公开(公告)号：US20210147595A1

公开(公告)日：2021-05-20

申请号：US17147226

申请日：2021-01-12

Applicant: INSTITUTO MEXICANO DEL PETROLEO

Inventor： Edgar Ivan Hernandez Carbajal ,  César Andrés Flores Sandoval ,  Fernando Álvarez Ramírez ,  Alfonso López Ortega ,  Rodrigo de Jesús García Jiménez ,  Gerardo Zavala Olivares ,  Juan de la Cruz Clavel López ,  Flavio Salvador Vázquez Moreno

IPC: C08F220/18 ,  B01D17/04 ,  C10G33/04

Abstract: 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, where the copolymers are combinations of an acrylic and an aminoacrylic monomer and 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.

公开(公告)号：US10221349B2

公开(公告)日：2019-03-05

申请号：US15209480

申请日：2016-07-13

Applicant: INSTITUTO MEXICANO DEL PETROLEO

Inventor： Edgar Ivan Hernandez Carbajal ,  Enrique Cevada Maya ,  Alfonso Lopez Ortega ,  Cesar Andres Flores Sandoval ,  Fernando Alvarez Ramirez ,  Arquimedes Estrada Martinez ,  Flavio Salvador Vazquez Moreno

IPC: C09K8/588 ,  C10G29/22 ,  F15D1/02 ,  C10G33/04 ,  E21B21/06

Abstract: This invention is directed to a method for defoaming crude oil by the addition of copolymers based on silicone free alkyl acrylics defoamers for crude oils with densities between 10 and 40° API. The alkyl acrylic copolymers at conditions similar to those of gas-liquid separators are efficient foam formation inhibitors in heavy and super-heavy crude oils to reduce foam levels between 15 and 50% faster than non-dosed crude oil. Some acrylic copolymers exhibited a greater efficiency as defoamers than commercial silicones, which promote the defoaming only 20 or 25 vol % faster than the natural foam collapse. Silicones as defoamers present serious problems as the formation of deposits and the deactivation of catalysts in the refining processes. These problems have originated a series of interdictions to use silicon based defoamers and new chemical compounds completely silicon free are required to control the foam levels in the gas/petroleum separation tanks.

公开(公告)号：US10213708B2

公开(公告)日：2019-02-26

申请号：US14560179

申请日：2014-12-04

Applicant: INSTITUTO MEXICANO DEL PETROLEO

Inventor： Enrique Cevada Maya ,  Laura Veronica Castro Sotelo ,  Edgar Ivan Hernandez Carbajal ,  Cesar Andres Flores Sandoval ,  Alfonso Lopez Ortega ,  Aristeo Estrada Buendia ,  Fernando Alvarez Ramirez ,  Arquimedes Estrada Martinez ,  Flavio Salvador Vazquez Moreno

IPC: C10G29/22 ,  B01D19/04

Abstract: The present invention relates to the application based on alkyl acrylate homopolymers, such as antifoaming agents in crude oils with densities of 10 to 40° API. Evaluation tests in “live” crude oil, under similar gas-liquid separation equipment conditions, showed that these polymers based on alkyl acrylate are effective foaming inhibitors in heavy and super-heavy crude oils, reducing the foam between 15 and 50% faster compared to crude oil without an antifoaming agent. Some acrylics show better performance than commercial silicon-based polymers, which suppress foam 20-25% faster than the blank. The antifoaming agents of this invention, based on alkyl acrylate and totally free of silicon, is an advantageous option, to replace the silicone-based foam inhibitors currently on the market.