scholarly journals Magnetite-Containing Sulfonated Polyacrylamide as a Nanocatalyst for the Preparation of Biscoumarins

2017 ◽  
pp. 692-700 ◽  
Author(s):  
Kaveh Parvanak Boroujeni ◽  
Shahla Hadizadeh ◽  
Sodabeh Hasani ◽  
Abdulhamid Fadavi ◽  
Mansooreh Shahrokh
Keyword(s):  
Sulfonated Polyacrylamide

scholarly journals Crosslinked sulfonated polyacrylamide (Cross-PAA-SO3H) tethered to nano-Fe3O4 as a superior catalyst for the synthesis of 1,3-thiazoles

BMC Chemistry ◽  
2019 ◽  
Vol 13 (1) ◽  
Author(s):  
Hossein Shahbazi-Alavi ◽  
Sheida Khojasteh-Khosro ◽  
Javad Safaei-Ghomi ◽  
Maryam Tavazo
Keyword(s):  
Fourier Transform ◽  
Phenacyl Bromide ◽  
Vibrating Sample Magnetometer ◽  
Synthetic Route ◽  
One Pot ◽  
X Ray ◽  
Ft Ir ◽  
Sulfonated Polyacrylamide ◽  
Nano Fe3o4 ◽  
Scanning Electron

Abstract Crosslinked sulfonated polyacrylamide (Cross-PAA-SO3H) attached to nano-Fe3O4 as a superior catalyst has been used for the synthesis of 3-alkyl-4-phenyl-1,3-thiazole-2(3H)-thione derivatives through a three-component reactions of phenacyl bromide or 4-methoxyphenacyl bromide, carbon disulfide and primary amine under reflux condition in ethanol. A proper, atom-economical, straightforward one-pot multicomponent synthetic route for the synthesis of 1,3-thiazoles in good yields has been devised using crosslinked sulfonated polyacrylamide (Cross-PAA-SO3H) tethered to nano-Fe3O4. The catalyst has been characterized by Fourier-transform infrared spectroscopy (FT-IR), scanning electron microscope (SEM), dynamic light scattering (DLS), X-ray powder diffraction (XRD), energy-dispersive X-ray spectroscopy (EDS), thermogravimetric analysis (TGA) and vibrating-sample magnetometer (VSM).

scholarly journals A New Empirical Model for Viscosity of Sulfonated Polyacrylamide Polymers

Polymers ◽  
2019 ◽  
Vol 11 (6) ◽  
pp. 1046 ◽  
Author(s):  
Saeed Akbari ◽  
Syed Mohammad Mahmood ◽  
Hosein Ghaedi ◽  
Sameer Al-Hajri
Keyword(s):  
Polymer Solution ◽  
Oil Recovery ◽  
Empirical Model ◽  
Linear Regression Analysis ◽  
Polymer Concentration ◽  
Polymer Flooding ◽  
Solution Viscosity ◽  
Operational Variables ◽  
Reservoir Conditions ◽  
Sulfonated Polyacrylamide

Copolymers of acrylamide with the sodium salt of 2-acrylamido-2-methylpropane sulfonic acid—known as sulfonated polyacrylamide polymers—had been shown to produce very promising results in the enhancement of oil recovery, particularly in polymer flooding. The aim of this work is to develop an empirical model through the use of a design of experiments (DOE) approach for bulk viscosity of these copolymers as a function of polymer characteristics (i.e., sulfonation degree and molecular weight), oil reservoir conditions (i.e., temperature, formation brine salinity and hardness) and field operational variables (i.e., polymer concentration, shear rate and aging time). The data required for the non-linear regression analysis were generated from 120 planned experimental runs, which had used the Box-Behnken construct from the typical Response Surface Methodology (RSM) design. The data were collected during rheological experiments and the model that was constructed had been proven to be acceptable with the Adjusted R-Squared value of 0.9624. Apart from showing the polymer concentration as being the most important factor in the determination of polymer solution viscosity, the evaluation of the model terms as well as the Sobol sensitivity analysis had also shown a considerable interaction between the process parameters. As such, the proposed viscosity model can be suitably applied to the optimization of the polymer solution properties for the polymer flooding process and the prediction of the rheological data required for polymer flood simulators.

Viscosity and retention of sulfonated polyacrylamide polymers at high temperature

2010 ◽  
Vol 119 (6) ◽  
pp. 3623-3629 ◽  
Author(s):  
Masoud Rashidi ◽  
Anne Marit Blokhus ◽  
Arne Skauge
Keyword(s):  
High Temperature ◽  
Sulfonated Polyacrylamide

Rheological and thermal stability of novel weak gels based on sulfonated polyacrylamide/scleroglucan/chromium triacetate

2016 ◽  
Vol 66 (3) ◽  
pp. 477-484 ◽  
Author(s):  
Ehsan Alvand ◽  
Jamal Aalaie ◽  
Mahmood Hemmati ◽  
Vali Ahmad Sajjadian
Keyword(s):  
Thermal Stability ◽  
Sulfonated Polyacrylamide ◽  
Thermal Stability Of ◽  
Weak Gels

Effect of Process Variable on the Gelation Time of Sulfonated Polyacrylamide Nanocomposite Hydrogel

2014 ◽  
Vol 35 (5) ◽  
pp. 663-671 ◽  
Author(s):  
Mahsa Baghban Salehi ◽  
Mohsen Vafaie Sefti ◽  
Ebrahim Vasheghani-Farahani ◽  
Asefe Mousavi Moghadam
Keyword(s):  
Gelation Time ◽  
Process Variable ◽  
Nanocomposite Hydrogel ◽  
Sulfonated Polyacrylamide

Laboratory Investigation of the Injectivity of Sulfonated Polyacrylamide Solutions into Carbonate Reservoir Rocks

2012 ◽  
Author(s):  
Ming Han ◽  
Xianmin Zhou ◽  
Alhasan B. Fuseni ◽  
Badr H. Al-Zahrani ◽  
Abdulkareem M. AlSofi
Keyword(s):  
Laboratory Investigation ◽  
Carbonate Reservoir ◽  
Reservoir Rocks ◽  
Sulfonated Polyacrylamide
Sign in / Sign up

Export Citation Format

Share Document