Hydrocarbon amide-bi-hydroxamic acid compound and application thereof in mineral flotation

A hydrocarbon amide group and bishydroxime technology, which is applied to hydrocarbon amide group-bishydroxamic acid compounds and their application in mineral flotation, can solve the problem of limiting collector flotation performance and application, and normal temperature flotation. Poor performance, low selectivity, etc., to improve hydrophobic foaming ability, improve froth flotation efficiency, and good selectivity

Active Publication Date: 2018-11-30
HUNAN UNIV OF CHINESE MEDICINE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Patent CN103301952A discloses a collector of 6-aliphatic amide hexyl hydroxamic acid, which has a strong collection ability for oxidized ore, and compared with benzyl hydroxamic acid, it can increase the flotation recovery rate of oxides by 3 ~10%, but fatty acid hydroxamic acid collectors have poor water solubility, are not easy to decompose, and the selectivity is not high, and the flotation performance at room temperature is not good, especially in low-grade oxidized ores. Select performance and application
At the same time, such collectors require Pb 2+ , Fe 2+ 、Co 2+ and other metal ions to pre-activate the target minerals, which is extremely harmful to the environment

Method used

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  • Hydrocarbon amide-bi-hydroxamic acid compound and application thereof in mineral flotation
  • Hydrocarbon amide-bi-hydroxamic acid compound and application thereof in mineral flotation
  • Hydrocarbon amide-bi-hydroxamic acid compound and application thereof in mineral flotation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Example 1: Synthetic route of hydrocarbon amido-bihydroxamic acid compounds (taking octanyl amido-glutahydroxamic acid as an example)

[0047] Control the temperature of the reactor at about 60°C, add 14.71 parts of glutamic acid with a purity of 99% and 25.28 parts of methanol into the reactor, add 2.2 parts of concentrated sulfuric acid into the reactor under stirring, react for 4 hours, and steam the remaining methanol . Take 14.4 parts of octanoic acid and 16.2 parts of N,N'-carbonyldiimidazole in 25.28 parts of acetonitrile, react at room temperature for 30 minutes, add them into the reaction kettle, and distill off the methanol after 6 hours of reaction. Then add 6.95 parts of hydroxylamine hydrochloride and 8.00 parts of sodium hydroxide into the above-mentioned reactor, and add 50 parts of water as a solvent, further react for 3 hours, adjust the pH of the reaction solution with 0.1M hydrochloric acid to be 6, and obtain the required Caprylamide-glutarediohydro...

Embodiment 2

[0048] Embodiment 2: Application of hydrocarbon amido-dihydroxamic acid in tungsten ore flotation

[0049] Put scheelite and wolframite pure minerals with grinding fineness -200 mesh accounting for 85% respectively in 40mL flotation tank, add 40mL water, stir for 1min to mix evenly, add 2500g / t of sodium carbonate to adjust pH Value, stirred for 2mins, then added the amount of collector 100g / t, foaming agent 2 # oil 15g / t under the conditions of flotation. The flotation contrast test results of two kinds of hydrocarbon amido-bihydroxamic acid and commonly used benzohydroxamic acid and octylhydroxamic acid in the present invention are shown in Table 1. Its flotation process flow chart is shown in figure 1 . It can be seen from Table 1 that the collection ability of hydrocarbon amido-bihydroxamic acid compounds to scheelite and wolframite is obviously stronger than that of two commonly used hydroxamic acids.

[0050] Table 1 The experimental results of four kinds of hydroxami...

Embodiment 3

[0053] Example 3: Application of 2-decylamino-pentanehydroxamic acid in tungsten ore flotation

[0054] A sulfur beneficiation tailings containing WO in Yunnan 3 0.24%, grinding fineness -200 mesh accounts for 85%, use 3000g / t sodium carbonate to adjust pH value, 1500 g / t water glass as dispersant, collector dosage 400g / t, 2# oil 40g / t Under the condition of , after a roughing operation, tungsten crude concentrate is obtained, and the flotation results of hydrocarbon amido-dihydroxamic acid and octyl hydroxamic acid are shown in Table 2. It shows that, compared with octylhydroxamic acid, 2-decylamino-pentanedihydroxamic acid obtains a higher recovery rate of tungsten, and the recovery rate increases by 9.54%.

[0055] Table 2 Flotation conditions and results of tungsten ore

[0056]

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Abstract

The invention provides a hydrocarbon amide-bi-hydroxamic acid compound and application thereof in mineral flotation. The structural formula of the hydrocarbon amide-bi-hydroxamic acid compound is as shown in the description, wherein R represents an aliphatic hydrocarbon group of C2 to C18, and n ranges from 1 to 10. The hydrocarbon amide-bi-hydroxamic acid compound serving as a collector can enhance the chelation and recognition to metal oxidized ores, promote the ordered arrangement of the collector on a mineral surface and effectively recover tungsten ores, rare earth ores, tin ores or ilmenite by flotation, has the advantages of strong collecting capacity, high selectivity, low consumption of tons of ores, etc., and is especially suitable for processing hard dressing fine grained ores.

Description

technical field [0001] The invention relates to a hydrocarbon amido-bihydroxamic acid compound and its application in mineral flotation. Background technique [0002] The ability of hydroxamic acid to chelate metal ions has been widely studied in the fields of biology, medicine and chemical industry. A metal ion can chelate 2 or 3 hydroxamic acid molecules to form a coordination site of a five-membered ring. Therefore, hydroxamic acid has become a chelating collector that has attracted more and more attention. Hydroxamic acid and its salts are known flotation collectors for froth flotation of oxide minerals, often used in the flotation of metals or minerals, such as fluorspar, wolframite, wolframite, cassiterite, muscovite , phosphatite, hematite, pyrolusite, rhodonite, chrysocolla, malachite, barite, calcite and rare earths. [0003] At present, the commonly used hydroxamic acid collectors are mainly benzyl hydroxamic acid, salicylic hydroxamic acid, octyl hydroxamic acid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03D1/01B03D101/02
CPCB03D1/01B03D2201/02
Inventor 邓兰青黄颖袁志鹰黄志强任倩唐昱黄莉杨岩涛
Owner HUNAN UNIV OF CHINESE MEDICINE
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