thiocyanates or O, N-dialkylphosphocarbamate (SU PS 77 10 87) .
Erfindungsgemäß können neben N-Alkyl- und/oder N-Alkenylasparaginsäuren im Verhältnis von 20 : 1 bis 1 : 20 zusätzlich anionische und/oder nichtionische Sammler eingesetzt werden.According to the invention, in addition to N-alkyl and / or N-alkenylaspartic acids in a ratio of 20: 1 to 1:20, anionic and / or nonionic collectors can also be used.
Gemäß einer bevorzugten Ausführungsform der vorliegenden Erfindung werden neben N-Alkyl- und/oder N-Al kenylasparaginsäuren als anionische Sammler Talgalkylsulfosuccinamide und/oder Ölsäure eingesetzt.According to a preferred embodiment of the present invention, in addition to N-alkyl and / or N-Al Kenylaspartic acids used as anionic collectors of tallow alkyl sulfosuccinamides and / or oleic acid.
Als nichtionischer Sammler kann beispielsweise ein Umsetzungsprodukt aus Propylenglykolglucosid mit α-Dodecanepoxid mit Vorteil eingesetzt werden.A reaction product of propylene glycol glucoside with α-dodecane epoxide, for example, can advantageously be used as the nonionic collector.
Die Mengen, in denen die erfindungsgemäß zu verwendenden Co-Sammler eingesetzt werden, hängen jeweils von der Art der zu flotierenden nichtsulfidischen Erze und von deren Gehalt an Wertmineral ab. Demzufolge können die jeweils notwendigen Einsatzmengen in weiten Grenzen schwanken. Im allgemeinen werden die erfindungsgemäßen Co-Sammler in Sammlergemischen in Mengen von 50 bis 2000 g/t Roherz eingesetzt.The amounts in which the co-collectors to be used according to the invention are used depend in each case on the type of non-sulfidic ores to be floated and on their content of valuable mineral. As a result, the amounts required can vary within wide limits. In general, the co-collectors according to the invention are used in collector mixtures in amounts of 50 to 2000 g / t crude ore.
In der Praxis werden die erfindungsgemäß zu verwendenden N-Alkyl- und/oder N-Alkenylasparaginsäuren in Kombination mit anionischen, kationischen und/oder nichtionischen Sammlern in den bekannten Flotationsverfahren für nichtsulfidische Erze anstelle der bekannten Sammler eingesetzt. Demgemäß werden auch hier neben den Sammlergemischen die jeweils gebräuchlichen Reagenzien wie Schäumer, Regler, Aktivatoren, Desaktivatoren usw. den wäßrigen Aufschlämmungen der vermahlenen Erze zugesetzt. Die Durchführung der Flotation erfolgt unter den Bedingungen der Verfahren des Standes der Technik.In practice, the N-alkyl and / or N-alkenylaspartic acids to be used according to the invention are used in combination with anionic, cationic and / or nonionic collectors in the known flotation processes for non-sulfidic ores instead of the known collectors. Accordingly, in addition to the collector mixtures, the customary reagents such as foaming agents, regulators, activators, deactivators, etc. are also added to the aqueous slurries of the ground ores. The flotation is carried out under the conditions of the methods of the prior art.
In diesem Zusammenhang sei auf die folgenden Literaturstellen zur Technologie der Erzaufbereitung verwiesen: A. Schubert, Aufbereitung fester mineralischer Rohstoffe, Leipzig 1967; B. Wills, Mineral Processing Technology, New York, 1978; D. B. Purchas (ed.), Solid/Liquid Separation Equipment Scale-Up, Croydon 1977; E. S. Perry, C. J. van Oss, E. Grushka (ed.), Separation and Purification Methods, New York 1973-1978.In this context, reference is made to the following references on ore processing technology: A. Schubert, Processing of Solid Mineral Raw Materials, Leipzig 1967; B. Wills, Mineral Processing Technology, New York, 1978; DB Purchas (ed.), Solid / Liquid Separation Equipment Scale-Up, Croydon 1977; ES Perry, CJ van Oss, E. Grushka (ed.), Separation and Purification Methods, New York 1973-1978.
