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Application of acyl amino polycarboxylic acid/hydroximic acid like compound in mineral flotation

A polycarboxylic acid and amido technology, applied in flotation, solid separation, etc., can solve the problems of insufficient hydrophobicity of amino acids and unindustrial use.

Active Publication Date: 2019-03-22
HUNAN UNIV OF CHINESE MEDICINE +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In summary, amino acids show strong selectivity as collectors, but the hydrophobicity of amino acids is not enough, and the collection capacity of single use of amino acids as collectors needs to be improved. Collectors developed with amino acids have not yet been used industrially.

Method used

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  • Application of acyl amino polycarboxylic acid/hydroximic acid like compound in mineral flotation
  • Application of acyl amino polycarboxylic acid/hydroximic acid like compound in mineral flotation
  • Application of acyl amino polycarboxylic acid/hydroximic acid like compound in mineral flotation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Example 1: Synthetic route of amido polycarboxylic acid / hydroxamic acid compounds (using 2-[4-(1,3-dicarboxy-propylcarbamoyl) 2-hexadecanoylamino-butyrylamino ]-Glutaric acid as an example), control the reactor temperature to 30°C, add 25.64 parts of palmitic acid with a purity of 99% and 250 parts of dichloromethane to 38.40 parts of 2-(7-oxybenzotriazole)- N,N,N',N'-tetramethylurea hexafluorophosphate was added to the reactor, reacted for 30 minutes, then 14.71 parts of glutamic acid with a purity of 99% and 20.2 parts of triethylamine were added, and after reaction for 10 hours, added; 76.80 parts of 2-(7-oxybenzotriazole)-N,N,N',N'-tetramethylurea hexafluorophosphate, react for 30min, then add 29.42 parts of glutamic acid with a purity of 99% and 40.4 parts of triethylamine, after reacting for 1h-16h, stop the reaction and distill off dichloromethane. Wash with water, adjust the pH of the reaction solution to 5 with 0.1M hydrochloric acid to obtain the desired 2-[4-...

Embodiment 2

[0051] Example 2: Application of amido polycarboxylic acid / hydroxamic acid compound in tungsten ore flotation

[0052] Put the pure minerals of scheelite and wolframite with a grinding fineness of -200 mesh accounting for 85% in a 40mL flotation tank, add 40mL water, stir for 1min to make the mixture uniform, add 2500g / t sodium carbonate to adjust the pH Value, stir for 2mins, and then add 100g / t of collector and 15g / t of foaming agent 2# for flotation. The flotation test results of the two amino acid collectors in the present invention and the commonly used benzhydroxamic acid and oleic acid are shown in Table 1. See the flotation process flow chart figure 1 . It can be seen from Table 1 that the collection capacity of amino acid compounds for scheelite and wolframite is significantly stronger than the commonly used oleic acid and benzhydroxamic acid.

[0053] Table 1 Experimental results of pure mineral flotation with four collectors

[0054]

Embodiment 3

[0055] Example 3: Application of 2-[4-(1,3-Dicarboxy-propylcarbamoyl)2-hexadecanoylamino-butyrylamino]-glutaric acid in the flotation of tungsten ore

[0056] A sulfur tailings containing WO in Yunnan 3 0.24%, grinding fineness -200 mesh accounted for 85%, using 3000g / t sodium carbonate to adjust the pH value, 1500 g / t water glass as dispersant, collector dosage 400g / t, 2# oil 40g / t Under the conditions, after a roughing operation, a crude tungsten concentrate is obtained, which is 2-[4-(1,3-dicarboxy-propylcarbamoyl)2-hexadecanoylamino-butyrylamino]-pentane The flotation results of diacid and benzhydroxamic acid are shown in Table 2. It shows that, compared with benzhydroxamic acid, 2-[4-(1,3-dicarboxy-propylcarbamoyl)2-hexadecanoylamino-butyrylamino]-glutaric acid obtained more High tungsten recovery rate, and the recovery rate is increased by 10.52%.

[0057] Table 2 Flotation conditions and results of tungsten ore

[0058]

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Abstract

The invention provides application of acyl amino polycarboxylic acid / hydroximic acid like compound in mineral flotation. A structural formula of the acyl amino polycarboxylic acid / hydroximic acid likecompound is shown as a formula (I); (shown in the description) wherein R in the formula (I) represents aliphatic hydrocarbyl of C<6>-C<18>, n=1-3, and M1, M2, M3 and M4 are separately selected from one or several of -OH, -ON, -OK, -NHOH, -NHON or -NHOK. And n<1>=1-3, n<2>=1-3, and n<3>=1-3. The acyl amino polycarboxylic acid / hydroximic acid like compound is used as a collecting agent to enhance the chelation and recognition action on metal oxidized ores, facilitate ordered arrangement of the collecting agent on the mineral surface, effective flotation recovery is carried out on tungstenores, rare earth ores, tin ores, lithium ores, phosphorus ores, manganese oxide ores, cooper oxide ores, fluorites or titanium iron ores, the acyl amino polycarboxylic acid / hydroximic acid collectingagent has the advantages of high collecting capacity, high selectivity, low ton ore use amounts and the like, and is especially suitable for processing difficultly selected fine grain ores.

Description

Technical field [0001] The invention relates to amido polycarboxylic acid / hydroxamic acid compounds and their application in mineral flotation. Background technique [0002] Amido polycarboxylic acid / hydroxamic acid surfactants, the molecular structure is a dendritic structure, the molecule contains 2 amido groups, 4 carboxyl groups or hydroxime groups, which are multi-solid-philic groups, and also contain hydrocarbon hydrophobic groups. It has high surface activity and aggregation properties, and can form aggregates of various structures. Such compounds are widely used in drug carriers, petroleum viscosity reduction and sewage treatment, and have become one of the current research hotspots. [0003] The collectors of flotation oxide ore are mainly fatty acid, arsine acid, phosphonic acid, Gemini silicon, alkyl sulfonic acid, hydroxamic acid, etc. Fat collectors have strong collecting ability, but poor selectivity. Arsine acid and phosphonic acid collectors have certain toxicity...

Claims

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Application Information

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IPC IPC(8): B03D1/01B03D101/02B03D103/02
CPCB03D1/01B03D2201/02B03D2203/02
Inventor 邓兰青马鑫罗大光左瑞杨岩涛唐昱黄莉杨崧
Owner HUNAN UNIV OF CHINESE MEDICINE
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