Patents by Inventor Abdulaziz A Bagabas
Abdulaziz A Bagabas 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: 8945503Abstract: A method of forming CuFeS2 chalcopyrite nanoparticles. The method includes, in the presence of one or more ligands, reacting an iron-containing compound, a copper-containing compound and a sulfur-containing compound to form CuFeS2 chalcopyrite nanoparticles; and wherein at least one of the ligands forms a coordination complex with copper, and at least one of the ligands forms a coordination complex with iron. Also a method of forming metal-doped CuFeS2 chalcopyrite nanoparticles such as Zn-doped CuFeS2 chalcopyrite nanoparticles. Also, a CuFeS2 chalcopyrite nanoparticle layer on a substrate. Also, a composition of matter including Zn-doped CuFeS2 chalcopyrite nanoparticles. Also, a Zn-doped CuFeS2 chalcopyrite nanoparticle layer on a substrate.Type: GrantFiled: August 22, 2011Date of Patent: February 3, 2015Assignees: International Business Machines Corporation, King Abdulaziz City for Science and TechnologyInventors: Xin Ai, Abdulaziz Bagabas, Mohammed Bahattab, John D. Bass, Robert D. Miller, John Campbell Scott, Qing Song
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Publication number: 20140179950Abstract: A method for direct synthesis of adipic acid (AA) adopting green catalytic oxidation route of cyclohexane (CH) using the bimetallic catalysts is described. The reaction to convert CH into AA in the presence of bimetallic catalyst is carried in an autoclave in the temperature range of 25 to 300° C. The CH conversion was over 21% with AA selectivity of 34% and ca. 63% selectivity of cyclohexanone and cyclohexanol together over Au—Pd/TiO2 bimetallic catalyst.Type: ApplicationFiled: March 3, 2014Publication date: June 26, 2014Applicant: King Abdulaziz City for Science and Technology (KACST)Inventors: Ahmad S. ALSHAMMARI, Abdulaziz A. BAGABAS, Angela KÖCKRITZ, Venkata Narayana KALEVARU, Andreas MARTIN
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Patent number: 8623220Abstract: A simple, room-temperature method of producing CuO-doped zinc oxide nanoparticles was established by reacting zinc nitrate hexahydrate, copper nitrate trihydrate and cyclohexylamine (CHA) at room temperature. These nanoparticles may be used for photocatalytic degradation of cyanide in aqueous solutions. The degradation of cyanide is effective because electrons transfer from the p-type copper oxide to the n-type zinc oxide.Type: GrantFiled: July 13, 2012Date of Patent: January 7, 2014Assignee: King Abdulaziz City for Science and Technology (KACST)Inventors: Abdulaziz A Bagabas, Ahmed S. Alshammari, Mohamed F. Aboud, Mohamed Mokhtar Mohamed Mostafa, Emad Addurihem, Zeid A. Al-Othman, Musaed A Alangari
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Publication number: 20130296604Abstract: A bimetallic catalyst supported on a transition metal oxide is described. A method to make and use the bimetallic catalyst is also described. A method for preparing supported bimetallic catalysts of coinage group metal and a combination of a coinage group metal and a platinum metal group is described. A method for direct synthesis of adipic acid (AA) adopting green catalytic oxidation route of cyclohexane (CH) using the bimetallic catalysts is described. The reaction to convert CH into AA in the presence of bimetallic catalyst is carried in an autoclave in the temperature range of 25 to 300° C. The CH conversion was over 21% with AA selectivity of 34% and ca. 63% selectivity of cyclohexanone and cyclohexanol together over Au—Pd/TiO2 bimetallic catalyst.Type: ApplicationFiled: May 4, 2012Publication date: November 7, 2013Applicant: King Absulaziz City for Science and Technology (KACST)Inventors: Ahmad S. ALSHAMMARI, Abdulaziz A. BAGABAS, Angela KÖCKRITZ, Venkata Narayana KALEVARU, Andreas MARTIN
