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Mineral floating collecting agent and its prepn process

A technology of collectors and cationic collectors, applied in flotation, solid separation, etc., can solve problems such as inability to obtain qualified concentrates, and achieve the effects of good selectivity, good biodegradability, and less foam

Inactive Publication Date: 2007-12-19
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But there are also obvious disadvantages: when using anion collectors, it is necessary to use iron ore inhibitors, pH regulators, and quartz activators together.
For example, for hematite, when the particle size is relatively coarse, there is still a certain effect of magnetic separation; but when the particle size is as fine as -40μm, magnetic separation alone cannot obtain qualified concentrate, and flotation is necessary to remove the entrained iron. Fine-grained gangue minerals in the ore, especially quartz and silicate, can improve the grade of concentrate

Method used

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  • Mineral floating collecting agent and its prepn process
  • Mineral floating collecting agent and its prepn process

Examples

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preparation example Construction

[0022] The method for preparing the collector for the above-mentioned mineral flotation provided by the present invention is as follows: first react fatty alcohol with sodium hydroxide or potassium hydroxide under anhydrous conditions to prepare sodium alkoxide or potassium alkoxide; Potassium alkoxide is used as a catalyst to polymerize acrylonitrile and aliphatic alcohol to form ether nitrile, and the ether nitrile is hydrogenated under the action of an amorphous metal catalyst, cooled and discharged, and then the intermediate is used as a raw material to react with acrylonitrile , and then under the action of an amorphous catalyst, hydrogenation changes the nitrile group into an amine group, and undergoes multiple polymerization hydrogenation, thereby obtaining the collector for the mineral flotation.

[0023] According to different purposes, the present invention controls the number of times of polymerization and hydrogenation; first polymerization and hydrogenation obtains...

Embodiment 1

[0033] Embodiment 1: be used for the collector of hematite reverse flotation

[0034] The process of drug synthesis is: first use 10% of the amount of C 12 ~C 14 Fatty alcohol reacts with 3-5% NaOH, the reaction temperature is 80±5°C, and the reaction time is 0.5-1.0 hours, thereby preparing sodium alkoxide. Use this material as a catalyst, in the reactor, first add C 12 ~C 14 Fatty alcohol, add the same mole of acrylonitrile dropwise, control the reaction temperature at 40-50°C, and the reaction time for 2.5-3.0 hours, take samples to analyze the completion of the polymerization reaction, when the polymerization reaction rate reaches 95%, it means the reaction is complete, and the polymer is obtained by filtration. Feed the polymer into the autoclave, add an amorphous metal alloy catalyst, control the reaction conditions for hydrogenation, pressure 2.0-3.0MPa, temperature 140-180°C, hydrogenation reaction for 2 hours, sample and analyze the content of the finished product,...

Embodiment 2

[0036] Example 2: Collector for reverse flotation and desilication of phosphate rock

[0037] The synthesis steps of the medicament are: first use 10% C 10 ~C 14 Fatty alcohol reacts with 3-5% NaOH, the reaction temperature is 80±5°C, and the reaction time is 0.5-1.0 hours to prepare sodium alkoxide. Using sodium alkoxide as a catalyst, in the reactor, first add C 10 ~C 14 Fatty alcohol, add the same mole number of acrylonitrile dropwise, control the reaction temperature at 40-50°C, and the reaction time for 2.5-3.0 hours, take samples to analyze the completion of the polymerization reaction, stop the reaction when the polymerization reaction rate reaches 95%, and filter the product. The clear liquid is fed into the autoclave, an amorphous metal nickel alloy catalyst is added, and the reaction conditions are controlled for hydrogenation. The conditions are: pressure 2.0-3.0MPa, temperature 140-180°C, hydrogenation reaction for 2 hours, sampling and analysis of finished pro...

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PUM

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Abstract

The present invention is collecting agent for mineral floating and its preparation process. The cationic collecting agent contains C8-C18 alkyl radicals, 1-4 amido radicals and ether radicals. Its preparation process includes the following steps: the heating reaction between fatty alcohol and sodium or potassium hydroxide in anhydrous condition to prepare sodium or potassium alcoholate, catalyzing the polymerization of acrylonitrile and fatty alcohol with the sodium or potassium alcoholate to produce ether nitrile, hydrogenating ether nitrile in the action of amorphous metal catalyst and cooling to obtain an intermediate, and repeated polymerizing the intermediate and acrylonitrile and hydrogenating to replace nitrile group with amido group. The collecting agent has powerful collecting capacity, high collecting selectivity, low temperature tolerance, high biodegradability and other advantages.

Description

technical field [0001] The invention relates to the field of mineral processing, in particular to a collector for mineral flotation and a preparation method thereof. Background technique [0002] In the mineral processing industry, flotation is the most effective method and technology for separating useful minerals and gangue minerals. And in the flotation, what played a key role is the flotation collector; especially the purpose mineral that the present invention is aimed at is oxide ore, as hematite, magnetite, limonite, collophosite, silicate, quartz , zinc oxide, etc. Such minerals are naturally hydrophilic and strong minerals, and it is impossible to achieve flotation without adding collectors or collectors with weak collecting power. It must be added that can adsorb on these target minerals to form a surface hydrophobic film, so that the target minerals float with the foam, so as to realize the separation of target minerals and non-target minerals. [0003] As far a...

Claims

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Application Information

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IPC IPC(8): B03D1/01C08F220/44C08F8/04B03D101/02B03D103/02
Inventor 葛英勇
Owner WUHAN UNIV OF TECH
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