Hydrophobic cation polymeric flocculant preparation method

A polymer flocculant, cation technology, applied in the direction of 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 of rapid drying of the dredged sediment, and the weak hydrophobicity. , to achieve the effect of wide range of use, good flocculation effect and strong hydrophobicity

Active Publication Date: 2011-04-20
JIANGSU JIANGDA ECOLOGICAL SCI & TECHCO
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  • 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 preparation method

Examples

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Embodiment 1

[0023] Add acrylamide, methacryloxyethyl trimethyl ammonium chloride, cetyl trimethyl ammonium bromide, urea, and deionized water into a four-necked flask, stir and increase the temperature and add octadecyl vinyl Ether, after vigorously stirring, add initiator (a mixture of ammonium persulfate and sodium bisulfite with a mass ratio of 2:1), and react for 4 hours to prepare a hydrophobic cationic polymer flocculant. Acrylamide and methacrylic acid are involved in the reaction. The total amount of acyloxyethyl trimethyl ammonium chloride and octadecyl vinyl ether is recorded as the total monomer content. The acrylamide content accounts for 89.5 mol% of the total monomer content. The content of base ammonium chloride accounts for 10 mol% of the total monomers, the content of cetyltrimethylammonium bromide accounts for 6wt% of the total monomers, and the urea content accounts for 2wt% of the total monomers. The weight ratio of deionized water is 20:80, the octadecyl vinyl ether co...

Embodiment 2

[0031] Add acrylamide, methacryloyloxyethyl trimethyl ammonium chloride, cetyl trimethyl ammonium bromide, urea, and deionized water into a four-neck flask, stir and heat up and add octadecyl acrylate, strong After stirring, add an initiator (a mixture of ammonium persulfate and sodium bisulfite with a mass ratio of 2:1), keep the reaction for 4 hours to prepare a hydrophobic cationic polymer flocculant, and participate in the reaction of acrylamide and methacryloxy ethyl The total amount of trimethyl ammonium chloride and octadecyl vinyl ether is recorded as the total monomer content. The acrylamide content accounts for 86.5 mol% of the total monomer content. Methacryloxyethyl trimethyl chloride The ammonium content accounts for 10mol% of the total monomers, the cetyltrimethylammonium bromide content accounts for 6wt% of the total monomers, and the urea content accounts for 2wt% of the total monomers. The total monomers and deionized water The weight ratio of octadecyl vinyl e...

Embodiment 3

[0039] Add acrylamide, methacryloyloxyethyl trimethyl ammonium chloride, cetyl trimethyl ammonium bromide, urea, and deionized water into a four-neck flask, stir and heat up and add octadecyl acrylate, strong After stirring, add an initiator (a mixture of ammonium persulfate and sodium bisulfite with a mass ratio of 2:1), keep the reaction for 4 hours to prepare a hydrophobic cationic polymer flocculant, and participate in the reaction of acrylamide and methacryloxy ethyl The total amount of trimethyl ammonium chloride and octadecyl vinyl ether is recorded as the total monomer content. The acrylamide content accounts for 56.5 mol% of the total monomer content. Methacryloxyethyl trimethyl chloride The ammonium content accounts for 40mol% of the total monomers, the cetyltrimethylammonium bromide content accounts for 6wt% of the total monomers, and the urea content accounts for 2wt% of the total monomers. The total monomers and deionized water The weight ratio of octadecyl vinyl e...

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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. The invention also discloses a preparation method and application of the hydrophobic cationic polymer flocculant. Background technique [0002] Flocculation sedimentation method is currently one of the main methods used for sludge dewatering. It quickly destabilizes and settles mud particles through bridging, adsorption, association, etc., and achieves the effect of rapid mud-water separation. Due to the fine particles of river and lake sediments, low relative density, not easy to sink, compact, high water content and not easy to dewater, high-performance sludge dewatering flocculant must be added in the process of sediment treatment. Organic polymer flocculant is a kind of polymer with excellent flocculation. Compared with inorganic polymer flocculant, it has the advantages of small dosage, strong flocculation ability and fast flocculation speed, especially in improving the mechanical stren...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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