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Publication number: 20130168328Abstract: A simple, room-temperature method of producing CuO-doped zinc oxide nanoparticles was established by reacting zinc nitrate hexahydrate, copper nitrate trihydrate and cyclohexylamine (CHA) at room temperature. These nanoparticles may be used for photocatalytic degradation of cyanide in aqueous solutions. The degradation of cyanide is effective because electrons transfer from the p-type copper oxide to the n-type zinc oxide.Type: ApplicationFiled: July 13, 2012Publication date: July 4, 2013Applicant: King Abdulaziz City for Science and Technology (KACST)Inventors: ABDULAZIZ A. BAGABAS, Ahmed S. ALSHAMMARI, Mohamed F. Aboud, Mohamed Mokhtar Mohamed Mostafa, EMAD ADDURIHEM, Zeid A. AL-Othman, MUSAED A. ALANGARI
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Patent number: 8388923Abstract: Methods and systems of preparing a catalyst to be used in the synthesis of carbon nanotubes through Chemical Vapor Depositions are disclosed. The method may include a mixture comprising at least one of an iron catalyst source and a catalyst support. In another aspect, a method of synthesizing multi-walled carbon nanotubes using the catalyst is disclosed. The method may include driving a reaction in a CVD furnace and generating at least one multi-walled carbon nanotube through the reaction. The method also includes depositing the catalyst on the CVD furnace and driving a carbon source with a carrier gas to the CVD furnace. The method further includes decomposing the carbon source in the presence of the catalyst under a sufficient gas pressure for a sufficient time to grow at least one multi-walled carbon nanotube.Type: GrantFiled: March 9, 2012Date of Patent: March 5, 2013Assignee: King Abdulaziz City for Science and TechnologyInventors: Mohammed Abdullah Bahattab, Abdulaziz A Bagabas, Ibrahim M Al-Najjar
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Publication number: 20130052353Abstract: A method of forming CuFeS2 chalcopyrite nanoparticles. The method includes, in the presence of one or more ligands, reacting an iron-containing compound, a copper-containing compound and a sulfur-containing compound to form CuFeS2 chalcopyrite nanoparticles; and wherein at least one of the ligands forms a coordination complex with copper, and at least one of the ligands forms a coordination complex with iron. Also a method of forming metal-doped CuFeS2 chalcopyrite nanoparticles such as Zn-doped CuFeS2 chalcopyrite nanoparticles. Also, a CuFeS2 chalcopyrite nanoparticle layer on a substrate. Also, a composition of matter including Zn-doped CuFeS2 chalcopyrite nanoparticles. Also, a Zn-doped CuFeS2 chalcopyrite nanoparticle layer on a substrate.Type: ApplicationFiled: August 22, 2011Publication date: February 28, 2013Applicants: KING ABDULAZIZ CITY FOR SCIENCE AND TECHNOLOGY, INTERNATIONAL BUSINESS MACHINES CORPORATIONInventors: Xin Ai, Abdulaziz Bagabas, Mohammed Bahattab, John D. Bass, Robert D. Miller, Campbell J. Scott, Qing Song
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Patent number: 8362094Abstract: A simple, room-temperature method of producing zinc oxide nanoparticles was established by reacting zinc nitrate hexahydrate and cyclohexylamine (CHA) in either aqueous or ethanolic medium. Particles of polyhedra morphology were obtained for zinc oxide, prepared in EtOH (ZnOE) and zinc oxide prepared in water (ZnOW). The results indicate that there are significant morphological differences between ZnOE and ZnOW. ZnOE showed a regular polyhedral shape, while spherical and chunky particles were observed for ZnOW. The morphology was crucial in enhancing the cyanide ion photocatalytic degradation efficiency of ZnOE by a factor of 1.5 in comparison to the efficiency of ZnOW at equivalent loading of 0.0166 ZnO nanoparticles wt %.Type: GrantFiled: July 30, 2012Date of Patent: January 29, 2013Assignee: King Abdulaziz City for Science and Technology (KACST)Inventors: Abdulaziz A Bagabas, Reda M. Mohamed, Mohamed F. A. Aboud, Mohamed Mokhtar M. Mostafa, Ahmad S. Alshammari, Zeid A. Al-Othman
