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US 11,858,878 B2Granted
Gemini surfactant composition and method for treating subterranean rock
AssigneeKing Fahd University of Petroleum and Minerals
InventorsSyed M. Shakil Hussain, Muhammad Shahzad Kamal, Abdullah S. Sultan
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Abstract
The invention concerns synthesized amido-amine-based cationic gemini surfactants with flexible and rigid spacers and different hydrophobic. These gemini surfactants were prepared by modified procedure through amidation of long chain carboxylic acids using 3-(dimethylamino)-1-propylamine followed by treatment with halohydrocarbons and showed excellent thermal stability and surface properties useful for various oilfield applications such as enhanced oil recovery.
Claims18
A gemini surfactant, comprising:
- a cation part having a structure (I), and
- an anion part having a combined charge of −2,
- wherein:
- R1 and R2 are C8-C30 alkyl or C10-C30 alkenyl,
- S is a C4-C8 alkenylene spacer, and
- n and n′ are integer values from 2 to 5.
3 more elements
Dependencies are inferred from the claim text.