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1. US5117058 - Cationic amide/ester compositions as demulsifiers

Note: Texte fondé sur des processus automatiques de reconnaissance optique de caractères. Seule la version PDF a une valeur juridique

[ EN ]
We claim:
1. Cationic monomeric amide compositions useful as demulsifiers in water-in-oil emulsions, said cationic monomeric amide compositions having the structure: where R 1 represents an alkylene group of the formula C n H 2n, an alkenylene group of the formula C n H n, or a phenylene group, or mixtures thereof, where n equals 0 to 10; R 2 represents C m H 2m, where m equals 1 to 4; R 3 independently represents methyl, ethyl or propyl; and the combination of R 4 and X--represents the remnant from a quaternizing agent.
2. The cationic monomeric amide compositions of claim 1 where the quaternizing agent is selected from the group consisting of epichlorohydrin, dimethyl sulfate, alkyl halides and benzyl chloride.
3. Cationic monomeric amide compositions comprising the reaction product of:
a dicarboxylic acid or an ester or an acid halide thereof;
an aminoalkylamine; and
a quaternizing agent where the cationic monomeric compositions are selected from the group consisting of cationic monomeric amides; cationic monomeric amide/esters and mixtures thereof.
4. The cationic monomeric compositions of claim 3 where the dicarboxylic acid or an ester thereof has from about 2 to about 20 carbon atoms.
5. The cationic monomeric compositions of claim 3 where the aminoalkylamine is selected from the group consisting of dimethylaminopropylamine, dimethylaminoethylamine, diethylaminopropylamine, diethylaminoethylamine and mixtures thereof.
6. The cationic monomeric compositions of claim 3 where the quaternizing agent is selected from the group consisting of epichlorohydrin, dimethyl sulfate, alkyl halides and benzyl chloride.
7. The cationic monomeric compositions of claim 3 where an oxyalkylated surface active agent is present as a reactant with the compositions or as a separate component blended therewith.
8. Cationic monomeric amide compositions useful as demulsifiers in water-in-oil emulsions, said cationic monomeric compositions made by the process comprising the steps of:
reacting a dicarboxylic acid or its ester or an acid halide thereof, with an aminoalkylamine to give an intermediate; and
reacting the intermediate with a quaternizing agent where the cationic monomeric compositions are selected from the group consisting of cationic monomeric amides; cationic monomeric amide/esters and mixtures thereof.
9. The cationic monomeric compositions of claim 8 where the dicarboxylic acid or an ester thereof has from about 2 to about 20 carbon atoms.
10. The cationic monomeric compositions of claim 8 where the aminoalkylamine is selected from the group consisting of dimethylaminopropylamine, dimethylaminoethylamine, diethylaminopropylamine, diethylaminoethylamine and mixtures thereof.
11. The cationic monomeric compositions of claim 8 where the quaternizing agent is selected from the group consisting of epichlorohydrin, dimethyl sulfate, alkyl halides and benzyl chloride.
12. The cationic monomeric compositions of claim 8 where the reaction of the dicarboxylic acid with the aminoalkylamine is conducted in the presence of a basic catalyst.
13. Cationic monomeric amide compositions useful as demulsifiers in water-in-oil emulsions, said cationic monomeric compositions comprising the reaction product of
a dicarboxylic acid of the formula: where R 1 represents C n H 2n, where n equals 0 to 10, or an ester or an acid halide thereof;
an aminoalkylamine selected from the group consisting of dimethylaminopropylamine, dimethylaminoethylamine, diethylaminopropylamine, diethylaminoethylamine and mixtures thereof;
a quaternizing agent is selected from the group consisting of epichlorohydrin, dimethyl sulfate, alkyl halides and benzyl chloride; and
from about 0 to about 40 wt. % of at least one oxyalkylated surface active agent having HLB between about 7 and about 16.