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Preparation method of arsenic removal adsorbent based on polyacrylonitrile-itaconic acid

A technology of polyacrylonitrile and itaconic acid is applied in chemical instruments and methods, adsorption water/sewage treatment, water/sludge/sewage treatment, etc. The effect of high amount, simple synthesis process and mild reaction conditions

Inactive Publication Date: 2014-09-10
LUDONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The Chinese invention patent with the publication number CN102233256A discloses that natural siderite powder is mixed with a binder to obtain a mixed viscous substance, and then the obtained mixed viscous substance is subjected to wet extrusion granulation and burning to obtain arsenic removal and adsorption The Chinese invention patent with the publication number CN102397775A discloses that the silicon oxide gel is first obtained through the sol-gel method, then the amino group is inserted into the amino group through a hydrothermal reaction, and then complexed with ferric chloride, and then dried to obtain the arsenic-removing adsorbent. The treatment agent has the characteristics of large specific surface area, high adsorption capacity, and fast adsorption speed; the Chinese invention patent with the publication number of CN101422720A discloses the in-situ generation of composite metal oxides based on iron oxides, manganese oxides, and aluminum oxides. Arsenic adsorbent and application method; the preparation methods of the above-mentioned series of arsenic removal adsorbents are all based on inorganic materials, the preparation method is complicated, and the adsorption amount of arsenic is low
The Chinese invention patent with the publication number CN100344365C discloses a method for preparing an arsenic-removing adsorbent using macroporous and gel-type strongly basic anion-exchange resins as basic raw materials. During the preparation of the arsenic-removing adsorbent, iron trichloride , hydrochloric acid, sodium chloride mixed aqueous solution and sodium hydroxide, sodium chloride mixed solution regeneration cumbersome steps

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Add 7.8 milliliters of acrylonitrile, 1.5 grams of itaconic acid, 4.6 milliliters of cyclohexane, 7.6 milliliters of Span 80 and 0.51 grams of azobisisobutyronitrile respectively in a round bottom flask, mechanically stir the reaction mixture for 20 minutes, and then Slowly add 80 milliliters of calcium chloride solution with a concentration of 0.5% in the round bottom flask, stop stirring after the dropwise addition and continue to stir for 1 h. The round bottom flask was placed in a constant temperature water bath at 70°C for 5 hours to react. After the reaction, the product was filtered out, transferred to a Soxhlet extractor and extracted with ethanol for 10 hours, and finally vacuum-dried at 50° C. for 48 hours to obtain polyacrylonitrile-itaconic acid.

[0013] After mixing 5 grams of polyacrylonitrile-itaconic acid with 7.5 grams of hydroxylamine hydrochloride and 50 milliliters of methanol, adjust the pH of the solution to about 8 with sodium hydroxide solution,...

Embodiment 2

[0016] 7.8 milliliters of acrylonitrile, 0.76 grams of itaconic acid, 4.6 milliliters of cyclohexane, 7.6 milliliters of Span 80 and 0.50 grams of azobisisobutyronitrile were added to a round-bottomed flask, and the reaction mixture was mechanically stirred for 20 minutes. Slowly add 80 milliliters of calcium chloride solution with a concentration of 0.5% in the round-bottomed flask again, stop stirring after the dropwise addition and continue stirring for 1 h. The round bottom flask was placed in a constant temperature water bath at 70°C for 5 hours to react. After the reaction, the product was filtered out, transferred to a Soxhlet extractor and extracted with ethanol for 10 hours, and finally vacuum-dried at 50° C. for 48 hours to obtain polyacrylonitrile-itaconic acid.

[0017] The preparation of hydroxylamine-modified polyacrylonitrile-itaconic acid is the same as that in Example 1. Mix 1 gram of hydroxylamine-modified polyacrylonitrile-itaconic acid with 500 ml of ferri...

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Abstract

The invention discloses a preparation method of an arsenic removal adsorbent based on polyacrylonitrile-itaconic acid. The preparation method comprises the following steps: with polyacrylonitrile, itaconic acid and azodiisobutyronitrile as basic raw materials, polymerizing with a high-internal-phase-ratio emulsion template method first, so as to obtain polyacrylonitrile-itaconic acid, then reacting polyacrylonitrile-itaconic acid with hydroxylamine hydrochloride, so as to obtain hydroxylamine modified polyacrylonitrile-itaconic acid, and finally, reacting hydroxylamine modified polyacrylonitrile-itaconic acid with a ferric trichloride solution, so as to prepare the polyacrylonitrile-itaconic acid arsenic removal adsorbent. The arsenic removal adsorbent has high adsorptive selectivity to arsenic in water and can be applied to removal of trace arsenic from a water solution.

Description

technical field [0001] The invention relates to a preparation method of an adsorbent for removing arsenic based on polyacrylonitrile-itaconic acid. Background technique [0002] Drinking natural water or drinking water with excessive arsenic content for a long time can cause diseases such as skin cancer, lung cancer, bladder cancer, and kidney cancer. At the same time, it can also cause skin pigmentation changes, hyperkeratosis, and neurological disorders. Therefore, excessive arsenic pollution in water has become an urgent problem to be solved worldwide. The adsorption of arsenic on the surface of the adsorbent is considered to be an effective method for removing arsenic from water. Activated carbon impregnated with metal ions, natural iron ore powder, iron oxide-coated inorganic materials, amino-modified silica gel, iron-loaded ion exchange resins, etc. can all be used for the removal of arsenic in water. The Chinese invention patent with the publication number CN1037364...

Claims

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Application Information

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IPC IPC(8): B01J20/24B01J20/30C02F1/28C02F1/58
Inventor 纪春暖曲荣君陈厚
Owner LUDONG UNIVERSITY