Patents by Inventor Cesar Andres FLORES SANDOVAL

Cesar Andres FLORES SANDOVAL has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20240327725
    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.
    Type: Application
    Filed: February 19, 2024
    Publication date: October 3, 2024
    Inventors: 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
  • Publication number: 20240294836
    Abstract: The present disclosure relates to novel demulsifying agents obtained from the functionalization of random bipolymers based on alkyl acrylate and aminoalkyl acrylate with different acrylic derivatives, using the aza-Michael addition reaction. The amphoteric random acrylic bipolymers were evaluated as demulsifying agents for crude oils with API densities between 10 and 40° API, showing superior performance as breakers, coalescers and clarifiers than the non-functionalized acrylic bipolymer and a commercial formulation based on polyethers.
    Type: Application
    Filed: October 4, 2023
    Publication date: September 5, 2024
    Inventors: César Andrés Flores Sandoval, Flavio Salvador Vázquez Moreno, Gerardo Zavala Olivares, Patricia Pérez Romo, Jorge Alberto García Martínez, Jessica Valeria Fuentes Santiago, Edgar Benedicto Zamora Guerrero, Citlally Janinne Vargas Martínez, Karen Fernanda Tonchez Pérez, Gerardo Nicolas Rodríguez Araujo, Enrique Cevada Maya
  • Patent number: 11920092
    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 kgL·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.
    Type: Grant
    Filed: May 17, 2023
    Date of Patent: March 5, 2024
    Assignee: INSTITUTO MEXICANO DEL PETROLEO
    Inventors: 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
  • Publication number: 20240002736
    Abstract: The present disclosure is related to novel random terpolymers of alkyl-acrylate, carboxyalkyl-acrylate, and alkoxyalkyl-acrylate, and to processes for their preparation, and processes for their use as dehydrating-desalting agents of crude oil, particularly, their use as destabilizers of water-in-crude oil (W/O) emulsions, including their use to remove water and salts dissolved in crude oils with gravities between around 10 and around 40° API.
    Type: Application
    Filed: December 15, 2022
    Publication date: January 4, 2024
    Inventors: César Andrés Flores Sandoval, Flavio Salvador Vázquez Moreno, Gerardo Zavala Olivares, Fernando Álvarez Ramírez, Edgar Benedicto Zamora Guerrero, Jessica Valeria Fuentes Santiago, Citlally Janinne Vargas Martínez, Gerardo Nicolas Rodríguez Araujo, Enrique Cevada Maya
  • Publication number: 20230348707
    Abstract: The present disclosure provide bipolymers, based on alkyl acrylate and hydroxyalkyl acrylate, with high randomness and controlled molecular mass, that are useful as demulsifying and dehydrating agents for crude oil. The synthesis of these bipolymers is carried out in a single stage by emulsion polymerization, a process that, in addition to having moderate reaction conditions, allows the control of the homogeneity of the chain size, the molecular mass, and the demulsifying efficiency. These random bipolymers are soluble in organic phase; therefore, these cannot be carried away by the removed water, and are eliminated in the atmospheric distillation stage. An additional advantage is the superior demulsifying and clarifying efficiency of these random bipolymers compared with the polyether formulations widely used at industrial level.
    Type: Application
    Filed: December 6, 2022
    Publication date: November 2, 2023
    Inventors: César Andrés Flores Sandoval, Flavio Salvador Vázquez Moreno, Gerardo Zavala Olivares, Fernando Álvarez Ramírez, Jessica Valeria Fuentes Santiago, Edgar Benedicto Zamora Guerrero, Enrique Cevada Maya
  • Publication number: 20230287279
    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 kgL·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.
    Type: Application
    Filed: May 17, 2023
    Publication date: September 14, 2023
    Inventors: 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
  • Patent number: 11692144
    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.
    Type: Grant
    Filed: November 16, 2020
    Date of Patent: July 4, 2023
    Assignee: INSTITUTO MEXICANO DEL PETROLEO
    Inventors: 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
  • Publication number: 20230029640
    Abstract: The present disclosure refers to the development of novel random bipolymers, which are comprised of alkyl acrylate and alkoxy alkyl acrylate monomers, as hydrophobic and hydrophilic components, respectively. These bipolymers are synthesized by means of semi-continuous emulsion polymerization, under strict conditions of monomer deficiency, to ensure the randomness and homogeneity of the chains. The application in dissolution of these random bipolymers has shown a dehydrating capacity superior to that of polyethers and phenolic resins, with the additional advantage of being soluble in crude oil. The random bipolymers show excellent performance as breakers of water-in-crude oil emulsions, coalescers of water droplets and clarifiers of the removed aqueous phase, and are chemically stable under acidic conditions.
    Type: Application
    Filed: February 23, 2022
    Publication date: February 2, 2023
    Inventors: César Andrés Flores Sandoval, Flavio Salvador Vázquez Moreno, Gerardo Zavala Olivares, Jessica Valeria Fuentes Santiago, Edgar Benedicto Zamora Guerrero, Enrique Cevada Maya
  • Publication number: 20220135886
    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.
