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2015-11-1 · Water-soluble polyacrylamide (PAM) and partially hydrolyzed polyacrylamide (HPAM) polymers are among the most commonly used chemicals in oilfield applications. In polymer-augmented water-flooding Enhanced Oil Recovery (EOR) processes, HPAM polymers are often used as mobility-control agents to increase the viscosity of stimulation fluids in order to improve the sweep efficiency [1] …
Get Price2019-12-1 · In this paper, a statistical analysis on the thermal gelation of well characterized reactants namely partially hydrolysed polyacrylamide (PHPA) (Mw = 5.1 million Daltons and hydrolysis degree = 6%) and polyethylenimine (PEI) (Mw = 19.2 kilo Daltons and branching degree = 59%), was conducted using response surface methodology (RSM).
Get Price1991-10-1 · Effect of the degree of hydrolysis of polyacrylamide on its interactions with poly (ethylene oxide) and poly (vinylpyrrolidone) Article Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to ...
Get Price2004-11-12 · Figure 2.2 Acidic hydrolysis of polyacrylamide 9 Figure 2.3 Alkaline hydrolysis of polyacrylamide 9 Figure 3.1 Diagram of the experiment design 21 Figure 4.1 Decrease in permanganate residual after oxidation of 10 mg/L Clarifloc C-3280 (KMnO 4 dose at 6 mg/L) 35
Get Price2018-9-7 · The hydrolyzed form of polyacrylamide (HPAM), a co-polymer of acrylamide and acrylic acid, is the most widely used anionic PAM in oil and gas development as well as …
Get Price2013-7-27 · By controlling the hydrolysis time, a series of hydrolyzed polyacrylamide grafted carboxymethyl cellulose (CMC-g-HPAM) with different degree of hydrolysis (DH) was obtained. The structure and solution properties of the final copolymers were characterized by Fourier transform infrared (FTIR), 1 H nuclear magnetic resonance ( 1 H NMR) spectra, zeta potential (ZP) and elemental …
Get Price2006-11-22 · The present work is concerned with experimental results of rheological characteristics of polyacrylamide (PAM) and of partially hydrolyzed polyacrylamide (HPAM) (degree of hydrolysis up to 80%) in aqueous and aqueous/sodium chloride solutions with changing experimental conditions such as polymer concentration, temperature, solvent quality, and shear rate applied.
Get PriceReport No. 99 ACRYLAMIDE AND POLYACRYLAMIDE by YEN-CHEN YEN e June 1976 a A private report by the PROCESS ECONOMICS PROGRAM l STANFORD RESEARCH INSTITUTE
Get Price2021-7-13 · 34 polymers composed of polyacrylamide (PAM) (Taylor et al., 2002). PAM is a polymer with high 35 molecular weight, synthetized from acrylamide (AMD) and acrylic acid/acrylate (AA) (Scott et al., 1996; 36 Caulfield et al., 2002). The use of flocculants enables to …
Get Price2006-11-22 · The present work is concerned with experimental results of rheological characteristics of polyacrylamide (PAM) and of partially hydrolyzed polyacrylamide (HPAM) (degree of hydrolysis up to 80%) in aqueous and aqueous/sodium chloride solutions with changing experimental conditions such as polymer concentration, temperature, solvent quality, and shear rate applied.
Get Price2020-9-7 · Hydrolysis-induced large swelling of polyacrylamide hydrogels. Polyacrylamide (PAAm) hydrogels are widely used and studied. Their feature of hydrolysis is often ignored. When PAAm hydrogels are stored under alkaline conditions, they can undergo a hydrolysis reaction, which changes them from neutral hydrogels to polyelectrolyte hydrogels ...
Get Price2013-7-27 · In this present work, a series of hydrolyzed polyacrylamide grafted carboxymethyl cellulose (CMC-g-HPAM) was prepared. The structure and solution properties of CMC-g-HPAM were characterized by FTIR, 1H-NMR, elemental analysis and zeta potential measurements. The graft copolymers were applied as flocculants to remove methylene blue (MB), a cationic dye, from aqueous solutions.
Get PriceThis paper concerns one class of polymers that apparently is being tested widely as an additive for injection water; it is partially hydrolyzed polyacrylamide. The present investigation surveys some ways in which polymer solution properties are affected by polymer molecular weight, rock and fluid properties, polymer molecular weight, rock and ...
