Process for the separation of non-sulfidic minerals and ores from unwanted constituents of crude mineral and ore

a technology of non-sulfidic minerals and ores, which is applied in the direction of flotation and solid separation, etc., can solve the problems of increasing the flotation time, affecting the recovery of valuable materials, and requiring the removal of silicate, which is undesirable for many applications

Active Publication Date: 2016-12-13
COGNIS IP MANAGEMENT GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

Polymeric esterquats enhance the recovery yield of valuable minerals while reducing the quantity of collectors needed, maintaining high selectivity and stability, even in the presence of magnesium salts, thereby improving the economic viability and efficiency of the flotation process.

Problems solved by technology

Calcite minerals, however, are often accompanied by silicates so that, to purify the calcite, the silicate—which is undesirable for many applications—has to be removed.
Another problem which has a serious impact on the selectivity of the froth flotation process is related to the magnesium content of the minerals or ores.
Magnesium salts seriously improve the stability of the froth, which collapses slowly and therefore increases the flotation time, while the selectivity drops.
Although said esterquat mixtures show a superior biodegradability when compared with other cationic collectors, the products still do not lead to satisfactory recovery of the valuable material, in particular calcite minerals, when used in economically reasonable quantities.

Method used

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  • Process for the separation of non-sulfidic minerals and ores from unwanted constituents of crude mineral and ore
  • Process for the separation of non-sulfidic minerals and ores from unwanted constituents of crude mineral and ore
  • Process for the separation of non-sulfidic minerals and ores from unwanted constituents of crude mineral and ore

Examples

Experimental program
Comparison scheme
Effect test

examples

Manufacturing Example M1

[0070]567 g (2.1 moles) of partly hydrogenated palm oil fatty acid, 219 g (1.5 moles) of adipic acid and 0.3 g of hypophosphonic acid were introduced into a stirred reactor and heated to 70° C. under a reduced pressure of 20 mbar. 447 g (3 moles) of triethanolamine were then added dropwise in portions and, at the same time, the temperature was increased to 120° C. After the addition, the reaction mixture was heated to 160° C., the pressure was reduced to 3 mbar and the mixture was stirred under those conditions for 2.5 h until the acid value had fallen to below 5 mg KOH / g. The mixture was then cooled to 60° C., the vacuum was broken by introduction of nitrogen, and 0.6 g of hydrogen peroxide was added in the form of a 30% by weight aqueous solution. For the quaternisation step, the resulting ester was dissolved in 376 g of isopropyl alcohol, and 357 g (2.83 moles) of dimethyl sulfate were added to the resulting solution over a period of 1 hour at such a rate ...

application examples

[0071]The following examples demonstrate the superiority of the polymeric esterquats to be used in accordance with the invention over collector components known from the prior art, in particular compared to conventional mono / di-esterquat mixtures. The tests were carried out under laboratory conditions, in some cases with increased collector concentrations considerably higher than necessary in practice. Accordingly, the potential applications and in-use conditions are not limited to separation exercises and test conditions described in the examples. The quantities indicated for reagents are all based on active substance.

examples 1-3

Comparative Examples C1-C3

[0072]The following examples and comparative examples illustrate the effectiveness of the collectors according to the present invention compared to conventional mono / di-esterquat collectors in the flotation of silicate containing calcite minerals. The results are shown in Table 1.

[0073]Particle size distribution: >40 μm: >50% b.w.

[0074]Silicates: about 1.5 to 2.5% b.w.

[0075]Calcite: about 97.5 to 98.5% b.w.

[0076]

TABLE 1Calcite flotationCompositionC1C2C3123Dehyquart ® AU 461 [g * t−1]660560320———Dehyquart ® 042 [g * t−1]———350300250OMC 63173 [g * t−1]10010085———ResultsYield Floated Material [g]39.875.459.740.380.364.8Yield Residue [g]383361438401438525Feed: HCl insoluble [%]2.62.62.22.52.62.1Floated Material:25.713.618.445.749.050.7HCl insoluble [%]Residue: HCl insoluble [%]0.090.180.570.060.10.35Calcite Loss [%]7.215.310.02.92.61.7

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Abstract

A process for the flotation of non-sulfidic minerals or ores, is disclosed in which crushed crude minerals or ores are mixed with water and a collector to form a suspension, air is introduced into the suspension in the presence of a reagent system, and a floated foam containing the non-sulfidic mineral or ores is formed therein along with a flotation residue comprising the gangue polymeric esterquats as the collector polymeric esterquats. The polymeric esterquats are obtained by reacting alkanolamines with a mixture of monocarboxylic acids and dicarboxylic acids and quaternizing the resulting esters, optionally after alkoxylation.

Description

CROSS REFERENCE TO RELATED APPLICATIONS[0001]This application is the National Stage entry of PCT / EP2008 / 000309, filed Jan. 17, 2008, which claims priority to European Patent application number 07001677, filed Jan. 26, 2007, both of which are incorporated herein by reference in their entireties.FIELD OF THE INVENTION[0002]This invention relates to the flotation of non-sulfidic minerals and ores and more particularly the use of certain cationic surfactants as collectors in a froth flotation process.BACKGROUND OF THE INVENTION[0003]Flotation is a separation technique commonly used in the dressing of minerals and crude ores for separating valuable materials from the gangue. Non-sulfidic minerals and ores in the context of the present invention include, for example, calcite, apatite, fluorite, scheelite, baryta, iron oxides and other metal oxides, for example, the oxides of titanium and zirconium, and also certain silicates and aluminosilicates. In dressing processes based on flotation, ...

Claims

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Application Information

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Patent Type & AuthorityPatents(United States)
IPC IPC(8): B03D1/01B03D1/016B03D1/02
CPCB03D1/01B03D1/012B03D1/011B03D2201/02B03D2203/04B03D1/016B03D1/02
InventorBIGORRA LLOSAS, JOAQUINKOPPL, DIETGERHOFFMANN-DOERR, SIMONEHINRICHS, KLAUS
OwnerCOGNIS IP MANAGEMENT GMBH