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Environmentally-friendly amine cationic collector and using method thereof

A cationic collector, environment-friendly technology, applied in chemical instruments and methods, solid separation, preparation of aminohydroxy compounds, etc., to achieve the effect of strong practicability, strong collection ability and good selectivity

Inactive Publication Date: 2010-09-01
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to synthesize a new type of amine cationic collector that is easy to biodegrade, environmentally friendly, has a simple medicament system, is not easy to corrode equipment, and has good collection capacity and selectivity.

Method used

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  • Environmentally-friendly amine cationic collector and using method thereof
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  • Environmentally-friendly amine cationic collector and using method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Take a certain amount of stearic acid and join in the three-necked flask of 250mL, under N 2 Under protection, rise to 80°C, after it is completely melted, add 0.5% hypophosphorous acid in proportion as a catalyst, then add triethanolamine, the molar ratio is stearic acid: triethanolamine=1:0.2, heat up to 170°C, and react for 6h , to obtain a light yellow transparent liquid. The temperature of the above reaction mixture was lowered to 60°C, and the introduction of N 2 , add a certain amount of organic solvent isopropanol, and slowly add ethyl chloride dropwise to carry out quaternization reaction according to the molar ratio of esterification product and ethyl chloride at a ratio of 1.0:0.99. No heating is required during the dropping process, because the The reaction is exothermic. After the dropwise addition was completed, it was heated to 80°C and reacted for 8 hours under reflux. Promptly obtain the amine cationic collector ZJ, which is used for reverse flotatio...

Embodiment 2

[0028] Take a certain amount of stearic acid and join in the three-necked flask of 250mL, under N 2 Under protection, rise to 80°C, after it is completely melted, add 0.5% hypophosphorous acid in proportion as a catalyst, then add triethanolamine, the molar ratio is stearic acid: triethanolamine=1:0.2, heat up to 170°C, and react for 6h , to obtain a light yellow transparent liquid. The temperature of the above reaction mixture was lowered to 60°C, and the introduction of N 2 , add a certain amount of organic solvent isopropanol, and slowly add ethyl chloride dropwise to carry out quaternization reaction according to the molar ratio of esterification product and ethyl chloride at a ratio of 1.0:0.99. No heating is required during the dropping process, because the The reaction is exothermic. After the dropwise addition was completed, it was heated to 80°C and reacted for 8 hours under reflux. Promptly obtain the amine cationic collector ZJ, which is used for reverse flotatio...

Embodiment 3

[0031] ZJ is a quaternary ammonium salt cationic surfactant containing an ester group, and its physical and chemical properties are as follows:

[0032] Appearance: white to light yellow powder;

[0033] Odor: No special irritating odor;

[0034] Solid content: ≥98%;

[0035] Free amine: ≥1%;

[0036] pH (5% isopropanol): 7±2;

[0037] Dissolve in water: Stir and dissolve evenly at 70-80°C.

[0038] The preparation method of ZJ is as follows: this process is carried out in two steps, the first step is esterification, adding fatty acid, triethanolamine, and catalyst into the reactor, slowly raising the temperature to 160-180°C, and reacting for 6h-8h. When there is no residual amine value in the product, it is the end of the reaction, and a light yellow transparent liquid is obtained, and the water generated by the reaction is taken out by nitrogen gas. The product after esterification is a mixture of mono-, di-, and tri-esters, with diesters as the main products. The secon...

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Abstract

The invention discloses an environmentally-friendly amine cationic collector and a using method thereof. The collector ZJ is ester group-containing quaternary ammonium salt cationic surfactant and has a plurality of alkyl groups, wherein an R alkyl group has 6 to 18 carbon atoms; an R1 alkyl group has 1 to 4 carbon atoms; the number of ester groups is 1 or two; and the number of the quaternary ammonium group is 1. The collector is obtained by esterification and quaternarization. As a hydrophobic chain has a carbonyl structure, the collector can hydrolyze easily into nonsurfactant fragments, and is a surfactant with high biodegradability, small toxicity and high performance. The collector is used in ore flotation for the first time and demonstrates high collecting capacity and selectivity.The collector forms fine and fragile foam that is low temperature resistant. The collector can be used under the condition that the pH value of ore pulp is 7 without corroding equipment. The preparation process of the collector is simple and easy in operation. And the collector is easy to biodegrade and is environmentally-friendly.

Description

technical field [0001] The invention relates to mineral dressing agent, in particular to an easily biodegradable amine cationic collector, and describes its application method in mineral dressing flotation. Background technique [0002] As far as iron ore flotation is concerned, anionic collectors are commonly used at home and abroad. They can be used as positive flotation collectors or reverse flotation collectors in iron ore flotation. The disadvantages are: in addition to the collector, the anion reverse flotation process also needs inhibitors, activators and pH value regulators. There are many types of chemicals, large consumption and high cost. Compared with cationic reverse flotation, the reagent system is simple, and the purpose of desilication can be achieved only by using cationic collectors. It also has good low temperature resistance and can realize industrial production at about 10°C. The use of cationic reverse flotation process can save a lot of heating costs ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03D1/01C07C219/06C07C213/06B03D101/02B03D103/04
Inventor 梅光军翁孝卿李莹雪刘晓晔
Owner WUHAN UNIV OF TECH
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