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Preparation method and application of amido carboxylic acid compound

A technology of amido carboxylic acids and compounds, which is applied in the preparation of organic compounds, carboxylic acid amide preparation, chemical instruments and methods, etc., can solve the problems of poor selectivity, weak collection capacity, and limited development, and achieve short reaction time, The effect of high molecular concentration and reduced energy cost

Active Publication Date: 2019-05-17
CENT SOUTH UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the existing fatty acid collectors are cheap and have a wide range of applications, their lack of selectivity and weak collection also limit their development in industry.

Method used

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  • Preparation method and application of amido carboxylic acid compound
  • Preparation method and application of amido carboxylic acid compound
  • Preparation method and application of amido carboxylic acid compound

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] 20.44g lauric acid (content is 98%) and 20.84gN, N'-dicyclohexylcarbodiimide (DCC) (content is 99%) add ball mill jar, grind 30min, then add 14.86g glutamic acid (content 99%) and 8.42g sodium bicarbonate, after continuing to grind for 45min, a white solid product was obtained, which was the target collector product. After analysis and detection, the content of 2-lauroyl amido glutaric acid in the collector product is 52.12%, and the yield of 2-lauroyl amido glutaric acid based on lauric acid is 96.28%.

[0063] The product was characterized after being separated and purified by column chromatography, and the infrared spectrum of 2-lauroylamino glutaric acid was as follows: figure 1 As shown, its main characteristic peaks are (cm -1 ): 3420 belongs to N-H stretching vibration peak; 2950 belongs to CH 3 Stretching vibration peak; 2920, 2850 belong to CH 2 Stretch vibration peak; 1700 belongs to C=O stretch vibration peak.

[0064] The mass spectrum of 2-laurylaminogl...

Embodiment 2

[0066] 20.44g lauric acid (content is 98%) and 5.26g acetic anhydride (content is 97%) are added ball mill jar, grind 30min, then add 14.86g glutamic acid (content is 99%) and 8.42g sodium bicarbonate, continue After grinding for 30 minutes, a white solid product was obtained, which was the target collector product. After analysis and detection, the content of 2-lauroyl amido glutaric acid in the collector product is 65.82%, and the yield of 2-lauroyl amido glutaric acid based on lauric acid is 94.89%.

Embodiment 3

[0068] Add 20.44g lauric acid (98% content) and 10.42g N,N'-dicyclohexylcarbodiimide (DCC) (99% content) and 5.78g anhydrous calcium chloride (96% content) to the ball mill tank, grind for 30min, then add 14.86g of glutamic acid (99%) and 8.42g of sodium bicarbonate, and continue grinding for 30min to obtain a white solid product, which is the target collector product. After analysis and detection, the content of 2-lauroyl amido glutaric acid in the collector product is 54.95%, and the yield of 2-lauroyl amido glutaric acid based on lauric acid is 92.71%.

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Abstract

The invention discloses a preparation method and application of an amido carboxylic acid compound. The preparation method comprises the step of subjecting organic carboxylic acid with a structure represented by a formula (I) shown in the description and an amino acid compound with a structure represented by a formula (II) shown in the description to a grinding reaction in the presence of a coupling reagent, thereby preparing the amido carboxylic acid compound with a structure represented by a formula (III) shown in the description. The product prepared by the method is high in yield, is energy-saving and environmentally friendly and does not need aftertreatment. According to the application, the amido carboxylic acid compound is applied to mineral flotation separation as a collector, and the collector has relatively high collection capability and relatively good selectivity and is particularly applicable to the flotation separation of minerals such as wolframite, scheelite, rare earthminerals, cassiterite, ilmenite, bauxite, manganese oxide ores, phosphorite and fluorite.

Description

technical field [0001] The invention relates to the technical field of mineral flotation, in particular to a preparation method and application of an amido carboxylic acid compound, in particular to the application of an amido carboxylic acid compound as a collector for mineral flotation. Background technique [0002] Fatty acid molecules have active carboxyl functional groups, which are a kind of anion collector with excellent flotation performance, and are widely used in all oxidized ores such as hematite, carbonate ore, ilmenite, sulfate ore, phosphate Flotation separation of ore, and polar salt minerals containing alkaline earth metal cations such as calcite, fluorite, etc. Although the existing fatty acid collectors are cheap and have a wide range of applications, their lack of selectivity and weak collection capacity also limit their development in industry. As the properties of the selected ore become more and more complex, the number of polymetallic associated ore a...

Claims

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Application Information

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IPC IPC(8): C07C231/02C07C233/47B03D1/01
Inventor 钟宏邓兰青罗大光马鑫王帅
Owner CENT SOUTH UNIV
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