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Patent number: 8362302Abstract: Isopropyl alcohol is a very useful chemical that is widely used in the industry as a solvent. Economical and easy process to make ispopropyl alcohol using novel composite catalyst is described in the instant application. Production of isopropyl alcohol (IPA) from dimehtyl ketone (DMK) and hydrogen (H2) in gas-phase using a ruthenium nano-particle-supported on activated charcoal/nano-zinc oxide composite catalyst is described. Gas phase production of isopropyl alcohol using DMK and hydrogen is also described using optimal time on stream, temperature, catalyst ratio and DMK/H2 ratio. Ruthenium nano-zinc oxide composite catalyst is formulated using different ratios of ruthenium activated charcoal and n-ZnO is described. CAT-IV is shown to be the best performer for the efficient production of isopropyl alcohol.Type: GrantFiled: April 16, 2012Date of Patent: January 29, 2013Assignee: King Abdulaziz City for Science and Technology (KACST)Inventors: Abdulaziz A Bagabas, Mohamed Mokhtar Mohamed Mostafa, Abdulrahman A Al-Rabiah, Vagif Malik Akhmedov
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Patent number: 8361324Abstract: A simple, room-temperature process of using zinc oxide nanoparticles was established by reacting zinc nitrate hexahydrate and cyclohexylamine (CHA) in either aqueous or ethanol medium. Particles of polyhedra morphology were obtained for zinc oxide, prepared in EtOH (ZnOE) and zinc oxide prepared in water (ZnOW). The results indicate that there are significant morphological differences between ZnOE and ZnOW. ZnOE showed a regular polyhedral shape, while spherical and chunky particles were observed for ZnOW. The morphology was crucial in enhancing the cyanide ion photocatalytic degradation efficiency of ZnOE by a factor of 1.5 in comparison to the efficiency of ZnOW at equivalent loading of 0.0166 ZnO nanoparticles wt %.Type: GrantFiled: July 30, 2012Date of Patent: January 29, 2013Assignee: King Abdulaziz City for Science and Technology (KACST)Inventors: Abdulaziz A Bagabas, Reda M. Mohamed, Mohamed F. A. Aboud, Mohamed Mokhtar M. Mostafa, Ahmad S. Alshammari, Zeid A. AL-Othman
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Patent number: 8252256Abstract: A simple, room-temperature method of producing zinc oxide nanoparticles was established by reacting zinc nitrate hexahydrate and cyclohexylamine (CHA) in either aqueous or EtOHic medium. Particles of polyhedra morphology were obtained for zinc oxide, prepared in EtOH (ZnOE), while an irregular spherical morphology, mixed with some chunky particles forzinc oxide prepared in water (ZnOW). The results indicate that there are significant morphological differences between ZnOE and ZnOW. ZnOE showed a regular polyhedral shape, while spherical and chunky particles were observed for ZnOW. The morphology was crucial in enhancing the cyanide ion photocatalytic degradation efficiency of ZnOE by a factor of 1.5 in comparison to the efficiency of ZnOW at equivalent loading of 0.02 ZnO nanoparticles wt %. Increasing the loading wt % of ZnOE from 0.01 to 0.07 led to an increase in the photocatalytic degradation efficiency from 67% to 90% after 45 minutes and a doubling of the first-order rate constant (k).Type: GrantFiled: January 1, 2012Date of Patent: August 28, 2012Assignee: King Abdulaziz City for Science and Technology (KACST)Inventors: Abdulaziz A Bagabas, Reda M. Mohamed, Mohamed F. A. Aboud, Mohamed Mokhtar M. Mostafa, Ahmad S. Alshammari, Zeid A. Al-Othman
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Patent number: 8252713Abstract: Methods and systems of preparing a catalyst to be used in the synthesis of carbon nanotubes through Chemical Vapor Depositions are disclosed. The method may include a mixture comprising at least one of an iron catalyst source and a catalyst support. In another aspect, a method of synthesizing multi-walled carbon nanotubes using the catalyst is disclosed. The method may include driving a reaction in a CVD furnace and generating at least one multi-walled carbon nanotube through the reaction. The method also includes depositing the catalyst on the CVD furnace and driving a carbon source with a carrier gas to the CVD furnace. The method further includes decomposing the carbon source in the presence of the catalyst under a sufficient gas pressure for a sufficient time to grow at least one multi-walled carbon nanotube.Type: GrantFiled: November 10, 2010Date of Patent: August 28, 2012Assignee: King Abdulaziz City Science and TechnologyInventors: Mohammed Abdullah Bahattab, Ibrahim M Al-Najjar, Abdulaziz A Bagabas
