Low molecular weight poly(acrylic acid) as a salt scaling inhibitor in oilfield operations

2005 ◽  
Vol 2 (3) ◽  
pp. 212-219 ◽  
Author(s):  
S. Moulay ◽  
M. Boukherissa ◽  
F. Abdoune ◽  
F. Z. Benabdelmoumene
Keyword(s):  
Molecular Weight ◽  
Acrylic Acid ◽  
Low Molecular Weight ◽  
Salt Scaling ◽  
Oilfield Operations ◽  
Poly Acrylic Acid

scholarly journals Effects Of Environmental Factors On The Dispersion Behavior Of Iron Oxide In Aqueous Solutions With Poly Acrylic Acid

2015 ◽  
Vol 60 (2) ◽  
pp. 1561-1564
Author(s):  
E.-H. Lee ◽  
K.-M. Kim ◽  
W.-Y. Maeng ◽  
D.-H. Hur
Keyword(s):  
Molecular Weight ◽  
Acrylic Acid ◽  
High Molecular Weight ◽  
Low Molecular Weight ◽  
Solution Ph ◽  
Molecular Weights ◽  
Aqueous Suspensions ◽  
Magnetite Particles ◽  
The Stability ◽  
Poly Acrylic Acid

Abstract After preparing aqueous suspensions from magnetite particles with a poly-acrylic acid, we investigated the effects of several experimental parameters. We characterized the stability of the suspensions using visual inspection, sedimentation, adsorption, and thermal stability of the dispersant. The dispersion stability is affected by the solution pH, the concentrations of magnetite particles, the molecular weight, the concentration of the dispersants, and the temperature. The stability of the suspensions increased as the concentration of the dispersant and the temperature increased. In terms of the molecular weights of the dispersant, the suspensions with dispersant of low-molecular weight (1800) were more stable than those of high-molecular weight (250000) at room temperature. However, at high temperature the suspensions with high-molecular weight showed stability. The adsorption efficiency of the dispersant was very low. The dispersant of high-molecular weight showed a higher thermal integrity than that of low-molecular weight. From this work, we obtained the optimum conditions for stable aqueous suspensions of magnetite particles.

Polymers containing amino bis(methylene phosphonic acid) groups for scale inhibition

2019 ◽  
Vol 48 (1) ◽  
pp. 73-83 ◽  
Author(s):  
Nesrin Köken
Keyword(s):  
Molecular Weight ◽  
Acrylic Acid ◽  
Phosphonic Acid ◽  
Low Molecular Weight ◽  
Content Type ◽  
Scale Inhibition ◽  
Amine Groups ◽  
Allyl Amine ◽  
Phosphonic Acid Groups ◽  
Poly Acrylic Acid

Purpose The purpose of this paper is to prepare poly[allyl amino bis(methylene phosphonic acid)-ran-acrylic acid]s by two different routes. In the first route, poly(allyl amine-ran-acrylic acid)s were produced by radical copolymerization of a mixture of ally amine and acrylic acid, then converted into poly[allyl amino bis(methylene phosphonic acid)-ran-acrylic acid]s by the Mannich reaction with a mixture of formaldehyde and phosphonic acid. In the second route, allyl amino bis(methylene phosphonic acid) monomer was synthesized and copolymerised with acrylic acid. The aim of this work is to produce low-molecular-weight copolymer with the low amount of nitrogen and phosphorous having better scale inhibiting performance than commercial low-molecular-weight poly(acrylic acid)s. Design/methodology/approach Poly(allyl amine-ran-acrylic acid)s were prepared by radical copolymerisation of a mixture of ally amine and acrylic acid, and the molecular weight of copolymers was regulated by using an effective chain transfer compound and the formed copolymer was reacted with a mixture of formaldehyde and phosphorous acid. Allyl amino bis(methylene phosphonic acid) monomer was prepared and then copolymerised with acrylic acid using radical initiators. Findings Poly[allyl amino bis(methylene phosphonic acid)-ran-acrylic acid] produced with both routes, especially low-molecular weight ones have better anti-scaling performance than low-molecular-weight commercial poly(acrylic acid). Research limitations/implications By using an excess of formaldehyde and phosphonic acid, a limited increase in the conversion of amine groups of poly(allyl amine-ran-acrylic acid) to amino methylene phosphonic acid groups was achieved, so unreacted amine groups were always present in the structure of the final copolymers. Practical implications The low-molecular-weight poly[allyl amino bis(methylene phosphonic acid)-ran-acrylic acid] may be used as a better anti-scaling polymer in industry. Social implications The low-molecular-weight poly[allyl amino bis(methylene phosphonic acid)-ran-acrylic acid] is an alternative polymer for scale inhibition in the water boilers. Originality/value The low-molecular-weight poly[allyl amino bis(methylene phosphonic acid)-ran-acrylic acid] copolymers containing both carboxylic acid and amino bis(methylene phosphonic acid) are more effective anti-scaling additives than poly(acrylic acid)s in water boilers.

Fluorescence Probe Studies of Poly(Acrylic Acid) Interchain Complexation and Chain Rigidity Indyced by High Shear Flow. Influence of Molecular Environment

1991 ◽  
Vol 248 ◽  
Author(s):  
Oh-Kit Kim ◽  
Ling-Siu Choi
Keyword(s):  
Molecular Weight ◽  
Acrylic Acid ◽  
Fluorescence Probe ◽  
Critical Concentration ◽  
Low Molecular Weight ◽  
Chain Rigidity ◽  
Poly Ethylene Oxide ◽  
Rigid Rod ◽  
Poly Ethylene ◽  
Poly Acrylic Acid

AbstractThe mode and strength of poly(acrylic acid), PAA, interchain complexation was strongly influenced by the presence of salts and cationic surfactants. Addition of salts to the shearing PAA solution disrupted the complexation, while modification of the PAA with surfactant enhanced the complexation but only below a critical concentration that depended on the surfactant chain length and pH employed. The chain morphology developed by such interchain complexation of PAA is a rigid rod-like chain cluster. The PAA self-complexation in the presence of poly(ethylene oxide), PEO, is strongly affected by pH and PEO molecular weight. With a high molecular weight PEO, the PAA self-complexation is drastically suppressed, whereas the PAA complexation and thus, the chain rigidity is markedly enhanced in the presence of a low molecular weight PEO, probably due to physical crosslinking of the PEO between the elongated PAA molecules.

Interaction between pentaethylene glycol n-octyl ether and low-molecular-weight poly(acrylic acid)

2004 ◽  
Vol 270 (2) ◽  
pp. 490-495 ◽  
Author(s):  
Gerardino D'Errico ◽  
Donato Ciccarelli ◽  
Ornella Ortona ◽  
Luigi Paduano ◽  
Roberto Sartorio
Keyword(s):  
Molecular Weight ◽  
Acrylic Acid ◽  
Low Molecular Weight ◽  
Octyl Ether ◽  
Pentaethylene Glycol ◽  
Poly Acrylic Acid
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