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-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 of A Spherical Cellulose Adsorbent as Amino Acid Sorbent

2011 ◽  
Vol 197-198 ◽  
pp. 899-905 ◽  
Author(s):  
Chun Xiang Lin ◽  
Ming Hua Liu ◽  
Huai Yu Zhan
Keyword(s):  
Amino Acids ◽  
Amino Acid ◽  
Reaction Time ◽  
Acrylic Acid ◽  
Reaction Temperature ◽  
Monomer Concentration ◽  
Initiator Concentration ◽  
Basic Amino Acids ◽  
Cellulose Adsorbent

The spherical cellulose adsorbent was prepared by grafting acrylic acid onto the spherical cellulose beads prepared by NMMO method. The effecting factors, e.g., monomer concentration, initiator concentration, reaction temperature and reaction time were optimized by the orthogonal and signal-factor experiments and the structure of the adsorbent was characterized by FTIR and SEM. The graft mechanism was also discussed. Moreover, the spherical cellulose adsorbents were shown to behave as good sorbents for basic amino acids L-Arg, L-Lys and L-His.

scholarly journals Synthesis, Characterization, and Flocculation Properties of Branched Cationic Polyacrylamide

2013 ◽  
Vol 2013 ◽  
pp. 1-10 ◽  
Author(s):  
Weimin Sun ◽  
Guangcheng Zhang ◽  
Ling Pan ◽  
Helin Li ◽  
Aihua Shi
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Orthogonal Experiment ◽  
Monomer Concentration ◽  
Water Soluble ◽  
The Self ◽  
Solution Polymerization ◽  
Mass Ratio ◽  
Initiator Concentration ◽  
Single Factor ◽  
Cationic Polyacrylamide

A water soluble branched cationic polyacrylamide (BCPAM) was synthesized using solution polymerization. The polymerization was initiated using potassium diperiodatocuprate, K5[Cu(HIO6)2](Cu(III)), initiating the self-condensing vinyl copolymerization of acrylamide and acryloxyethyltrimethyl ammonium chloride (DAC) monomer. The resulting copolymer was characterized by the use of Fourier-transform infrared (FTIR) spectroscopy and nuclear magnetic resonance (NMR) spectroscopy. Its flocculation properties were evaluated with standard jar tests of sewage. The effects of initiator concentration, monomer concentration, reaction temperature, and the mass ratio of monomers on intrinsic viscosity and flocculation properties of the product were determined using single-factor experiments and orthogonal experiment.

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.

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).

Effects of Polymerization Parameters on Aqueous Deposited Copolymerization of Acrylonitrile and Itaconic Acid

2013 ◽  
Vol 774-776 ◽  
pp. 508-511
Author(s):  
Ya Qi Zhao ◽  
Qiao Feng ◽  
Ling Zhi Du
Keyword(s):  
Molecular Weight ◽  
Reaction Time ◽  
High Molecular Weight ◽  
Reaction Temperature ◽  
Itaconic Acid ◽  
Temperature Region ◽  
Monomer Concentration ◽  
Initiator Concentration ◽  
Molecular Weights ◽  
Total Monomer Concentration

Pure powdery high molecular weight polyacrylonitrile (HMW-PAN) copolymers were firstly synthesized by aqueous deposited polymerization (ADP) technique employing 2,2'-Azobis (isobutyramidine) dihydrochloride (AIBA) as initiator and itaconic acid (IA) as comonomer. Various PAN polymers were obtained through changing different polymerization parameters. It is indicated that with the increase of total monomer concentration, initiator concentration, reaction temperature and reaction time, polymerization conversions of PAN copolymers all increased. While the molecular weights become greater with the increase of total monomer concentration. With the increase of initiator concentration and reaction temperature (under higher reaction temperature region), the molecular weights decreased. However, the molecular weights only had very little decrease at the end of long extension of reaction time.

scholarly journals PENGARUH JENIS PELARUT DAN TEMPERATUR REAKSI PADA SINTESIS SURFAKTAN DARI ASAM OLEAT DAN n-METIL GLUKAMINA DENGAN KATALIS KIMIA