Die erfindungsgemäß zu verwendenden N-Alkyl- und/oder N-Alkenylasparaginsäuren können beispielsweise als Co-Sammler eingesetzt werden bei der flotativen Aufarbeitung von Scheeliterz, Cassiteriterz und Fluoriterz.The N-alkyl and / or N-alkenylaspartic acids to be used according to the invention can be used, for example, as co-collectors in the flotative processing of Scheelite ore, Cassiterite ore and Fluorite ore.
Weiterer Gegenstand der Erfindung ist ein Verfahren zur Abtrennung von nichtsulfidischen Erzen durch Flotation, bei dem man gemahlenes Erz mit Wasser zu einer Erzsuspension vermischt, in die Suspension in Gegenwart des Sammlergemisches Luft einleitet und den entstandenen Schaum zusammen mit dem darin enthaltenen Mineral abtrennt. Dieses Verfahren ist dadurch gekennzeichnet, daß man als Co-Sammler N-Alkyl- und/oder N-Alkenylasparaginsäuren einsetzt.Another object of the invention is a process for the separation of non-sulfidic ores by flotation, in which ground ore is mixed with water to form an ore suspension, air is introduced into the suspension in the presence of the collector mixture and the resulting foam is separated off together with the mineral contained therein. This process is characterized in that N-alkyl and / or N-alkenylaspartic acids are used as co-collectors.
Die nachfolgenden Beispiele zeigen die Überlegenheit der erfindungsgemäß zu verwendenden Co-Sammler. Unter Laborbedingungen wurde teilweise mit erhöhten Sammlerkonzentrationen gearbeitet, die in der Praxis zum Teil erheblich unterschritten werden können. Die Anwendungsmöglichkeiten und Anwendungsbedingungen sind daher nicht auf die in den Beispielen beschriebenen Trennaufgaben und Versuchsbedingungen beschränkt. Alle Prozentangaben beziehen sich, sofern nicht anders angegeben, auf Gewichtsprozent. Die Mengenangaben für Reagenzien beziehen sich jeweils auf Aktivsubstanz.The following examples show the superiority of the co-collectors to be used according to the invention. Under laboratory conditions, increased collector concentrations were used in some cases, which in practice can sometimes be significantly lower. The possible uses and conditions of use are therefore not limited to the separation tasks and test conditions described in the examples. Unless otherwise stated, all percentages relate to percent by weight. The amounts of reagents are based on the active substance.
Zu 259 g technischen Talgamins (16 bis 18 C-Atome) und 6 g Eisessig wurden bei 60°C 172 g Maleinsäurediethylester getropft, wobei die Innentemperatur 70°C nicht überschritt. Die Reaktionslösung wurde 5 h 70°C belassen und dann auf 90°C erwärmt. Man fügte 80 g NaOH, gelöst in 970 ml Wasser, hinzu und hielt die Temperatur für 1 h bei 85 bis 90°C.172 g of diethyl maleate were added dropwise to 259 g of technical tallow amine (16 to 18 carbon atoms) and 6 g of glacial acetic acid at 60 ° C., the internal temperature not exceeding 70 ° C. The reaction solution became 70 ° C for 5 h leave and then heated to 90 ° C. 80 g of NaOH, dissolved in 970 ml of water, were added and the temperature was kept at 85 to 90 ° C. for 1 h.
Als Flotationsaufgabe wurde ein Scheeliterz aus Österreich mit der nachstehenden chemischen Zusammensetzung, bezogen auf die Hauptbestandteile, eingesetzt:
WO₃ 0,3 %
CaO 8,8 %
SiO₂ 55,8 %A Scheelite ore from Austria with the following chemical composition, based on the main components, was used as the flotation task:
WO₃ 0.3%
CaO 8.8%
SiO₂ 55.8%
Die Erzprobe weist folgende Korngrößenverteilung auf:
28 % - 25 µm
43 % 25 - 100 µm
29 % 100 - 200 µmThe ore sample has the following grain size distribution:
28% - 25 µm
43% 25-100 µm
29% 100-200 µm
Als erfindungsgemäße Sammlergemische dienten Kombinationen eines von einem Talgamin abgeleiteten Sulfosuccinamids mit Natriumsalzen der N-Alkylasparaginsäuren im Gewichtsverhältnis 2 : 1. Die Kettenlänge der N-Alkylasparaginsäuren war C16/18 (Beispiel 1) bzw. C12/14 (Beispiel 2). Als Vergleichssammler wurde das oben genannte Talgalkylsulfosuccinamid (Vergleichsbeispiel 1) herangezogen.Combinations of a sulfosuccinamide derived from a tallow amine with sodium salts of N-alkylaspartic acids in a weight ratio of 2: 1 were used as collector mixtures according to the invention. The chain length of the N-alkylaspartic acids was C 16/18 (example 1) and C 12/14 (example 2). The above-mentioned tallow alkyl sulfosuccinamide (Comparative Example 1) was used as the comparative collector.