    Type: Application
    Filed: November 16, 2020
    Publication date: May 5, 2022
    Inventors: 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
  • Publication number: 20220106530
    Abstract: 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.
    Type: Application
    Filed: October 5, 2021
    Publication date: April 7, 2022
    Inventors: César Andrés Flores Sandoval, Flavio Salvador Vázquez Moreno, Fernando Alvarez Ramírez, Gerardo Zavala Olivares, Citlally Janinne Vargas Martínez, Jessica Valeria Fuentes Santiago, Edgar Benedicto Zamora Guerrero, Enrique Cevada Maya, Erika Gómez Buendía
  • Patent number: 11261282
    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, ?-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.
    Type: Grant
    Filed: May 1, 2020
    Date of Patent: March 1, 2022
    Assignee: INSTITUTO MEXICANO DEL PETROLEO
    Inventors: 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
  • Publication number: 20210277314
    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.
    Type: Application
    Filed: June 29, 2020
    Publication date: September 9, 2021
    Inventors: 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
  • Patent number: 11014875
    Abstract: The present disclosure is related to obtaining and using sulfobetaine and hydroxysultaine-based geminal zwitterionic liquids as wettability modifiers for rocks such as limestone, dolomite, sandstone, quartz or heterogeneous lithologies, under the presence of brines having high content of divalent ions as calcium, magnesium, barium and strontium, at high temperature and high pressure conditions for enhanced oil recovery processes to increase the oil production. The geminal zwitterionic liquids of the present disclosure have also the property of acting as corrosion inhibitors of ferrous metals used in pipelines and equipment for crude oil extraction, production, transport and storage operations. A further advantage shown by zwitterionic liquids derived from their molecular structure is they can be dissolved in distilled water, brine, hydrocarbon solvents, aromatics and alcohols.
    Type: Grant
    Filed: November 27, 2015
    Date of Patent: May 25, 2021
    Assignee: INSTITUTO MEXICANO DEL PETROLEO
    Inventors: Raül Hernandez Altamirano, Violeta Yasmin Mena Cervantes, Luis Silvestre Zamudio Rivera, César Andrés Flores Sandoval, Alejandro Ramírez Estrada, Rodolfo Cisneros Devora, José Manuel Martínez Magadan, Raúl Oviedo Roa, Jorge Francisco Ramírez Pérez
  • Publication number: 20210147595
    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.
    Type: Application
    Filed: January 12, 2021
    Publication date: May 20, 2021
    Inventors: 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
  • Patent number: 10982031
    Abstract: The present invention is related to the application of terpolymers based on alkyl acrylates as defoamers of gasified crude oils, with densities between 10 and 40° API. The evaluation of terpolymers based on alkyl acrylates at conditions similar to those of gas-liquid separators has shown that the terpolymers are efficient as inhibitors of the foam formation in heavy and super-heavy crude oil, abating the foam between 15 and 50% faster than in non-dosed crude oil (blank). Even some acrylic terpolymers exhibited a greater efficiency as defoamers than that of commercial silicon-based polymers, which promoting the defoaming only 20-25% faster than the blank collapse. The employ of silicones as defoamers presents serious problems as the formation of deposits and the deactivation of catalysts in the refining processes. This situation has provoked that refineries in Mexico and a worldwide ban the application of this kind of inorganic polymers, and new silicon-free defoaming agents are required.
    Type: Grant
    Filed: March 31, 2017
    Date of Patent: April 20, 2021
    Assignee: INSTITUTO MEXICANO DEL PETROLEO
    Inventors: Edgar Iván Hernández Carbajal, Alfonso López Ortega, César Andrés Flores Sandoval, Fernando Alvarez Ramírez, Juan de la Cruz Clavel López, Flavio Salvador Vázquez Moreno, Enrique Cevada Maya
  • Patent number: 10975185
    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; 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.
    Type: Grant
    Filed: October 6, 2017
    Date of Patent: April 13, 2021
    Assignee: INSTITUTO MEXICANO DEL PETROLEO
    Inventors: Edgar Iván Hernández 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
  • Publication number: 20200347173
    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, ?-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.
    Type: Application
    Filed: May 1, 2020
    Publication date: November 5, 2020
    Inventors: 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
  • Patent number: 10793783
    Abstract: 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.
    Type: Grant
    Filed: August 22, 2018
    Date of Patent: October 6, 2020
    Assignee: Instituto Mexicano del Petroleo
    Inventors: 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
  • Publication number: 20190276750
    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.
    Type: Application
    Filed: August 22, 2018
    Publication date: September 12, 2019
    Inventors: 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
  • Patent number: 10221349
    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.
    Type: Grant
    Filed: July 13, 2016
    Date of Patent: March 5, 2019
    Assignee: INSTITUTO MEXICANO DEL PETROLEO
    Inventors: Edgar Ivan Hernandez Carbajal, Enrique Cevada Maya, Alfonso Lopez Ortega, Cesar Andres Flores Sandoval, Fernando Alvarez Ramirez, Arquimedes Estrada Martinez, Flavio Salvador Vazquez Moreno