Get PriceReport No. 99 ACRYLAMIDE AND POLYACRYLAMIDE by YEN-CHEN YEN e June 1976 a A private report by the PROCESS ECONOMICS PROGRAM l STANFORD RESEARCH INSTITUTE
Get Price2021-2-8 · Polyacrylamide is the collective name for thousands of organic polymer electrolytes with acrylamide as the main component. Cationic polyacrylamide (CPAM) is commonly used for dewatering because sludge particles are usually negatively charged. The efficiency of sludge conditioning depends on CPAM and sludge characteristics.
Get Price2015-7-6 · Polyacrylamide (PAM), a linear water-soluble polymeric compound with a high molecular weight, is widely used in wastewater treatment processes 1,2, papermaking 3, …
Get PriceThe unique formulation of the gel and cassette design enables superior band resolution and significantly improved band evenness. SurePAGE gels are cast in a neutral pH buffer that minimizes polyacrylamide hydrolysis, increases gel stability and minimizes protein modification.
Get Price2019-12-12 · Recently it was found that protein hydrolysis is an important step in the formation of β-lactoglobulin fibrils at pH 2 and elevated temperatures. The objective of the present study was to further investigate the influence of hydrolysis on the kinetics of fibril formation. Both the hydrolysis of β-lactoglobulin and the growth of the fibrils were followed as a function of time and temperature ...
Get PricePolyacrylamide. Linear polyacrylamide is a water-soluble polymer. It is typically non-ionic polymer but due to hydrolysis of some amide groups they could convert into carboxylic groups giving polyacrylamide some weak an ionic properties. Uses of polyacrylamide. One of the largest uses for polyacrylamide is to flocculate solids in a liquid.
Get Price2004-11-12 · Figure 2.2 Acidic hydrolysis of polyacrylamide 9 Figure 2.3 Alkaline hydrolysis of polyacrylamide 9 Figure 3.1 Diagram of the experiment design 21 Figure 4.1 Decrease in permanganate residual after oxidation of 10 mg/L Clarifloc C-3280 (KMnO 4 dose at 6 mg/L) 35
Get Price2020-9-7 · Hydrolysis-induced large swelling of polyacrylamide hydrogels. Polyacrylamide (PAAm) hydrogels are widely used and studied. Their feature of hydrolysis is often ignored. When PAAm hydrogels are stored under alkaline conditions, they can undergo a hydrolysis reaction, which changes them from neutral hydrogels to polyelectrolyte hydrogels ...
Get Price2013-11-4 · PAM undergoes alkaline hydrolysis at high temperatures producing partially hydrolyzed polyacrylamide and ammonia. In this study, the effect of salts on the degree of hydrolysis was investigated. The data obtained from 13 C NMR showed that salts accelerate the degree of hydrolysis of PAM. Ammonium chloride accelerates the degree of hydrolysis ...
Get PricePolyacrylamide Gel-Entrapped Maltase: An Excellent Design of Using Maltase in Continuous Industrial Processes. Nawaz MA(1)(2), Aman A(3), Rehman HU(4), Bibi Z(3), Ansari A(3), Islam Z(5), Khan IA(6), Qader SA(3). ... Bacterial maltase catalyzes the hydrolysis of maltose and is known as one of the most significant hydrolases. It has several ...
Get PriceCationic polyacrylamide copolymers (PAMs): 2018-5-18 · Cationic polyacrylamide copolymers (PAMs) are used for sludge dewatering in municipal waste water treatment and might enter the environment by spreading of the sludge on agricultural land. Concern has been expressed since little is known about the degradation of PAMs in soils.
Get PriceThis paper concerns one class of polymers that apparently is being tested widely as an additive for injection water; it is partially hydrolyzed polyacrylamide. The present investigation surveys some ways in which polymer solution properties are affected by polymer molecular weight, rock and fluid properties, polymer molecular weight, rock and ...
Get PriceImpact of salts on polyacrylamide hydrolysis and gelation: New insights
Get PriceAqueous solutions of partially hydrolyzed polyacrylamide are storable by adjusting and maintaining solution pH from about 3.5 to about 6.8 prior to storage. Storage at a pH above 6.8 or below 3.5 results in hydrolysis. The desired solution pH is achieved by addition of appropriate mineral acids or bases or by the addition of buffer systems with pKa values of about 3.5 to about 6.8.
