Patents by Inventor Syed A. Ahmed
Syed A. Ahmed 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: 20180361365Abstract: Embodiments of zeolite composite catalysts and methods of producing the zeolite composite catalysts are provided, where the methods comprise dissolving in an alkaline solution a catalyst precursor comprising at least one mesoporous zeolite while heating, stirring, or both to yield a dissolved zeolite solution, where the mesoporous zeolite has a molar ratio of SiO2/Al2O3 of at least 30, where the mesoporous zeolite comprises zeolite beta, adjusting the pH of the dissolved zeolite solution, aging the pH adjusted dissolved zeolite solution to yield solid zeolite composite from the dissolved zeolite solution, and calcining the solid zeolite composite to produce the zeolite composite catalyst, where the zeolite composite catalyst has a mesostructure comprising at least one disordered mesophase and at least one ordered mesophase, and where the zeolite composite catalyst has a surface area defined by the Brunauer—Emmett—Teller (BET) analysis of at least 600 m2/g.Type: ApplicationFiled: June 15, 2017Publication date: December 20, 2018Applicants: King Fahd University of Petroleum and Minerals, Saudi Arabian Oil CompanyInventors: Balasamy Rabindran Jermy, Syed Ahmed Ali, Raed Hasan Abudawoud, Abdullah Mohammed Aitani, Sulaiman Saleh Al-Khattaf
-
Patent number: 10150106Abstract: A method of preparing a metal-doped zeolite catalyst with a modified topology (e.g. a pillared zeolite or a delaminated zeolite), and a method of using thereof in a process for converting an alkyl-aromatic hydrocarbon stream to BTX (benzene/toluene/xylene), wherein an enhanced pore topology in the metal-doped zeolite catalyst determines a selectivity to transalkylation of trimethylbenzene to xylene, which in turn leads to a higher xylene yield. Various embodiments of the method of preparing the metal-doped zeolite catalyst, and the process for converting the alkyl-aromatic hydrocarbon stream to BTX are also provided.Type: GrantFiled: September 6, 2018Date of Patent: December 11, 2018Assignee: KING FAHD UNIVERSITY OF PETROLEUM AND MINERALSInventors: Sulaiman Saleh Al-Khattaf, Syed Ahmed Ali, Abdullah Mohammed Aitani
-
Patent number: 10080600Abstract: An elongated electrode includes a proximal conductor, a tubular member, and a treatment portion. The tubular member defines a channel therethrough and has proximal and distal end portions. The proximal end portion receives the proximal conductor within a portion of the channel and defines a hole through an inner and outer surface of the tubular member in fluid communication with the channel. The treatment portion is coupled to the distal end portion of the tubular member and includes a base and an arm extending distally from the base. The base defines a port in fluid communication with the channel of the tubular member. The arm is in electrical communication with the proximal conductor and is configured to deliver electrosurgical energy to tissue.Type: GrantFiled: January 21, 2015Date of Patent: September 25, 2018Assignee: COVIDIEN LPInventors: Amarsinh D. Jadhav, Mushtaque Syed Ahmed
-
Publication number: 20180257064Abstract: A method of preparing a metal-doped zeolite catalyst with a modified topology (e.g. a pillared zeolite or a delaminated zeolite), and a method of using thereof in a process for converting an alkyl-aromatic hydrocarbon stream to BTX (benzene/toluene/xylene), wherein an enhanced pore topology in the metal-doped zeolite catalyst determines a selectivity to transalkylation of trimethylbenzene to xylene, which in turn leads to a higher xylene yield. Various embodiments of the method of preparing the metal-doped zeolite catalyst, and the process for converting the alkyl-aromatic hydrocarbon stream to BTX are also provided.Type: ApplicationFiled: May 9, 2018Publication date: September 13, 2018Applicant: KING FAHD UNIVERSITY OF PETROLEUM AND MINERALSInventors: Sulaiman Saleh Al-Khattaf, Syed Ahmed Ali, Abdullah Mohammed Aitani
-
