公开(公告)号：US20220135886A1

公开(公告)日：2022-05-05

申请号：US17099635

申请日：2020-11-16

Applicant: INSTITUTO MEXICANO DEL PETROLEO

Inventor： Cesar Andres FLORES SANDOVAL ,  Flavio Salvador VAZQUEZ MORENO ,  Fernando ALVAREZ RAMIREZ ,  Gerardo ZAVALA OLIVARES ,  Erika GOMEZ BUENDIA ,  Enrique CEVADA MAYA ,  Jessica Valeria FUENTES SANTIAGO ,  Edgar Benedicto ZAMORA GUERRERO ,  Citlally Janinne VARGAS MARTINEZ

IPC: C10G33/04 ,  C08F220/18 ,  C08F216/38

Abstract: 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−1·min−1), 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.

公开(公告)号：US20210277314A1

公开(公告)日：2021-09-09

申请号：US16914776

申请日：2020-06-29

Applicant: INSTITUTO MEXICANO DEL PETROLEO

Inventor： Cesar Andres FLORES SANDOVAL ,  Flavio Salvador VAZQUEZ MORENO ,  Fernando ALVAREZ RAMIREZ ,  Gerardo ZAVALA OLIVARES ,  Jessica Valeria FUENTES SANTIAGO ,  Edgar Benedicto ZAMORA GUERRERO ,  Citlally Janinne VARGAS MARTINEZ

IPC: C10G33/04 ,  C08F220/18 ,  C08F220/34 ,  C08F220/28 ,  C08F2/22

Abstract: A problem the oil industry faces is the presence of great water and salt amounts in crude oil streams, which cannot be easily removed by conventional dehydrating polymers. Moreover, the acid stimulation of wells evokes the chemical degradation of the polyethers and phenolic resins used as demulsifiers, drastically reducing their water and salt removal efficiency. Disclosed herein are new terpolymers which are combinations of three derivative monomers from alkyl acrylate, aminoalkyl acrylate, and carboxyalkyl acrylate, synthesized via emulsion polymerization by semi-continuous process under starving feed conditions, in order to ensure both the homogeneity of the polymer chains and the randomness of the monomers. The dissolutions of the random terpolymers have displayed a comparable, and even superior, water removal efficiency when dosed in light or heavy crude oils. The random alkylacrylic-aminoalkylacrylic-carboxyalkylacrylic terpolymers present an outstanding performance as emulsion breakers, water droplets coalescers, and aqueous phase clarifiers.

公开(公告)号：US20200347173A1

公开(公告)日：2020-11-05

申请号：US16865033

申请日：2020-05-01

Applicant: INSTITUTO MEXICANO DEL PETROLEO

Inventor： Cesar Andres FLORES SANDOVAL ,  Flavio Salvador VAZQUEZ MORENO ,  Alfonso LOPEZ ORTEGA ,  Fernando ALVAREZ RAMIREZ ,  Gerardo ZAVALA OLIVARES ,  Jessica Valeria FUENTES SANTIAGO ,  Edgar Benedicto ZAMORA GUERRERO

IPC: C08F299/02 ,  C08L53/00 ,  C10G33/04

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.

公开(公告)号：US20190276750A1

公开(公告)日：2019-09-12

申请号：US16109135

申请日：2018-08-22

Applicant: INSTITUTO MEXICANO DEL PETROLEO

Inventor： Cesar Andres FLORES SANDOVAL ,  Marco Antonio CHAVEZ MORA ,  Edgar Benedicto ZAMORA GUERRERO ,  Alfonso LOPEZ ORTEGA ,  Gerardo ZAVALA OLIVARES ,  Fernando ALVAREZ RAMIREZ ,  Flavio Salvador VAZQUEZ MORENO

IPC: C10G33/04 ,  C08F220/34 ,  C08F220/18

Abstract: Nowadays, one of the major problems of the 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. Based on aforementioned, a series of new copolymers has been developed; these copolymers are combinations of an alkyl acrylate and a carboxyalkyl acrylate. These copolymers 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-carboxyacrylic copolymers show good performance as water/oil emulsion breaker initiators, water droplet coalescers and clarifiers of the remaining aqueous phase. In addition, it is important to remark that these novel acrylic-carboxyacrylic copolymers show a higher clarification capacity in comparison with acrylic copolymers [19], vinyl acrylics [12] and polyethers. Dehydrating capacity of acrylic-carboxyacrylic copolymers is higher than polyethers and resins available in the market. Besides, unlike the commercial polyethers or resins, the chemical structure of the acrylic-carboxyacrylic copolymers are resistant to chemical degradation induced by abrupt changes in pH, when acid stimulation is carried out in wells.