CN101735387A - Preparation method of
The invention discloses a preparation method of anionic polyacrylamide, and the method comprises the following steps: mixing 20-90 percent of acrylamide by weight, 5-70 percent of crylic acid by weight, 5-10 percent of urea by weight and deionized water until the total concentration of the acrylamide and the crylic acid achieves 20 percent to 25 percent, lowering the temperature to 0 DEG C to
Polyacrylamide (IUPAC poly(2-propenamide) or poly(1-carbamoylethylene), abbreviated as PAM) is a polymer (-CH 2 CHCONH 2-) formed from acrylamide subunits. It can be synthesized as a simple linear-chain structure or cross-linked, typically using N,N '-methylenebisacrylamide.In the cross-linked form, the possibility of the monomer being present is reduced even further.
US3929751A
A method of producing non-carboxylated, water-soluble polymers of acrylamide of high molecular weight and high solids (30-60%) comprising polymerizing acrylamide at 10-30*C., a pH of 4.7 - 5.9 and in the presence of a sodium bromate-sodium sulfite catalyst and water, at least one dimension of the reaction media having a thickness of not more than about 3/4 inch, the concentration of said
1. In a process for the preparation of an acrylamide polymer containing hydroxamic groups by reacting an aqueous solution of an acrylamide polymer with a hydroxylamine salt at a mole ratio of hydroxylamine to amide groups in the acrylamide polymer of from about 0.1 to about 2.0, the improvement which comprises conducting the reaction at a pH of at least about 11.0, a temperature ranging from
Controllable Preparation of Polyacrylamide Hydrogel
A thermal-initiated polymerization procedure is described for the controlled preparation of monodispersed polyacrylamide (PAM) hydrogel microspheres. A coaxial microfluidic device was designed to disperse uniform drops (∼500 μm) of acrylamide monomer aqueous solution into n-octane. Using a delay loop immersed into a heat bath, the polymerization is initiated and carried out in separate
This patent describes a process for the secondary and tertiary recovery of oil from an oil-bearing subterranean formation having at least one input well and at least one output well which process includes the preparation of an aqueous solution of a polymer consisting essentially of a partially hydrolyzed polyacrylamide capable of meeting the
Freeze-thaw stable polyacrylamide - Free Patents Online
U.S. Pat. No. 4,022,731 and U.S. Pat. No. 4,022,736 are also directed to freeze-thaw stable, self-inverting, water-in-oil emulsions, wherein the water-soluble polymeric material is a polyacrylamide-based polymer. Neither of these patents suggest the use of the maleic anhydride-octadecene-1 polymer surfactant as a freeze-thaw agent.
O. Adalsteinsson, A.L. Lamotte, R.F. Baddour, C.K. Colton, A. Pollak, and G. M. Whitesides. 1979. “Preparation and Magnetic Filtration of Polyacrylamide Gel Beads
Freeze-thaw stable polyacrylamide emulsions - Exxon
U.S. Pat. No. 4,022,731 and U.S. Pat. No. 4,022,736 are also directed to freeze-thaw stable, self-inverting, water-in-oil emulsions, wherein the water-soluble polymeric material is a polyacrylamide-based polymer. Neither of these patents suggest the use of a substituted succinic anhydride compound as a freeze-thaw agent.
The invention relates to a preparation method of a PAM (Polyacrylamide) enhancement nano-hydroxyapatite biological composite coating, comprising the following steps of firstly, dissolving Ca(NO3)2.4H2O and (NH2)2HPO4 into distilled water and preparing mixed liquor by putting a urea powder into the distilled water and uniformly stirring secondly, filtering upper layer liquid after treating the
Preparation method of single component of high-purity
The invention relates to a preparation method of a single component of high-purity oligomate, comprising the following steps of: separating crude oligomate by using 005*7 cation exchange resin to remove glucose effectively and obtain the oligomate product containing less amount of lactose with the purity above 85% taking the oligomate product as a raw material, separating once by using a
Polyacrylamide gel analysis of oligonucleotides (PCR03 Dec-02) page 3 of 3 Running the gel 1. Pre-run the gel in 1x TBE buffer for 30 min at 200 V (for a minigel). If using a minigel system, fill the outer buffer tank with 1x TBE buffer to approximately one third of the total volume. 2.
- What is the molecular weight of poly aluminum chloride?
- Typically, PAC solutions have a density of between 1.2 and 1.4 g/mL. The molecular weight of poly aluminum chloride varies depending on the degree of polymerization and the concentration of the solution. The average molecular weight of PAC is typically between 30,000 and 150,000 g/mol.
- How much does poly Aluminium chloride cost?
- A: The price of poly aluminium chloride (PAC) can vary depending on various factors such as the location, supplier, and quantity purchased. In general, the price of PAC can range from $200-$400 per metric ton. However, the price may vary depending on the purity and concentration of the PAC product.
- What is poly aluminum chloride?
- Poly aluminum chloride is a polymer of aluminum and chloride ions. The structure of PAC is complex and varies depending on the degree of polymerization and the concentration of the solution. PAC is typically composed of various hydrolysis products, such as Al2 (OH)3Cl and Al2 (OH)5Cl.
- What is the density of poly aluminum chloride?
- The density of poly aluminium chloride varies depending on the concentration of the solution. Typically, PAC solutions have a density of between 1.2 and 1.4 g/mL. The molecular weight of poly aluminum chloride varies depending on the degree of polymerization and the concentration of the solution.
