Novel amphoteric acrylamide polymer flocculant and preparation method thereof

A technology of acrylamide and acrylamide monomers, applied in chemical instruments and methods, flocculation/sedimentation water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problem of long dissolution time, weakened particle adsorption capacity, pH value Sensitivity and other problems, to achieve the effect of significant flocculation effect, short dissolution time and strong adsorption capacity

Active Publication Date: 2020-04-10
JIANGXI SCI & TECH NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, commonly used commercially available and industrially produced anion / cation functional monomers, such as acryloyloxyethyltrimethylammonium chloride (DAC), methacryloyloxyethyltrimethylammonium chloride (DMC) , dimethyl diallyl ammonium chloride (DMDAAC), acrylic acid (AA), 2-acrylamido-2-methylpropanesulfonic acid (AMPS) and sodium allyl sulfonate (SAS), etc., such The functional monomer has a single structure, is sensitive to the pH value of the water quality, has a long dissolution time, and has poor treatment ability for some special water quality sewage
The single-head quaternary ammonium salt cationic group or carboxyl anion group contained in this type of functional monomer exhibits low charge neutralization ability for some complex structures, a large number of positively / negatively charged colloidal particles or suspended liquids on the surface, At the same time, most cationic monomers are randomly distributed in the main chain of polyacrylamide molecules, and the adsorption capacity of particles in sewage is further weakened, resulting in an increase in dosage, a sharp increase in cost, and easy to cause secondary pollution problems

Method used

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  • Novel amphoteric acrylamide polymer flocculant and preparation method thereof
  • Novel amphoteric acrylamide polymer flocculant and preparation method thereof
  • Novel amphoteric acrylamide polymer flocculant and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] 1. AGC 1 The synthesis of includes the following steps:

[0028] (1) Add 0.06mol 1,3-bis(dimethylamino)propan-2-alcohol solution and 50ml chloroform solution in a 150ml single-necked flask, add catalyst 4-dimethylaminopyridine (DMAP), acid-binding agent It is 0.09mol triethylamine solution, under ice bath conditions, the temperature is controlled below 5°C, take 0.09mol acryloyl chloride solution and slowly add it dropwise into the flask from a constant pressure dropping funnel, after the dropwise addition, react at room temperature for 24 hours, and then in 40 The reaction was carried out at ℃ for 48h. After the product was spin-dried by a rotary evaporator, it was recrystallized three times through ether, and the solid triethylamine hydrochloride was removed by suction filtration, and the filtered liquid was rotary evaporated to obtain a yellow liquid 1,3-bis(dimethylamino)propane-2- base acrylate. (2) Take 0.1mol of the product obtained in (1) and place it in a 25...

Embodiment 2

[0037] AGC 2 and AGlu 2 Preparation process is with example 1. The synthesis of novel amphoteric polyacrylamide comprises the following steps:

[0038] (1) The polymer is composed of acrylamide monomer (AM) and AGC 2 and AGlu 2 Prepared by ternary copolymerization, in the mixed aqueous solution configured by monomers, the total mass ratio of monomers is 25%, the molar ratio of AM monomers is 85%, AGC 2 and AGlu 2 The molar ratio between them is 1:4.

[0039] (2) Add 4g of auxiliary methanol, 0.004g of chelating agent ethylenediaminetetraacetic acid (EDTA), and 0.006g of chain transfer agent sodium formate into the system, and continuously feed high-purity nitrogen for 30 minutes to remove dissolved oxygen in water, and the temperature of the system is raised to After 40°C, 0.06 g of initiator azobisisobutylamidine hydrochloride (VA-044) was added to carry out polymerization reaction. After 2 hours of reaction, the temperature of the system was raised to 60°C, and the rea...

Embodiment 3

[0042] AGC 3 and AGlu 3 Preparation process is with example 1.

[0043] The synthesis of novel amphoteric polyacrylamide comprises the following steps:

[0044] (1) The polymer is composed of acrylamide monomer (AM), AGC 3 and AGlu 3 Prepared by ternary copolymerization, in the mixed aqueous solution configured by monomers, the total mass ratio of monomers is 30%, the molar ratio of AM monomers is 90%, AGC 3 and AGlu 3 The molar ratio between them is 1:5.

[0045] (2) Add 4g of auxiliary methanol, 0.004g of chelating agent ethylenediaminetetraacetic acid (EDTA), and 0.006g of chain transfer agent sodium formate into the system, and continuously feed high-purity nitrogen for 30 minutes to remove dissolved oxygen in water, and the temperature of the system is raised to After 40°C, 0.07 g of initiator azobisisobutylamidine hydrochloride (VA-044) was added to carry out polymerization reaction. After 2 hours of reaction, the temperature of the system was raised to 60°C, and t...

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Abstract

The invention discloses a novel amphoteric acrylamide polymer flocculant and a preparation method thereof. The novel amphoteric acrylamide polymer flocculant is prepared by ternary polymerization of acrylamide (AM), biquaternary ammonium type cationic functional monomer (AGCm, m = 1-4) comprising different alkyl tail chains (R = (CH2)x-CH3, x = 0-3) and glutamic acid type anionic monomers (AGlun,n = 1-4) with different side chain lengths (R'= (CH2)y, y = 0-3). The prepared novel copolymer of the double-end quaternary ammonium salt cationic functional monomer (AGCm, m = 1-4), the double-end carboxyl-containing anionic monomer (AGlun, n = 1-4) and acrylamide (AM) is short in dissolving time, novel in structure, energy-saving, environment-friendly, efficient and remarkable in flocculation effect. The flocculant has stronger adsorption capacity for negative suspended colloidal particles and organic substances in sewage, the flocculating effect is more remarkable than that of the traditional cationic polyacrylamide, the product economy is good, and the flocculant can be industrially produced.

Description

technical field [0001] The invention relates to the technical field of water treatment, in particular to the preparation of a novel acrylamide polymer flocculant containing double-head cationic functional monomers and double-head anionic functional monomers. Background technique [0002] Polyacrylamide (PAM) and its derivatives have good water solubility and adsorption and flocculation performance due to the rich amide groups and other charged groups in the structure. Environmentally friendly organic flocculants have been widely used in technical fields such as industrial wastewater purification and sludge dehydration treatment. Compared with traditional inorganic flocculants (such as polyaluminum chloride, ferric chloride, etc.), PAM type flocculants have the advantages of more varieties, complete specifications, less dosage, high efficiency and strong processing capacity. And it can play a better effect when used in conjunction with inorganic flocculants. [0003] Howeve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/56C08F220/34C08F220/58C02F1/56C02F11/147
CPCC02F1/56C08F220/56C02F11/147C08F220/34C08F220/58
Inventor 赵丰张潇吴亚芊张逞刘元元张飞炳王金本杨惠史学峰
Owner JIANGXI SCI & TECH NORMAL UNIV
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