Preparation of Cationic Polyacrylamide-Grafted Starch Flocculant and its Application in the Treatment of Coal Slurry Wastewater

2012 ◽  
Vol 466-467 ◽  
pp. 485-489 ◽  
Author(s):  
Ming Gao ◽  
Zhi Qiang Xu
Keyword(s):  
Reaction Temperature ◽  
Corn Starch ◽  
Monomer Concentration ◽  
Coal Slurry ◽  
Trimethylammonium Chloride ◽  
Optimal Conditions ◽  
Cationic Polyacrylamide ◽  
Cationic Monomer ◽  
Substrate Ratio ◽  
Additional Dosage

A cationic polyacrylamide-grafted starch (St-g-CPAM) flocculant for the coal slurry wastewater, was prepared by using corn starch and acrylamide (AM) as monomers, ethylene methyl propenoyl trimethylammonium chloride (DMC) as cationic monomer through solution polymerization. The effects of initiator concentration, reaction temperature, and monomer concentration on percentage of grafting and the grafting efficiency were investigated. The results show that the optimal conditions of the polymerization are as follows: the monomer to substrate ratio of 2.5, AM:DMC ratio of 2:1, potassium persulfate of 3×10-3 mol/L, reaction time of 4h, the reaction temperature of 50°C. The additional dosage of St-g-CPAM is varying between 20 and 30 mg/L to obtain good flocculation capability

Preparation and Application of Polyacrylamide-Grafted Starch Flocculant

2014 ◽  
Vol 875-877 ◽  
pp. 44-48 ◽  
Author(s):  
Ming Gao ◽  
Zhi Qiang Xu
Keyword(s):  
Reaction Temperature ◽  
Corn Starch ◽  
Monomer Concentration ◽  
Coal Slurry ◽  
Solution Polymerization ◽  
Optimal Conditions ◽  
Initiator Concentration ◽  
Ft Ir ◽  
Substrate Ratio ◽  
Additional Dosage

A polyacrylamide-grafted starch (St-g-PAM) flocculant for the coal slurry wastewater, was prepared by using corn starch and acrylamide (AM) as monomers through solution polymerization. The structure of the synthesized St-g-PAM was characterized by FT-IR and TG. The effects of initiator concentration, reaction temperature, and monomer concentration on percentage of grafting and the grafting efficiency were investigated. The results show that the optimal conditions of the polymerization are as follows: the monomer to substrate ratio of 2.5, potassium persulfate of 0.08 g/mL, reaction time of 3h, the reaction temperature of 65°C. The additional dosage of St-g-PAM is varying between 35 and 45 mg/L to obtain good flocculation capability, better flocculation capability with the addition of 30mg/L of FeCl3.

Preparation of Anionic Polyacrylamide-Grafted Starch Flocculant and its Application

2013 ◽  
Vol 815 ◽  
pp. 432-436 ◽  
Author(s):  
Ying Juan Sun ◽  
Guo Feng Guo ◽  
Yong Li Yang
Keyword(s):  
Reaction Temperature ◽  
Corn Starch ◽  
Monomer Concentration ◽  
Coal Slurry ◽  
Solution Polymerization ◽  
Optimal Conditions ◽  
Initiator Concentration ◽  
Substrate Ratio ◽  
Additional Dosage ◽  
Anionic Polyacrylamide

An anionic polyacrylamide-grafted starch (St-g-APAM) flocculant for the coal slurry waste water, was prepared by using corn starch and acrylamide (AM) as monomers, acrylic acid (AA) as anionic monomer through solution polymerization. The effects of initiator concentration, reaction temperature, and monomer concentration on percentage of grafting and the grafting efficiency were investigated. The results show that the optimal conditions of the polymerization are as follows: the monomer to substrate ratio of 2.0, AM:AA ratio of 2:1, potassium persulfate of 0.7 x 10-3mol/L, reaction time of 4h, the reaction temperature of 50°C. The additional dosage of St-g-APAM is varying between 10 and 20 mg/L to obtain good flocculation capability.

