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A cationic polyacrylamide dispersion synthesis by ... 2021-7-1 · Abstract. A cationic polyacrylamide (CPAM) dispersion, the copolymer of acrylamide (AM) and acryloyloxyethyltrimethyl ammonium chloride (DAC), has been synthesized through dispersion polymerization in aqueous ammonium sulfate ( (NH4)2SO4) solution.
Get PriceFirst, CS-g-CPAM was polymerized with cationic starch (CS), acrylamide (AM) and diallyl dimethyl ammonium chloride (DMDAAC), and CS-g-CPAM/GO was then synthesized by condensation reaction. The influence factors of graft polymerization were investigated, including total monomer concentration, initiator dosage, monomer mass ratio of m AM : m CS : m DMDAAC , post-polymerization …
Get PriceA 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 …
Get Price2006-3-18 · Polyacrylamide graft molecular weights ranged from 317,000 to 769,000. Absorbencies at pH 7 for saponified graft copolymers prepared with unmodified starches were approximately 200 g/g and approximately 150 g/g for the cationic starches, dextran, and PVOH.
Get PriceDewatering performance of five cationic starch-based polymers with charge densities ranging from 0.38 to 0.94 meq/g and molecular weights ranging from 5 × 104 g/mol to 5 × 105 g/mol were compared with five cationic acrylamide-based polymers with charge densities that ranged from 1 to 3.05 meq/g and molecular weights that ranged from 10 × 106 to 20 × 106/mol.
Get Price2003-5-6 · Abstract. An inverse emulsion of cationic starch‐graft‐polyacrylamide was prepared by inverse emulsion polymerization and a subsequent Mannich reaction. The copolymerization was carried out using potassium persulfate as initiator. The reaction conditions …
Get Price2017-11-1 · A starch–PAM system reduces PAM usage for conventional and ballasted flocculation. • With 0.4 mg starch/L, PAM is reduced by 69% (surface water) and 45% (wastewater). • With the dual system (G: 165-200 s −1), floc resistance is not impacted. • Coaddition of a starch-PAM blend solution could be used to reduce the use of PAM.
Get Price2015-5-25 · Dewatering performance of five cationic starch-based polymers with charge densities ranging from 0.38 to 0.94 meq/g and molecular weights ranging from 5 × 10 4 g/mol to 5 × 10 5 g/mol were compared with five cationic acrylamide-based polymers with charge densities that ranged from 1 to 3.05 meq/g and molecular weights that ranged from 10 × 10 6 to 20 × 10 6 /mol. The cationic polyacrylamides and cationic …
Get Price2012-12-24 · the enhanced oil recovery in cationic starch and successive water flooding was reduced from 15.3% to 5.4% (Table3). The above experimental results show that, with the increase of concentration and injected volume of the cationic starch, this product flooding system after the secondary recovery obtains an ideal result in lab simulation experiments. 3.
Get PriceA 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 …
Get PriceDewatering performance of five cationic starch-based polymers with charge densities ranging from 0.38 to 0.94 meq/g and molecular weights ranging from 5 × 104 g/mol to 5 × 105 g/mol were compared with five cationic acrylamide-based polymers with charge densities that ranged from 1 to 3.05 meq/g and molecular weights that ranged from 10 × 106 ...
Get Price2012-12-24 · modifications based on synthetic polymers (e.g., polyacrylamide) [8,9] and natural polymers (e.g. starch, cellulose, chitin, lignose), respectively. We once prepared a cationic polymer by reaction of 2,3-epoxypropyltrimethylammonium chloride and starch via a dry process and studied its application as a profile control agent in en-
Get Price2015-5-25 · The optimum doses of the cationic starch flocculants were two to four times higher than the cationic polyacrylamide polymers. Additionally, it was found that the cationic starches were more effective in minimising the turbidity of the natural organic soils than the cationic polyacrylamides.
Get Price2006-3-18 · Graft copolymers of polyacrylamide and various substrates were prepared by reactive extrusion in a twin screw extruder using ammonium persulfate as initiator. Substrates included unmodified starches (corn, waxy maize, wheat, and potato), cationic starches, dextrin, dextran, and polyvinyl alcohol (PVOH). The feed ratio of substrate to monomer was 2:1. Average conversion of monomer to polymer ...