Die Flotationsversuche wurden mit einer Humbold-Wedag-Laborflotationsmaschine der Firma KHD Industrieanlagen AG, Humbold-Wedag, Köln (s. Seifen-Fette-Wachse 105 (1979), S. 248) in einer 1 1-Flotationszelle durchgeführt. Zur Herstellung der Trübe wurde entionisiertes Wasser verwendet. Die Trübedichte betrug 400 g/l. Als Drücker wurde Wasserglas mit einer Dosierung von 2 000 g/t eingesetzt. Die Konditionierzeit des Drückers betrug 10 min bei einer Rührgeschwindigkeit von 2 000 l/min.The flotation experiments were carried out using a Humbold-Wedag laboratory flotation machine from KHD Industrieanlagen AG, Humbold-Wedag, Cologne (see Seifen-Fette-Wwachs 105) (1979), p. 248) in a 1 1 flotation cell. Deionized water was used to make the slurry. The cloud density was 400 g / l. Water glass with a dosage of 2,000 g / t was used as the pusher. The conditioning time of the pusher was 10 min at a stirring speed of 2,000 l / min.
Es wurde bei dem sich aus der Wasserglaszugabe ergebenden pH-Wert von ca. 9,5 flotiert. Die Art der Sammlerdosierung ist aus der Tabelle 1 ersichtlich. Die Konditionierzeit des Sammlers lag bei 3 min.It was floated at the pH value of approximately 9.5 resulting from the addition of water glass. The type of collector dosage is shown in Table 1. The conditioning time of the collector was 3 minutes.
Die Ergebnisse der Tabelle 1 zeigen, daß mit den erfindungsgemäßen Sammlerkombinationen eine deutlich höhere Anreicherung und ein besseres Ausbringen erzielt werden als mit dem Alkylsulfosuccinamid des Vergleichsbeispiels 1 allein.
Flotiert wurde ein wertmineralarmes südafrikanisches Cassiteriterz, das im wesentlichen Granit, Turmalin und Magnetit als Gangart enthält. Die Flotationsaufgabe hatte folgende Korngrößenverteilung:
49,5 % - 25 µm
43,8 % 25 - 63 µm
6,7 % + 63 µmA valuable South African cassiterite ore was floated, which essentially contains granite, tourmaline and magnetite as a gait. The flotation task had the following grain size distribution:
49.5% - 25 µm
43.8% 25-63 µm
6.7% + 63 µm
Die Flotationsversuche wurden in einer 1 1 Laborflotationszelle bei Raumtemperatur durchgeführt. Als Drücker wurde Wasserglas mit einer Dosierung von 2 000 g/t verwendet, der pH-Wert der Trübe wurde mit Schwefelsäure vor der Sammlerzugabe auf pH 5 eingestellt. Flotiert wurde mit einer Trübedichte von 500 g Erz pro Liter Leitungswasser mit einer Härte von 16 °dH. Die Flotationszeit der Vorflotation betrug 4 min bei einer Rührgeschwindigkeit von 1 200 l/min.The flotation experiments were carried out in a 1 1 laboratory flotation cell at room temperature. Water glass with a dosage of 2,000 g / t was used as the pusher, the pH of the slurry was adjusted to pH 5 with sulfuric acid before the addition of the collector. Flotation was carried out with a turbidity of 500 g ore per liter of tap water with a hardness of 16 ° dH. The flotation time of the pre-flotation was 4 min at a stirring speed of 1200 l / min.
