Method for preparing cationic organic flocculant by using paper-making sludge

An organic flocculant and papermaking sludge technology, which is applied in sludge treatment, chemical instruments and methods, water/sludge/sewage treatment, etc., to achieve the effect of increasing the removal of anion impurities, facilitating purification, and excellent removal effect

Active Publication Date: 2014-08-06
SHANDONG UNIV
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  • Abstract
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After searching, there is no report on the related technology of synthesizing cationic polymer organic flocculant with papermaking sludge as raw material

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  • Method for preparing cationic organic flocculant by using paper-making sludge
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  • Method for preparing cationic organic flocculant by using paper-making sludge

Examples

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Embodiment 1

[0031] Embodiment 1. Preparation of cationic organic flocculant (L-AM-N) with different disodium edetate additions

[0032] (1) Take 2.0g of papermaking sludge, add 60ml deionized water and 10wt% NaOH solution, stir, make the pH stable at about 11.5, centrifuge at 8000rpm for 15min, take the supernatant and place it in the reactor, adjust the pH to 7.5;

[0033] (2) Put the reactor into a 70°C water bath, stir for 5 minutes, add potassium peroxodisulfate with a mass of 50 mg, and activate with nitrogen gas for 10 min, add disodium edetate with a mass of 40 mg, 50 mg, 60 mg, and 70 mg respectively , react for 5 minutes, add 2g of acrylamide monomer, add 8ml of 60wt% dimethyl diallyl ammonium chloride solution, continue to pass nitrogen for 5 minutes, and continue to react for 4 hours at 70°C;

[0034] (3) After the reaction, cool to room temperature, add 200ml of acetone to precipitate the product, filter, and vacuum-dry the filter residue at 60°C to obtain four products with ...

Embodiment 2

[0035] Embodiment 2. The preparation of the cationic organic flocculant (L-AM-N) of different dimethyl diallyl ammonium chloride addition amount

[0036] (1) Take 2.0g of papermaking sludge, add 60ml deionized water and 10wt% NaOH solution, stir, make the pH stable at about 11.5, centrifuge at 8000rpm for 15min, take the supernatant and place it in the reactor, adjust the pH to 7.5;

[0037] (2) Put the reactor into a water bath at 70°C, stir for 5 minutes, add potassium peroxodisulfate to a mass of 50 mg, activate with nitrogen for 10 minutes, add 60 mg of disodium edetate, react for 5 minutes, add 2 g of acrylamide mono body, add 60wt% dimethyl diallyl ammonium chloride solution in volumes of 4ml, 6ml, 8ml, 10ml respectively, continue to pass nitrogen gas for 5min, and continue to react for 4h at 70°C;

[0038] (3) After the reaction, cool to room temperature, add 200ml of acetone to precipitate the product, filter, and vacuum-dry the filter residue at 60°C to obtain four p...

Embodiment 3

[0039] Example 3. Preparation of cationic organic flocculants (L-AM-N) with different acrylamide additions

[0040]The steps are the same as in Example 2, except that the volume of the dimethyldiallylammonium chloride solution in the step (2) is fixed to 8ml, and the amount of acrylamide is respectively 1.5g, 2.0g, 2.5g, 3.0g to obtain cationic organic flocculant products with different acrylamide additions.

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Abstract

The invention relates to a method for preparing a cationic organic flocculant by using paper-making sludge. The method comprises the following steps: directly dissolving a raw material by using an alkali liquid, centrifuging to separate supernate, adjusting the pH value of the solution, putting into a reactor, heating till a certain temperature, adding potassium peroxydisulfate and ethylenediamine tetraacetic acid, introducing nitrogen, stirring to activate for certain time, further adding acrylamide and a dimethyl diallyl ammonium chloride solution to the reactor, continuously introducing nitrogen, stirring for reaction, subsequently pouring into acetone to separate out a reaction product, and drying the filter residue in vacuum, thereby obtaining a flocculant product. When the prepared flocculant is used for treating a simulation water sample, the addition amount is 2mg / l, the UV254 removal rate is about 85%, and the DOC removal rate is about 70%. The method is simple in process, low in equipment requirement and beneficial for industrial production and application, not only is reuse of paper-making wastes achieved, but also the prepared flocculant product is environment-friendly, free of toxicity and high in efficiency, and the water treatment cost can be lowered.

Description

technical field [0001] The invention relates to a method for synthesizing a cationic macromolecular organic flocculant by using sludge produced in an alkaline papermaking process as a main raw material, and belongs to the technical field of waste resource utilization and water treatment flocculants. technical background [0002] With the rapid growth of my country's population and the continuous development of industry and agriculture, the demand for water resources is increasing day by day. At the same time, many water sources in our country are polluted to varying degrees, which further exacerbates the contradiction of water shortage. Water resources have become one of the important factors restricting our people's living standards and economic development. [0003] After the emergence of water pollution problems, various methods of sewage treatment have emerged as the times require, and have experienced a process of rapid development. Chemical coagulation has the advant...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/56C02F11/00
Inventor 高宝玉李瑞华孙阳阳荣红岩岳钦艳王燕
Owner SHANDONG UNIV
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