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Hydroximic acid-alkylamine multi-ligand metal complex collecting agent, and preparation method and application thereof

A technology of metal complexes and alkylamines, which is applied in the field of hydroxamic acid-alkylamine multi-ligand metal complex collectors, efficient flotation separation of rare earth and gangue minerals, and flotation collectors, can solve the problem. Difficulty separating rare earth and gangue minerals, low recovery rate, etc

Active Publication Date: 2020-01-24
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Aiming at the traditional single chelation collector or fatty acid collector used in the flotation of rare earth in the prior art, there are problems such as difficult separation of rare earth and gangue minerals and low recovery rate. The first purpose of the present invention is to provide a A hydroxamic acid-alkylamine compound with strong selective collection ability for monazite, bastnaesite, xenotime and other rare earths, which can efficiently separate these rare earths from silicate and calcium-containing gangue minerals bulk metal complex collector

Method used

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  • Hydroximic acid-alkylamine multi-ligand metal complex collecting agent, and preparation method and application thereof
  • Hydroximic acid-alkylamine multi-ligand metal complex collecting agent, and preparation method and application thereof
  • Hydroximic acid-alkylamine multi-ligand metal complex collecting agent, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Weigh 0.001mol of benzohydroxamic acid and put it into a 500mL flask, add 300mL of methanol as a solvent, add 0.0002mol of ethyl acetate after complete dissolution, then add sodium hydroxide to adjust the pH value to 9.0, and stir and react at room temperature for 30min. Obtain hydroxamate; add hydroxamate and didecylmethylamine into the flask according to the molar mass ratio of 1:1, add glycerin to make the mass concentration 35%, then place it in a constant temperature water bath and stir it with a magnet And heated to 90 °C and reacted for 60 minutes, the obtained liquid was recrystallized three times after rotary evaporation to obtain a solid; the obtained solid was added to the flask, and a mixed liquid of water and methanol was prepared according to the volume ratio of water and methanol at 6:1 and added to the flask , so that the mass percent concentration of the solid in the mixed solution of water and methanol is 40%, to obtain the hydroxamic acid-alkylamine mu...

Embodiment 2

[0056] Weigh 0.002mol of propyl hydroxamic acid and put it into a 500mL flask, add 300mL of methanol as a solvent, add 0.0004mol of ethyl acetate after complete dissolution, then add sodium hydroxide to adjust the pH value to 8.5, stir and react at room temperature for 30min, Obtain hydroxamate; add hydroxamate and dodecylamine into the flask according to the molar mass ratio of 1:2, add glycerol to make its mass concentration 36%, then place it in a constant temperature water bath, stir and heat with a magnet After reaching 85°C, react for 75 minutes, and recrystallize the obtained liquid three times to obtain a solid; add the obtained solid to the flask, prepare a mixed liquid of water and methanol according to the volume ratio of water and methanol at 7:1, and add it to the flask to make the solid The mass percentage concentration in the mixed solution of water and methanol is 45%, and the hydroxamic acid-alkylamine multi-ligand composite micelles are obtained. Put the hydr...

Embodiment 3

[0061] Weigh 0.002mol of salicylic hydroxamic acid into a 500mL flask, add 300mL of methanol as a solvent, add 0.0004mol of ethyl acetate after complete dissolution, then add sodium hydroxide to adjust the pH value to 8.5, stir and react at room temperature for 40min to obtain Hydroxamate; hydroxamate and octadecyl tertiary amine are added in the flask according to the molar mass ratio of 1:2, add glycerol to make its mass concentration 40%, then place it in a constant temperature water bath, stir and heat to After reacting at 100°C for 65 minutes, the obtained liquid was recrystallized three times after rotary evaporation to obtain a solid; the obtained solid was added to a flask, and a mixed liquid of water and methanol was prepared according to the volume ratio of water and methanol at 8:1 and added to the flask to make the solid The mass percentage concentration in the mixed solution of water and methanol is 35%, and the hydroxamic acid-alkylamine multi-ligand composite mic...

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Abstract

The invention discloses a hydroxamic acid-alkylamine multi-ligand metal complex collecting agent, and a preparation method and an application thereof. The hydroxamic acid-alkylamine multi-ligand metalcomplex collecting agent is obtained by a coordination reaction of hydroxamic acid-alkylamine multi-ligand composite micelles, prepared from hydroxamic acid salt and alkylamine, and metal ions. The hydroxamic acid-alkylamine multi-ligand metal complex collecting agent has extremely high selective collecting capacity on rare earth ores, can realize selective flotation separation of rare earth minerals such as monazite, bastnaesite and xenotime and gangue minerals by using a small amount or zero amount of a gangue mineral inhibitor, and fundamentally solves the technical problem of difficult flotation separation of rare earth and gangue minerals.

Description

technical field [0001] The present invention relates to a flotation collector, in particular to a hydroxamic acid-alkylamine multi-ligand metal complex collector for flotation separation of rare earths, and also relates to its preparation method, and the use of hydroxamic acid The invention relates to a method for realizing efficient flotation separation of rare earths and gangue minerals by acid-alkylamine multi-ligand metal complexes, belonging to the technical field of mineral flotation. Background technique [0002] Rare earth is a general term for seventeen metal elements including lanthanides, scandium and yttrium in the chemical periodic table. At present, more than 250 kinds of rare earth minerals have been discovered in the world, among which there are about 50 to 60 kinds of rare earth minerals with the most industrial value, but less than 10 kinds with the most mining value. The most important rare earth minerals are bastnaesite, monazite, xenotime, and ion-adsor...

Claims

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Application Information

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IPC IPC(8): B03D1/01B03D1/02B03D101/02B03D103/04
CPCB03D1/01B03D1/02B03D2201/02B03D2203/04
Inventor 韩海生卫召孙伟胡岳华王若林孙文娟付君浩
Owner CENT SOUTH UNIV
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