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Macromolecule of poly(N-hexyl hydroximic acid acrylamide), and preparation and application methods thereof

A technology of hexylhydroxamic acid acrylamide and an application method, which is applied to the polymer of poly-N-hexylhydroxamic acid acrylamide and its preparation and application fields, can solve the problems that the application of amide group and hydroxime group has not yet been reported, and the like, To achieve the effect of simple preparation process, simple product separation and high reaction efficiency

Active Publication Date: 2013-09-18
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the preparation and application of polymers with amide and hydroxime groups in the molecule have not been reported yet.

Method used

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  • Macromolecule of poly(N-hexyl hydroximic acid acrylamide), and preparation and application methods thereof
  • Macromolecule of poly(N-hexyl hydroximic acid acrylamide), and preparation and application methods thereof
  • Macromolecule of poly(N-hexyl hydroximic acid acrylamide), and preparation and application methods thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0025] Embodiment 1: Preparation of low molecular weight linear poly N-hexyl hydroxamic acid acrylamide

[0026] Add 28 parts of 6-aminohexyl hydroxamic acid and 7.20 parts of polyacrylic acid with an average molecular weight of 3000 into the reactor, heat to 120°C under stirring, react for 3 hours, and filter to obtain linear poly N-hexyl hydroxamic acid acrylamide Solid, the product yield is 98.3%, according to elemental analysis results, the hydroximation rate of polyacrylic acid is calculated to be 98.6%, and its infrared spectrum is shown in figure 1 , 3000~3400cm -1 It is N-H and O-H stretching vibration; 2940cm -1 It is saturated C-H stretching vibration; 1723cm -1 It is C=O stretching vibration, 1609cm -1 is the stretching vibration of the secondary amide.

[0027] Take 100 parts of Fe(III), Cu(II), Ni(II) metal ion solutions with a concentration of 10mmol / L, adjust the pH value to 5.5 with sulfuric acid, and add 0.1 parts of low molecular weight linear poly N-hexy...

Embodiment 2

[0028] Embodiment 2: the preparation of high molecular weight linear poly N-hexyl hydroxamic acid acrylamide

[0029] 28 parts of 6-aminohexyl hydroxamic acid and 7.20 parts of average molecular weight are 2×10 6 Add polyacrylic acid into the reactor, heat to 130°C under stirring, react for 3 hours, and filter to obtain linear poly-N-hexylhydroxamic acid acrylamide solid, the product yield is 99.5%, and the hydroxamation rate is 97.7%.

[0030] Dissolve poly N-hexyl hydroxamic acid acrylamide in sodium hydroxide solution, add it to the red mud slurry with a solid content of 25%, the dosage of poly N-hexyl hydroxamic acid acrylamide is 5mg / L, after 20 minutes, measure The red mud deposition height is 26.2% of the slurry height; the average molecular weight is 2×10 6 Polyacrylic acid is used as flocculant. Under the same conditions as above, the red mud deposition height is measured to be 30.4% of the pulp height, indicating that the flocculation and sedimentation performance o...

Embodiment 3

[0031] Embodiment 3: the preparation of poly N-hexylhydroxamic acid acrylamide resin

[0032] Add 28 parts of 6-aminohexyl hydroxamic acid and 8.62 parts of macroporous polyacrylic acid resin D113 into the reactor, heat to 150°C under stirring, react for 3 hours, and filter to obtain poly-N-hexyl hydroxamic acid acrylamide resin, The product yield is 97.7%, and the hydroximation rate is 97.2%. Its infrared spectrogram is shown in figure 2 , 3000~3400cm -1 It is N-H and O-H stretching vibration; 2939cm -1 It is saturated C-H stretching vibration; 1711cm -1 It is C=O stretching vibration, 1625cm -1 is the stretching vibration of the secondary amide. According to the literature (Shuai Wang, Gang Zhao, Zhongnan Wang, et al. Applied Mechanics and Materials, 2012, 161: 200-204), polymethacryl hydroxamic acid resin was prepared for adsorption performance comparison.

[0033] Prepare Fe(III), Cu(II), Ni(II), La(III) and Y(III) metal ion solutions with a concentration of 1g / L res...

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Abstract

The invention relates to a macromolecule of poly(N-hexyl hydroximic acid acrylamide), and preparation and application methods thereof. The macromolecule of poly(N-hexyl hydroximic acid acrylamide) has a basic unit structure shown by the formula (I). The preparation method comprises the steps: by taking polyacrylic acid macromolecules and 6-aminohexyl hydroximic acid as active ingredients, controlling the mole ratio of carboxyl to amino in the active ingredients to be 1:(1-2) at the reaction temperature of 100-160 DEG C, reacting for 1-4 hours to produce the poly(N-hexyl hydroximic acid acrylamide) macromolecule solid product with the structure shown by the formula (I). In the preparation method, no addition solvent is needed, the reaction processes are simple and convenient, the reaction time is short, the productivity and hydroximic efficiency are high, the amide group and hydroximic group of the prepared macromolecule has synergistic coordination effect to transition metal ions, so that the macromolecule can be used as aflocculant, precipitatnt, or an adsorbent of metal ions such as iron, copper, cobalt, nickel, lanthanum, cerium, yttrium, praseodymium, neodymium and the like.

Description

technical field [0001] The invention relates to a poly N-hexylhydroxamic acid acrylamide polymer compound and a preparation and application method thereof. The hydroxamic acid polymer prepared by the invention has a large adsorption capacity and higher selectivity to metal ions. Background technique [0002] Hydroxamic acid compounds are widely used in the fields of flotation of metal oxide ores, solvent extraction, chemical analysis, medicine and sewage treatment because of their unique coordination structure and excellent coordination performance with metal ions. Hydroxamic acid resin is also used in the separation and enrichment of iron, copper, rare earth and other metal ions. [0003] Polymers containing hydroxamic acid groups are currently used in the mineral processing industry for sedimentation treatment of red mud and treatment of industrial wastewater. Patent CN1872885A discloses a method for preparing high-molecular-weight water-soluble polymers containing hydrox...

Claims

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Application Information

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IPC IPC(8): C08F120/02C08F8/32B01J20/26B01D15/08B01D21/01
Inventor 王帅钟宏邓兰青王晴彭静
Owner CENT SOUTH UNIV
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