Starch-based quaternary ammonium salt green flocculant and preparation method

A technology based on quaternary ammonium salt and flocculant, which is applied in the field of preparation of starch-grafted acrylamide and alkyl allyl dimethyl ammonium chloride copolymer, which can solve the problem of high residual monomer content and low grafting efficiency. question

Inactive Publication Date: 2010-02-03
SHANDONG GUOXIN ENVIRONMENTAL SYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

To solve the problems of low grafting efficiency

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Add accurately weighed 40wt% starch into a 250mL three-necked flask equipped with a stirrer, a thermometer and a dropping funnel, dissolve it with an appropriate amount of deionized water under stirring, heat to 40°C, and pass through ordinary nitrogen for 0.5h. Pure nitrogen 0.5h, add 0.01wt% co-initiator ethylenediaminetetraacetic acid and a certain amount of initiator ammonium persulfate-acetic acid-urea, the proportion is 0.6:0.7:0.8, after 10min of initiation, the prepared 10wt % acrylamide and 50wt% alkyl allyl dimethyl ammonium chloride are slowly added through the dropping funnel, after 0.5 hours of reaction, all the remaining initiators are added, and after 3.5 hours of polymerization reaction, the starch graft copolymer is obtained .

Embodiment 2

[0024] Add accurately weighed 40wt% starch into a 250mL three-necked flask equipped with a stirrer, a thermometer and a dropping funnel, dissolve it with an appropriate amount of deionized water under stirring, heat to 45°C, and pass through ordinary nitrogen for 0.5h. Pure nitrogen for 0.5h, add 0.02wt% co-initiator ethylenediaminetetraacetic acid and a certain amount of initiator potassium permanganate-sulfuric acid-ferrous sulfate, the proportion is 0.7:0.8:0.8, after 10min of initiation, the prepared 15wt% acrylamide and 45wt% alkylallyl dimethyl ammonium chloride were slowly added through the dropping funnel, and after 0.5 hours of reaction, all the remaining initiators were added, and after 3.5 hours of polymerization reaction, the starch grafted copolymer.

Embodiment 3

[0026] Add accurately weighed 45wt% starch into a 250mL three-neck flask equipped with a stirrer, a thermometer and a dropping funnel, dissolve it with an appropriate amount of deionized water under stirring, heat to 45°C, and pass through ordinary nitrogen for 0.5h. Pure nitrogen 0.5h, add 0.02wt% co-initiator ethylenediaminetetraacetic acid and a certain amount of initiator cerium ammonium sulfate-ferrous sulfate-oxalic acid, the proportion is 1:1:0.9, after 10min of initiation, the prepared 15wt% acrylamide and 40wt% alkylallyl dimethyl ammonium chloride were slowly added through the dropping funnel, after 1 hour of reaction, all the remaining initiators were added, and after 3 hours of polymerization reaction, the starch grafted copolymer was obtained.

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PUM

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Abstract

A starch-based quaternary ammonium salt environmentally friendly flocculant belongs to the technical field of environmentally friendly materials. The invention is characterized in that the flocculanttakes the starch as a base material, long chain alkyl allyl dimethyl ammonium chloride and acrylamide as monomers and water as a reaction medium to prepare an efficient starch graft copolymer throughchemical graft polymerization reaction of solution in the presence of a composite initiator. The flocculant comprises the following raw material formula by weight percent: 40-50wt% of starch, 10-20wt%of acrylamide and 30-50wt% of alkyl allyl dimethyl ammonium chloride; under the protection of nitrogen, 0.05-1wt% of initiator and 0.01-0.05wt% of auxiliary initiator are added. The preparation method comprises the following working procedures: (1) pulping, (2) monomer preparing, (3) deoxidizing, (4) initiating and (5) reaction, etc. The flocculant prepared by the method not only has the effectsof adsorbing, bridging and flocculating but also has the anti-bacteria and anti-algae effects, and can be widely applied to such industries as petroleum, municipal sludge dewatering, papermaking, slaughtering and the like.

Description

technical field [0001] The invention belongs to the technical field of environmental protection materials, and relates to a preparation method of starch-grafted acrylamide and alkylallyl dimethyl ammonium chloride copolymer. Background technique [0002] Starch, the final product of photosynthesis in green plants, is the most abundant renewable resource biosynthesized, and its renewable has become the focus of attention. Starch and starch chemicals have the characteristics of low toxicity, easy biodegradation, and good environmental adaptability. They are widely used in many fields of the national economy such as papermaking, daily chemicals, textiles, petroleum, food, building materials, printing and dyeing, leather, water treatment, and soil and water conservation. Wide range of applications. Starch graft copolymer is a new type of polymer material. The research on graft copolymerization reaction and copolymer derivatives has unique significance in starch conversion tech...

Claims

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Application Information

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IPC IPC(8): C02F1/56C08F251/00C08F2/10
Inventor 刘福东李应龙
Owner SHANDONG GUOXIN ENVIRONMENTAL SYST
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