Get PriceCross-linked potato starch (StMBA) and starch-g-polyacrylamide materials with a high content of natural polymer from 60 to 90 wt.% (St60–St90) were synthesized by double chemical-chemical modification (grafting and cross-linking). Eco-friendly starch absorbents were tested for removal of Cu2+ and Fe3+ from aqueous solutions. The characteristics of the obtained materials (Fourier transform ...
Get PriceSaponified dextrin Waxy maize starch 380 (5) 1.16 (0.03) graft copolymers, however, were essentially soluble in DI Potato starch 557 (14) 1.64 (0.06) water; the small fraction which remained on the sieve gave Wheat starch 388 (8) 1.52 (0.05) Cationic normal corn starch 390 (21) 1.47 (0.03) an absorbency of 6 g/g. Cationic waxy maize starch 277 ...
Get PriceThe present invention discloses a process for manufacturing a grafted polyacrylamide flocculant of cationic/ampholytic ions, which is characterized by graft-copolymerizing starch or micro-crystalline cellulose as backbone with acrylamide, while using potassium permanganate as initiator, hydrolyzing and thereafter reacting with alkyl-amino-carbinol.
Get Price2012-2-15 · Starch is one of the most abundant natural polymers in the world, and as an important derivative of starch, cationic polyacrylamide-grafted starch (St-g-CPAM) has been widely used in many fields such as paper making, spinning, petroleum well drilling, medicine
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Get PriceA 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 …
Get Pricefor the starch substrates were approximately 25% with grafting efficiencies of about 70%. Polyacrylamide graft molecular weights ranged from 317,000 to 769,000. Absorbencies at pH 7 for saponified graft copolymers prepared with unmodified starches were approximately 200 g/g and approximately 150 g/g for the cationic star-ches, dextran, and PVOH.
Get Price2015-5-25 · The optimum doses of the cationic starch flocculants were two to four times higher than the cationic polyacrylamide polymers. Additionally, it was found that the cationic starches were more effective in minimising the turbidity of the natural organic soils than the cationic polyacrylamides.
Get PriceAbstract: 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 ...
Get PriceThe cationic polyacrylamide CPAM is a linear polymer compound, and since it has various active groups, it can affinity with many substances and adsorb to form hydrogen bonds. Cationic polyacrylamide is mainly a flocculent negatively charged colloid. It has functions such as turbidity removal, decolorization, adsorption and adhesion.
Get Price2012-2-15 · Starch is one of the most abundant natural polymers in the world, and as an important derivative of starch, cationic polyacrylamide-grafted starch (St-g-CPAM) has been widely used in many fields such as paper making, spinning, petroleum well drilling, medicine
Get Price2007-6-7 · The flocculation and dewatering measurements clearly show that the synthetic cationic flocculant PA (0.2 kg/t TS) can be best substituted by cationic starch KS 2 (c = 0.1 kg/t TS, M w = 1.1 e+08). For substitution of PTAC ( c = 0.3 kg t TS ) by cationic starches, we observed that a maximal dewatering efficiency is reached with an approximately ...
Get Price2021-6-3 · Two series of binary graft cationic starch-based flocculants (CS-DMCs and CS-DMLs) with different hydrophilicity and charge density (CD) were prepared …
Get Price2018-6-6 · substances, such as cationic starch,4,5) and cationic polyacrylamide,6) has been shown to decrease the amount of polymer that is adsorbed on cellulose. This is explained by the lower amount needed to compensate for the surface charge and reach charge neutrality.5) The molecular weight of the cationic polymer is another
Get Pricefor the starch substrates were approximately 25% with grafting efficiencies of about 70%. Polyacrylamide graft molecular weights ranged from 317,000 to 769,000. Absorbencies at pH 7 for saponified graft copolymers prepared with unmodified starches were approximately 200 g/g and approximately 150 g/g for the cationic star-ches, dextran, and PVOH.
Get PriceDewatering performance of five cationic starch-based polymers with charge densities ranging from 0.38 to 0.94 meq/g and molecular weights ranging from 5 × 104 g/mol to 5 × 105 g/mol were compared with five cationic acrylamide-based polymers with charge densities that ranged from 1 to 3.05 meq/g and molecular weights that ranged from 10 × 106 ...
Get PriceAbstract Cassava starch- g -polyacrylamide (PAM) was successfully prepared by a reactive batch processing using a specially designed batch reactor resulting in a superabsorbent polymer (SAP) with water absorption of 605 g/g being obtained under the optimized reaction conditions. The occurrence of a graft copolymer was confirmed by FT-IR spectra, where it was found to exhibit all characteristic ...
