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Chelate type metal ion flotation reagent, and preparation method and application method thereof

A technology for metal ions and flotation reagents, applied in chemical instruments and methods, flotation water/sewage treatment, other chemical processes, etc., to achieve the effects of being beneficial to metal resource recovery, low consumption of reagents, and beneficial to environmental protection

Active Publication Date: 2016-12-21
ZHENGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But so far there is no report about metal ion flotation agents cross-linked by cyclodextrin and succinic anhydride

Method used

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  • Chelate type metal ion flotation reagent, and preparation method and application method thereof
  • Chelate type metal ion flotation reagent, and preparation method and application method thereof
  • Chelate type metal ion flotation reagent, and preparation method and application method thereof

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Embodiment 1

[0018] A chelating type metal ion flotation agent, its preparation process is as follows: with cyclodextrin, sodium hydride and succinic anhydride as raw materials, the amount ratio of the three substances is 1:5:5; first β-cyclodextrin Dissolved in anhydrous N,N-dimethylformamide, stirred for 10 min to obtain a cyclodextrin dispersed phase with a concentration of 5% (w / v, mass volume fraction), and then added to the cyclodextrin dispersed phase in proportion Sodium hydride, stirred at 30 °C for 12 h to obtain an epoxy intermediate; add succinic anhydride to the epoxy intermediate in proportion, and stir at 50 °C for 12 h; wash the obtained product with acetone and place it in a vacuum oven After drying at 50 °C for 24 h, the obtained solid is the chelating metal ion flotation agent.

[0019] Use micro-bubble flotation column to process bauxite mineral processing wastewater, the chelating type metal ion flotation agent that embodiment 1 makes is added to Al 3+ In the high-con...

Embodiment 2

[0023] A chelating type metal ion flotation agent, its preparation process is as follows: with cyclodextrin, sodium hydride and succinic anhydride as raw materials, the amount ratio of the three substances is 1:5:5; first β-cyclodextrin Dissolve in anhydrous N,N-dimethylformamide and stir for 30 min to obtain a cyclodextrin dispersed phase with a concentration of 10% (w / v, mass volume fraction), and then add hydrogenated Sodium, stirred at 50 °C for 24 h to obtain an epoxy intermediate; add succinic anhydride to the epoxy intermediate in proportion, and stir at 70 °C for 24 h; wash the obtained product with acetone and place it in a vacuum oven for 50 After drying at ℃ for 24 h, the obtained solid is the chelating metal ion flotation agent.

[0024] Use the micro-bubble flotation column to process the copper-lead-zinc ore dressing wastewater, and the chelated metal ion flotation agent of embodiment 2 is added to Cu 2+ , Pb 2+ , Zn 2+ In the low-concentration copper-lead-zin...

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Abstract

The invention provides a chelate type metal ion flotation reagent, and a preparation method and application method thereof, belonging to the technical field of mineral processing. The chelate type metal ion flotation reagent is prepared from cyclodextrin, sodium hydride and succinic anhydride through two steps. The preparation method comprises the following steps: allowing sodium hydride to act on cyclodextrin so as to convert cyclodextrin into an epoxide intermediate; and subjecting the epoxide intermediate and succinic anhydride to crosslinking so as to obtain the chelate type metal ion flotation reagent. The application method for the chelate type metal ion flotation reagent comprises the following steps: adding the chelate type metal ion flotation reagent into waste water with a metal ion concentration of 50 to 500 mg / L; and carrying out stirring, aeration and bubbling and flotation, wherein the usage amount of the chelate type metal ion flotation reagent is 10 to 200 mg / L. The chelate type metal ion flotation reagent is especially applicable to removal of metal pollutants in mineral processing wastewater via a fine bubble column ion floatation method, has the advantages of low consumption of the reagent and wide adaptability and facilitates environmental protection and recovery of metal resources.

Description

technical field [0001] The invention belongs to the field of mineral processing, and in particular relates to a chelating type metal ion flotation agent, its preparation method and its use method. Background technique [0002] Cyclodextrin is a kind of cyclic oligosaccharides, and its structure is a hollow ring-shaped truncated cone with a certain size, which is hydrophilic on the outside and hydrophobic on the inside. Cyclodextrin and its derivatives are widely used in mineral flotation reagents and wastewater treatment. [0003] Domestically, a lot of research has been carried out on the modification of cyclodextrin and its application in wastewater treatment, mainly through modification of cyclodextrin or compounding with other agents to enhance its adsorption of pollutants in water, thereby achieving water quality. purify. For example, Zhao Jingchan et al. in "Application of Acrylic Cyclodextrin Polymer in Printing and Dyeing Industrial Wastewater Treatment" (CN1018640...

Claims

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Application Information

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IPC IPC(8): B01J20/26B01J20/30C02F9/04
CPCB01J20/267C02F1/24C02F1/285C02F1/66C02F9/00
Inventor 韩桂洪刘炯天黄艳芳武宏阳柴文翠苏胜鹏曹宁杨桐桐杨淑珍张多党殿原王文娟严朕陈慧兰邢龙杰刘路路
Owner ZHENGZHOU UNIV
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