Patent number: 10040052Abstract: The composite adsorbent for an adsorption chiller is a composite material formed from multi-walled carbon nanotubes incorporated into a metal organic framework, where the metal organic framework is MIL-101(Cr). The MIL-101 family of metal organic frameworks include terephthalate (benzene 1,4-dicarboxylate) linkers and M3O-carboxylate trimers (M=Cr or Fe) with octrahedrally coordinated metal ions binding terminal water molecules. MIL-101 frameworks having a crystal structure with very large pore sizes (29 and 34 Angstroms) and surface area, and are known to have a large water uptake. However, metal organic frameworks have low thermal conductivity due to the presence of organic matter, resulting in lower heat transfer rates and greater cycle time, and are not stable in aqueous media or disintegrate slowly upon recurrent hydrothermal cycling. Composite binding with multi-wall carbon nanotubes improves heat transfer characteristics and thermal stability.Type: GrantFiled: February 18, 2016Date of Patent: August 7, 2018Assignee: KING FAHD UNIVERSITY OF PETROLEUM AND MINERALSInventors: Syed Ahmed Mohammed Said, Rached Ben Mansour, Najam Ul Qadir
-
Patent number: 10035140Abstract: A method of preparing a metal-doped zeolite catalyst with a modified topology (e.g. a pillared zeolite or a delaminated zeolite), and a method of using thereof in a process for converting an alkyl-aromatic hydrocarbon stream to BTX (benzene/toluene/xylene), wherein an enhanced pore topology in the metal-doped zeolite catalyst determines a selectivity to transalkylation of trimethylbenzene to xylene, which in turn leads to a higher xylene yield. Various embodiments of the method of preparing the metal-doped zeolite catalyst, and the process for converting the alkyl-aromatic hydrocarbon stream to BTX are also provided.Type: GrantFiled: September 20, 2016Date of Patent: July 31, 2018Assignee: King Fahd University of Petroleum and MineralsInventors: Sulaiman Saleh Al-Khattaf, Syed Ahmed Ali, Abdullah Mohammed Aitani
-
Patent number: 10023813Abstract: A process for producing an unsupported molybdenum sulfide nanocatalyst comprising atomizing a molybdenum oxide solution to form a molybdenum oxide aerosol, pyrolyzing the molybdenum oxide aerosol with a laser beam to form the unsupported molybdenum-based nanocatalyst, and pre-sulfiding at least a portion of the unsupported molybdenum-based nanocatalyst to form an unsupported molybdenum sulfide nanocatalyst, wherein the unsupported molybdenum-based nanocatalyst, the unsupported molybdenum sulfide catalyst or both are in the form of nanoparticles with a diameter of 1-10 nm and in a distorted rutile crystalline structure. A method of selective deep hydrodesulfurization whereby a hydrocarbon feedstock having at least one sulfur-containing component and at least one hydrocarbon is contacted with the unsupported molybdenum sulfide nanocatalyst.Type: GrantFiled: June 23, 2016Date of Patent: July 17, 2018Assignees: KING FAHD UNIVERSITY OF PETROLEUM AND MINERALS, COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVESInventors: Zain Hassan Yamani, Nouar Tabet, Syed Ahmed Ali, Yann Leconte, Frederic Schuster, Axelle Quinsac
-
Publication number: 20180078929Abstract: A method of preparing a metal-doped zeolite catalyst with a modified topology (e.g. a pillared zeolite or a delaminated zeolite), and a method of using thereof in a process for converting an alkyl-aromatic hydrocarbon stream to BTX (benzene/toluene/xylene), wherein an enhanced pore topology in the metal-doped zeolite catalyst determines a selectivity to transalkylation of trimethylbenzene to xylene, which in turn leads to a higher xylene yield. Various embodiments of the method of preparing the metal-doped zeolite catalyst, and the process for converting the alkyl-aromatic hydrocarbon stream to BTX are also provided.Type: ApplicationFiled: September 20, 2016Publication date: March 22, 2018Applicant: KING FAHD UNIVERSITY OF PETROLEUM AND MINERALSInventors: Sulaiman Saleh AL-KHATTAF, Syed Ahmed ALI, Abdullah Mohammed AITANI
-
Publication number: 20180021159Abstract: A gastric calibration tube includes a flexible elongate member, a pushing member, and a balloon member. The flexible elongate member has a proximal end portion, a distal end portion, and an outer surface that extends between the proximal and distal end portions. The outer surface defines a side opening. The flexible elongate member defines a lumen that is in communication with the side opening. The pushing member has a proximal portion and a distal portion. The distal portion is advanceable through the lumen of the flexible elongate member and out of the side opening of the flexible elongate member. The balloon member is secured to one or both of the flexible elongate member and the pushing member. The balloon member is inflatable to fix the gastric calibration tube within a patient's stomach.Type: ApplicationFiled: October 3, 2017Publication date: January 25, 2018Inventors: Rajat R. Rokde, Mushtaque Syed Ahmed, Jeetendra S. Bharadwaj
-
