Method of preparing quaternized amidoamine surfactants
US6964940B1 · kind B1 · utility
14Cited by
4References
24Claims
0Family size
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Key dates
| Filing date | Jan 8, 2003 |
| Grant date | Nov 15, 2005 |
| Priority date | — |
| Expiry date | Aug 17, 2023 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C231/12
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
This invention is a method of preparing a quaternized amidoamine surfactant comprising reacting an amidotertiaryamine of formula with methyl halide and alkylene oxide, an aqueous quaternized amidoamine surfactant composition, a gelled aqueous composition comprising the quaternized amidoamine surfactant composition and one or more salts or alcohols and use of the gelled aqueous composition for fracturing subterranean formations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.