Preparation of Amphoteric Polyacrylamide-Grafted Starch Flocculant and its Application

2013 ◽  
Vol 815 ◽  
pp. 427-431
Author(s):  
Ying Juan Sun ◽  
Yong Li Yang
Keyword(s):  
Reaction Temperature ◽  
Corn Starch ◽  
Monomer Concentration ◽  
Ammonium Persulfate ◽  
Coal Slurry ◽  
Solution Polymerization ◽  
Optimal Conditions ◽  
Cationic Monomer ◽  
Ft Ir ◽  
Additional Dosage

A polyacrylamide-grafted starch (St-g-AM-DMC-AMPS) flocculant for the coal slurry wastewater was prepared by using corn starch (St), acrylamide (AM), methyl acryloyloxyethy trimethyl ammonium chloride (DMC) as cationic monomer, 2-acrylamido-2-methyl acrylate sulfonic acid (AMPS) as anionic monomer through solution polymerization. The structure of the synthesized St-g-AM-DMC-AMPS was characterized by FT-IR and TG. The effects of initiator concentration, reaction temperature and monomer concentration on percentage of grafting and the grafting efficiency were investigated. The results showed that the optimal conditions of the polymerization are that the ratio of substrate and monomer is 3:7, the radio of ammonium persulfate is 0.15%, reaction time is 4h and reaction temperature is 50°C. The additional dosage of St-g-AM-DMC-AMPS is varying between 12mg/L and 20 mg/L to obtain better flocculation capability than PAM.

Preparation of Cationic Polyacrylamide Flocculant and its Application in the Treatment of Coal Slurry Wastewater

2012 ◽  
Vol 560-561 ◽  
pp. 591-594 ◽  
Author(s):  
Ming Gao ◽  
Yong Li Yang ◽  
Zhi Qiang Xu
Keyword(s):  
Ph Value ◽  
Coal Slurry ◽  
Trimethylammonium Chloride ◽  
Cationic Polyacrylamide ◽  
Cationic Monomer ◽  
Ft Ir

A cationic polyacrylamide flocculant (CPAM) for the coal slurry wastewater, was firstly synthesized using acrylamide and cationic monomer ethylene methyl propenoyl trimethylammonium chloride (DMC). The structure of the synthesized CPAM was characterized by means of FT-IR measurement, and the effects of various factors on flocculation performance were studied. The optimum flocculation can be achieved according to the dosage of flocculant between 2 and 5 mg/L, pH value of 6, temperature of 40°C, and the dosage of DMC in CPAM of 17.5%.

Fabrication and Preparation of Coal-Water Slurry Dispersant with Amphoteric Polycarboxylate

2011 ◽  
Vol 335-336 ◽  
pp. 1257-1261
Author(s):  
Jun Feng Zhu ◽  
Guang Hua Zhang ◽  
Zhuo Miao ◽  
Hao Hao
Keyword(s):  
Aqueous Solution ◽  
Polyethylene Glycol ◽  
Coal Slurry ◽  
Trimethylammonium Chloride ◽  
Water Slurry ◽  
Fine Coal ◽  
Dispersion Agent ◽  
Cationic Monomer ◽  
Coal Water Slurry ◽  
Better Than

