Kinetic study of desulfonation of disulfonated alkyl diphenyloxide surfactants

Journal Article · Wed Dec 01 04:00:00 EST 1982 · Soc. Pet. Eng. AIME, Pap.; (United States)

DOI:https://doi.org/10.2118/10936-PA· OSTI ID:6329036

Marriott, R C; Kao, C I; Kristal, F W

Kinetic study of the desulfonation of Dowfax surfactants, disulfonated alkyl diphenyloxide, is carried out in the temperature range of from 177 to 272/sup 0/C, and a pH range of 2.0 to 7.0. The rate data support that the desulfonation is a step-wise reaction catalyzed by hydrogen ion. The desulfonation rate is first-order with respect to both surfactant and hydrogen ion concentrations. As a result, the pH of the reaction system has a very significant effect on the stability of the surfactants and may outweigh the effect of temperature. The halflife of disulfonated alkyl diphenyloxide at 235/sup 0/C in a 5.5-pH buffer solution is 1,035 days, and at 272/sup 0/C in a 7.0-pH buffer solution is 295 days. The results indicate that these surfactants can be used in most oil reservoir steamflood applications, especially when the rock formation may buffer the pH to about 7.0.

• Research Organization: Dow Chemical Co
• OSTI ID: 6329036
• Journal Information: Soc. Pet. Eng. AIME, Pap.; (United States), Journal Name: Soc. Pet. Eng. AIME, Pap.; (United States) Vol. 22:6; ISSN SEAPA
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400301 -- Organic Chemistry-- Chemical & Physicochemical Properties-- (-1987)
BUFFERS
CHARGED PARTICLES
CHEMICAL REACTIONS
DESULFURIZATION
ENHANCED RECOVERY
FLUID INJECTION
HYDROGEN IONS
IONS
KINETICS
OIL WELLS
PH VALUE
RECOVERY
STABILITY
STEAM INJECTION
SURFACTANTS
TEMPERATURE MEASUREMENT
THERMAL RECOVERY
WELLS