Waterflood method using overbased normal alkylaromatic sulfonates
Patent
·
OSTI ID:6619518
A method is described for preparing an anionic water-flood surfactant. A normal alkane having about 10 to about 18 carbon atoms is partially chlorinated to about 2 to about 15% by wt chlorine content. The chlorinated alkane is used to alkylate an aromatic hydrocarbon, such as benzene. The thus formed alkylate is sulfonated to form a sulfonic acid. The sulfonic acid is converted to a sulfonate by reacting it with a base component, such as an alkali metal hydroxide, ammonium hydroxide, or an alkali metal carbonate. The sulfonate is overbased by mixing with an excess of base component such that the ratio weight of excess base component/weight of sulfonate is 0.03 to 3.0 The anionic surfactant is injected into a petroliferous formation, the formation is waterflooded, and oil is recovered. (14 claims)
- Assignee:
- Continental Oil Co.
- Patent Number(s):
- US 3965984
- OSTI ID:
- 6619518
- Country of Publication:
- United States
- Language:
- English
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