Als erfindungsgemäßer Co-Sammler wurde das Na-Salz der N-Talgalkylasparaginsäure mit einer Kettenlänge von 16 bis 18 C-Atomen eingesetzt. Als Sammler diente ein Propylenglykolglucosid, umgesetzt mit α-Dodecanepoxid. Das Mischungsverhältnis von Sammler zu Co-Sammler betrug 1 : 2 (Beispiel 3). Für das Vergleichsbeispiel 2 wurde technische Styrolphosphonsäure herangezogen.The Na salt of N-tallow alkyl aspartic acid with a chain length of 16 to 18 carbon atoms was used as the co-collector according to the invention. A propylene glycol glucoside, reacted with α-dodecane epoxide, served as the collector. The mixing ratio of collector to co-collector was 1: 2 (example 3). Technical styrenephosphonic acid was used for comparative example 2.
Im Vergleich zur Styrolphosphonsäure kann mit dem erfindungsgemäßen Co-Sammler in Kombination mit dem Alkylglucosid ein höherer SnO₂-Gehalt im Konzentrat erzielt werden, wobei trotz niedrigerer Sammlerdosierung das Metallausbringen gleich bleibt (Tabelle 2).
Flotiert wurde ein mexikanisches Fluoriterz mit überwiegend Silikaten als Gangart. Die Flotationsaufgabe hatte folgende Korngrößenverteilung:
35 % - 25 µm
50 % 25 - 80 µm
15 % + 80 µmA Mexican fluorite ore was floated with predominantly silicates as gait. The flotation task had the following grain size distribution:
35% - 25 µm
50% 25-80 µm
15% + 80 µm
Das Konzentrat der Vorflotation wurde vor den nachfolgenden Reinigungsstufen weiter aufgemahlen. Die Korngröße betrug dann:
98 % - 44 µmThe pre-flotation concentrate was further ground before the subsequent cleaning stages. The grain size was then:
98% - 44 µm
Die Flotationsversuche wurden in einer 1 1-Denverzelle unter Verwendung von extrem hartem Wasser (350 °dH) durchgeführt. Der Drücker war alkalisch aufgeschlossene Stärke mit einer Dosierung von 1 000 g/t.The flotation experiments were carried out in a 1 1 Denver cell using extremely hard water (350 ° dH). The trigger was alkaline-digested starch with a dosage of 1,000 g / t.
Verwendet wurde als erfindungsgemäßer Co-Sammler das Na-Salz der N-Talgalkylasparaginsäure mit einer Kettenlänge von 16 bis 18 C-Atomen in Kombination mit Ölsäure im Verhältnis 1 : 9 (Beispiel 4). Der Standardsammler war Ölsäure (Vergleichsbeispiel 3).The Na salt of N-tallow alkyl aspartic acid with a chain length of 16 to 18 carbon atoms in combination with oleic acid in a ratio of 1: 9 was used as the co-collector according to the invention (example 4). The standard collector was oleic acid (Comparative Example 3).
Aus den Ergebnissen in der Tabelle 3 ist ersichtlich, daß die Kombination des erfindungsgemäßen Co-Sammlers mit Ölsäure bei verringerter Dosierung ein besseres Fluoritausbringen und einen höheren Konzentratgehalt ergibt.
