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A kind of flocculant with network interpenetrating structure and preparation method thereof

A network interpenetrating, flocculant technology, applied in chemical instruments and methods, flocculation/sedimentation water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problems of poor water solubility, small molecular weight, and uneven charge distribution.

Active Publication Date: 2021-12-28
SHANDONG NUOER BIOLOGICAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the commonly used polyacrylamide flocculants have problems such as weak interaction between the polymer and oil droplets, non-concentrated charge distribution, small molecular weight, poor water solubility, and poor extrusion effect of "interstitial water".

Method used

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  • A kind of flocculant with network interpenetrating structure and preparation method thereof

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preparation example Construction

[0017] In a first aspect, the present invention provides a method for preparing a flocculant with an interpenetrating network structure, wherein the method comprises the following steps:

[0018] (1) Preparation of nano-sol

[0019] Mix ferric chloride, aluminum chloride and the first part of water, then dropwise add lye; raise the temperature of the system to the reaction temperature, then react for 3-5 hours (for example, 4 hours) while stirring; add the second part of water Dilute and then ripen for 18-30 hours (for example, 21, 24 or 27 hours) to obtain a nano-sol;

[0020] (2) Synthesis of flocculant

[0021] Dissolve acrylamide, temperature responsive monomer, pH responsive monomer, stabilizer, structure regulator and dispersant in the nano-sol prepared in step (1); adjust the system temperature to 10-12°C (eg 11°C ) and transferred to the reaction kettle, nitrogen deoxygenation for 50-70 minutes (for example, 60 minutes); adding the amount of initiator to initiate the...

Embodiment 1

[0033] This embodiment prepares a flocculant with a network interpenetrating structure, and the preparation method includes the following steps:

[0034] (1) Nano-sol preparation:

[0035] Mix 1 part of ferric chloride, 6 parts of aluminum chloride and 100 parts of water, add 7 parts by weight of 50% sodium hydroxide solution dropwise to the system, raise the temperature of the system to 75 ° C, and stir at 1000 rpm Then react for 4 hours, then add 550 parts of water to dilute, and ripen for 24 hours for later use.

[0036] (2) Synthesis of flocculant:

[0037] Add 120 parts of acrylamide, 80 parts of N,N-dimethylacrylamide (temperature-responsive monomer), 5 parts of N,N-dimethylallyl octadecyl to the nano-sol prepared in step (1) Ammonium chloride (pH response monomer), 10 parts of PEG4000 (stabilizer), 0.005 parts of N,N-methylenebisacrylamide (structure modifier) ​​and 5 parts of AEO-9 (dispersant), after fully dissolved, Control the temperature of the system within the...

Embodiment 2

[0039] In this embodiment, a flocculant with a network interpenetrating structure is prepared, and the preparation method includes the following steps:

[0040] (1) Nano-sol preparation:

[0041] Mix 2 parts of ferric chloride, 10 parts of aluminum chloride and 140 parts of water, add 10 parts by weight of 50% sodium hydroxide solution dropwise to the system, raise the temperature of the system to 80°C, and stir at 1500 rpm React for 4 hours, then add 600 parts of water to dilute, and ripen for 24 hours for later use.

[0042] (2) Synthesis of flocculant:

[0043] Add 140 parts of acrylamide, 100 parts of N,N-diethylacrylamide (temperature responsive monomer), 10 parts of hexadecyldimethylallyl ammonium chloride ( pH response monomer), 15 parts of PVP K90 (stabilizer), 0.01 part of pentaerythritol triallyl ether (structure regulator) and 10 parts of lauryl amidopropyl sulfobetaine (dispersant), after fully dissolved, the Adjust the temperature of the system to 10-12°C, tran...

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Abstract

The invention relates to a flocculant with a network interpenetrating structure and a preparation method thereof, belonging to the technical field of sewage treatment. The method comprises the following steps: (1) react after mixing ferric chloride, aluminum chloride and water, obtain nano sol after diluting and curing; (2) mix acrylamide, temperature responsive monomer, pH responsive monomer, stable Dissolve the agent, structure modifier and dispersant in the nano-sol, adjust the temperature to 10-12°C, blow nitrogen to remove oxygen, add initiator to initiate polymerization reaction, and obtain the flocculant. The present invention also relates to the flocculant prepared by the method, which has interpenetrating micro-cross network structure, association network structure and organic-inorganic hybrid network structure, which effectively enhances the collection of polymers, The flocculation and sedimentation effect also has temperature and pH response characteristics, which can significantly reduce the moisture content of sludge.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, especially oily sewage produced in the petroleum industry, and specifically relates to a flocculant with a network interpenetrating structure and a preparation method thereof, wherein acrylamide monomer is used as a raw material to prepare the flocculant. Background technique [0002] With the rapid development of the petroleum industry, a large amount of oily sewage is produced in the process of crude oil extraction, storage and transportation, and refining. If it is not discharged after effective treatment, it will cause great harm to the natural environment. During the process, a large amount of oily and watery sludge will be produced. [0003] At the same time, as the treatment rate of urban sewage and industrial wastewater increases year by year, a large amount of sludge will be produced in the process of sewage and wastewater treatment. If the sludge is not disposed of properly, i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/56C02F1/52C08F220/56C08F220/54C08F226/02C08F222/38
CPCC02F1/56C02F1/5236C02F1/5245C08F220/56C08F220/54C08F226/02C08F222/385
Inventor 荣敏杰孙建波许永升于庆华荣帅帅
Owner SHANDONG NUOER BIOLOGICAL TECH
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