Instituto Mexicano Del Petroleo

Gerardo Zavala Olivares

Edgar Benedicto Zamora Guerrero

Flavio Salvador Vazquez Moreno

Fernando Alvarez Ramirez

Cesar Andres Flores Sandoval

Jessica Valeria Fuentes Santiago

Enrique Cevada Maya

Erika Gomez Buendia

Citlally Janinne Vargas Martinez

Alfonso Lopez Ortega

Flavio Salvador Vázquez Moreno

César Andrés Flores Sandoval

Fernando Alvarez Ramírez

Alfonso López Ortega

Juan De La Cruz Clavel López

Edgar Iván Hernández Carbajal

Edgar Ivan Hernandez Carbajal

Marco Antonio Chavez Mora

Citlally Janinne Vargas Martínez

Erika Gómez Buendía

Fernando Álvarez Ramírez

Rodrigo De Jesús García Jiménez

Juan De Clavel Lopez

Rodrigo De Garcia Jimenez

The present disclosure belongs to the field of chemical products for petroleum conditioning, in particular demulsifying agents. This disclosure concerns the application of terpolymers based on combinations of alkyl acrylates, aminoalkyl acrylates, and alkoxyalkyl acrylates, to destabilize water-in-oil (W/O) emulsions, in order to remove the emulsified water and salts dissolved in it, specifically, in the triphasic separation units for crude oils with API densities from 8 to 40° API.

Alkylated, aminated and alkoxylated macromolecules with integrated trifunctional properties for the removal of petroleum emulsions

The present invention is related to the use of ethylene alkanoate-alkyl acrylate bipolymers with a high randomness monomers distribution, which are synthesized by semicontinuous emulsion polymerization process, characterized because it is carried out using slow addition rate of the pre-emulsion feeding ({dot over (q)}≤0.009 kg·L·min), stabilized this last one by alkyl glycol ether type surfactants, at temperatures higher than 75° C. and with solids contents above 25 wt %, which avoids the formation of large sequences (blocks) of a same monomer. This structural characteristic gives the ethylene alkanoate-alkyl acrylate bipolymers a high efficiency as chemical agents for removal of complex water/crude oil emulsions of crude oil blends.

Highly random addition bypolymers for destabilization of complex emulsions in crude oil blends

The present invention is related to the use of ethylene alkanoate-alkyl acrylate bipolymers with a high randomness monomers distribution, which are synthesized by semicontinuous emulsion polymerization process, characterized because it is carried out using slow addition rate of the pre-emulsion feeding ({dot over (q)}≤0.009 kgL·L·min), stabilized this last one by alkyl glycol ether type surfactants, at temperatures higher than 75° C. and with solids contents above 25 wt %, which avoids the formation of large sequences (blocks) of a same monomer. This structural characteristic gives the ethylene alkanoate-alkyl acrylate bipolymers a high efficiency as chemical agents for removal of complex water/crude oil emulsions of crude oil blends.

The present invention is related to the use of ethylene alkanoate-alkyl acrylate bipolymers with a high randomness monomers distribution, which are synthesized by semicontinuous emulsion polymerization process, characterized because it is carried out using slow addition rate of the pre-emulsion feeding ({dot over (q)}&#x2264;0.009 kg&#xb7;L&#xb7;min), stabilized this last one by alkyl glycol ether type surfactants, at temperatures higher than 75&#xb0; C. and with solids contents above 25 wt %, which avoids the formation of large sequences (blocks) of a same monomer. This structural characteristic gives the ethylene alkanoate-alkyl acrylate bipolymers a high efficiency as chemical agents for removal of complex water/crude oil emulsions of crude oil blends.

Disclosed are chemical products useful for crude oil conditioning, particularly to demulsifying basic compounds. Disclosed are PEO-PPO-PEOtriblock bipolymers, with amphoteric groups, &#x3b2;-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.

PEO-PPO-PEO triblock bipolymers, with amphoteric endings, as demulsifying agents for heavy crude oils

Nowadays, one of the major problems of the oil industry is the presence of large amounts of water and salts, which cannot be efficiently removed by conventional dehydrating polymers. In addition, the acid stimulation operations of petroleum wells cause the chemical degradation of demulsifiers such as polyethers and phenolic resins, reducing drastically their efficiency as water and salt removers. Based on aforementioned, a series of new copolymers has been developed; these copolymers are combinations of an acrylic and an aminoacrylic monomer and they are synthesized by semi-continuous emulsion polymerization (under starved feed conditions), which ensures both the homogeneity of the different chains as well as the randomness of the monomers distribution. The solutions of one of these random copolymers have shown an efficiency similar or superior to combinations of two or three block copolymers (formulations), when they are applied in light or heavy crude oils. The acrylic-aminoacrylic copolymers show good performance as water/oil emulsion breaker initiators, coalescence agents of water droplets and clarifiers of the remaining aqueous phase. In addition, the chemical structure of the acrylic copolymers confers resistance to degradation induced by abrupt pH changes when acid stimulation operations of wells are performed.

Demulsifiers for crude oil based on acrylic-aminoacrylic random copolymers of controlled molecular mass

A problem of the crude oil industry is the presence of large amounts of water and salts, which can not be efficiently removed by conventional dehydrating polymers. In addition, the acid stimulation operations of petroleum wells cause the chemical degradation of demulsifiers such as polyethers and phenolic resins, reducing drastically their efficiency as water and salt removers. Disclosed herein is a series of new copolymers that are combinations of an alkyl acrylate and a carboxyalkyl acrylate, synthesized by semi-continuous emulsion polymerization (under starved feed conditions), which ensures both the homogeneity of the different chains as well as the randomness of the monomers distribution. The acrylic-carboxyacrylic copolymers show good performance as water/oil emulsion breaker initiators, water droplet coalescers and clarifiers of the remaining aqueous phase. These novel acrylic-carboxyacrylic copolymers show a higher clarification capacity in comparison with acrylic copolymers [19], vinyl acrylics [12] and polyethers.

Water/crude oil removers based on alkylacrylic-carboxyalkylacrylic random copolymers of controlled molecular mass

Growing community of inventors

Mexico City, Mexico

Gerardo Zavala Olivares