Coal-water slurry （CWS）dispersant is a key to prepare fine coal-water slurry. A novel amphoteric polycarboxylic (AmPC) dispersant for CWS was copolymerized in aqueous solution by comonomers methacrylate polyglycol monoester (PA), propylene sulfur sodium (SAS) and cationic comonomer methacryloyloxy ethyl trimethylammonium chloride(DMC).Methacrylate polyglycol monoester was prepared by direct esterifying with methacrylate acid (AA) and polyethylene glycol (PEG) in our laboratory. And then, The molecule structure of amphoteric polycarboxylic dispersant was characterized by FTIR. Besides, the dispersant was applied in Shenfu coal slurry. Through examining properties of the coal slurry, the effects of amount of cationic monomer DMC, the concentration of initiator and reaction temperature on dispersant performance were discussed. The result shows that the viscosity reducing of amphoteric polycarboxylic dispersant is better than the dispersant in stock which hasn’t cationic monomer when the dosage of DMC is 5.0wt%. It has been proved that the amphoteric polycarboxylic dispersion agent is suitable for Shenfu coal slurry. When the dosage of AmPC dispersant is up to 0.5wt%, the highest concentration of coal-slurry can reach 65.4wt%.

Preparation of Cationic Polyacrylamide Nanocomposite by Aqueous Two-Phase Polymerization Method

2013 ◽  
Vol 815 ◽  
pp. 484-489
Author(s):  
Quan Cai Wu ◽  
Shu Li
Keyword(s):  
Aqueous Solutions ◽  
Monomer Concentration ◽  
Reaction Conditions ◽  
Two Phase ◽  
Cationic Polyacrylamide ◽  
Organic Montmorillonite ◽  
Cationic Monomer ◽  
Polymerization System ◽  
Monomer Content ◽  
Polymerization Method

In order to improve the aqueous solutions viscosity and flocculation performance of cationic polyacrylamide, organic montmorillonite was added into polymerization system of polyacrylamide, the cationic polyacrylamide/dimethyl diallyl ammonium chloride/organic montmorillonite (CPAM/DMDAAC/MMT) nanocomposite was prepared by aqueous two-phase polymerization method. The influence of organic montmorillonite content, cationic monomer content, polyethylene glycol concentration, monomer concentration on the intrinsic viscosity of the CPAM/DMDAAC/MMT nanocomposite were discussed. The reaction conditions were optimized by orthogonal test. The chemical component and organic montmorillonite shape of the cationic CPAM/DMDAAC/MMT nanocomposite were analyzed by FTIR and XRD respectively. The results show that CPAM/DMDAAC/MMT nanocomposite with high aqueous solutions viscosity and beyond compare flocculation performance has been obtained by aqueous two-phase polymerization method. The CPAM/DMDAAC/MMT nanocomposite has been used very well as a flocculating agent.

scholarly journals SYNTHESIS AND CHARACTERIZATION OF LAURYL METHACRYLATE – GRAFT - POLYPROPYLENE FIBER

2018 ◽  
Vol 54 (1A) ◽  
pp. 245
Author(s):  
Hoang Thu Ha
Keyword(s):  
Reaction Time ◽  
Reaction Temperature ◽  
Graft Polymerization ◽  
Polypropylene Fiber ◽  
Monomer Concentration ◽  
Synthesis And Characterization ◽  
Optimal Conditions ◽  
Graft Yield ◽  
Scanning Electron

The graft polymerization of lauryl methacrylate (LMA) onto polypropylene fiber (PP) was investigated by using 2,2’-azobisisobutyronitrile (AIBN) as initiator. The grafting was influenced by AIBN concentration, monomer concentration, the reaction time and reaction temperature. On the basis of a detailed investigation of these factor, the optimal conditions for the grafting of LMA onto PP with the said initiator were as follows: [AIBN] = 0.015 mol/l, [LMA] = 1.25 mol/l, reaction time 240 min, reaction temperature 80 oC, in which the graft yield (%GY) of 15.7 % was obtained. Characterization of the polypropylene fiber-graft-lauryl methacrylate was done by Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM).