Publication number: 20170369792Abstract: A process for producing an unsupported molybdenum sulfide nanocatalyst comprising atomizing a molybdenum oxide solution to form a molybdenum oxide aerosol, pyrolyzing the molybdenum oxide aerosol with a laser beam to form the unsupported molybdenum-based nanocatalyst, and pre-sulfiding at least a portion of the unsupported molybdenum-based nanocatalyst to form an unsupported molybdenum sulfide nanocatalyst, wherein the unsupported molybdenum-based nanocatalyst, the unsupported molybdenum sulfide catalyst or both are in the form of nanoparticles with a diameter of 1-10 nm and in a distorted rutile crystalline structure. A method of selective deep hydrodesulfurization whereby a hydrocarbon feedstock having at least one sulfur-containing component and at least one hydrocarbon is contacted with the unsupported molybdenum sulfide nanocatalyst.Type: ApplicationFiled: June 23, 2016Publication date: December 28, 2017Applicants: KING FAHD UNIVERSITY OF PETROLEUM AND MINERALS, COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVESInventors: Zain Hassan YAMANI, Nouar Tabet, Syed Ahmed Ali, Yann Leconte, Frederic Schuster, Axelle Quinsac
-
Publication number: 20170328613Abstract: An intermittent operation based continuous absorption system (IOBCAS) which supports cooling effect during the daytime without the use of a solution pump is provided. The IOBCAS may utilize an isochoric process for pressurization of the system and the system may include a plurality of generator-absorber units that intermittently operate in succession to provide a continuous refrigeration cooling effect during the daytime. The system of the present disclosure enables the plurality of generator-absorber units to switch between a generation, absorption, and heat recovery mode of operation to provide cooling effect during the daytime which a higher coefficient of performance compared with conventional intermittent system.Type: ApplicationFiled: August 2, 2017Publication date: November 16, 2017Applicant: KING FAHD UNIVERSITY OF PETROLEUM AND MINERALSInventors: Syed Ahmed Mohammad SAID, Muhammad Umar SIDDIQUI
-
Patent number: 9776861Abstract: A convectively heated steam/methane reformer having a shell and tube reforming reactor for hydrogen production. A reactor core containing the reactants is convectively heated by hot air flowing through the shell or annulus of the reactor. Heated air is supplied to the reactor through several fluid inlets on the shell side of the reformer.Type: GrantFiled: June 1, 2017Date of Patent: October 3, 2017Assignee: King Fahd University of Petroleum and MineralsInventors: Syed Ahmed Mohammed Said, Shakeel Ahmed, Mohammed Waseeuddin
-
Patent number: 9775735Abstract: A gastric calibration tube includes a flexible elongate member, a pushing member, and a balloon member. The flexible elongate member has a proximal end portion, a distal end portion, and an outer surface that extends between the proximal and distal end portions. The outer surface defines a side opening. The flexible elongate member defines a lumen that is in communication with the side opening. The pushing member has a proximal portion and a distal portion. The distal portion is advanceable through the lumen of the flexible elongate member and out of the side opening of the flexible elongate member. The balloon member is secured to one or both of the flexible elongate member and the pushing member. The balloon member is inflatable to fix the gastric calibration tube within a patient's stomach.Type: GrantFiled: January 31, 2014Date of Patent: October 3, 2017Assignee: Covidien LPInventors: Rajat R. Rokde, Mushtaque Syed Ahmed, Jeetendra S. Bharadwaj
-
Patent number: 9772128Abstract: An intermittent operation based continuous absorption system (IOBCAS) which supports cooling effect during the daytime without the use of a solution pump is provided. The IOBCAS may utilize an isochoric process for pressurization of the system and the system may include a plurality of generator-absorber units that intermittently operate in succession to provide a continuous refrigeration cooling effect during the daytime. The system of the present disclosure enables the plurality of generator-absorber units to switch between a generation, absorption, and heat recovery mode of operation to provide cooling effect during the daytime which a higher coefficient of performance compared with conventional intermittent system.Type: GrantFiled: April 3, 2014Date of Patent: September 26, 2017Assignee: King Fahd University of Petroleum and MineralsInventors: Syed Ahmed Mohammad Said, Muhammad Umar Siddiqui
-
