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Collecting agent for water-soluble cations, preparation method thereof and application thereof

A technology of water-soluble cations and collectors, which is applied in the preparation of ore dressing reagents, amine cation collectors and their preparation fields, can solve the problems of easy-to-corrosion equipment and hinder the application of cation flotation technology, and achieve easy operation and easy The effect of defoaming and simple synthesis route

Active Publication Date: 2014-05-07
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the commonly used amine cationic collectors at home and abroad need to be neutralized with acid before flotation to improve their solubility in water. In actual industrial production, an obvious disadvantage of acidic environment is that it is easy to corrode equipment, which seriously hinders Application of cationic flotation process

Method used

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  • Collecting agent for water-soluble cations, preparation method thereof and application thereof
  • Collecting agent for water-soluble cations, preparation method thereof and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0024] Add 0.10mol decylamine and 100mL absolute ethanol into a 250mL three-necked flask equipped with a thermometer and a reflux condenser, and fix the three-necked flask in a 25°C water bath equipped with a constant temperature magnetic stirrer; heat, stir, and within 3h Slowly add 0.2mol propylene oxide liquid dropwise, and stir continuously for 10 h after the dropwise addition is completed; after the reaction is completed, transfer the reactants in the three-neck flask to a round-bottomed flask of a rotary evaporator for distillation, and evaporate the unreacted epoxy Propane and ethanol; first adjust the temperature of the water bath to be 35 degrees, evaporate the unreacted propylene oxide, then adjust the temperature of the water bath to be 79 degrees, and evaporate the absolute ethanol; stop heating, cool the system, and the The reactant is poured into a beaker, and a transparent high-viscosity liquid can be obtained, which is the new collector N,N-bis(2-hydroxypropyl)d...

Embodiment 2

[0026] Add 0.10mol laurylamine and 100mL absolute ethanol into a 250mL three-necked flask equipped with a thermometer and a reflux condenser, and fix the three-necked flask in a 25°C water bath equipped with a constant temperature magnetic stirrer; heat, stir, and in 3.5h Slowly add 0.25mol propylene oxide liquid dropwise, and continuously stir for 10 h after the dropwise addition is completed; after the reaction is completed, transfer the reactants in the three-neck flask to a round-bottomed flask of a rotary evaporator for distillation, and evaporate the unreacted epoxy Propane and ethanol; first adjust the temperature of the water bath to be 35 degrees, evaporate the unreacted propylene oxide, then adjust the temperature of the water bath to be 79 degrees, and evaporate the absolute ethanol; stop heating, cool the system, and the The reactant is poured into a beaker, and a transparent high-viscosity liquid can be obtained, which is the new collector N,N-bis(2-hydroxypropyl)d...

Embodiment 3

[0028] Add 0.10mol palmitamine and 100mL absolute ethanol into a 250mL three-necked flask equipped with a thermometer and a reflux condenser, and fix the three-necked flask in a 25°C water bath equipped with a constant temperature magnetic stirrer; heat, stir, and in 2.5h Slowly add 0.3mol propylene oxide liquid in the tank, and stir continuously for 10 h after the addition; after the reaction is completed, transfer the reactants in the three-neck flask to a round-bottomed flask of a rotary evaporator for distillation, and evaporate the unreacted rings. Propylene oxide and ethanol; first adjust the temperature of the water bath to 35 degrees, evaporate the unreacted propylene oxide, then adjust the temperature of the water bath to 79 degrees, and evaporate the absolute ethanol; stop heating, cool the system, and put the The reactant is poured into a beaker, and a transparent high-viscosity liquid can be obtained, which is a new collector N,N-bis(2-hydroxypropyl)hexadecylamine. ...

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Abstract

The invention discloses a collecting agent for water-soluble cations, a preparation method of the collecting agent for the water-soluble cations and application of the collecting agent for the water-soluble cations. The collecting agent for the water-soluble cations is characterized in that the collecting agent for the water-soluble cations is an alkylamine surface-active agent with two hydroxypropyl bases or two chlorinated hydroxypropyl bases in each alkylamine molecule. The preparation method of the collecting agent for the water-soluble cations comprises the steps that continuous stir is carried out, and aliphatic amines in a container are dissolved with absolute ethyl alcohol; propylene epoxides or epoxy chloropropane is slowly added under the conditions that the temperature is 25 DEG C, the backflow state is formed, and the time ranges from 2.5 hours to 3.5 hours, and the reaction is continuously carried out for 10 hours, wherein the quantity ratio between aliphatic amines and the propylene oxides or the epoxy chloropropane is 1 to 2-3; reactant is transferred to a distillation system, and unreacted propylene oxides or unreacted epoxy chloropropane and unreacted absolute ethyl alcohol are removed through distillation under the appropriate distillation conditions; the temperature of a reaction system is lowered to be equal to the room temperature, and the needed collecting agent can be obtained. The collecting agent for the water-soluble cations is high in water solubility, and can be used for reverse flotation desiliconization of iron ore or flotation of silicate minerals, and when the collecting agent for the water-soluble cations is used for flotation of artificial mixed ore, iron ore concentrate with the iron grade larger than 65% can be obtained at the normal temperature, wherein the artificial mixed ore is formed by hematite and quartz in the mode that the mass ratio between the hematite and the quartz is 3 to 2.

Description

technical field [0001] The invention relates to an ore dressing agent, in particular to an amine cationic collector with good water solubility and its preparation method and application, belonging to the technical field of preparation of ore dressing agents. The water-soluble cationic collector provided by the invention has the characteristics of good water solubility, suitable foam volume, no corrosion of equipment, good collection capacity and selectivity, and the like. Background technique [0002] Mining is an important basic industry that is indispensable for the sustainable development of the national economy. With the deepening of the shortage of mineral resources in our country and the occurrence characteristics of poor, fine and miscellaneous useful mineral resources in our country, the difficulty of mineral processing will increase day by day. As a special separation technology, flotation has the advantages of strong adaptability, high separation efficiency, and i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03D1/01B03D101/02
Inventor 刘文刚魏德洲刘文宝徐飞飞王本英沈岩柏
Owner NORTHEASTERN UNIV
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