Alkylaromatic sulfonates

Sulfonic acids can come from the sulfonation of oil cuts from white oil production by sulfuric acid treatment. Sodium salts of alkylaromatic sulfonic acids are compounds whose aliphatic chains contain around 20 carbon atoms. The aromatic ring compounds are mixtures of benzene and naphthalene rings. 

Thermal stabihty of the foaming agent in the presence of high temperature steam is essential. Alkylaromatic sulfonates possess superior chemical stabihty at elevated temperatures (205,206). However, alpha-olefin sulfonates have sufficient chemical stabihty to justify their use at steam temperatures characteristic of most U.S. steamflood operations. Decomposition is a desulfonation process which is first order in both surfactant and acid concentrations (206). Because acid is generated in the decomposition, the process is autocatalytic. However, reservoir rock has a substantial buffering effect. 

The alpha-olefin sulfonates (AOS) have been found to possess good salt tolerance and chemical stabiUty at elevated temperatures. AOS surfactants exhibit good oil solubilization and low iaterfacial tension over a wide range of temperatures (219,231), whereas less salt tolerant alkylaromatic sulfonates exhibit excellent chemical stabiUty. The nature of the alkyl group, the aryl group, and the aromatic ring isomer distribution can be adjusted to improve surfactant performance under a given set of reservoir conditions (232,233). 

CALCIUM ALKYLAROMATIC SULFONATE (27176-87-0) CijHjoOjS Combustible liquid. Forms explosive mixture with air (flash point 395°F/202°C). Strong oxidizers may cause fire and explosions. Contact with strong acids forms highly toxic sulfur oxide fumes. Reacts with alkalis. Corrosive to metals. When heated to decomposition releases highly toxic sulfur oxide fumes. On small fires, use dry chemical powder (such as Purple-K-Powder), alcohol-resistant foam, or COj extinguishers. 

CALCIUM ALKYLAROMATIC SULFONATE (27176-87-0) Forms explosive mixture with air (flash point 100°F/38°C). Strong oxidizers may cause fire and explosions. Reacts with alkalis. Corrosive to metals. 

Soups, salts of naphthenic acids, aromatic and alkylaromatic sulfonates Turkish red oil, and sulfaled castor... 

The sulfoxidation of aliphatic hydrocarbons is the easiest method for the synthesis of alkylsulfonic acids. Their sodium salts are widely used as surfactive reactants in technology and housekeeping. Platz and Schimmelschmidt [1] were the first to invent this synthetic method. Normal paraffins (Ci4-Cig) are used for the industrial production of alkylsulfonic acids [2-4]. Olefins and alkylaromatic hydrocarbons do not produce sulfonic acids under the action of sulfur dioxide and dioxygen and retard the sulfoxidation of alkanes [5-9],... 

Desbbne, P. L., C. Rony, High-performance CE of alkylaromatics used as bases of sulfonation in the preparation of industrial surfactants, 7. Chromatogr. A, 1995,689, 107—121. 

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