Collecting agent with carboxyl-hydroximido structure, preparation of collecting agent and application of collecting agent in flotation

A collector and hydroxime technology, applied in flotation, solid separation, etc., can solve the problems of difficulty in preparing combined agents, temperature sensitivity, poor water solubility, etc., and achieve the effects of improving flotation efficiency, enhancing adsorption, and reducing dosage

Active Publication Date: 2022-03-18
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, because fatty acid collectors have poor water solubility, are difficult to disperse, and are more sensitive to temperature, it is difficult to prepare combined agents. Therefore, a

Method used

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  • Collecting agent with carboxyl-hydroximido structure, preparation of collecting agent and application of collecting agent in flotation
  • Collecting agent with carboxyl-hydroximido structure, preparation of collecting agent and application of collecting agent in flotation
  • Collecting agent with carboxyl-hydroximido structure, preparation of collecting agent and application of collecting agent in flotation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0072] Mix 14.86g of L-glutamic acid (content: 99%) and 20mL of methanol, then add 2g of concentrated sulfuric acid catalyst, heat to 70°C, stir and reflux for 5h to obtain L-glutamic acid-1-methyl ester. Add 17.58g of n-decanoic acid (98% content) and 16.72g N,N'-carbonyldiimidazole (CDI) (97% content) into the ball mill jar, grind for 30min, then add the L-glutamic acid-1 obtained above - Methyl ester continued grinding for 1 h. Then add 6.98g hydroxylamine hydrochloride (content is 98.5%) and 8.33g sodium hydroxide (content is 96%), continue to grind for 30min, add water to dissolve, and adjust pH to about 5 with 3mol / L hydrochloric acid, leave standstill to wait for floc After precipitation, the orange-yellow solid product was obtained after cooling and filtration, which was the target collector product. After analyzing and detecting, the content of collector product 4-decanoylamino-4-hydroxycarbamoyl butyric acid is 49.95%, based on the yield of 4-decanoylamino-4-hydroxy...

Embodiment 2

[0075] Mix 13.31g of L-aspartic acid (100% content) and 20mL of methanol, then add 2g of concentrated sulfuric acid catalyst, heat to 70°C, stir and reflux for 5h to obtain the corresponding L-aspartic acid-1-methyl ester. Add 17.58g of n-decanoic acid (98% content) and 16.72g N,N'-carbonyldiimidazole (CDI) (97% content) into the ball mill jar, grind for 30min, then add the L-aspartic acid obtained above- 1-Methyl ester, continue grinding for 1h. Then add 6.98g hydroxylamine hydrochloride (content is 98.5%) and 8.33g sodium hydroxide (content is 96%), continue to grind for 30min, add water to dissolve, and adjust pH to about 5 with 3mol / L hydrochloric acid, leave standstill to wait for floc After precipitation, the orange-yellow solid product was obtained after cooling and filtration, which was the target collector product.

[0076] The product is characterized after separation and purification by column chromatography, and the infrared spectrum of 3-decanoylamino-3-hydroxyca...

Embodiment 3

[0079] Mix 14.86g L-glutamic acid (99% content) and 20mL methanol, then add 2g concentrated sulfuric acid catalyst, heat to 70°C, stir and reflux for 5h to obtain L-glutamic acid-1-methyl ester. Add 20.44g of lauric acid (98% content) and 22.70g N,N'-dicyclohexylcarbodiimide (DCC) (99% content) into a ball mill, grind for 30min, then add the L-glutamine obtained above Acid-1-methyl ester was further triturated for 1 h. Then add 6.98g hydroxylamine hydrochloride (content is 98.5%) and 8.33g sodium hydroxide (content is 96%), continue to grind for 30min, add water to dissolve, and adjust pH with 3mol / L hydrochloric acid to be about 5, leave standstill to treat floc After precipitation, the orange-yellow solid product was obtained after cooling and filtration, which was the target collector product.

[0080] The mass spectrum of 4-dodecanoylamino-4-hydroxycarbamoylbutanoic acid is as Figure 4 As shown, the peak with a mass-to-charge ratio of 343.2214 in the spectrum is [M-H], ...

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Abstract

The invention belongs to the field of mineral flotation, and particularly discloses a collecting agent with a carboxyl-hydroximido structure, the structural formula of the collecting agent is shown in the specification, and the invention further provides a preparation method and application of the novel collecting agent. Carboxyl, hydroxamido and acylamino are introduced into the structure of the collecting agent at the same time, the water solubility and low-temperature adaptability of the collecting agent are improved, the chelation between the collecting agent and metal ions on the surface of minerals is enhanced, and the collecting performance is improved; the method is particularly suitable for efficient flotation recovery of minerals such as manganese carbonate ore, wolframite, scheelite, zinc oxide ore, rare earth ore, cassiterite, ilmenite, bauxite, phosphorite and fluorite ore.

Description

technical field [0001] The invention specifically relates to a collector with a carboxyl-hydroxime structure and its preparation and application in flotation, belonging to the field of mineral processing. Background technique [0002] Mineral dressing technology includes gravity separation, magnetic separation, foam flotation, etc. Among them, foam flotation is the most important method for purifying metals from metal minerals due to its simple operation, high efficiency and low application cost. It is the key to affect the mineral flotation effect. [0003] As an anion collector, fatty acid has active carboxylic acid groups, can form insoluble salts with most metals, and is cheap, so it is widely used in the flotation of various minerals. However, the selectivity of fatty acid collectors is poor, and as the ore resources tend to be leaner and finer, it is difficult to achieve a good flotation separation effect with a single collector in the flotation of most actual mines. ...

Claims

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Application Information

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IPC IPC(8): B03D1/01B03D101/02
CPCB03D1/01B03D2201/02
Inventor 马鑫费玲云曹占芳王帅钟宏
Owner CENT SOUTH UNIV
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