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Method for preparing highly-selective nickel ion absorption resin

A high-selectivity, adsorption resin technology, applied in the direction of chemical instruments and methods, ion exchange water/sewage treatment, other chemical processes, etc., can solve the problems of difficult metal ion recovery, undiscovered, limited selectivity, etc., and achieve the synthesis process The effect of simplicity and good application prospects

Inactive Publication Date: 2011-02-23
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patented modification improves upon existing methods such as chemical precipitation or electrospun polymerization techniques which have limitations with regards their ability to specifically bind certain types of metal atoms (nickels). By modifying this chemistry through molecularly imprinted technique, we aim to improve these properties while maintaining excellent binding capabilities.

Problems solved by technology

Technological Problem: The technical problem addressed by these inventors relates to improving the efficiency at treating water containing harmful chemical compounds such as nitrogen oxides (NO) from polluted waters through an effective process that can effectively remove certain types of impurities while maintaining high levels of purity.

Method used

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  • Method for preparing highly-selective nickel ion absorption resin
  • Method for preparing highly-selective nickel ion absorption resin
  • Method for preparing highly-selective nickel ion absorption resin

Examples

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preparation example Construction

[0024] The preparation method of the above-mentioned nickel ion highly selective adsorption resin, the method uses phenolic resin as a matrix to synthesize a resin with high selective adsorption of nickel ions, comprising the following steps:

[0025] (a) Put the formulated amount of phenol in a three-necked flask, heat to 50°C to melt, add 70% of the catalyst formulated amount, stir at constant temperature for 20 min, add formaldehyde formulated amount 70%， Continue to heat up to 60°C and stir at constant temperature for 50 minutes, then add the remaining catalyst, heat to 70°C and stir at constant temperature for 20 minutes, finally add the remaining formaldehyde, heat to 90°C, stir at constant temperature for 30 minutes, cool to 60°C to obtain phenolic formaldehyde resin;

[0026] (b) For the phenolic resin obtained in step (a), use 10~50ml of nickel sulfate solution with a molar concentration of 0.1mol / L as the template molecule and epichlorohydrin as the crosslinking agen...

Embodiment 1

[0031] Example 1: Take 10g of NaOH to prepare NaOH solution with a mass fraction of 40%, and take 82.5g of formaldehyde solution with a mass fraction of 40% for later use; take 45g of phenol into a three-necked flask, heat to 50°C and add 70% of the NaOH solution after melting, and stir at constant temperature 20min, then add 70% of the formaldehyde solution, continue to heat up to 60°C, then stir at a constant temperature for 50min, then add the remaining NaOH solution, heat up to 70°C, stir at a constant temperature for 20min, finally add the remaining formaldehyde solution, heat up to 90°C After stirring for 30min, cool to 60°C to obtain a phenolic resin; add 10ml of NiSO with a molar concentration of 0.1mol / L to the obtained phenolic resin 4 The solution is a template molecule, and 3g of epichlorohydrin is added as a cross-linking agent, and the temperature is raised to 90°C, and the stirring is continued for 30 minutes while heating, then the material is discharged and d...

Embodiment 2

[0032] Example 2: Take 8g of NaOH to prepare NaOH solution with a mass fraction of 40%, and take 100g of formaldehyde solution with a mass fraction of 40% for later use; take 45g of phenol into a three-necked flask, heat to 50°C and melt, add 70% of NaOH solution, and stir at constant temperature for 20min Finally, add 70% of the formaldehyde solution, heat up to 60°C and stir at a constant temperature for 50 minutes, then add the remaining NaOH solution, heat up to 70°C and stir at a constant temperature for 20 minutes, finally add the remaining formaldehyde solution, heat up to 90°C and continue at a constant temperature Stir for 30min, cool to 60°C to obtain phenolic resin; add 20ml 0.1mol / L NiSO to the obtained phenolic resin 4 The solution is a template molecule, and 7g of epichlorohydrin is added as a crosslinking agent, and the temperature is raised to 90°C, and the stirring is continued for 30 minutes while heating, then the material is discharged and dried at 105°C, ...

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Abstract

The invention discloses a highly-selective nickel ion absorption resin and a preparation method thereof. The prepared resin consists of the following raw materials in percentage by mass: 8 to 12 percent of catalyst, 45 to 55 percent of phenyl hydroxide, 30 to 40 percent of formaldehyde and 3 to 7 percent of crosslinker, wherein the sum of mass percent of the raw materials is 100. The preparation method comprises the following steps of: preparing a phenolic resin; heating the phenolic resin to 80 to 90 DEG C by taking the solution of nickel sulfate as a template molecule and taking epoxy chloropropane as the crosslinker, stirring for 30 minutes when heating, and discharging, drying, grinding and sieving the phenolic resin; and eluting the phenolic resin with an eluant until no nickel ions are detected, and oven-drying the product to obtain the finished product. The highly-selective nickel ion absorption resin can completely absorb nickel ions from nickel ionic solution; when 10mg/L copper ions and cadmium ions coexist in the solution, the resin can achieve uninfluenced absorption effect on the nickel ions and can absorb less than 5 percent of Cu<2+> and less than 15 percent of Cd<2+> so as to achieve the highly-selective Ni<2+> absorption effect; and the absorbed nickel ions are eluted by the solution of ammonium citrate so as to achieve good elution recycling effect.

Description

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Claims

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Application Information

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Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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