Anionic surfactant precipitation in hard water

Noı̈k, Christine; Baviere, M.; Defives, D.

doi:10.1016/0021-9797(87)90006-3

Cited by 30 publications

(20 citation statements)

References 13 publications

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“…Shown in Figure 1 is the effect of high TDS on homogeneous single phase surfactant solution. The presence of monovalent and divalent cations, such as Na + , K + , Ca ++ , and Mg ++ , in the reservoir brine creates an unsuitable environment for the anionic surfactant by inducing surfactant precipitation or a two phase aqueous micellar solution [6,7]. Surfactant precipitation is the most common problem encountered at high TDS conditions.…”

Section: Introductionmentioning

confidence: 99%

Design of an optimal middle phase microemulsion for ultra high saline brine using hydrophilic lipophilic deviation (HLD) method

Budhathoki

Hsu

Lohateeraparp

et al. 2016

Colloids and Surfaces A: Physicochemical and Engineering Aspect

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Section: Introductionmentioning

confidence: 99%

Design of an optimal middle phase microemulsion for ultra high saline brine using hydrophilic lipophilic deviation (HLD) method

Budhathoki

Hsu

Lohateeraparp

et al. 2016

Colloids and Surfaces A: Physicochemical and Engineering Aspect

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“…However, mineral cations, such as Na + , Mg 2+ , and Ca 2+ , can significantly affect the macroscopic properties of surfactants, including surface tension, solubility, aggregation morphology, etc 5 -7 . It potentially causes the precipitation and even ineffectiveness of anionic surfactants in many applications 8,9 . Therefore, it is of great significance to investigating the interaction behaviors between anionic surfactants and cations.…”

Section: Introductionmentioning

confidence: 99%

Density Functional Theory Study of the Interaction between Sodium Dodecylbenzenesulfonate and Mineral Cations

Liu¹,

中国石化胜利油田有限公司地质科学研究院²,

Fan³

et al. 2016

Acta Physico-Chimica Sinica

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Investigating the interactions between anionic surfactants and cations is of great theoretical and practical significance to understanding the precipitation and solubility of anionic surfactant products but relevant theoretical interaction models are seldom reported. In this paper, the density functional theory (DFT) method was used to investigate the interactions of the dodecylbenzenesulfonate anion (DBS -) with Na + , Mg 2+ , and Ca 2+ both in the solution and at the air/water interface. In the solution, DBS -/cation interaction models were built and optimized with consideration of two different solutions (i.e. water and n-dodecane). The results indicate that DBScan bind stably with the cations in a bidentate form. The binding energy of the DBS -/cation depends on the properties of both the participating cation and the solvent. At the air/water interface, DBSformed a stable hydrated complex with six water molecules (i.e. DBS -•6H2O). However, the structure of DBS -•6H2O was greatly disturbed by the introduction of the cation. A dimensionless parameter, def, was proposed to evaluate the deformation extent of the hydration shell. The degree of disturbance by the cations follows the order: Ca 2+ >

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“…2,3,17,18,[22][23][24][25][36][37][38] give the concentration of DDAO causing precipitation at specified concentration of SDS (C ds ). The Simultaneous Equation Solver (SEQS) developed by CET Research was used to solve the nonlinear set of equations.…”

Section: Numerical Solutionsmentioning

confidence: 99%

Interaction Between an Anionic and an Amphoteric Surfactant. Part II: Precipitation

Soontravanich

Walsh

Harwell

et al. 2009

J Surfact & Detergents

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Use of amphoteric and anionic surfactants is very common in practical formulations such as shampoos and hand dishwashing products. Precipitation of mixtures of dimethyldodecylamine oxide (DDAO) as an amphoteric surfactant and sodium dodecyl sulfate (SDS) as an anionic surfactant were studied at different pH levels. The DDAO is a pH-sensitive surfactant and its protonation can be expressed in terms of a pK a similar to an acid dissociation constant. The protonated form of DDAO carries a positive charge and precipitates with the oppositely charged SDS. Therefore, precipitation phase boundaries are pH dependent due to the varying degree of DDAO protonation. By combining the use of regular solution theory and the pseudophase separation model to describe micellar mixing nonidealities with the precipitate solubility product constant and the protonation dissociation constant, a model to predict the precipitation phase boundary is presented here. The model agrees well with experimental phase boundaries at different pH levels.

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Anionic surfactant precipitation in hard water

Cited by 30 publications

References 13 publications

Design of an optimal middle phase microemulsion for ultra high saline brine using hydrophilic lipophilic deviation (HLD) method

Design of an optimal middle phase microemulsion for ultra high saline brine using hydrophilic lipophilic deviation (HLD) method

Density Functional Theory Study of the Interaction between Sodium Dodecylbenzenesulfonate and Mineral Cations

Interaction Between an Anionic and an Amphoteric Surfactant. Part II: Precipitation

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