US 11,834,607 B2
Additives for enhanced extraction of bitumen
Cole A. Witham, Freeport, TX (US); Roxanne M. Jenkins, Lake Jackson, TX (US); and Biplab Mukherjee, Lake Jackson, TX (US)
Assigned to Dow Global Technologies LLC, Midland, MI (US)
Appl. No. 16/973,870
Filed by Dow Global Technologies LLC, Midland, MI (US)
PCT Filed Jun. 28, 2019, PCT No. PCT/US2019/039847
§ 371(c)(1), (2) Date Dec. 10, 2020,
PCT Pub. No. WO2020/006422, PCT Pub. Date Jan. 2, 2020.
Claims priority of provisional application 62/691,713, filed on Jun. 29, 2018.
Prior Publication US 2021/0301194 A1, Sep. 30, 2021
Int. Cl. C09K 8/592 (2006.01); E21B 43/24 (2006.01); C10G 1/04 (2006.01)
CPC C09K 8/592 (2013.01) [C10G 1/045 (2013.01); C10G 1/047 (2013.01); E21B 43/2406 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A method for recovering bitumen from oil sands, comprising:
contacting the bitumen in the oil sands with (i) steam, water, or both steam and water, and (ii) an organic polyamine having more than two and up to eight amino groups and having a boiling point at one atmosphere of greater than 145° C. and up to 446° C.
reducing the viscosity of the bitumen with the (i) steam, water, or both steam and water, and (ii) organic polyamine; and
recovering the bitumen with the reduced viscosity from the oil sands.