Pyridylamine chelate resin for removing heavy metal cations in strong acid wastewater and preparation method of pyridylamine chelate resin

A chelating resin, pyridine amine technology, applied in chemical instruments and methods, water pollutants, other chemical processes, etc., can solve problems such as the simultaneous removal of various heavy metal ions with reduced adsorption capacity, and achieve low cost and simple preparation process. Effect

Active Publication Date: 2020-04-28
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] Aiming at the problems that the existing ion exchange resins or chelating resins have significantly reduced adsorption capacity in strong acid and high salt environments or are not suitable for simultaneous re

Method used

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  • Pyridylamine chelate resin for removing heavy metal cations in strong acid wastewater and preparation method of pyridylamine chelate resin
  • Pyridylamine chelate resin for removing heavy metal cations in strong acid wastewater and preparation method of pyridylamine chelate resin
  • Pyridylamine chelate resin for removing heavy metal cations in strong acid wastewater and preparation method of pyridylamine chelate resin

Examples

Experimental program
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Effect test

Embodiment 1

[0045] Embodiment 1: a kind of pyridine amine chelating resin and preparation method thereof for removing heavy metal cations in strongly acidic waste water, its steps are:

[0046] (a) Add 150mL of an aqueous solution containing 4wt% gelatin and 15wt% NaCl to a 500mL three-neck flask equipped with a stirrer and a reflux condenser, heat up to 40°C at a stirring speed of 80rpm, and keep for 1h;

[0047] (b) Add an oil phase composed of 25g methyl acrylate, 5g divinylbenzene, 55mL toluene and 2g azobisisobutyronitrile to the three-necked flask of step (a) at a stirring speed of 60rpm, adjust the stirring speed, and control the oil phase. The bead size range is 50-300 μm, then the temperature is raised to 60°C at a rate of 4°C / min, the temperature is raised to 75°C for 10 hours, the temperature is raised to 110°C for 10 hours, and the polymerization reaction is continued for 10 hours ℃, polymerization reaction 15h. The reaction product was extracted with ethanol through a Soxhle...

Embodiment 2

[0050] Embodiment 2: a kind of pyridine amine chelating resin and preparation method thereof for removing heavy metal cations in strongly acidic waste water, its steps are:

[0051] (a) Add 150mL of an aqueous solution containing 4wt% gelatin and 15wt% NaCl to a 500mL three-neck flask equipped with a stirrer and a reflux condenser, heat up to 40°C at a stirring speed of 80rpm, and keep for 1h;

[0052] (b) Add an oil phase composed of 25g methyl acrylate, 5g divinylbenzene, 55mL toluene and 2g azobisisobutyronitrile to the three-necked flask of step (a) at a stirring speed of 60rpm, adjust the stirring speed, and control the oil phase. The bead size range is 50-300 μm, then the temperature is raised to 60°C at a rate of 4°C / min, the temperature is raised to 75°C for 10 hours, the temperature is raised to 110°C for 10 hours, and the polymerization reaction is continued for 10 hours ℃, polymerization reaction 15h. The reaction product was extracted with ethanol through a Soxhle...

Embodiment 3

[0055] Embodiment 3: a kind of pyridine amine chelating resin and preparation method thereof for removing heavy metal cations in strongly acidic waste water, its steps are:

[0056] (a) Add 150mL of an aqueous solution containing 4wt% gelatin and 15wt% NaCl to a 500mL three-neck flask equipped with a stirrer and a reflux condenser, heat up to 40°C at a stirring speed of 80rpm, and keep for 1h;

[0057] (b) Add an oil phase composed of 25g methyl acrylate, 5g divinylbenzene, 55mL toluene and 2g azobisisobutyronitrile to the three-necked flask of step (a) at a stirring speed of 60rpm, adjust the stirring speed, and control the oil phase. The bead size range is 50-300 μm, then the temperature is raised to 60°C at a rate of 4°C / min, the temperature is raised to 75°C for 10 hours, the temperature is raised to 110°C for 10 hours, and the polymerization reaction is continued for 10 hours ℃, polymerization reaction 15h. The reaction product was extracted with ethanol through a Soxhle...

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Abstract

The invention discloses pyridylamine chelate resin for removing heavy metal cations in strong acid wastewater and a preparation method of the pyridylamine chelate resin, which belongs to the field ofwater treatment. The pyridylamine chelating resin has the following structural units: x represents the number of units of an o-methylpyridylamine structure, x is greater than or equal to 1, n represents the number of structural units of a resin macromolecular skeleton, n is greater than or equal to 800 and less than or equal to 5000, and R1 represents H or an alkyl chain CH3; the applicable heavymetal cations comprise Cd (II), Ni (II), Cu (II), Zn (II), Co (II) and the like. The pyridylamine chelating resin provided by the invention is wide in preparation raw material source, low in cost, simple in synthesis steps and easy for large-scale production.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to a pyridine amine chelating resin for removing heavy metal cations in strongly acidic wastewater and a preparation method thereof. Background technique [0002] Most industrial activities related to heavy metals, such as mining and non-ferrous metal smelting, steel pickling, leaching and detoxification of solid waste containing heavy metals, etc., will produce a large amount of strongly acidic heavy metal wastewater, whose pH value is generally lower than 3.0. This type of wastewater not only contains complex heavy metal ions such as copper, nickel, zinc, and cadmium, but may also contain high concentrations of inorganic salts such as sodium sulfate and magnesium chloride. Due to its low pH value and complex heavy metal composition, strongly acidic heavy metal wastewater is more likely to seep through pipelines, and has greater potential environmental and health hazar...

Claims

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Application Information

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IPC IPC(8): B01J20/26B01J20/30C08F220/14C08F212/36C08F8/32C02F1/28C02F101/20
CPCB01J20/265C02F1/285C08F220/14C08F8/32B01J2220/4812C02F2101/20C08F212/36
Inventor 刘福强刘自成吕盈知徐晓明李杰李爱民
Owner NANJING UNIV
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