Effect of addition of ethoxylated sulfonate on salt tolerance, optimal salinity, and impedence characteristics of petroleum sulfonate solutions

Journal Article · Sat Jul 01 04:00:00 EDT 1978 · J. Colloid Interface Sci.; (United States)

DOI:https://doi.org/10.1016/0021-9797(78)90096-6· OSTI ID:6576347

Bansal, V K; Shah, D O

The increase in salt concentration causes very unusual changes in the optical appearance of the surfactant formulations reported in this study. At low salt concentration, the surfactant (TRS 10-410) solutions are isotropic and clear. With an increase in salt concentration, precipitation of surfactant occurs. However, upon further increase in salt concentration, the precipitate redissolves in the solution and a stable birefringent phase forms. Upon further increase in salt concentration, the birefringent phase is destroyed and phase separation occurs. The petroleum sulfonate solutions have very poor salt tolerance (about 2.5% NaCl). However, upon addition of an ethoxylated sulfonate (EOR-200) into petroleum sulfonate, the salt tolerance of the mixed surfactant formulation markedly increases. By itself, the salt tolerance for the phase separation of the petroleum sulfonate or the ethoxylated sulfonate (EOR-200) is respectively 2.5 and 18% NaCl. However, upon blending these 2 surfactants in a 1:4 weight ratio, the salt tolerance for phase separation is found to be 24% NaCl, suggesting a synergistic effect of blending these 2 sulfonates for salt tolerance. (38 refs.)

• Research Organization: Florida Univ, Gainesville
• OSTI ID: 6576347
• Journal Information: J. Colloid Interface Sci.; (United States), Journal Name: J. Colloid Interface Sci.; (United States) Vol. 65:3; ISSN JCISA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201 -- Chemical & Physicochemical Properties
400301* -- Organic Chemistry-- Chemical & Physicochemical Properties-- (-1987)
ADDITIVES
BIREFRINGENCE
ESTERS
OPTICAL PROPERTIES
ORGANIC COMPOUNDS
ORGANIC SULFUR COMPOUNDS
PETROLEUM SULFONATES
PHYSICAL PROPERTIES
PRECIPITATION
REFRACTION
SALTS
SEPARATION PROCESSES
SULFONATES
SULFONIC ACID ESTERS
SURFACTANTS