A method for spectrophotometric detection of amine collectors

A technology of collectors and amines, applied in the measurement of color/spectral properties, material analysis by observing the impact on chemical indicators, measuring devices, etc., can solve the problems of refractory degradation, water environment pollution, light sensitivity , to achieve the effect of reducing hazards and simplifying experimental operations

Active Publication Date: 2021-05-28
NORTHEASTERN UNIV LIAONING
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  • Abstract
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Problems solved by technology

[0002] Amine collectors are widely used in the flotation process of silicates, carbonates and soluble salt minerals, but amine collectors are organic compounds that are difficult to degrade and highly toxic, and will cause serious damage to the water environment. pollution
However, there are few relevant reports on the concentration determination and discharge standards of amine collectors in water quality at home and abroad, and there are some problems.
The commonly used quantitative analysis method is the determination of TOC (total organic carbon) combined with liquid chromatography or gas chromatography, but TOC detectors and chromatographs are relatively expensive
There are literatures mentioning the use of bromophenol blue or golden orange II complexed amine collectors, and using the spectrophotometric method of chloroform extraction to measure its concentration. This method has high sensitivity, but the artificial complexation and extraction process is loaded down with trivial details, and the extraction is not Complete, and chloroform is sensitive to light, and it will decompose into highly toxic carbonyl chloride and hydrogen chloride when exposed to light, which will cause harm to operators and the environment

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  • A method for spectrophotometric detection of amine collectors
  • A method for spectrophotometric detection of amine collectors
  • A method for spectrophotometric detection of amine collectors

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] 1. Solution preparation:

[0038] The concentration is 5×10 -4 mol / L Congo red solution: weigh 0.3483g Congo red, dissolve in a small amount of water, dilute to 1000mL, and store in a brown bottle;

[0039] Dodecylamine solution: Accurately weigh 0.0200g of dodecylamine, add 3 drops of hydrochloric acid dropwise, dilute with water to 1000mL to obtain a concentration of 20.00mg / L dodecylamine solution, dilute with water to prepare a concentration of 4.00mg / L, 8.00mg / L L, 10.00mg / L, 14.00mg / L dodecylamine solution.

[0040] Acetic acid buffer solution with pH=5: Weigh 11.50g of sodium acetate, add 1.4mL of glacial acetic acid, dilute to 250mL with water, adjust the pH of the solution to 5 with glacial acetic acid, and prepare it for immediate use.

[0041] 2. Preparation of dodecylamine standard curve:

[0042] Add 0.00, 4.00, 8.00, 10.00, 14.00, 20.00mL / g dodecylamine collector solutions, 5ml each, into six 25mL stoppered colorimetric tubes, add 1mL of acetic acid buf...

Embodiment 2

[0051] Standard curve equations for primary amine and quaternary ammonium collectors.

[0052] Preparation of collector solution: Take 0.0200g of cetylamine collector in deionized water at 50°C, add dropwise three drops of concentrated hydrochloric acid to dissolve, place in an ultrasonic oscillator and dilute to 1000mL with deionized water; take 0.0200g respectively Dissolve quaternary ammonium collectors (dodecyltrimethylammonium chloride, dodecyltrimethylammonium bromide) in deionized water, then dilute to 1000mL with water to obtain a concentration of 20.00mg / L for collection The agent solution was diluted to the required concentration respectively to obtain 4.00, 8.00, 10.00, and 14.00mg / L solutions.

[0053] According to the method of embodiment 1, test the standard curve equation of other amine collectors (hexadecylamine, dodecyltrimethylammonium chloride, dodecyltrimethylammonium bromide), enumerate dodecane The standard curve of trimethylammonium chloride (quaternary...

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Abstract

A method for spectrophotometric detection of amine collectors in water quality, relating to the technical field of chemistry, flotation reagents / environmental inspection and determination, the method of the present invention includes a method for making a standard curve of amine collectors and measuring Amine collector concentration. Compared with bromophenol blue spectrophotometry, golden orange II spectrophotometry and liquid (gas) phase chromatography, the inventive method simplifies the detection steps, and the chromogenic agent used in the experiment greatly reduces the impact on operators and the environment in the experimental process. The hazards and the cost of the experiment, and the conditions are optimized, so that the method has good reliability and a wide detection range.

Description

technical field [0001] The invention relates to the technical fields of chemistry, flotation reagents and environmental inspection and measurement, in particular to a method for detecting amine collectors by spectrophotometry. Background technique [0002] Amine collectors are widely used in the flotation process of silicates, carbonates and soluble salt minerals, but amine collectors are organic compounds that are difficult to degrade and highly toxic, and will cause serious damage to the water environment. pollution. However, there are few relevant reports on the concentration determination and discharge standards of amine collectors in water quality at home and abroad, and there are some problems. The commonly used quantitative analysis method is the determination of TOC (total organic carbon) combined with liquid chromatography or gas chromatography, but TOC detectors and chromatographs are relatively expensive. There are literatures mentioning the use of bromophenol b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/78G01N21/33
CPCG01N21/33G01N21/78G01N2021/775
Inventor 刘文刚王鑫阳彭祥玉段浩
Owner NORTHEASTERN UNIV LIAONING
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