Publication number: 20170260047Abstract: A convectively heated steam/methane reformer having a shell and tube reforming reactor for hydrogen production. A reactor core containing the reactants is convectively heated by hot air flowing through the shell or annulus of the reactor. Heated air is supplied to the reactor through several fluid inlets on the shell side of the reformer.Type: ApplicationFiled: June 1, 2017Publication date: September 14, 2017Applicant: KING FAHD UNIVERSITY OF PETROLEUM AND MINERALSInventors: Syed Ahmed Mohammed SAID, Shakeel Ahmed, Mohammed Waseeuddin
-
Publication number: 20170239643Abstract: The composite adsorbent for an adsorption chiller is a composite material formed from multi-walled carbon nanotubes incorporated into a metal organic framework, where the metal organic framework is MIL-101(Cr). The MIL-101 family of metal organic frameworks include terephthalate (benzene 1,4-dicarboxylate) linkers and M3O-carboxylate trimers (M=Cr or Fe) with octrahedrally coordinated metal ions binding terminal water molecules. MIL-101 frameworks having a crystal structure with very large pore sizes (29 and 34 Angstroms) and surface area, and are known to have a large water uptake. However, metal organic frameworks have low thermal conductivity due to the presence of organic matter, resulting in lower heat transfer rates and greater cycle time, and are not stable in aqueous media or disintegrate slowly upon recurrent hydrothermal cycling. Composite binding with multi-wall carbon nanotubes improves heat transfer characteristics and thermal stability.Type: ApplicationFiled: February 18, 2016Publication date: August 24, 2017Inventors: SYED AHMED MOHAMMED SAID, RACHED BEN MANSOUR, NAJAM UL QADIR
-
Patent number: 9708186Abstract: A convectively heated steam/methane reformer having a shell and tube reforming reactor for hydrogen production. A reactor core containing the reactants is convectively heated by hot air flowing through the shell or annulus of the reactor. Heated air is supplied to the reactor through several fluid inlets on the shell side of the reformer.Type: GrantFiled: September 4, 2015Date of Patent: July 18, 2017Assignee: King Fahd University of Petroleum and MineralsInventors: Syed Ahmed Mohammed Said, Shakeel Ahmed, Mohammed Waseeuddin
-
Patent number: 9701536Abstract: A convectively heated steam/methane reformer having a shell and tube reforming reactor for hydrogen production. A reactor core containing the reactants is convectively heated by hot air flowing through the shell or annulus of the reactor. Heated air is supplied to the reactor through several fluid inlets on the shell side of the reformer.Type: GrantFiled: September 4, 2015Date of Patent: July 11, 2017Assignee: King Fahd University of Petroleum and MineralsInventors: Syed Ahmed Mohammed Said, Shakeel Ahmed, Mohammed Waseeuddin
-
Patent number: 9586873Abstract: A method is disclosed for selective simultaneous production of para-xylene, para-ethyltoluene and para-diethylbenzene from a reactant stream containing ethylbenzene and methanol, as an alkylating agent. The process comprises alkylation of the feedstock in a fluidized-bed rector under alkylating conditions, over a modified ZSM-5-based catalyst to produce streams containing above 95% para-isomers of dialkylbenzenes. The method also includes the steps of multilayer silylation to achieve simultaneous selectivity of the para-isomers of dialkylbenzenes.Type: GrantFiled: June 3, 2014Date of Patent: March 7, 2017Assignee: King Fahd University of Petroleum and MineralsInventors: Sulaiman Saleh Al-Khattaf, Syed Ahmed Ali, Abdullah Mohammed Aitani
-
Publication number: 20160346110Abstract: A gastric tube for use in a bariatric procedure includes an elongate tube and a cannulated plug coupled to the elongate tube. The elongate tube has a proximal end portion and a distal end portion. The elongate tube defines a lumen along a length thereof. The proximal end portion defines an opening in communication with the lumen. The elongate tube includes a blunt tip and an outer surface. The blunt tip is formed on the distal end portion. The outer surface defines a side opening in communication with the lumen. The cannulated plug includes a proximal end and a distal end. The proximal end is configured for connection to a vacuum source. The distal end is configured for removable receipt in the opening of the proximal end portion of the elongate tube to control a flow of one of aspiration and irrigation through the lumen.Type: ApplicationFiled: August 10, 2016Publication date: December 1, 2016Inventors: Rajat Rokde, Syed Ahmed Mushtaque, Jeetendra Bharadwaj