Get PriceThe starch has a degree of substitution of 0.033. 98% of the cationic starch material is mixed with 2% by weight polyacrylamide polymer of about 5 × 10 6 average molecular weight. EXAMPLE NO. 3 The product of Example No. 2 is added to water and cooked with steam for 20 minutes at 195° F. to gelatinize the starch.
Get PriceH.L. Agro Products Pvt. Ltd. H.L. Agro Products is the leading exporter of sesame seeds, starch & corn derivative products in India. With its fully automated processing plants in Kanpur, it is empowered to produce & deliver the best grade of sesame. Tags: India Food Beverages Suppliers. India.
Get Price2020-11-26 · methacrylate) grafted starch (Starch-g-PMMA) by ATRP [6,7]. Nurmi and coworkers grafted methyl methacrylate (MMA) from starch acetate [8]. Moghaddam and coworkers prepared polyacrylamide grafted carboxymethyl starch (CMS-g-PAA) or polyhydroxyethylacrylate grafted carboxymethyl starch (CMS-g-PHEA) by ATRP [9].
Get PriceUS6033525A US09/176,674 US17667498A US6033525A US 6033525 A US6033525 A US 6033525A US 17667498 A US17667498 A US 17667498A US 6033525 A US6033525 A US 6033525A Authority US United States Prior art keywords starch pam cationic cooking anionic Prior art date 1997-10-30 Legal status (The legal status is an assumption and is not a legal conclusion.
Get Price2018-4-4 · Cationic (positively charged) Non-ionic (no charge) Organic or inorganic •Organic polymers can be: Natural (e.g. starch, rubber, DNA, proteins) Synthetic (e.g. nylon, teflon, PVC, polyacrylamide) Semi-synthetic (e.g. vulcanized rubber, chitosan) What are polymers? • …
Get PriceUS5104487A US07/568,396 US56839690A US5104487A US 5104487 A US5104487 A US 5104487A US 56839690 A US56839690 A US 56839690A US 5104487 A US5104487 A US 5104487A Authority US United States Prior art keywords starch furnish cationic gum cationic starch Prior art date 1988-09-02 Legal status (The legal status is an assumption and is not a legal conclusion.
Get PriceDewatering performance of five cationic starch-based polymers with charge densities ranging from 0.38 to 0.94 meq/g and molecular weights ranging from 5 × 104 g/mol to 5 × 105 g/mol were compared with five cationic acrylamide-based polymers with charge densities that ranged from 1 to 3.05 meq/g and molecular weights that ranged from 10 × 106 ...
Get PriceCationic starch-grafted-cationic polyacrylamide based graphene oxide ternary composite flocculant: Cationic starch-grafted-cationic polyacrylamide based graphene oxide ternary composite flocculant for the enhanced flocculation of oil sludge suspension In this study, a novel, highly efficient and environmentally friendly ternary composites...
Get PriceCATCS showed better flocculation performance than cationic starch and chitosan in 5 g/L kaolin suspension trended to performance well in acidic and alkaline solution. The comparison of the flocculation performance between CATCS, Fe 2 (SO 4) 3 and polyacrylamide polyacrylamide Subject Category: Commodities and Products
Get PriceAbstract Cassava starch- g -polyacrylamide (PAM) was successfully prepared by a reactive batch processing using a specially designed batch reactor resulting in a superabsorbent polymer (SAP) with water absorption of 605 g/g being obtained under the optimized reaction conditions. The occurrence of a graft copolymer was confirmed by FT-IR spectra, where it was found to exhibit all characteristic ...
Get Price2016-6-25 · As it is observed in Fig. 2, first pass retention was increased by adding cationic starch at both levels of 1.8% and 2.4%. However, this increase was more evident at the loading level of 2.4% cationic starch. In addition, with the dual system of cationic starch and nano-silica, even more progress in the first pass retention was observed (Table 2).
Get Price1970-10-1 · The soluble fraction weighed 0.13 g, and its infrared spectrum showed strong absorption due to starch in addit8ion absorption in the carbonyl region. to Flocculation Studies The starch graft copolymers arid the commercial high molecular weight cationic polyacrylamide were dispersed in water by adding 0.2 g of polymer to 150 ml of distilled ...
