US 12,226,751 B2
Imidazolium ionic liquids made using cardanol extracted from cashew nutshell oil to enhance crude oil recovery in oilfields
Ayman M. Atta, Riyadh (SA); Hamad A. Al-Lohedan, Riyadh (SA); Abdelrahman O. Ezzat, Riyadh (SA); and Ali K Aldalbahi, Riyadh (SA)
Assigned to KING SAUD UNIVERSITY, Riyadh (SA)
Filed by KING SAUD UNIVERSITY, Riyadh (SA)
Filed on Mar. 21, 2024, as Appl. No. 18/612,458.
Application 18/612,458 is a division of application No. 18/212,034, filed on Jun. 20, 2023, granted, now 11,969,708.
Prior Publication US 2024/0424478 A1, Dec. 26, 2024
Int. Cl. B01J 20/04 (2006.01); B01J 20/06 (2006.01); B01J 20/10 (2006.01); B01J 20/26 (2006.01); B01J 20/28 (2006.01); B01J 20/30 (2006.01); B01J 20/32 (2006.01); C02F 1/28 (2023.01); C02F 1/68 (2023.01); C07D 233/60 (2006.01); C08G 65/331 (2006.01); C08G 65/333 (2006.01); C08G 65/337 (2006.01); E02B 15/04 (2006.01); C02F 101/32 (2006.01); C02F 103/08 (2006.01)
CPC B01J 20/265 (2013.01) [B01J 20/043 (2013.01); B01J 20/06 (2013.01); B01J 20/103 (2013.01); B01J 20/28009 (2013.01); B01J 20/28016 (2013.01); B01J 20/3085 (2013.01); B01J 20/3204 (2013.01); B01J 20/3221 (2013.01); B01J 20/3287 (2013.01); B01J 20/3293 (2013.01); C02F 1/288 (2013.01); C02F 1/681 (2013.01); C07D 233/60 (2013.01); C08G 65/3317 (2013.01); C08G 65/33317 (2013.01); C08G 65/337 (2013.01); E02B 15/041 (2013.01); C02F 1/281 (2013.01); C02F 1/285 (2013.01); C02F 2101/32 (2013.01); C02F 2103/08 (2013.01)] 3 Claims
 
1. A method for preparing a dicardnyl tri-imidazolium ionic liquid (DCTIm), the method comprising:
heating a dicardenoxy imidazolium ionic liquid (DCIm) with an alkyl halide; and
obtaining the dicardnyl tri-imidazolium ionic liquid (DCTIm);
wherein the DCIm is prepared according to a 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:

OG Complex Work Unit Chemistry
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:

OG Complex Work Unit Chemistry
dissolving the CIm in acetic acid or trifluoroacetic acid to obtain an amine solution; and
adding an aldehyde solution to the amine solution to obtain the DCIm.