Peo-ppo-peo triblock bipolymers, with amphoteric endings, as demulsifying agents for heavy crude oils
AssigneeInstituto Mexicano Del Petroleo
InventorsCesar Andres FLORES SANDOVAL, Flavio Salvador VAZQUEZ MORENO, Alfonso LOPEZ ORTEGA, Fernando ALVAREZ RAMIREZ, Gerardo ZAVALA OLIVARES, Jessica Valeria FUENTES SANTIAGO, Edgar Benedicto ZAMORA GUERRERO
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Abstract
Disclosed are chemical products useful for crude oil conditioning, particularly to demulsifying basic compounds. Disclosed are PEOw-PPOy-PEOw triblock bipolymers, with amphoteric groups, β-amino acid derivatives, at the chain ends, which destabilize water-in-crude oil (W/O) emulsions, thereby removing emulsified water and salts dissolved salts in the aforementioned phase.
Claims13
PEOw-PPOy-PEOw triblock bipolymers, having amphoteric end groups, having Formulas (3) and (4)
- Where:
- IN=C2H4O2 (ethylene glycollate)
- R1 and R2=independent radicals represented by the groups:
- —H (hydrogen);
- —CH2(CH2)AB;
- —CEGJ;
- —CH2CHLM;
- —CH2(CH2)QM;
- where A is an integer from 1 to 11 and B is —H.
- EGJ are independent radicals represented by:
- —H, -methyl, ethyl, n-propyl, iso-propyl, sec-butyl, iso-butyl, tert-butyl, n-butyl, phenyl, cyclohexyl, cyclopentyl.
- L is a radical representing methyl and ethyl, and M is a hydroxyl group.
- Q is an integer from 1 to 5;
- T is representing groups:
- EGJ and NO2, Cl, F, Br.
- R3=H (hydrogen), CH3 (methyl), methoxide (CH3O).
- R4=H (hydrogen), CH3 (methyl), C3H5O2 (carboxyethyl), C4H7O2 (carboxypropyl) and C5H9O2 (carboxybutyl), C2H4O (ethoxy), C4H8O (butoxy),
- U is an integer from 1 to 2;
- X represents oxygen or nitrogen atoms;
- with the proviso that when X=nitrogen then V is represented by methyl, ethyl, n-propyl, iso-propyl, sec-butyl, iso-butyl, tert-butyl, n-butyl, phenyl, cyclopentyl or benzyl.
- Z represents a mono- or di-substitution at any ring position of 5- or 6-member rings, chosen from methyl, ethyl, n-propyl, iso-propyl, sec-butyl, iso-butyl, tert-butyl, n-butyl, phenyl, cyclohexyl, cyclopentyl, benzyl or hydroxyl.
- w is an integer from 4 to 90.
- y is an integer from 6 to 104.
- wherein the PEOw-PPOy-PEOw triblock bipolymers are demulsifying agents capable of removing water dispersed in crude oils, wherein the crude oils have an API density from 3 to 40° API;
- and
- wherein the triblock biopolymers have number average molecular weight from 600 to 10,000 g/mol.
Dependencies are inferred from the claim text.