Patents by Inventor Enrique CEVADA MAYA
Enrique CEVADA MAYA 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).
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Patent number: 11920092Abstract: 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: GrantFiled: May 17, 2023Date of Patent: March 5, 2024Assignee: INSTITUTO MEXICANO DEL PETROLEOInventors: 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
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Publication number: 20240002736Abstract: 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: ApplicationFiled: December 15, 2022Publication date: January 4, 2024Inventors: 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
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Publication number: 20230348707Abstract: 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: ApplicationFiled: December 6, 2022Publication date: November 2, 2023Inventors: 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
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Publication number: 20230287279Abstract: 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: ApplicationFiled: May 17, 2023Publication date: September 14, 2023Inventors: 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
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Patent number: 11692144Abstract: 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: GrantFiled: November 16, 2020Date of Patent: July 4, 2023Assignee: INSTITUTO MEXICANO DEL PETROLEOInventors: 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
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Publication number: 20230029640Abstract: 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: ApplicationFiled: February 23, 2022Publication date: February 2, 2023Inventors: César Andrés Flores Sandoval, Flavio Salvador Vázquez Moreno, Gerardo Zavala Olivares, Jessica Valeria Fuentes Santiago, Edgar Benedicto Zamora Guerrero, Enrique Cevada Maya
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Publication number: 20220135886Abstract: 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: ApplicationFiled: November 16, 2020Publication date: May 5, 2022Inventors: 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
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Publication number: 20220106530Abstract: 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: ApplicationFiled: October 5, 2021Publication date: April 7, 2022Inventors: 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
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Patent number: 10982031Abstract: 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: GrantFiled: March 31, 2017Date of Patent: April 20, 2021Assignee: INSTITUTO MEXICANO DEL PETROLEOInventors: 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
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Patent number: 10221349Abstract: 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: GrantFiled: July 13, 2016Date of Patent: March 5, 2019Assignee: INSTITUTO MEXICANO DEL PETROLEOInventors: Edgar Ivan Hernandez Carbajal, Enrique Cevada Maya, Alfonso Lopez Ortega, Cesar Andres Flores Sandoval, Fernando Alvarez Ramirez, Arquimedes Estrada Martinez, Flavio Salvador Vazquez Moreno
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Patent number: 10213708Abstract: 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.Type: GrantFiled: December 4, 2014Date of Patent: February 26, 2019Assignee: INSTITUTO MEXICANO DEL PETROLEOInventors: 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
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Publication number: 20170283534Abstract: 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: ApplicationFiled: March 31, 2017Publication date: October 5, 2017Applicant: INSTITUTO MEXICANO DEL PETRÓLEOInventors: 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
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Publication number: 20170015897Abstract: 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: ApplicationFiled: July 13, 2016Publication date: January 19, 2017Inventors: Edgar Ivan HERNANDEZ CARBAJAL, Enrique CEVADA MAYA, Alfonso LOPEZ ORTEGA, Cesar Andres FLORES SANDOVAL, Fernando ALVAREZ RAMIREZ, Arquimedes ESTRADA MARTINEZ, Flavio Salvador VAZQUEZ MORENO
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Publication number: 20150157961Abstract: 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.Type: ApplicationFiled: December 4, 2014Publication date: June 11, 2015Inventors: Enrique CEVADA MAYA, Laura Veronica CASTRO SOTELO, Edgar Ivan HERNANDEZ RAMIREZ, Cesar Andres FLORES SANDOVAL, Alfonso LOPEZ ORTEGA, Aristeo ESTRADA BUENDIA, Fernando ALVAREZ RAMIREZ, Arquimedes ESTRADA MARTINEZ, Flavio Salvador VAZQUEZ MORENO