Hydrolysis of cationic polyacrylamide and its effect
Hydrolysis of Cationic Polyacrylamide and its Effect on Flocculation of Ground Calcium Carbonate. Dongil Seo, Kyudeok Oh, Wanhee Im, and Hak Lae Lee * Cationic polyacrylamides (C-PAMs) have been widely used as flocculating agents to aggregate particles carrying negatively charged surfaces.
1 Title: Transfer and degradation of polyacrylamide based flocculants in hydrosystems: a review 2 3 Authors: A. G. Guezennec1, C. Michel1, K.Bru1, S. Touze1, N. Desroche2, I. Mnif3, M. Motelica-Heino4 4 1 BRGM 5 2 Nexidia SAS, 15 Rue de Mayence 21000 DIJON France 36 Université de Nice 7 4 ISTO, UMR 7327 CNRS-Université d’Orléans, 1A rue de la Férollerie, 45071 Orléans cedex 2
Hydrolysis of polyacrylamide and acrylic acid-acrylamide
The hydrolysis of acrylamide-acrylic acid copolymers has been studied as a function of pH and of the initial composition of the samples. Our experimental results confirm the intramolecular catalysis by neighbouring undissociated carboxylate groups for 3 < pH < 5, as already demonstrated by Smets et al., and the catalysis of OH − ions with autoretarded kinetics for pH > 11.
High molecular weight (106–3 × 107 Da) polyacrylamide (PAM) is commonly used as a flocculant in water and wastewater treatment, as a soil conditioner, and as a viscosity modifier and friction
Polyacrylamide and its derivatives for oil recovery
POLYACRYLAMIDE AND ITS DERIVATIVES FOR OIL RECOVERY By Zun Chen A DISSERTATION Presented to the Faculty of the Graduate School of the MISSOURI UNIVERSITY OF SCIENCE AND TECHNOLOGY In Partial Fulfillment of the Requirements for the Degree DOCTOR OF PHILOSOPHY In CHEMISTRY 2016 Approved by Dr. Thomas P. Schuman, Advisor Dr. Baojun Bai, Co-advisor
The stability mechanism and thermal properties of the system alumina–anionic polyacrylamide (PAM) was studied. The polymer’s adsorption properties in dependence on the following parameters solution pH (in the range 3–9), temperature (in the range 15–35 °C), and carboxyl groups’ content in the PAM chains (in the range 5–30 %) were examined.
Synthesis and Characterization of Acrylamide-Based Anionic
The copolymer of acrylamide (AM) and 2-acrylamido-2-methyl-1-propane sulfonic acid (AMPS) was synthesized through radical solution polymerization by potassium persulfate as initiator. By changing the AMPS feed ratio from 10 to 70%, and keeping other reaction conditions constant, different copolymers were synthesized. The techniques of Fourier transform infrared (FTIR) and nuclear magnetic
The stability mechanism and thermal properties of the system alumina–anionic polyacrylamide (PAM) was studied. The polymer’s adsorption properties in dependence on the following parameters solution pH (in the range 3–9), temperature (in the range 15–35 °C), and carboxyl groups’ content in the PAM chains (in the range 5–30 %) were examined.
CONTRIBUTION TO THE ADSORPTION MECHANISM OF ACETAMIDE
OF ACETAMIDE AND POLYACRYLAMIDE ON TO CLAYS TT~. STUTZMANN and B. SIFFERT Centre de Recherches sur la Physico-Chimie des Surfaces Solides, 24, Avenue du President Kennedy, 68200 Mulhouse, France (Received 26 January 1977; and in final form 15 May 1977)
Acrylamide is a colorless, odorless, crystalline amide that polymerizes rapidly and can form as a byproduct during the heating of starch-rich foods to high temperatures.Acrylamide is used in the production of polymers mainly in the water treatment industry, pulp and paper industry and textile treatment industry and is used as a laboratory reagent. . The polymer is nontoxic, but exposure to the
THE ACTIVITY AND CHARACTERIZATION OF ACID PHOSPHATASES IN
cultures but its activity was highest in the endophyte of E. hispidula. The wall- and membrane-bound acid phosphatase was the dominant fraction in the European endophytes. The extracellular acid phosphatase of high P-fed (323 mM P) mycelia of the endophyte of E. hispidula had the
N-AMINOETHYL POLYACRYLAMIDE AS SUPPORT FOR SOLID-PHASE France Received 1 April 1976 Original figures received 10 May 1976 1. Introduction The automatic sequencing of proteins starting from N-terminus by solid-phase technique should be performed following the same principles as for pep- mined by amino analysis after acid hydrolysis.
