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Hydrophobic cation polymeric flocculant and preparation method and application thereof

A polymer flocculant and cation technology, which is used in dewatering/drying/concentrating sludge treatment, etc., can solve the problems such as the inability to effectively improve the dewatering rate of the sediment, the difficulty in drying the dredged sediment quickly, and the poor hydrophobicity. , to achieve the effect of wide range of use, good flocculation effect and strong hydrophobicity

Active Publication Date: 2010-01-06
JIANGSU JIANGDA ECOLOGICAL SCI & TECHCO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, the synthesis of cationic polymer flocculants mainly includes methacryloyloxyethyltrimethylammonium chloride (DMC), acryloyloxyethyltrimethylammonium chloride (DAC), diallyldimethyl Ammonium chloride (DMDAAC) is prepared by copolymerization with acrylamide (AM), but the commercially available cationic organic flocculant cannot effectively improve the dehydration rate of the sediment due to its weak hydrophobicity, which makes it difficult to quickly dry the dredged sediment. Therefore, it is necessary to improve the hydrophobicity of the flocculant, thereby increasing the dewatering rate of the sediment

Method used

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  • Hydrophobic cation polymeric flocculant and preparation method and application thereof
  • Hydrophobic cation polymeric flocculant and preparation method and application thereof
  • Hydrophobic cation polymeric flocculant and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0023] Add acrylamide, methacryloyloxyethyltrimethylammonium chloride, cetyltrimethylammonium bromide, urea and deionized water into a four-necked flask, stir to raise the temperature and add octadecylvinyl Ether, add initiator (ammonium persulfate, sodium bisulfite mass ratio of 2:1 mixture) after strong stirring, heat preservation reaction for 4 hours to prepare hydrophobic cationic polymer flocculant, acrylamide, methyl The total amount of acryloyloxyethyltrimethylammonium chloride and octadecyl vinyl ether is recorded as the total monomer amount, wherein the acrylamide content accounts for 89.5mol% of the total monomer amount, and the methacryloyloxyethyl trimethyl ammonium The content of methyl ammonium chloride accounts for 10mol% of the total amount of monomers, the content of cetyltrimethylammonium bromide accounts for 6wt% of the total amount of monomers, the content of urea accounts for 2wt% of the total amount of monomers, the total amount of monomers The weight rat...

Embodiment 2

[0031] Add acrylamide, methacryloyloxyethyltrimethylammonium chloride, cetyltrimethylammonium bromide, urea, and deionized water into a four-necked flask, stir to raise the temperature, and add stearyl acrylate. After stirring, add an initiator (a mixture of ammonium persulfate and sodium bisulfite with a mass ratio of 2:1), and keep warm for 4 hours to prepare a hydrophobic cationic polymer flocculant. The acrylamide, methacryloxy The total amount of ethyltrimethylammonium chloride and octadecyl vinyl ether is recorded as the total monomer amount, wherein the acrylamide content accounts for 86.5mol% of the total monomer amount, and methacryloyloxyethyl trimethyl chloride The ammonium chloride content accounts for 10mol% of the total monomer amount, the cetyltrimethylammonium bromide content accounts for 6wt% of the total monomer amount, and the urea content accounts for 2wt% of the total monomer amount. The total monomer amount and deionized The weight ratio of water is 20:80...

Embodiment 3

[0039] Add acrylamide, methacryloyloxyethyltrimethylammonium chloride, cetyltrimethylammonium bromide, urea, and deionized water into a four-necked flask, stir to raise the temperature, and add stearyl acrylate. After stirring, add an initiator (a mixture of ammonium persulfate and sodium bisulfite with a mass ratio of 2:1), and keep warm for 4 hours to prepare a hydrophobic cationic polymer flocculant. The acrylamide, methacryloxy The total amount of ethyltrimethylammonium chloride and octadecyl vinyl ether is recorded as the total monomer amount, wherein the acrylamide content accounts for 56.5mol% of the total monomer amount, and methacryloyloxyethyl trimethyl chloride The ammonium chloride content accounts for 40mol% of the total monomer amount, the cetyltrimethylammonium bromide content accounts for 6wt% of the total monomer amount, and the urea content accounts for 2wt% of the total monomer amount. The total monomer amount and deionized The weight ratio of water is 20:80...

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Abstract

The invention discloses hydrophobic cation polymeric flocculant and a preparation method and application thereof. The preparation method comprises the following steps: adding acrylamide, methyl oxiranyl trimethyl ammonium chloride and octadecyl vinyl ether into a reaction vessel with the mol ratio of (89.5-5.5) to (10-40) to (0.5-3.5); adding a urea cation surface active; adding deionized water and stirring to dissolve the mixture in the reaction vessel;, raising the temperature of the mixed solution to 30-35 DEG C; adding octadecyl vinyl ether into the reaction vessel again and stirring evenly, adding an evocating agent into the reaction vessel; keeping the temperature at 30-35 DEG C to carry out polyreaction; obtaining a translucent or milky colloidal product after the reaction is carried out for 3-6 hours; pouring the translucent or milky colloidal product into acetone to be precipitated; taking out the sediment; and extracting the sentiment for 24 hours by ethanol to obtain the hydrophobic cation polymeric flocculant. The invention has the advantages of simple preparation process and remarkable flocculating and dewatering effect for substrate sludge.

Description

technical field [0001] The invention discloses a hydrophobic cationic polymer flocculant, and also discloses a preparation method and application of the hydrophobic cationic polymer flocculant. Background technique [0002] The flocculation sedimentation method is one of the main methods currently used for sludge dewatering. It makes the mud particles destabilize and settle rapidly through bridging, adsorption, association, etc., and achieves the effect of rapid mud-water separation. Due to the fine particles of river and lake bottom sludge, low relative density, not easy to sink and compact, high water content and difficult to dehydrate, therefore, high-performance sludge dewatering flocculant must be added in the bottom sludge treatment process. Organic polymer flocculant is a polymer with excellent flocculation effect. Compared with inorganic polymer flocculants, it has the advantages of small dosage, strong flocculation ability and fast flocculation speed, especially in ...

Claims

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Application Information

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IPC IPC(8): C02F11/14C08F220/56
Inventor 陈洪龄沈斌吕志刚
Owner JIANGSU JIANGDA ECOLOGICAL SCI & TECHCO
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