Hyperbranched polyesters and polycarbonates as demulsifiers...

B - Operations – Transporting – 01 – D

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B01D 17/04 (2006.01) C08G 63/20 (2006.01) C08G 64/02 (2006.01) C08G 64/14 (2006.01) C10G 33/04 (2006.01)

Patent

CA 2747990

The invention relates to the use of non-dendrimer, highly functional, hyperbranched polyesters and polycarbonates, which can be obtained by reacting (i) at least one aliphatic, cycloaliphatic, araliphatic, or aromatic dicarboxylic acid (A2) or derivatives thereof, or organic carbonates (A2') with (ii) at least one x-valent aliphatic, cycloaliphatic, araliphatic, or aromatic alcohol (C x), which comprises more than two OH groups, where x is a number greater than 2, preferably 3 to 8, particularly preferred 3 to 6, very particularly preferred 3 to 4, and especially 3, and (iii) at least one fatty acid amide alkoxylate (D) of saturated or unsaturated C2-C30 fatty acid amides having on average 1 to 40 alkylene oxide units, as demulsifiers for cracking crude oil emulsions.

L'invention concerne l'utilisation de polyesters et polycarbonates hyperramifiés, non dendrimères, à fonctionnalité élevée, pouvant être obtenus par transformation (i) d'au moins un acide dicarboxylique (A2) aliphatique, cycloaliphatique, araliphatique ou aromatique ou de dérivés de ce dernier, ou de carbonates organiques (A2') avec (ii) au moins un alcool x-valent aliphatique, cycloaliphatique, araliphatique ou aromatique (Cx), présentant plus de deux groupes OH, x étant un nombre supérieur à 2, de préférence entre 3 et 8, de manière particulièrement préférée entre 3 et 6, mieux encore entre 3 et 4 et étant idéalement égal à 3, et (iii) au moins un alcoxylat d'amide d'acide gras (D) constitué d'amides d'acide gras en C2-C30 saturés ou insaturés avec en moyenne 1 à 40 unités d'oxyde d'alkyle. Les polyesters ou polycarbonates selon l'invention peuvent servir de désémulsifiants pour le craquage d'émulsions de pétrole brut.

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