Dibasic esters utilized as terpene co-solvents, substitutes and/or carriers in tar sand/bitumen/asphaltene cleaning applications
US8628626B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 8, 2011 |
| Grant date | Jan 14, 2014 |
| Priority date | — |
| Expiry date | Dec 8, 2031 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC11D3/2093
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A heavy oil cleaning composition comprising: a) a blend of dibasic esters comprising dialkyl methylglutarate and at least one of a dialkyl adipate or dialkyl ethylsuccinate; b) at least one terpene; and c) at least one surfactant. Also described are methods for delivering a solvent at reduced concentration comprising the steps of: a) obtaining a terpene-based solvent; and b) mixing the terpene-based solvent with a carrier fluid (the carrier fluid comprising a microemulsion of i) a blend of dibasic esters selected from the group consisting of dialkyl methylglutarate, dialkyl adipate, dialkyl ethylsuccinate, dialkyl succinate, dialkyl glutarate and any combination thereof, ii) at least one surfactant selected from the group consisting of a terpene alkoxylate, an alcohol alkoxylate and any combination thereof; and iii) water) in order to obtain a mixture to clean heavy oils.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.