Optimal Surfactant Structures for Cosurfactant-Free Microemulston Systems I. C<sub>16</sub>and C<sub>14</sub>Guerbet Alcohol Hydrophobes

Sunwoo, Chunhee; Wade, William H.

doi:10.1080/01932699208943330

Cited by 42 publications

(30 citation statements)

References 30 publications

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“…Some propoxylated Guerbet alcohol sulfates show some of the features of extended surfactants due to their similar molecular structures (64,99).…”

Section: Use Of a Single Species Revisitedmentioning

confidence: 99%

“…With ethoxylated Guerbet alcohol sulfates, an increase in solubilization is attained by decreasing the temperature and either increasing the salinity (for a high degree of ethoxylation) or decreasing it (for a low degree of ethoxylation) (64).…”

Section: Solubilization Enhancement With a Single Amphiphilic Speciesmentioning

confidence: 99%

“…Extended surfactants also have been found to mix well with conventional surfactants, just as the go-through linker does, with a solubilization performance that depends on the amount of extended surfactant, but with a formulation that is adjustable, thanks to the conventional surfactant species (a nice feature for the formulator) (98). Some propoxylated Guerbet alcohol sulfates show some of the features of extended surfactants due to their similar molecular structures (64,99).…”

Section: Use Of a Single Species Revisitedmentioning

confidence: 99%

See 2 more Smart Citations

Enhancing solubilization in microemulsions—State of the art and current trends

Salager

Antón

Sabatini

et al. 2005

J Surfact & Detergents

219

198

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Along a formulation scan, solubilization is maximal when a bicontinuous microemulsion is in equilibrium with both oil and water excess phases in a so-called Winsor III system. The logical way to enhance solubilization is to increase the interaction of the surfactant for both the oil and water phases, which can be easily attained by increasing the size of both the head and tail groups. However, this approach is limited by solubility constraints. Additional solubilization enhancement can be attained by introducing a molecule(s) that bridge the bulk phase and the adsorbed surfactant layer; this can be accomplished by using the so-called lipophilic and hydrophilic "linker effect" or by using block copolymer additives. In either case, the goal is to modify an extended zone in the oil and water domains close to their boundary. The intramolecular grafting of a linker group between the hydrophilic and lipophilic moieties in a surfactant results in a so-called "extended" surfactant structure, which produces enhanced solubilization, as does the surfactant/linker combination, but with the added benefit that the self-contained extended surfactant structure does not undergo selective partitioning. We conclude that an improvement in solubilization is directly related to the presence of a smooth, blurred, and expanded transition across the interfacial region from polar to apolar bulk phases.KEY WORDS: Extended surfactants, future trends, interfacial tension, lipophilic and hydrophilic linkers, microemulsions, solubilization, state of the art.

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“…Some propoxylated Guerbet alcohol sulfates show some of the features of extended surfactants due to their similar molecular structures (64,99).…”

Section: Use Of a Single Species Revisitedmentioning

confidence: 99%

Section: Solubilization Enhancement With a Single Amphiphilic Speciesmentioning

confidence: 99%

Section: Use Of a Single Species Revisitedmentioning

confidence: 99%

See 1 more Smart Citation

Enhancing solubilization in microemulsions—State of the art and current trends

Salager

Antón

Sabatini

et al. 2005

J Surfact & Detergents

219

198

View full text Add to dashboard Cite

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“…Many authors have studied the influence of the amount of salt or cosurfactant on the modification of the macroscopic state of the system (Winsor types I, II, III, IV) [31,32].…”

Section: Effect Of the Butan-1-ol: Surfactant Ratiomentioning

confidence: 99%

Phase behavior of pseudoternary brine/alkane/alcohol-secondary alkanesulfonates systems

Azira

Tazerouti²,

Canselier

2008

J Therm Anal Calorim

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“…Effect of Alkoxy Chains. Sunwoo and Wade (1992) observed that functional properties of an anionic surfactant, which include its hydrophilic-lipophilic balance (HLB) and emulsifying power, are largely influenced by the branch location. The HLB can be shifted greatly by introducing branching.…”

Section: Resultsmentioning

confidence: 99%

Low-Cost, High-Performance Chemicals for Enhanced Oil Recovery

Yang¹,

Britton²,

Liyanage³

et al. 2010

All Days

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The ability to select low-cost, high-performance surfactants for a wide range of crude oils under a wide range of reservoir conditions has improved dramatically in recent years. We have developed surfactant formulations (surfactant, co-surfactant, co-solvent, alkali, polymer, electrolyte) using a refined phase behavior approach. Such formulations nearly always result in more than 90% oil recovery in both outcrop and reservoir cores when good surfactants with good mobility control are used. Chemical flood residual oil saturations are typically less than 0.04 and surfactant retention between 0.01 and 0.1 mg/g with these formulations using as little as 0.2% surfactant concentration and 30% pore volume ASP slugs. We describe some of the advances that have improved the performance, reduced the cost, increased the robustness, and extended the range of reservoir conditions for these formulations. There are thousands of possible combinations of the chemicals that could be tested for each oil and each chemical combination requires many observations over a long time period at reservoir temperature for proper evaluation, so it would take too long, cost too much and in many cases not even be feasible to test all combinations. In practice we use our scientific understanding of how to match up the surfactant/co-surfactant/co-solvent characteristics with the oil characteristics, temperature, salinity, hardness and so forth. We have synthesized and tested new surfactants with much larger hydrophobes and more branching than previously available. We have tested new classes of co-solvents and cosurfactants with superior performance. These new developments have enabled us to develop good formulations for both oils that react with alkali to make soap and oils that do not. We have significantly lowered the chemical cost needed for waxy crudes with very high equivalent alkane carbon numbers. We have good results for oils with API gravities as low as 17, high temperature, high salinity, and high hardness brines. Many of these developments are synergistic and taken together represent a breakthrough in reducing the cost of chemical flooding and thus its commercial potential in both sandstone and carbonate reservoirs. SPE 129978ordered arrays such as gels or liquid crystals and decreases the reliance on alcohols or other co-solvents for rapid equilibration of microemulsions. Branched co-surfactants with different structures than the primary surfactant can be added to disrupt the orderly arrangement of surfactant molecules at interfaces (

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Optimal Surfactant Structures for Cosurfactant-Free Microemulston Systems I. C₁₆and C₁₄Guerbet Alcohol Hydrophobes

Cited by 42 publications

References 30 publications

Enhancing solubilization in microemulsions—State of the art and current trends

Enhancing solubilization in microemulsions—State of the art and current trends

Phase behavior of pseudoternary brine/alkane/alcohol-secondary alkanesulfonates systems

Low-Cost, High-Performance Chemicals for Enhanced Oil Recovery

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Optimal Surfactant Structures for Cosurfactant-Free Microemulston Systems I. C16and C14Guerbet Alcohol Hydrophobes

Cited by 42 publications

References 30 publications

Enhancing solubilization in microemulsions—State of the art and current trends

Enhancing solubilization in microemulsions—State of the art and current trends

Phase behavior of pseudoternary brine/alkane/alcohol-secondary alkanesulfonates systems

Low-Cost, High-Performance Chemicals for Enhanced Oil Recovery

Contact Info

Product

Resources

About

Optimal Surfactant Structures for Cosurfactant-Free Microemulston Systems I. C₁₆and C₁₄Guerbet Alcohol Hydrophobes