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Solid complexation extractant capable of simultaneously adsorbing cation and anion, and preparation and application thereof

An extractant and anion technology, applied in the field of solid coordination extractant preparation, to achieve stable adsorption performance, easy promotion and use, and wide application

Inactive Publication Date: 2012-11-14
WUHAN TEXTILE UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The preparation method of the solid coordination extractant is also provided, so as to overcome the defect that the existing ion exchange resin only adsorbs cations or anions alone

Method used

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  • Solid complexation extractant capable of simultaneously adsorbing cation and anion, and preparation and application thereof
  • Solid complexation extractant capable of simultaneously adsorbing cation and anion, and preparation and application thereof
  • Solid complexation extractant capable of simultaneously adsorbing cation and anion, and preparation and application thereof

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Embodiment 1

[0047] A solid coordination extractant that combines heavy metal salt cations and anions while being loaded on silica gel. figure 1 Structure types shown for Si-L1, Si-L2, Si-L3, Si-L4 or Si-L5. figure 1 Middle: R 1 for H, CH 3 , Br or NO 2 ;HNR 2 It is a compound containing a tertiary amine group, which includes piperidine, morpholine, pyrrolidine, 1-piperazine formamide, 4-piperidine formamide or 1-acetylpiperazine; R 3 for -CH 2 CH 2 -, -CH 2 CH 2 CH 2 -, or phenyl; R 4 For the alkyl.

[0048] Described solid coordination extraction agent, its silica gel surface passes through siloxane coupling agent (II) and has figure 2 Zwitterionic diposition ligands of the shown HL1, HL2, HL3, HL4 or HL5 structure types are covalently bonded, and R in the coupling agent (II) 5 is an alkoxy group, and X is a halogen substituent; in the HL1, HL2, HL3, HL4 or HL5: R 1 for H, CH 3 , Br or NO 2 ;HNR 2 It is a compound containing a tertiary amine group, which includes piper...

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Abstract

The invention relates to a preparation method of extracting resin capable of simultaneously combining cation and anion of heavy metallic salt, in particular to a preparation method for recoverable solid complexation extractant comprising silica gel loaded Salen type Schiff base or reduced derivatives thereof, and synergistic coordination adsorption on cation and anion of divalent metallic salt of the extractant. The extractant prepared by using the preparation method has amphions characteristics, and can extract and combine the cation and anion of heavy metallic salt, and regeneration and recycling of the extractant can be realized by regulating the pH. The method disclosed by the invention overcomes the defects that the existing ion exchange resin only can extract cation or anion; due to synergistic effect of complexation extraction of the cation and anion, the ion adsorption capacity of the extractant can be effectively improved; and acid-base stability and application range of the extractant can be increased by reduction of the Schiff base ligand. The extractant and the preparation method can be applied in the fields of waste water treatment and heavy metallic salt pollutant resource utilization.

Description

technical field [0001] The invention belongs to a preparation method of a solid coordination extractant capable of simultaneously adsorbing heavy metal salt cations and anions, in particular to a zwitterionic diposition ligand solid extractant capable of simultaneously combining heavy metal salt cations and anions based on silica gel loading and its Preparation methods and applications. Background technique [0002] (1) At present, the solvent extraction method commonly used in the hydrometallurgical industry mainly uses organic ligands (HL) and inorganic acids (such as H 2 SO 4 、HNO 3 , HCl, etc.) leaching metal ions (M n+ ) to react to generate a metal complex (MLn(org)) that is electrically neutral, easily soluble in organic solvents and poorly soluble in water, and then extract the complex into the organic phase with an appropriate organic solvent, and then react with an inorganic acid Extraction and electrowinning processes yield pure metals. [0003] nHL(org)+M n...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/22B01J20/30C02F1/28
Inventor 王强曾庆福高魏刘洋袁继文
Owner WUHAN TEXTILE UNIV
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