Get PriceAbstract The flocculation kinetics of kaolin particles suspended in 0.01 mol/L NaCl solution and adsorption properties of cationic starch on kaolin surface have been investigated at pH 5.0. Adsorption kinetics of cationic starch followed pseudo-second-order model (R2 > 0.98). Flocculation kinetics showed that increase in flocculant dosage resulted in higher rate constants for the flocculation ...
Get Price2020-11-26 · methacrylate) grafted starch (Starch-g-PMMA) by ATRP [6,7]. Nurmi and coworkers grafted methyl methacrylate (MMA) from starch acetate [8]. Moghaddam and coworkers prepared polyacrylamide grafted carboxymethyl starch (CMS-g-PAA) or polyhydroxyethylacrylate grafted carboxymethyl starch (CMS-g-PHEA) by ATRP [9].
Get PriceUS5104487A US07/568,396 US56839690A US5104487A US 5104487 A US5104487 A US 5104487A US 56839690 A US56839690 A US 56839690A US 5104487 A US5104487 A US 5104487A Authority US United States Prior art keywords starch furnish cationic gum cationic starch Prior art date 1988-09-02 Legal status (The legal status is an assumption and is not a legal conclusion.
Get Pricecationic polyacrylamide reaction in azerbaijan [PDF] A CATIONIC POLYACRYLAMIDE DISPERSION A cationic polyacrylamide (CPAM) dispersion, the copolymer of acrylamide (AM) and acryloyloxyethyltrimethyl ammonium chloride (DAC), has been synthesized through dispersion polymerization in aqueous ammonium sulfate ((NH4)2SO4) solution.
Get PriceCationic Polyacrylamide-wastewater treatment chemical. 2020-7-3 · Cationic polyacrylamide (CPAM for short) is a linear polymer composed of cationic monomer and acrylamide. Agent has functions of flocculation, decolorization, adsorption, turbidity removal, adhesion, etc. It can be used as a sludge dewatering agent and papermaking aid.
Get PriceCationic polyacrylamide_OKCHEM. 2017-9-15 · Cationic ionic liquids-based surfactants (ILS), such as 4-methyl pyridinium bromide (C n PBr, where n = 4,6,8), were used in preparation of polyacrylamide gels, sample buffer, and running buffer for cationic ILS polyacrylamide gel electrophoresis (ILS-PAGE).
Get PriceCationic starch-grafted-cationic polyacrylamide based graphene oxide ternary composite flocculant: Cationic starch-grafted-cationic polyacrylamide based graphene oxide ternary composite flocculant for the enhanced flocculation of oil sludge suspension In this study, a novel, highly efficient and environmentally friendly ternary composites...
Get Price2007-10-1 · They are commonly added in the form of colloidal particles, stabilized by cationic starch. As an example we studied the deposition of micron-sized Alkyl Ketene Dimer (AKD) particles on pulp fibres by cationic polyacrylamide (cPAM), a common flocculent. AKD is widely used in the production of fine papers, containing calcium carbonate fillers.
Get Price2009-9-5 · Anionic starch-graft-polyacrylamide (S-g-PAM) was prepared by alkaline hydrolysis. The hydrolytic agent (mixture of sodium carbonate and sodium hydroxide) was added to starch-graft-polyacrylamide emulsion, the concentration of the hydrolytic agent was 2.12 mol/L, and the molar ratio of sodium carbonate to sodium hydroxide was 1:1.
Get PricePolyacrylamide Suppliers and Manufacturers in China - According to the ion characteristics, it can be divided into three types: cationic, anionic and nonionic. Fooding is a Polyacrylamide Manufacturers, Suppliers and Wholesalers in China. You can inquiry Polyacrylamide price by email us: [email protected] or leave message on the Fooding web ...
Get Pricehydrolyzed polyacrylamide grafted maize starch . Cassava starch-g-polyacrylamide (PAM) was successfully prepared by a reactive batch processing using a specially designed batch reactor resulting in a superabsorbent polymer (SAP) with water absorption of 605 g/g being obtained under the optimized reaction conditions.The occurrence of a graft copolymer was confirmed by FT-IR spectra, where it ...
Get PriceCationic polyacrylamide is a derivative of polyacrylamide, a cationic polymer flocculant which has an excellent effect on sewage treatment. Our existing cationic polyacrylamide are mostly prepared by the Mannich reaction ,which has the shortcomings of more unreacted material, low cationic degree, poor stability, short validity, etc.
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