Back to results
US 12,208,370 B2Granted
Imidazolium ionic liquids made using cardanol extracted from cashew nutshell oil to enhance crude oil recovery in oilfields
AssigneeKing Saud University
InventorsAyman M. Atta, Hamad A. Al-Lohedan, Abdelrahman O. Ezzat, Ali K. Aldalbahi
Life of this patent
Estimating the term…
Abstract
Modified chemical structures of cardanol extracted from cashew nut shell oil, and the use of the same to prepare imidazolium ionic liquids (IILs). The IILs can be used to prepare different types of silica, magnetite and calcium carbonate nanoparticles (NPs) as multifunctional oilfield chemicals for use in various oil spill collection, de-emulsification, viscosity improvement, asphaltene dispersant, and enhanced oil recovery applications.
Claims3
A method for preparing a dicardenoxy imidazolium ionic liquid (DCIm), the method comprising:
- obtaining cardanol extracted from cashew nut oil;
- dissolving the cardanol in a mixture of epichlorhydrin and water to obtain CGE having the formula:
- mixing the CGE with a compound of the formula H2N—(—CH2—CH2—NH)n—H, wherein n is an integer between 3 and 5, to obtain a cardanol amine (CIm) having the formula:
- dissolving the CIm in acetic acid or trifluoroacetic acid to obtain an amine solution;
- and
- adding a mixture of glyoxal monohydrate and formaldehyde to the amine solution to obtain the dicardenoxy imidazolium ionic liquid (DCIm).
3 more elements
Dependencies are inferred from the claim text.