Triester-based quaternary ammonium salt positive ion collecting agent and preparation method and application thereof

A cationic collector and ester-based quaternary ammonium salt technology, applied in solid separation, flotation, etc., can solve the problems of water pollution, poor fluidity, difficult defoaming, etc., to save heating costs, simple chemical system, and economical The effect of production costs

Inactive Publication Date: 2015-05-27
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, the foam of conventional amine collectors is sticky, has poor fluidity, and is not easy to defoam. It is easy to cause the phenomenon of trough running in industrial production. During the flotation process, it is necessary to continuously add water to improve the fluidity of the concentrate foam.
At the same time, the ammonia nitrogen of amine collectors will pollute the water quality to a certain extent. Therefore, it is of great significance to actively carry out research on high-efficiency and low-toxicity amine cationic collectors.

Method used

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  • Triester-based quaternary ammonium salt positive ion collecting agent and preparation method and application thereof
  • Triester-based quaternary ammonium salt positive ion collecting agent and preparation method and application thereof
  • Triester-based quaternary ammonium salt positive ion collecting agent and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0044] A kind of triester group quaternary ammonium salt cationic collector, its preparation method comprises the following steps:

[0045] 1) Weigh 0.5mol epichlorohydrin into a three-necked flask equipped with a reflux condenser and a dropping funnel, add 70g of acetone as a reaction solvent, place the three-necked flask in an oil bath and heat it to 60°C, and use the dropping funnel to Slowly add 0.2 mol of dodecyl tertiary amine dropwise, magnetically stir for 12 h, and then spin distill off the solvent acetone to obtain the intermediate product as light yellow liquid.

[0046] 2) Take 0.2 mol of the obtained intermediate product and add it to a three-necked flask, add 0.06 mol (11.52 g) of citric acid, add 70 g of isopropanol as a reaction solvent, and add 2% (0.23 g) of citric acid mass to p-toluenesulfonic acid as a catalyst , heated to 100 ° C and refluxed for 9 h. Then the product is rotated to distill off the solvent to obtain the triester-based quaternary ammonium ...

Embodiment 2

[0049] A kind of triester group quaternary ammonium salt cationic collector, its preparation method comprises the following steps:

[0050] 1) Weigh 0.5mol epibromohydrin into a three-necked flask equipped with a reflux condenser and a dropping funnel, add 70g of acetone as a reaction solvent, place the three-necked flask in an oil bath and heat it to 80°C, and use the dropping funnel to Slowly add 0.25 mol of dodecyl tertiary amine dropwise, stir magnetically for 11 h, and then spin distill off the solvent acetone to obtain an intermediate product in the form of a pale yellow liquid.

[0051] 2) Get 0.25mol of the intermediate product obtained and add in a three-necked flask, add 0.08mol (15.36g) of citric acid, add 76.8g of acetone as a reaction solvent, add p-toluenesulfonic acid of 2.5% (0.384g) of citric acid quality as a catalyst, Heated to 120°C and stirred at reflux for 6h. Then the product is rotatably distilled off the solvent to obtain the triester-based quaternary...

Embodiment 3

[0053] A kind of triester group quaternary ammonium salt cationic collector, its preparation method comprises the following steps:

[0054] Weigh 0.21mol of epichlorohydrin and 0.06mol of citric acid into a three-necked flask equipped with a dropping funnel and a reflux condenser, add 57.5g of isopropanol as a solvent and magnetically stir for 20min, then slowly add twelve Tertiary amine 0.2mol (42.6g), heated to 100 DEG C, condensed and refluxed for 12 hours, and then the solvent isopropanol was distilled off by rotary distillation to obtain a light yellow jelly, which is the triester-based quaternary ammonium salt cationic collector, The cationic degree measured by sodium tetraphenylborate back titration method was 82%.

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Abstract

The invention discloses a triester-based quaternary ammonium salt positive ion collecting agent. The general formula I of the collecting agent is as follows, FORMULA, wherein n is any integer from 1 to 3, R is selected from straight chain or branched chain alkyl groups of C12-C21, and X is selected from a helium atom or a bromine atom. A molecule of the triester-based quaternary ammonium salt positive ion collecting agent contains a hydrophilic group hydroxyl which is easy to dissolve; when being applied to mineral flotation, the collecting agent is high in collecting performance and selectivity; formed foams are fine, fragile and easy to eliminate; when the collecting agent is used, no acid is needed to be added for dissolving, so that equipment cannot be corroded; meanwhile, the collecting agent is good in flotation effect under a low-temperature condition; the preparation technology is simple and easy to operate; the triester-based quaternary ammonium salt positive ion collecting agent is environment-friendly.

Description

technical field [0001] The invention relates to mineral dressing agents, in particular to a triester-based quaternary ammonium salt cationic collector and its preparation method and application. Background technique [0002] In my country, the main component of magnetite and hematite gangue is quartz. If the content of quartz is too high, the utilization coefficient of blast furnace will be reduced, the iron output will decrease, and the cost of ironmaking will increase. Therefore, in order to provide high-quality iron ore concentrates for the iron and steel industry, it is particularly important to increase iron and reduce silicon for iron ores with high quartz content. At present, there are three main processes for iron ore flotation: 1) forward flotation, suppressing silicate minerals, and using anion collectors to float iron minerals; 2) reverse flotation, suppressing iron and floating silicon, using cations to trap Collector reverse flotation gangue, leaving iron miner...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03D1/004B03D101/02
Inventor 梅光军朱晓园
Owner WUHAN UNIV OF TECH
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