Claims (11)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT87117541T ATE77262T1 (en) | 1986-12-05 | 1987-11-27 | USE OF N-ALKYL AND NALKENYLASPARAGIC ACIDS AS CO-COLLECTORS FOR THE FLOTATION OF NON-SULPHIDE ORES. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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DE3641579 | 1986-12-05 | ||
DE19863641579 DE3641579A1 (en) | 1986-12-05 | 1986-12-05 | N-ALKYL- AND N-ALKENYLASPARAGINIC ACIDS AS CO-COLLECTORS FOR THE FLOTATION OF NON-SULFIDIC ORES |
Publications (3)
Publication Number | Publication Date |
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EP0270018A2 true EP0270018A2 (en) | 1988-06-08 |
EP0270018A3 EP0270018A3 (en) | 1990-04-18 |
EP0270018B1 EP0270018B1 (en) | 1992-06-17 |
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EP87117541A Expired - Lifetime EP0270018B1 (en) | 1986-12-05 | 1987-11-27 | Use of n-alkyl and n-alkenyl-aspartic acids as co-collectors for the flotation of non-sulfidic minerals |
Country Status (13)
Country | Link |
---|---|
US (1) | US4790932A (en) |
EP (1) | EP0270018B1 (en) |
CN (1) | CN1011296B (en) |
AT (1) | ATE77262T1 (en) |
AU (1) | AU601244B2 (en) |
BR (1) | BR8706570A (en) |
CA (1) | CA1320769C (en) |
DE (2) | DE3641579A1 (en) |
ES (1) | ES2031869T3 (en) |
FI (1) | FI84321C (en) |
MX (1) | MX169159B (en) |
PT (1) | PT86278B (en) |
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Cited By (1)
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US5540336A (en) * | 1991-10-04 | 1996-07-30 | Henkel Kommanditgesellschaft Auf Aktien | Method of producing iron ore concentrates by froth flotation |
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SE467239B (en) * | 1989-04-05 | 1992-06-22 | Berol Nobel Ab | PROCEDURES FOR FLOTATION OF SOIL METAL CONTAINING MINERAL AND AGENTS |
SE0302986D0 (en) * | 2003-11-13 | 2003-11-13 | Akzo Nobel Nv | Use of a derivative of aspartic acid as a collector in froth flotation processes |
CN102120592B (en) * | 2011-04-25 | 2012-03-21 | 化工部长沙设计研究院 | Method for extracting lithium carbonate by flotation of mixed salt of NaCl and lithium carbonate |
RU2564550C1 (en) * | 2014-03-12 | 2015-10-10 | Общество с ограниченной ответственностью "ЗабТехноКом" | Method of flotation of fluorite ores |
AU2017346939B2 (en) * | 2016-10-20 | 2022-06-23 | Newsouth Innovations Pty Limited | Method for removing heavy metals from an aqueous solution |
WO2018114741A1 (en) * | 2016-12-23 | 2018-06-28 | Akzo Nobel Chemicals International B.V. | Process to treat phosphate ores |
CN107520058B (en) * | 2017-08-23 | 2019-05-17 | 中南大学 | A kind of rutile ore dressing composite reagent and its beneficiation method |
CN112237996B (en) * | 2020-09-27 | 2021-08-17 | 中南大学 | Flotation inhibitor for separating fine stibnite and pyrite and application thereof |
CA3232104A1 (en) * | 2021-09-09 | 2023-03-16 | Clariant International Ltd | Composition and method for use of 1-alkyl-5-oxopyrrolidine-3-carboxylic acids as collectors for phosphate and lithium flotation |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2200220A (en) * | 1936-06-06 | 1940-05-07 | Ig Farbenindustrie Ag | Nu-substituted aspartic acids and their functional derivatives and process of producig them |
FR2313128A1 (en) * | 1975-06-06 | 1976-12-31 | American Cyanamid Co | PROCESS FOR ENRICHING MINES OTHER THAN SULPHIDES BY FLOTATION |
GB2037619A (en) * | 1978-12-04 | 1980-07-16 | Engelhard Min & Chem | Tin flotation |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DD76974A (en) * | ||||
US2438091A (en) * | 1943-09-06 | 1948-03-16 | American Cyanamid Co | Aspartic acid esters and their preparation |
US3753990A (en) * | 1972-01-17 | 1973-08-21 | Procter & Gamble | Phenylbismuth bis(2-pyridinethiol 1-oxide) |