Get PricePolyacrylamide Handbook - SNF. 2016-8-19 · system. Design of the make-up system is critical and must be made in such a way that there is no possibility of water back-flow from the main water supply into the emulsion piping. Also any other contact between water and emulsion (like rain for example) will generate white stringy lumps.
Get PriceThe hexamine on hydrolysis yields formaldehyde which then combines with hydroquinone and form 2,3,5,6-tetramethylol hydroquinone. Further, partially hydrolyzed polyacrylamide reacts with 2,3,5,6-tetramethylol hydroquinone and forms three dimensional networks of polymer gel, the different steps of which are as follows. Step I.
Get PricePolyacrylamide Gel-Entrapped Maltase: An Excellent Design of Using Maltase in Continuous Industrial Processes. Nawaz MA(1)(2), Aman A(3), Rehman HU(4), Bibi Z(3), Ansari A(3), Islam Z(5), Khan IA(6), Qader SA(3). ... Bacterial maltase catalyzes the hydrolysis of maltose and is known as one of the most significant hydrolases. It has several ...
Get PriceSurface charge and accessible surface area control the retention of polyacrylamide by berea sandstone, baker dolomite, and sodium kaolinite. Hydrolysis of polyacrylamide increases retention by materials with polyacrylamide increases retention by materials with a positively charged surface, such as dolomite, and decreases retention, when surface area remains constant, on materials with ...
Get Price2020-5-25 · Design of Combinatorial Library of Polyacrylamide Hydrogels for Anti-biofouling Here we first sought to investigate the ability of a large library of chemically distinct polyacrylamide copolymer hydrogels to mitigate blood protein and platelet adhesion (Fig. 1a).
Get Price2021-7-8 · Specific features of the hydrolysis of polyacrylamide and its derivatives under various conditions are characterized. The most efficient procedures for performing hydrolysis in dilute and concentrated aqueous solutions and suspensions, as well as during acrylamide polymerization in aqueous solutions and emulsions, are discussed. Get Price
Get PriceDownloadable! The water-soluble polymer PAM (polyacrylamide) is used in enhanced oil recovery (EOR) operations. It is pumped into water injection wells to increase the viscosity of the injected water and in turn to direct more oil towards production wells. This EOR process is proven to be sensitive to operational well conditions such as hydrocarbon reservoir temperature, as well as the ...
Get Price2017-3-8 · By addition of a salt to the eluent, the large increase was observed for the elution volume of the partially hydrolyzed polyacrylamide. This feature was applied to the detection and the separation of the anionic polymers in the technical products of polyacrylamide.
Get Price2020-1-22 · Application of polymer integration technique for enhancing polyacrylamide (PAM) performance in high temperature and high salinity reservoirs Kingsley Godwin Uranta, Sina Rezaei Gomari*, Paul Russell, Faik Hamad School of Science, Engineering and Design…
Get PriceThe flocculation method had a good effect in treating copper tailings, and polyacrylamide (PAM) was commonly used as an effective flocculant. In this paper, a complete set of screening tests was established to effectively evaluate the flocculation performance of PAM used for copper tailings treatment. Firstly, the traditional jar tests were applied and the anionic PAM performed better for ...
Get PriceHydrolysis of polyacrylamide Publisher： PAM editor Release Time： 2020-06-27 20:43:01 Acrylamide products are solid or 50% aqueous solution, and oxygen in the air has obvious inhibitory effect on acrylamide in aqueous solution.
Get PriceAlkaline Hydrolysis of Polyacrylamide and Study on Poly(acrylamide-co-sodium acrylate) Properties. Alkaline Hydrolysis of Polyacrylamide and Study on P(AAn,-Co-NaAc) .Properties appropriate Mw and charge density it can be used as a strong flocculent for waste-water treatment.
Get PriceGlobal Polyacrylamide Gel Electrophoresis . It is assumed that the alkaline condition can cause the hydrolysis of polyacrylamide (PAM) , involving a nucleophilic addition reaction of hydroxide to the amide carbonyl and a subsequent elimination of the amide ion (−NH 2) to yield a carboxyl group (fig. S11A).
Get PricePolyacrylamide is prepared by free radical polymerization mechanism in aqueous solution, using ammonium persulphate as initiator. Poly (acrylamide-co-sodium acrylate) or partially hydrolyzed polyacrylamide (PHPA) with different degrees of hydrolysis was obtained by alkaline hydrolysis of polyacrylamide using sodium hydroxide as hydrolyzing agent.
