AOS — An anionic surfactant system: Its manufacture, composition, properties, and potential application

Tuvell, M. E.; Kuehnhanss, G. O.; Heidebrecht, G. D.; Hu, P.; Zielinski, A. D.

doi:10.1007/bf02673393

Cited by 27 publications

(14 citation statements)

References 18 publications

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“…The hydroxyalkane sulfonate and alkene sulfonate standards were synthesized using laboratory hydrolysis procedures as described in a previous paper (4). Controlled sulfonation conditions were used to prepare samples for the location of the disulfonate peaks.…”

Section: Sample and Standard Preparationmentioning

confidence: 99%

High pressure liquid chromatography of alpha olefin sulfonates

Johannessen¹,

DeWitt²,

Smith³

et al. 1983

J Americ Oil Chem Soc

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Alpha olefin sutfonates (AOS) are a complex mixture of the positional isomers of hydroxyalkane sulfonates, alkene sulfonates, and disulfonates. This paper describes a qualitative method for separating these various components by reverse-phase high pressure liquid chromatography. The column utilized was a DuPont Zorbax TMS (4.6 mm • 25 cm) with a water/methanol (25:75, v/v) mobile phase containing sodium nitrate at a concentration of 0.4M. The hydroxyalkane sulfonate and alkene sulfonate peaks were identified using laboratory prepared standards. The disulfonate peaks were located using controlled sulfonation conditions. More work needs to be done to separate an overlap of C16 3-hydroxyalkane sulfonate and C14 2-alkene sulfonate in 1416 AOS. However, if studies are based on single carbon number AOS samples, the overlap of these peaks can be avoided. This method can be utilized as a qualitative tool for the comparison of sulfonation runs, the identification of AOS within a detergent, or the identfication of the olefin type used for sulfonation.

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Section: Sample and Standard Preparationmentioning

confidence: 99%

High pressure liquid chromatography of alpha olefin sulfonates

Johannessen¹,

DeWitt²,

Smith³

et al. 1983

J Americ Oil Chem Soc

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“…The CMC value is affected by various parameters including surfactant type, reservoir temperature and pressure, and salt concentrations. A number of research studies have been conducted to investigate the CMC value and surface tension for AOS at ambient conditions or using N 2 (Tuvell et al 1978;Mannhardt et al 2001;Farajzadeh et al 2008Farajzadeh et al , 2009Dong-Mei 2008;Bian 2012). However, minimal work has been performed in order to verify such characteristics at reservoir conditions.…”

Section: Introductionmentioning

confidence: 99%

Stabilizing CO2-Foam using Nanoparticles

Emrani

Nasr‐El‐Din

2015

All Days

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Foamed fluids have been used for decades to diminish formation damage in nearly all kinds of unconventional reservoirs with a wide range of pressures. Although water-based fluids are widely used in the oil industry as one of the most economic hydraulic fracturing methods, foams are another substitute to fracture water-sensitive reservoirs at which damage to pore throats is caused by swelling clays or fines migration. The mixture of CO 2 and surfactant as a CO 2 -foam not only reduces formation damage by minimizing the quantity of aqueous fluid which enters the formation, but significantly improves sweep efficiency. Even though it is common to utilize surfactants in order to generate and stabilize foams, surfactants tend to degrade at high temperatures and in high salinity environments. Adding nanoparticles can solve the aforesaid problems and can increase foam stability.The choice of surfactant concentration is a critical step in preparing more stable foams. In the present work, using CO 2 /alpha olefin sulfonate (AOS) solution as a new foaming solution is introduced for optimizing surfactant concentration in order to generate a stable CO 2 -foam in unconventional reservoirs. Several experimental studies were conducted to obtain the optimal surfactant concentration using a pendant drop method for CO 2 /solution and CO 2 /nano solution. Moreover, the effects of temperature, pressure, salinity, and surfactant concentration on surface tension and the critical micelle concentration (CMC) value were studied at high pressure and high temperature (HP/HT). In these experiments the temperature ranged from ambient conditions to 302°F, while the pressure increased from atmospheric up to 435 psi. AOS solutions were prepared using different brine concentrations ranging from 1 to 10 wt% of NaCl and different surfactant concentrations from 0 to 1 wt%.Experimental results indicated that the CMC value increases as temperature increased. It also decreased while salt concentration increased. Furthermore, for a given temperature and salinity, the results did not exhibit changes in the CMC value when the pressure increased. The addition of nanoparticles decreases the CMC value.A number of research studies have been conducted to investigate the CMC value and surface tension for AOS at ambient conditions using N 2 . However, minimal work has been performed in order to determine such characteristics at reservoir conditions. The present work will provide a new foaming solution in order to evaluate and optimize surfactant concentrations. The present work will also investigate the effect of mixtures of surfactant and nanoparticles on the formation of stable CO 2 -foam in unconventional reservoirs.

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“…Several works (13)(14)(15) have shown that the CAC of the surfactant decreases with increasing chain length of the alkyl sulfate. Sulfonates have received considerable attention due to their importance in tertiary oil recovery (16) and in other applications such as laundry products, dishwasher liquids, and personal care products (17)(18)(19). Examples of commonly used sulfonates are sodium dodecyl benzene sulfonate (SDBS) and α-olefin sulfonates (AOS).…”

Section: Introductionmentioning

confidence: 99%

“…The literature mostly deals with synthesis mechanisms and the usefulness of AOS in laundry products, dishwasher liquids, and personal care products (17). Commercial AOS consists of mixtures of compounds, prepared from linear α-olefins (CH 3 (CH 2 ) n CH= =CH 2 ).…”

Section: Introductionmentioning

confidence: 99%