Cationic amide/ester compositions as demulsifiers

Details Cationic amide/ester compositions as demulsifiers Cationic amide/ester compositions as demulsifiers

1990-11-09

1992-05-26

Hollrah, Glennon H.

Organic compounds -- part of the class 532-570 series

Organic compounds

Amino nitrogen containing

564152, 564155, 564156, 564159, 564160, C07C23305, C07C23364

Patent

active

051170582

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 about 0 to about 40 wt. % of at least one oxyalkylated surface active agent having HLB between about 7 and about 16.

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