Get PriceAlkaline Hydrolysis of Polyacrylamide In order to be able to investigate a range of PHPA polymers with an equal degree of polymerization but different levels of ionic groups, polyacrylamide was taken as the parent polymer and subjected to alkaline hydrolysis. Reaction time and amount of added base to the system governed the ratio of the acrylate
Get PriceSTUDY ON THE HYDROLYSIS OF POLYACRYLAMIDE AT HIGH TEMPERATURE AND ITS SELECTION. KONG Bailing (The Research Institute of Exploration and Exploitation, Henan Oilfield) JOURNAL OF SOUTHWEST PETROLEUM INSTITUTE, …
Get PricePolyacrylamide Gel-Entrapped Maltase: An Excellent Design of Using Maltase in Continuous Industrial Processes. (PMID:26847568) Abstract Citations; Related Articles ... Bacterial maltase catalyzes the hydrolysis of maltose and is known as one of the most significant hydrolases. It has several applications in different industrial processes but ...
Get Price2021-6-27 · polyacrylamide pam chemical polymer for water treatment | Buy. Water Treatment Chemical Polyacrylamide PAM Introduction This product adopts the homopolymerization of acrylamide before adding alkali hydrolysis.After granulating,dring,pulverizing,the appearance of the product is white granule powder.The product will be better used in sewage treatment,especially for wastewater from iron and …
Get PricePreparation of Ion-Exchange Membranes by Hydrolysis of Radiation-Grafted Polyethylene-g-Polyacrylamide Membranes Bhuvanesh Gupta,1 Nishat Anjum1,2 1 Department of Textile Technology, Indian Institute of Technology, New Delhi-16, India 2 Department of Applied Chemistry, Delhi College of Engineering, Bawana Road, Delhi, India Received 12 March 2001; accepted 7 January 2003 …
Get PriceFurther study revealed that the hydrolysis of polyacrylamide by alkaline solution significantly increased the viscosity of 1000 ppm solution from 1.5 to 145.40 cP at room temperature, which is comparable to one of the commercial products. ... This result can be applied to the design waste management of biodegradable polymer products.
Get Price2017-3-8 · By addition of a salt to the eluent, the large increase was observed for the elution volume of the partially hydrolyzed polyacrylamide. This feature was applied to the detection and the separation of the anionic polymers in the technical products of polyacrylamide.
Get PricePancreatic lipase has been immobilized onto stainless steel beads by adsorption followed by crosslinking, and onto polyacrylamide by covalent bonding. The activities of the two types of immobilized enzyme toward the particulate substrate, tributyrin emulsion droplets, were determined experimentally, and rate constants based on Michaelis‐Menten kinetics were calculated.
Get Price2020-10-30 · Comparative analysis of rheology of non-crosslinked and crosslinked polyacrylamide with other drilling fluids additives as well as proper mixing procedures are provided. The results achieved in this study are used as a strong tool to design a polymer-based mud with competitive rheological properties which achieved an 80% reduction in fluid loss ...
Get Price2020-10-14 · The viscosity of injection fluid is a critical parameter that should be considered for the design and evaluation of polymer flood, which is an effective and popular technique for enhanced oil recovery (EOR). It is known that the shear-thinning behavior of EOR polymer solutions is affected by temperature.
Get Price2015-5-6 · Enzymatic hydrolysis of Bambara bean protein concentrate was investigated with the view to produce hydrolysates with desirable functional properties. A Box–Behnken design was used for experiments and models capable of predicting functional properties depending on hydrolysis …
Get Priceglucoamylase hydrolysis, the optimum value of temperature, time and pH were found to be 74 oC, pH 5.5 and time 1.5 h. The maximum reducing sugar production at optimum condition was 257 g/l representing 73.43 % conversion or 73.43 dextrose equivalent (DE). Key words: cassava starch, hydrolysis, factorial design, glucose syrup, dextrose ...
Get PriceHenan Runquan Purification Material Co., Ltd has one chemical polyacrylamide production line with the annual output of 10000 tons; Two front hydrolysis polyacrylamide production lines with the annual output of 3000 tons of anionic, 1000 tons of cationic and 500 tons of nonionic separately; it also has a polyaluminium chloride oil furnace drying ...
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