Preparation of anionic modified nature macromolecule polymer flocculant

An anionic flocculant technology, applied in the direction of flocculation/sedimentation water/sewage treatment, water/sludge/sewage treatment, water/sewage treatment, etc. High conversion rate, good effect, less dosage effect

Inactive Publication Date: 2014-04-30
YANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as a raw material, there are many shortcomings in the application of raw starch, such as too fast biodegradation, large swelling in water

Method used

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  • Preparation of anionic modified nature macromolecule polymer flocculant

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0020] 1. Preparation of anionic modified natural polymer flocculant:

[0021] Take 20-30% starch (may or potato starch) and disperse it in 50-100% distilled water, add NaCl, stir and mix evenly, adjust the pH to 10, add epichlorohydrin, and react at 30°C for 3 hours to obtain the modified product. permanent starch.

[0022] Disperse 2-4g of modified starch in 60-90g of distilled water, stir and disperse for 10 minutes, then heat up to 95°C under constant stirring in the heating and cooling equipment, keep warm and gelatinize for 20min, then cool down to 35°C and pass nitrogen gas for 20- After 30 minutes, add 7-9g of acrylamide, continue to pass nitrogen gas for 15 minutes, add the initiator ammonium persulfate (added at 5%), and the system will initiate polymerization after 20-30 minutes. The reaction was carried out at 45°C for 4 hours.

[0023] After completion, the reaction system mixture was precipitated with acetone and washed with ethanol, and the crude product was v...

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PUM

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Abstract

The invention provides preparation of an anionic modified nature macromolecule polymer flocculant, and belongs to the technical field of macromolecules, particularly to the technical field of starch grafting copolymer preparation. The preparation comprises: carrying out thermal insulation gelatinization on modified starch prepared from starch, water and epichlorohydrin in distilled water, and then adding a solid acrylamide; adding an initiator to initiate a polymerization reaction to obtain a grafting copolymer crude product; and purifying, adding NaOH and CS2, and carrying out water bath until the color becomes orange. The nionic modified nature macromolecule polymer flocculant has characteristics of high grafting rate, high conversion rate, less use amount and good effect. Compared with the pure anionic polyacrylamide, the anionic modified nature macromolecule polymer flocculant has the following characteristics that: characteristics of low project cost, easy use and environmental protection are provided, and the heavy metal ion removal rate is more than 98%.

Description

technical field [0001] The invention belongs to the technical field of macromolecules, in particular to the technical field of preparation of starch graft copolymers. Background technique [0002] With the increasing scale of industrial production, the amount of wastewater containing heavy metal ions is increasing, and heavy metal ions have become one of the most serious and common water pollutants. Heavy metal ions are often acutely or chronically toxic and sometimes poison the human body in more complex ways. Therefore, removing heavy metal ions in water and reducing their harm to human survival is one of the important tasks of industrial production. [0003] Urban domestic sewage and industrial wastewater need to be properly treated to remove suspended solids, organic matter and other pollutants in the water before discharge. At present, the wastewater treatment method commonly used at home and abroad is the flocculation sedimentation method, which is economical and sim...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F251/00C08F220/56C08F8/00C08B31/12C02F1/56C02F1/62
Inventor 刁国旺秦贞贞狄健黄建祥
Owner YANGZHOU UNIV
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