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 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 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

Synthesis of Di(Chloroethyl) Phosphite

2013 ◽  
Vol 734-737 ◽  
pp. 2532-2535
Author(s):  
Hong Ying Chu ◽  
Zhi Ran Chen
Keyword(s):  
Reaction Time ◽  
Reaction Temperature ◽  
Phosphorus Trichloride ◽  
Temperature Reaction ◽  
Optimal Conditions ◽  
Orthogonal Method ◽  
Ft Ir

Organic intermediate di (chloroethyl) phosphite was synthesized in this work. The influence of reaction temperature, reaction time and solvent on the yield of product was investigated with orthogonal method. The experiment results show that the optimal conditions were molar ration of 2-chloroethannol / phosphorus trichloride 4.0:1, reaction temperature 65~75 °C, reaction time 4h, solvent 60 mL, and the yield of the product reached 89.5%. The asprepared di (chloroethyl) phosphite samples were further characterized by FT-IR and NMR.

Graft Copolymerization of Soybean Protein Isolate and Methyl Methacrylate

2011 ◽  
Vol 695 ◽  
pp. 33-36
Author(s):  
Yan Lu ◽  
Xue Gang Luo ◽  
Xiao Yan Lin
Keyword(s):  
Methyl Methacrylate ◽  
Soy Protein ◽  
Graft Copolymerization ◽  
Soybean Protein ◽  
Ammonium Persulfate ◽  
Protein Isolate ◽  
Optimal Conditions ◽  
Reaction Conditions ◽  
Soybean Protein Isolate ◽  
Ft Ir

New thermoplastic soy protein isolated (SPI) and methyl methacrylate (MMA) copolymers (T-SPI) were prepared using graft copolymerization and initiated with ammonium persulfate (APS). The reaction conditions such as initiator concentration and temperature on the graft percentage (GP) were investigated. The single factor experimental showed that the optimal conditions of the graft reaction. The products were characterized by means of FT-IR and DSC. The results indicated that the monomer was grafted successfully on SPI and the T-SPI had a glass transition at 122°C, and the most important, the water absorption of materials declined obviously.

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).

Graft Copolymerization of Soybean Protein Isolated and Methyl Acrylate as a New Thermoplastic Material

2011 ◽  
Vol 221 ◽  
pp. 644-648 ◽  
Author(s):  
Yan Lu ◽  
Xue Gang Luo ◽  
Xiao Yan Lin ◽  
Chi Zhang
Keyword(s):  
Soy Protein ◽  
Methyl Acrylate ◽  
Graft Copolymerization ◽  
Soybean Protein ◽  
Ammonium Persulfate ◽  
Optimal Conditions ◽  
Reaction Conditions ◽  
Thermoplastic Material ◽  
Ft Ir ◽  
Urea Aqueous Solution

New thermoplastic soy protein isolated (SPI) and methyl acrylate (MA) copolymers (T-SPI-g-MA) were prepared using graft copolymerization and initiated with ammonium persulfate (APS). The reaction conditions such as initiator concentration and temperature on the graft percentage (GP) were investigated. The single factor experimental showed that the optimal conditions for grafting of 15g SPI were: 4 g initiator of APS, 60 mL monomer of MA and in 250 mL 2M urea aqueous solution at 70 °C for 3 hours. The products were characterized by means of FT-IR and DSC. The results indicated that the monomer was grafted successfully on SPI and the T-SPI-g-MA had a glass transition at 22 °C.

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%.

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.

Sign in / Sign up

Export Citation Format

Share Document