US3830366A (en) * | 1972-03-24 | 1974-08-20 | American Cyanamid Co | Mineral flotation with sulfosuccinamate and depressent |
US3937807A (en) * | 1973-03-06 | 1976-02-10 | The Procter & Gamble Company | Oral compositions for plaque, caries, and calculus retardation with reduced staining tendencies |
US3988433A (en) * | 1973-08-10 | 1976-10-26 | The Procter & Gamble Company | Oral compositions for preventing or removing stains from teeth |
DE2443460A1 (en) * | 1974-09-11 | 1976-03-25 | Johannes Winkler | Mine shield support system - has roofbar held parallel to floor bar at all heights by kinetic linkage |
US4000080A (en) * | 1974-10-11 | 1976-12-28 | The Procter & Gamble Company | Low phosphate content detergent composition |
US4199064A (en) * | 1977-12-21 | 1980-04-22 | American Cyanamid Company | Process for beneficiating non-sulfide minerals |
US4213961A (en) * | 1978-03-23 | 1980-07-22 | Beecham, Inc. | Oral compositions |
US4472297A (en) * | 1982-03-01 | 1984-09-18 | The Procter & Gamble Company | Shampoo compositions containing hydroxypropyl guar gum |
-
1986
- 1986-12-05 DE DE19863641579 patent/DE3641579A1/en not_active Withdrawn
-
1987
- 1987-11-27 EP EP87117541A patent/EP0270018B1/en not_active Expired - Lifetime
- 1987-11-27 AT AT87117541T patent/ATE77262T1/en not_active IP Right Cessation
- 1987-11-27 ES ES198787117541T patent/ES2031869T3/en not_active Expired - Lifetime
- 1987-11-27 DE DE8787117541T patent/DE3779878D1/en not_active Expired - Fee Related
- 1987-11-27 MX MX009522A patent/MX169159B/en unknown
- 1987-12-03 FI FI875336A patent/FI84321C/en not_active IP Right Cessation
- 1987-12-03 PT PT86278A patent/PT86278B/en not_active IP Right Cessation
- 1987-12-03 US US07/128,303 patent/US4790932A/en not_active Expired - Lifetime
- 1987-12-03 CN CN87107280A patent/CN1011296B/en not_active Expired
- 1987-12-04 CA CA000553595A patent/CA1320769C/en not_active Expired - Fee Related
- 1987-12-04 AU AU82109/87A patent/AU601244B2/en not_active Ceased
- 1987-12-04 ZA ZA879141A patent/ZA879141B/en unknown
- 1987-12-04 BR BR8706570A patent/BR8706570A/en unknown
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2200220A (en) * | 1936-06-06 | 1940-05-07 | Ig Farbenindustrie Ag | Nu-substituted aspartic acids and their functional derivatives and process of producig them |
FR2313128A1 (en) * | 1975-06-06 | 1976-12-31 | American Cyanamid Co | PROCESS FOR ENRICHING MINES OTHER THAN SULPHIDES BY FLOTATION |
GB2037619A (en) * | 1978-12-04 | 1980-07-16 | Engelhard Min & Chem | Tin flotation |
Non-Patent Citations (1)
Title |
---|
SOVIET INVENTIONS ILLUSTRATED, Woche E06, 24 März 1982, Derwent Publications Ltd., London, GB; & SU-A-825 163 (UKR NATURAL RESOURCE) 05-05-1981 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5540336A (en) * | 1991-10-04 | 1996-07-30 | Henkel Kommanditgesellschaft Auf Aktien | Method of producing iron ore concentrates by froth flotation |
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Publication number | Publication date |
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FI875336A (en) | 1988-06-06 |
EP0270018B1 (en) | 1992-06-17 |
PT86278A (en) | 1988-01-01 |
EP0270018A3 (en) | 1990-04-18 |
ATE77262T1 (en) | 1992-07-15 |
AU601244B2 (en) | 1990-09-06 |
AU8210987A (en) | 1988-06-09 |
CN87107280A (en) | 1988-06-15 |
MX169159B (en) | 1993-06-23 |
FI84321C (en) | 1991-11-25 |
PT86278B (en) | 1990-11-07 |
FI84321B (en) | 1991-08-15 |
ES2031869T3 (en) | 1993-01-01 |
ZA879141B (en) | 1988-06-06 |
DE3779878D1 (en) | 1992-07-23 |
BR8706570A (en) | 1988-07-12 |
CA1320769C (en) | 1993-07-27 |
CN1011296B (en) | 1991-01-23 |
FI875336A0 (en) | 1987-12-03 |
DE3641579A1 (en) | 1988-06-16 |
US4790932A (en) | 1988-12-13 |
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