2015 ◽  
Vol 4 (1) ◽  
pp. 25-29 ◽  
Author(s):  
Jojor Rohana Oppusunggu ◽  
Vinta Rutliana Siregar ◽  
Zuhrina Masyithah
Keyword(s):  
Surface Tension ◽  
Reaction Time ◽  
Reaction Temperature ◽  
Solvent Ratio ◽  
Hydrophilic Group ◽  
Hydrophilic Lipophilic Balance ◽  
Amidation Reaction ◽  
Ir Spectrophotometry ◽  
Ft Ir ◽  
Substrate Ratio

Surfactants are molecules that also has a hydrophilic group and a lipophilic group that can unify a mixture consisting of water and oil. Alkanolamide is one type of nonionic surfactants are widely used in everyday life. In this study, will be observed the influence of the type of solvent and reaction temperature on the synthesis of surfactant alkanolamide n -methyl glukamine and oleic acid from palm oil with sodium methoxide catalyst. This study aims to determine the value of the hydrophilic lipophilic balance (HLB), pH and surface tension of surfactant, by observing the effect of the type of solvent and reaction temperature. This research was conducted by using a flask at 90 ° C, 110 ° C, 130 ° C for 3 hours reaction time, substrate ratio of 1: 2, the stirring speed of 150 rpm and a catalyst concentration of 0.4% (w/w). In the amidation reaction samples taken from the flask every 1 hour for 3 hours and then the results of this amidation reaction was washed with acetone solvent to separate the catalyst. Results washing then purified by heating at 90°C to evaporate the solvent surfactant products hexane and butanol. Results containing surfactant in the analysis with Hydrophilic Liphophilic Balance Method, surface tension and FT-IR spectrophotometry. Based on this research, the optimal conditions at a temperature of 110oC, reaction time 3 hours at the solvent ratio 2: 1. From the analysis of surfactant oleoil n-Methyl glukamine values obtained HLB in the range of 11,53 HLB in accordance with the standard detergent.

Synthesis and Performance Study of Polybasic Starch Graft Copolymerization Function Materials

2009 ◽  
Vol 79-82 ◽  
pp. 43-46 ◽  
Author(s):  
Yan Bo Wu ◽  
Cheng Fei Lv ◽  
Mei Na Han
Keyword(s):  
Reaction Time ◽  
Vinyl Acetate ◽  
Reaction Temperature ◽  
Butyl Acrylate ◽  
Corn Starch ◽  
Graft Copolymerization ◽  
Wood Adhesive ◽  
National Standard ◽  
Polymerization Reaction ◽  
Initiator Concentration

The graft copolymerization of mixed grafting monomers vinyl acetate and butyl acrylate onto grafting skeleton of corn starch have been investigated using ammonium persulfate as initiator. Starch based wood adhesive prepared by in emulsion synthesis have green material, superior property, low cost. The effects of various factors on the graft copolymerization were studied such as reaction time, reaction temperature, initiator concentration as well as match of mixed monomers. By single-factor tests, the optimum graft copolymerization conditions with higher grafting efficiency and grafting percent ratio correspond to the reaction time of 3h, the graft polymerization reaction temperature of about 65°C, the initiator concentration of 9.7×10-3mol/L, the mixed grafting monomers concentration of 1.0 mol/L, the volume ratio of vinyl acetate to butyl acrylate of 5:5. The starch graft copolymer after purification was characterized, and its properties were determined. IR spectra of graft copolymers indicated that the carbonyl group characteristic absorption peak existed at 1730～1740cm-1 besides that of starch. The XRD pattern showed there were several dispersion peaks, therefore the graft copolymerization was the concomitant structure of a little crystalline state and amorphous state. TG and DTA curves confirmed the occurrence of graft copolymerization, and showed that the thermal stability of starch copolymer was better than that of pure corn starch. Starch based wood adhesive is white or cream white emulsion paste, excellent emulsive properties and high temperature stability. All properties of starch based wood adhesive can meet the national standard HG/T2727 - 95 of polyvinyl acetate wood adhesive, and the compressive shear strength outdistances the national standard especially.

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