Results 21 to 30 of about 32,922 (302)

A three stage model for adsorption of nonionic surfactants [PDF]

open access: yes, 1993
Copyright @ 1993 American Institute of Physics.A three stage model for the adsorption of nonionic surfactants is proposed which makes use of existing theory from studies of random sequential adsorption.
G. J. Rodgers   +3 more
core   +1 more source

Nonionic polymer surfactants [PDF]

open access: yesJournal of Polymer Science: Polymer Chemistry Edition, 1982
AbstractNonionic water‐soluble polymeric surfactants have been prepared by addition of long‐chain n‐alkyl epoxides to nonionic cellulose ethers. The polymers exhibit properties which can be explained by interchain association. The relationship between hydrocarbon‐modifier carbon number and the onset of association follows a linear relation analogous to
openaire   +1 more source

Novel Nonylphenol Polyethoxylated Based Surfactants for Enhanced Oil Recovery for High-Mineralization Carbonate Reservoir

open access: yesEnergies, 2022
Surfactant flooding can mobilize trapped oil and change the wettability of the rock to be more hydrophilic, which increases the oil recovery factor. However, the selection of surfactants is difficult in the case of high salinity conditions. In this work,
Emil R. Saifullin   +11 more
doaj   +1 more source

Biocatalytic activity of Monascus mycelia depending on physiology and high sensitivity to product concentration

open access: yesAMB Express, 2017
Cell suspension culture using mycelia as whole cell biocatalyst for production of orange Monascus pigments has been carried out successfully in a nonionic surfactant micelle aqueous solution.
Fengling Lu   +3 more
doaj   +1 more source

Ionic behavior assessment of surface-active compounds from corn steep liquor by exchange resins [PDF]

open access: yes, 2016
Depending on their ionic nature, biosurfactants can be classified as nonionic, anionic, cationic, or amphoteric. The ionic behavior of biosurfactants is an important characteristic that dictates their use in industrial applications.
Cruz, J. M.   +4 more
core   +2 more sources

The effect of alkaline–surfactant on the wettability, relative permeability and oil recovery of carbonate reservoir rock: experimental investigation

open access: yesJournal of Petroleum Exploration and Production Technology, 2019
Due to the increasing demand and the price of hydrocarbon fuels, today, cost-effective enhanced recovery of oil and gas reservoirs has become one of the most interesting research topics. Since the Iranian reservoirs have a considerable potential to apply
Erfan Hosseini   +2 more
doaj   +1 more source

The Influence of Bicomponent Mixed Surfactants on Drop/Interface Coalescence [PDF]

open access: yesIranian Journal of Chemistry & Chemical Engineering, 2004
Effects of binary mixtures of ionic/nonionic (sodium dodecyl sulfate/2-heptanol or 1-decanol) and nonionic/nonionic surfactants (2-heptnol/1-decanol) on drop/interface coalescence of water drops in a continuous n-heptane phase were examined.
Parissa Khadiv Parsi   +1 more
doaj  

Crack Reduction during Drying Process by Using Surfactant [PDF]

open access: yesMATEC Web of Conferences, 2019
In this research clay brick samples were made from illitic clays. Surfactant was added to clay mass during formation process to reduce crack generation during drying process.
Guzlena Sandra   +3 more
doaj   +1 more source

Desorption of hydrocarbon chains by association with ionic and nonionic surfactants under flow as a mechanism for enhanced oil recovery

open access: yes, 2017
The need to extract oil from wells where it is embedded on the surfaces of rocks has led to the development of new and improved enhanced oil recovery techniques.
Goicochea, Armando Gama   +2 more
core   +1 more source

Removal of chromium (III) by two-aqueous phases extraction [PDF]

open access: yes, 2009
Two-aqueous phase extraction of chromium (III) as a solute from their aqueous solutions was investigated using polyethoxylated alcohols (CiEj) as a biodegradable non-ionic surfactant in the presence of anionic sodium dodecylbenzene sulfonate (SDBS ...
Amine, Didi Mohamed   +3 more
core   +1 more source

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