US 11,858,878 B2
Gemini surfactant composition and method for treating subterranean rock
Syed M. Shakil Hussain, Dhahran (SA); Muhammad Shahzad Kamal, Dhahran (SA); and Abdullah S. Sultan, Dhahran (SA)
Assigned to KING FAHD UNIVERSITY OF PETROLEUM AND MINERALS, Dhahran (SA)
Filed by KING FAHD UNIVERSITY OF PETROLEUM AND MINERALS, Dhahran (SA)
Filed on Nov. 3, 2022, as Appl. No. 18/052,231.
Application 18/052,231 is a continuation of application No. 16/281,849, filed on Feb. 21, 2019, granted, now 11,512,045.
Claims priority of provisional application 62/633,314, filed on Feb. 21, 2018.
Prior Publication US 2023/0132932 A1, May 4, 2023
Int. Cl. C07C 237/16 (2006.01); C09K 8/584 (2006.01); C07C 381/06 (2006.01); C11D 1/00 (2006.01); C07C 233/36 (2006.01); C07C 233/38 (2006.01); C07C 231/02 (2006.01); E21B 43/16 (2006.01)
CPC C07C 237/16 (2013.01) [C07C 233/36 (2013.01); C07C 233/38 (2013.01); C07C 381/06 (2013.01); C09K 8/584 (2013.01); C11D 1/00 (2013.01); C07C 231/02 (2013.01); C09K 2208/30 (2013.01); E21B 43/16 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A gemini surfactant, comprising:
a cation part having a structure (I), and
an anion part having a combined charge of −2,

OG Complex Work Unit Chemistry
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.