US 11,725,139 B2
Manipulating hydrophilicity of conventional dye molecules for water tracer applications
Wei Wang, Cambridge, MA (US)
Assigned to Saudi Arabian Oil Company, Dhahran (SA)
Filed by Saudi Arabian Oil Company, Dhahran (SA)
Filed on Dec. 13, 2021, as Appl. No. 17/548,837.
Prior Publication US 2023/0183564 A1, Jun. 15, 2023
Int. Cl. C09K 11/06 (2006.01); C09B 11/24 (2006.01); C09B 11/22 (2006.01); C09B 67/00 (2006.01); C09K 8/035 (2006.01); C09K 8/62 (2006.01); E21B 47/11 (2012.01)
CPC C09K 11/06 (2013.01) [C09B 11/22 (2013.01); C09B 11/24 (2013.01); C09B 68/4235 (2013.01); C09B 68/4253 (2013.01); C09B 68/463 (2013.01); C09K 8/035 (2013.01); C09K 8/62 (2013.01); E21B 47/11 (2020.05); C09K 2211/1007 (2013.01); C09K 2211/1014 (2013.01); C09K 2211/1018 (2013.01)] 3 Claims
 
1. A composition comprising:
a functionalized fluorescent dye, wherein the functionalized fluorescent dye comprises an isothiocyanate-containing dye functionalized with a functional group comprising a primary amine, wherein:
the isothiocyanate-containing dye is selected from the group consisting of Rhodamine B isothiocyanate, or tetramethylrhodamine isothiocyanate; and
the functional group is selected from Group I or Group II, wherein:
Group I consists of aminomethanesulfonic acid, 2-aminoethanesulfonic acid, 3-amino-1-propanesulfonic acid, 2-aminoethyl(trimethyl)azanium, and 3-aminopropyl(trimethyl)azanium; and
Group II consists of 4-aminobenzenesulfonic acid, 3-aminobenzenesulfonic acid, 2-aminobenzenesulfonic acid, 3-amino-4-hydroxybenzenesulfonic acid, 4-amino-3-hydroxybenzenesulfonic acid, (4-aminophenyl)-trimethylazanium, 6-amino-4-hydroxy-2-naphthalenesulfonic acid, 1-amino-2-naphthol-4-sulfonic acid, 7-aminonaphthalene-1,3-disulfonic acid, 4-aminonaphthalene-1,7-di sulfonic acid, 8-amino-1,3,6-naphthalenetrisulfonic acid, and 8-aminopyrene-1,3,6-trisulfonic acid.