Study on Graft Modification of Waste Newspaper Pulp Fiber

2011 ◽  
Vol 332-334 ◽  
pp. 1695-1698
Author(s):  
Wen Cai Xu ◽  
Quan Xiao Liu ◽  
Yu Bin Lv
Keyword(s):  
Reaction Time ◽  
Reaction Temperature ◽  
Pulp Fiber ◽  
Optimal Conditions ◽  
Cationic Monomer ◽  
Graft Modification ◽  
Pulp Consistency

It is study that graft modification of waste newspaper pulp fiber. Grafting rate of waste newsprint pulp increases with increasing initiator dosage, DADMAC dosage, reaction temperature and pulp consistency. When those conditions reach a certain value, grafting rate will lower, but the reducing speed is different. The optimal conditions of waste newsprint pulp modification is the initiator dosage is 8%, mole rate of cationic monomer in total monomers is 60%, reaction temperature is 50°C and reaction time is 2h. Grafting rate of waste newsprint pulp is 15.89% under these conditions.

Study on Treatment of Chromium(VI) Wastewater by Cuprous Oxide

2015 ◽  
Vol 713-715 ◽  
pp. 2909-2912
Author(s):  
Bin Zhao ◽  
Li Ke Zou ◽  
Guo Yong Li
Keyword(s):  
Photocatalytic Activity ◽  
Reaction Temperature ◽  
Cuprous Oxide ◽  
Oxide Catalyst ◽  
Removal Rate ◽  
Optimal Conditions ◽  
Chromium Vi

Cuprous oxide catalyst was prepared and applied as photocatalist to treat chromium (VI) in wastewater, and the photocatalytic activity of the cuprous oxide was studied. The optimal conditions for the treatment was as follows: the pH of wastewater was 3, the amount of catalysts was 0.3 g/L, the reaction temperature was 60°C. Under the optimal conditions, the removal rate of chromium (IV) in wastewater reached 50% in the presence of cuprous oxide catalyst.

scholarly journals Salt tolerant acrylamide-based quenched polyampholytes for polymer flooding

2020 ◽  
Vol 100 (4) ◽  
pp. 119-127
Author(s):  
N. Mukhametgazy ◽  
◽  
I.Sh. Gussenov ◽  
A.V. Shakhvorostov ◽  
S.E. Kudaibergenov ◽  
...  
Keyword(s):  
Oil Recovery ◽  
Saline Water ◽  
Core Sample ◽  
Polymer Flooding ◽  
Trimethylammonium Chloride ◽  
Salt Tolerant ◽  
High Salinity Water ◽  
Cationic Monomer ◽  
Aqueous Salt Solutions ◽  
Salinity Water

In our previous papers [1, 2] we considered the behavior of linear and crosslinked polyampholytes based on fully charged anionic monomer — 2-acrylamido-2-methyl-1-propanesulfonic acid sodium salt (AMPS) and cationic monomer — (3-acrylamidopropyl)trimethylammonium chloride (APTAC) in aqueous-salt solutions, swelling and mechanical properties. In the present paper we report the applicability of salt tolerant amphoter-ic terpolymers composed of AMPS, APTAC and acrylamide (AAm) in enhanced oil recovery (EOR). The amphoteric terpolymers of different compositions, particularly [AAm]:[AMPS]:[APTAC] = 50:25:25; 60:20:20; 70:15:15; 80:10:10 and 90:5:5 mol.% were prepared by free-radical polymerization, identified and their viscosifying ability with respect to reservoir saline water (salinity is 163 g⋅L-1) at 60 °C was tested. It was found that due to polyampholytic nature, the AAm-AMPS-APTAC terpolymers exhibited improved viscosifying behavior at high salinity water. As a result, the appropriate salt tolerant sample [AAm]:[AMPS]:[APTAC] = 80:10:10 mol.% was selected for polymer flooding experiments. Polymer flood-ing experiments on high permeable sand pack model demonstrated that only 0.5 % oil was recovered by am-photeric terpolymer. While injection of polyampholyte solution into preliminarily water flooded core sample resulted in the increase of oil recovery up to 4.8–5 %. These results show that under certain conditions the amphoteric terpolymers have a decent oil displacement ability.

Sign in / Sign up

Export Citation Format

Share Document