Thermal gelation of partially hydrolysed polyacrylamide
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).
Synthesis and evaluation of partially hydrolysed. Synthesis and evaluation of partially hydrolysed polyacrylamide (PHPA) as viscosifier in water based drilling fluids A Borthakur", S R Dutra Choudhury'" P Sengupta', K V Rao' & M C Nihalani" "Regional Research Laboratory, Jorhat 785 006, India "Oil India Limited, Duliajan, Assam, India Received
Synthesis of partially hydrolyzed polyacrylamide
Synthesis of partially hydrolyzed polyacrylamide and investigation of solution properties (Viscosity Behaviour) Article (PDF Available) in Iranian Polymer Journal 13(6):479-484 路 November 2004
partially hydrolyzed polyacrylamide; intrinsic viscosity; synthesis. ABSTRACT Key Words: Partially hydrolyzed polyacrylamide is widely used in water treatment as an anionic coagulant, in drilling
Synthesis of Hydrogel Nanocomposites Based on Partially
Partially hydrolyzed polyacrylamide (HPAM) with an average molecular weight of 8 脳 10 6 g/mol (hydrolysis degree of 30%) was provided by SNF FLOERGER, with trade name FP3330S. Branched polyethyleneimine (PEI) with an average molecular weight of 25.000 g/mol was purchased from Sigma-Aldrich to work as an organic cross-linker.
Polymer flooding is the most successful chemical method to enhance oil recovery. This technique has achieved large-scale field application in China. Polymer flooding is also being tested in several heavy oil fields. For oil field applications, partially hydrolyzed polyacrylamide (HPAM) is the most widely used polymer. HPAM must maintain high viscosity to achieve good oil recovery.
Synthesis, characterization and evaluation
In this paper the suitability of a graft polymer nanocomposite hydrogel system for enhanced oil recovery was examined using polyacrylamide graft starch/clay nanocomposite (a laboratory synthesized product) and chromium (III) acetate (crosslinker). X-ray diffraction analysis, Fourier transform infrared spectrometry analysis, field-emission scanning electron microscopy and transmission electron
Synthesis and evaluation of partially hydrolysed polyacrylamide (PHPA) as viscosifier in water based drilling fluids: Borthakur, A; Choudhury, S R Dutta; Sengupta, P; Rao, K V; Nihalani, M C: IJCT Vol.04(2) [March 1997] 83-88: Protein removal from salt-laden wastewater by activated carbon: Sekaran, G; Mariappan, M; Raghavan, K V: IJCT Vol.04(2
University of Groningen Synthesis of novel branched
e铿€ect of salt concentration for partially hydrolysed polyacrylamide (HPAM) exists. Therefore, SB-PAMs are more resilient under harsh reservoir conditions, which can make them attractive for EOR applications. 6.1 Introduction Conventional oil extraction techniques, consisting of primary and secondary tech-
Mud chemical PHPA Partially Hydrolyzed Polyacrylamide in Petroleum Additives for Drilling Fluid. PHPA mud - Schlumberger Oilfield Glossary. A class of water muds that use partially-hydrolyzed polyacrylamide (PHPA) as a functional additive, either to control wellbore shales or to extend bentonite clay in a low-solids mud.
Preparation and Performance Evaluation of a Composite
composite crosslinking agent, the partially hydrolysed polyacrylamide showed good gelling properties. The minimum amount of cross-linking agent was 0.1% with high gelling strength; its gelation temperature could be adjusted from 60掳C-120掳C and its gelling time could be controlled between 8h and 48h.
2.2 Synthesis of the graft copolymer by ultrasound-assisted method (SAG-g-PAM) The graft copolymers of sodium alginate and acrylamide were synthesized following previous work on modification of polysaccharide by using ultrasound carried out in our lab [18].One gram of SAG (0.0062 mol of anhydroglucose unit) was dissolved in 40 mL of distilled water, specific concentrations of AM from 6 to 23
- Are polyacrylamide gels hydrolyzed or ionic?
- Nonhydrolyzed, and hence nonionic, polyacrylamide gels are used for electrophoresis media in biotechnology laboratories [ 72, 73 ]. Particulate polyacrylamide gels are useful in horticulture [ 74 ]. Hydrolysis of polyacrylonitrile can yield first polyacrylamide and eventually some acrylic acid groups.
- What is nonionic polyacrylamide?
- Nonionic polyacrylamides represent the smallest group of acrylamide-based polymers, representing about 25% of the total polyacrylamide market. Nonionic polyacrylamide is somewhat misleading since in the manufacture of acrylamide, regardless of the route, some degree of hydrolysis of acrylamide occurs.
- How is ionic polyacrylamide prepared?
- Anionic polyacrylamide can also be prepared by the hydrolysis of nonionic polyacrylamide ( Fig. 34.7 ). The process generally involves the addition of a strong base to a homopolymer of polyacrylamide. This can be done in an aqueous solution, inverse emulsion. Recently, a process to produce dry forms of hydrolyzed polyacrylamide has been developed.
- What type of polyacrylamide is used in oil industry?
- The polyacrylamide use can be anionic, cationic, or nonionic with various ratios of the comonomers used in the case of the anionic and cationic polymers. The anionic polyacrylamides in the oil field industry are designated by the generic name of partially hydrolyzed polyacrylamide (PHPA), although they are in actuality copolymers .
