CN104961193A - Separation method of zinc cyanide complex ions - Google Patents

Separation method of zinc cyanide complex ions Download PDF

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Publication number
CN104961193A
CN104961193A CN201510423901.6A CN201510423901A CN104961193A CN 104961193 A CN104961193 A CN 104961193A CN 201510423901 A CN201510423901 A CN 201510423901A CN 104961193 A CN104961193 A CN 104961193A
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China
Prior art keywords
resin
solution
cyanide complex
complex ions
separation
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CN201510423901.6A
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CN104961193B (en
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申波
刘影
叶锦娟
降向正
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Changchun Gold Research Institute
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Changchun Gold Research Institute
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Abstract

The invention discloses a separation method of zinc cyanide complex ions. The method is based on the principles that the coordination bond formed by Zn<2+> and the functional group -N<+>(CH2COO)2<-> of an Na<+> type D751 macroporous chelated styrene based ion-exchange resin is stronger than Zn(CN)4<2->, the coordination bonds of other heavy metal ions such as Fe<3+>, Cu<2+> and -N<+>(CH2COO)2<-> are weaker than metal cyanide complex ions such as Fe(CN)6<3-> and Cu(CN)4<2->, and the chelated resin does not adsorb the anions CN<->; according to the method, the cyanide-containing wastewater containing the metal cyanide complex ions are fed into the Na<+> type macroporous chelated resin for dynamic exchange adsorption, Zn<2+> enters the resin from the solution while Na<+> enters the solution from the resin, the exchange saturated resin is regenerated by use of an HCL solution in the mass percentage of 4%, and the regenerated solution is a ZnCl2 solution. The separation method is capable of realizing the separation of Zn(CN)4<2-> from other metal cyanide complex ions such as Fe(CN)6<3-> and Cu(CN)4<2-> in the solution, and the separation of Zn<2+> from CN<-> in Zn(CN)4<2->.

Description

A kind of separation method of zinc cyanogen complex ion
Technical field
The present invention relates to method or the technical field such as device, inorganic chemistry of general physics or chemistry.In particular to a kind of zinc cyanogen complex ion Zn (CN) 4 2-separation method.
Background technology
CN in solution -with Fe 3+, Cu 2+, Zn 2+in heavy metal usually with more stable metal cyanogen complex ion M (CN) 2n n-form exist, how will containing metal cyanogen complex ion M (CN) 2n n-zn in solution 2+independent Separation and Recovery? the performance difference that GOLD FROM PLATING SOLUTION belongs to cyanogen complex ion is less, and employing strong reducing property metal can by the Fe (CN) in solution 6 3-, Cu (CN) 4 2-deng M (CN) 2n n-displacement generates Metal Zn, Cu and Fe, although reaction has sequencing, but do not have selectivity, namely replacement(metathesis)reaction is not for a certain metal, and all the other metals do not react, although the method can by Zn (CN) 4 2-complex pattern change the CN of Metal Zn and free state into -, but can not separating element Zn, Cu and Fe.If employing anionite-exchange resin, utilize resin to M (CN) 2n n-adsorption selectivity order, can by Fe (CN) 6 3-, Cu (CN) 4 2-with Zn (CN) 4 2-approximate separation, but Zn (CN) can not be destroyed 4 2-chelation structure, namely cannot separation of Zn 2+and CN -.
Summary of the invention
The object of this invention is to provide a kind of zinc cyanogen complex ion Zn (CN) 4 2-separation method, the method can by Zn in solution (CN) 4 2-from M (CN) 2n n-independent separation, and by Zn (CN) 4 2-chelation structure destroy, make Zn 2+and CN -be separated.
The method of the present invention is: utilize Zn 2+with Na +function base-the N of type D751 macropore chelating type styrene ion exchange resin +(CH 2cOO) 2 -the coordinate bond formed is better than Zn (CN) 4 2-, all the other heavy metal ion are as Fe 3+, Cu 2+with-N +(CH 2cOO) 2 -coordinate bond be weaker than Fe (CN) 6 3-with Cu (CN) 4 2-deng metal cyanogen complex ion, resin is adsorpting anion CN not -principle, the cyanide wastewater of containing metal cyanogen complex ion is passed into Na+ type macroporous chelate resin and carries out dynamic exchange absorption, Zn 2+resin is entered, Na by solution +enter solution by resin, exchange the HCl regeneration of waste liquor of saturated resin mass percent 4%, regenerated liquid is ZnCl 2solution.
The chemical equation of the process of the present invention is as follows:
Beneficial effect of the present invention:
The method can realize Zn in solution (CN) 4 2-with other metal cyanogen complex ions as Fe (CN) 6 3-, Cu (CN) 4 2-separation, and Zn (CN) 4 2-in Zn 2+and CN -separation.

Claims (1)

1. a separation method for zinc cyanogen complex ion, the method is: utilize Zn 2+with Na +function base-the N of type D751 macropore chelating type styrene ion exchange resin +(CH 2cOO) 2 -the coordinate bond formed is better than Zn (CN) 4 2-, Fe 3+, Cu 2+with-N +(CH 2cOO) 2 -the coordinate bond of heavy metal ion is weaker than Fe (CN) 6 3 -with Cu (CN) 4 2-metal cyanogen complex ion, resin is adsorpting anion CN not -principle, the cyanide wastewater of containing metal cyanogen complex ion is passed into Na+ type macroporous chelate resin and carries out dynamic exchange absorption, Zn 2+resin is entered, Na by solution +enter solution by resin, exchange the HCl regeneration of waste liquor of saturated resin mass percent 4%, regenerated liquid is ZnCl 2solution.
CN201510423901.6A 2015-07-19 2015-07-19 Separation method of zinc cyanide complex ions Active CN104961193B (en)

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CN104961193B CN104961193B (en) 2017-03-22

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112047525A (en) * 2020-08-31 2020-12-08 营创三征(营口)精细化工有限公司 Method and system for breaking cyanogen in resin

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10137751A (en) * 1996-11-07 1998-05-26 Japan Organo Co Ltd Ion exchange method and ion exchange column used for ion exchange method
JP2008126147A (en) * 2006-11-21 2008-06-05 Nomura Micro Sci Co Ltd Ion exchange apparatus and ion exchange method
CN103693711A (en) * 2013-11-12 2014-04-02 郑州大学 Method for treating nickel/copper-containing electroplating wastewater by using weak acid ion exchange fibers
CN104556570A (en) * 2014-12-25 2015-04-29 陈程 Method for utilizing zinc ions in zinc industrial wastewater resources

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10137751A (en) * 1996-11-07 1998-05-26 Japan Organo Co Ltd Ion exchange method and ion exchange column used for ion exchange method
JP2008126147A (en) * 2006-11-21 2008-06-05 Nomura Micro Sci Co Ltd Ion exchange apparatus and ion exchange method
CN103693711A (en) * 2013-11-12 2014-04-02 郑州大学 Method for treating nickel/copper-containing electroplating wastewater by using weak acid ion exchange fibers
CN104556570A (en) * 2014-12-25 2015-04-29 陈程 Method for utilizing zinc ions in zinc industrial wastewater resources

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112047525A (en) * 2020-08-31 2020-12-08 营创三征(营口)精细化工有限公司 Method and system for breaking cyanogen in resin
CN112047525B (en) * 2020-08-31 2021-11-02 营创三征(营口)精细化工有限公司 Method and system for breaking cyanogen in resin

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