Anidoximated globular lignin macroporous chelate adsorption resin and preparation technique thereof

A technology of chelation adsorption and adsorption resin, which is applied in the field of functional polymers to achieve high coordination ability and broaden the development path

Active Publication Date: 2009-02-04
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are a few studies on lignin-based ion exchange resins at home and abroad, but the present invention utilizes lignin, a cheap and resource-rich natural polymer, to prepare amidoximated spherical lignin chelating adsorption resins, but there are no related reports

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The specific process steps and the order of the present embodiment are as follows:

[0036] Raw materials and formula (unit-kg) of graft copolymerization and amidoximation reaction step:

[0037] Spherical lignin beads (water content 50%, particle size 300-1200μm): 5.0 kg

[0038] Acrylonitrile: 7.5 kg

[0039] Distilled water: 73.6 kg

[0040] Initiator (ammonium cerium sulfate): 0.05 kg

[0041] Hydroxylamine salt (hydroxylamine hydrochloride): 1.05 kg

[0042] Alkaline reagent (sodium carbonate): 0.8 kg

[0043] Solvent (distilled water): 12.0 kg

[0044] Graft copolymerization and amidoximation reaction process steps and process parameters:

[0045] In the automatic feeding device equipped with stirring and built-in constant temperature system, add spherical lignin beads, distilled water and initiator, normal temperature 2 After deoxygenation for 15 minutes, add the calculated amount of acrylonitrile, react for 50 minutes, wash with methanol and water respect...

Embodiment 2

[0048] The specific process steps and the order of the present embodiment are as follows:

[0049] Raw materials and formula (unit-kg) of graft copolymerization and amidoximation reaction steps:

[0050] Spherical lignin beads (water content 75%, particle size 300-1200μm): 16.0 kg

[0051] Acrylonitrile: 8.0 kg

[0052] Distilled water: 60.4 kg

[0053] Initiator (ammonium cerium nitrate): 0.05 kg

[0054] Hydroxylamine salt (hydroxylamine hydrochloride): 1.45 kg

[0055] Alkaline reagent (sodium carbonate): 1.1 kg

[0056] Solvent (distilled water): 15.0 kg

[0057] Graft copolymerization and amidoximation reaction step process steps and process parameters:

[0058] In the automatic feeding device equipped with stirring and built-in constant temperature system, add spherical lignin beads, distilled water and initiator. Washed with water, then extracted with N,N-dimethylformamide (DMF) at 50° C. for 24 hours to remove the homopolymer, washed with water and dried to obta...

Embodiment 3

[0061] The specific process steps and the order of the present embodiment are as follows:

[0062] Raw materials and formula (unit-kg) of graft copolymerization and amidoximation reaction step:

[0063] Spherical lignin beads (water content 60%, particle size 300-1200μm): 8.0 kg

[0064] Acrylonitrile: 8.0 kg

[0065] Distilled water: 62.65 kg

[0066] Initiator (potassium persulfate): 0.05 kg

[0067] Hydroxylamine salt (hydroxylamine sulfate): 1.48 kg

[0068] Alkaline reagent (sodium hydroxide): 0.72 kg

[0069] Solvent (methanol): 19.0 kg

[0070] Graft copolymerization and amidoximation reaction process steps and process parameters:

[0071] In the automatic feeding device equipped with stirring and built-in constant temperature system, add spherical lignin beads, distilled water and initiator. Wash with water, and extract with N,N-dimethylformamide (DMF) at 50°C for 24 hours to remove the homopolymer, wash with water and dry to obtain a spherical lignin graft copo...

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Abstract

The invention discloses an amidoxime spherical lignin chelate adsorbing resin and a preparation method thereof. A spherical lignin bead is prepared by adopting reversed-phase suspension polymerization techniques of programmed heating, crosslinking and solidification and taking concentrated pulping black liquor or concentrated pulping red liquor as a raw material. The spherical lignin bead is grafted with copolymerized acrylonitrile through further amidoxime to obtain the spherical lignin chelate adsorbing resin which has the grain-size average pore size of 5-150nm, the uniformity coefficient of not more than 1.30, the specific surface area of 30-480m<2> / g, the water content of 55-75%, the bulk density of 0.60-0.73g / ml, the bulk volume of 2.25-5.80ml / g, the amidoxime group content of 6.51-15.85mmol / g and the chelate adsorption capacity of 5-15 mmol / g. The method of the invention is simple for operation, has low production cost, is expected to be of value in the practical application to the enrichment recovery of noble metals and the extraction of uranium from seawater.

Description

technical field [0001] The invention belongs to the field of functional polymers, and in particular relates to an amidoxime spherical lignin chelating adsorption resin and a preparation process thereof. Background technique [0002] In today's world, the reserves of oil and natural gas resources are limited, and their research, development and utilization have an increasingly serious impact on the earth's ecological environment, which has prompted the vigorous development of polymer materials that use natural resources as raw materials. Lignin is one of the most abundant and renewable natural polymer resources of cellulose and chitin in nature. Land plants in the world can produce 50 billion tons of lignin every year, of which 50 million tons of industrial lignin are produced in the cooking waste liquid of the pulp and paper industry. Human beings have used cellulose for thousands of years, but it was after 1930 that the real study of lignin began, and lignin has not been w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24
Inventor 刘明华陈国奋林兆慧
Owner FUZHOU UNIV
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