Cationic amide/ester compositions as demulsifiers
US5117058A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 9, 1990 |
| Grant date | May 26, 1992 |
| Priority date | — |
| Expiry date | Nov 9, 2010 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C233/38
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Novel cationic amide compositions having the structure ##STR1## where R.sup.1 represents an alkylene group of the formula C.sub.n H.sub.2n, and alkenyl group of the formula C.sub.n H.sub.n, or a phenyl group, or mixtures thereof, where n equals 0 to 10; R.sup.2 represents C.sub.m H.sub.2m, where m equals 1 to 4; R.sup.3 independently represents methyl, ethyl or propyl; and the combination of R.sup.4 and X.sup.- represents the remnant from a quaternizing agent have been discovered and have been found useful as demulsifiers in breaking petroleum emulsions as might be produced during fireflooding petroleum recovery procedures. In one embodiment, the cationic amide/ester compositions are made by reacting (1) a dicarboxylic acid of the formula: ##STR2## where R.sup.1 represents C.sub.n H.sub.2n, where n equals 0 to 10, or an ester or an acid halide thereof; (2) and aminoalkylamine selected from the group consisting of dimethylaminopropylamine, dimethylaminoethylamine, diethylaminopropylamine, diethylaminoethylamine and mixtures thereof; (3) a quaternizing agent is selected from the group consisting of epichlorohydrin, dimethyl sulfate, alkyl halides and benzyl chloride; and (4) from abo…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.