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Publication number: 20120203034Abstract: Isopropyl alcohol is a very useful chemical that is widely used in the industry as a solvent. Economical and easy process to make ispopropyl alcohol using novel composite catalyst is described in the instant application. Production of isopropyl alcohol (IPA) from dimehtyl ketone (DMK) and hydrogen (H2) in gas-phase using a ruthenium nano-particle-supported on activated charcoal/nano-zinc oxide composite catalyst is described. Gas phase production of isopropyl alcohol using DMK and hydrogen is also described using optimal time on stream, temperature, catalyst ratio and DMK/H2 ratio. Ruthenium nano-zinc oxide composite catalyst is formulated using different ratios of ruthenium activated charcoal and n-ZnO is described. CAT-IV is shown to be the best performer for the efficient production of isopropyl alcohol.Type: ApplicationFiled: April 16, 2012Publication date: August 9, 2012Applicant: KING ABDULAZIZ CITY FOR SCIENCE AND TECHNOLOGY (KACST)Inventors: ABDULAZIZ A. BAGABAS, MOHAMED MOKHTAR MOHAMED MOSTAFA, ABDULRAHMAN A. AL-RABIAH, VAGIF MALIK AKHMEDOV
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Patent number: 8236272Abstract: Methods and systems of preparing a catalyst to be used in the synthesis of carbon nanotubes through Chemical Vapor Depositions are disclosed. The method may include a mixture comprising at least one of an iron catalyst source and a catalyst support. In another aspect, a method of synthesizing multi-walled carbon nanotubes using the catalyst is disclosed. The method may include driving a reaction in a CVD furnace and generating at least one multi-walled carbon nanotube through the reaction. The method also includes depositing the catalyst on the CVD furnace and driving a carbon source with a carrier gas to the CVD furnace. The method further includes decomposing the carbon source in the presence of the catalyst under a sufficient gas pressure for a sufficient time to grow at least one multi-walled carbon nanotube.Type: GrantFiled: June 2, 2011Date of Patent: August 7, 2012Assignee: King Abdulaziz City for Science and TechnologyInventors: Mohammed Abdullah Bahattab, Ibrahim M Al-Najjar, Abdulaziz A Bagabas
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Publication number: 20120177545Abstract: Methods and systems of preparing a catalyst to be used in the synthesis of carbon nanotubes through Chemical Vapor Depositions are disclosed. The method may include a mixture comprising at least one of an iron catalyst source and a catalyst support. In another aspect, a method of synthesizing multi-walled carbon nanotubes using the catalyst is disclosed. The method may include driving a reaction in a CVD furnace and generating at least one multi-walled carbon nanotube through the reaction. The method also includes depositing the catalyst on the CVD furnace and driving a carbon source with a carrier gas to the CVD furnace. The method further includes decomposing the carbon source in the presence of the catalyst under a sufficient gas pressure for a sufficient time to grow at least one multi-walled carbon nanotube.Type: ApplicationFiled: March 9, 2012Publication date: July 12, 2012Applicant: King Abdulaziz City Science and TechnologyInventors: MOHAMMED ABDULLAH BAHATTAB, IBRAHIM M. AL-NAJJAR, ABDULAZIZ A. BAGABAS
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Publication number: 20120114550Abstract: Methods and systems of preparing a catalyst to be used in the synthesis of carbon nanotubes through Chemical Vapor Depositions are disclosed. The method may include a mixture comprising at least one of an iron catalyst source and a catalyst support. In another aspect, a method of synthesizing multi-walled carbon nanotubes using the catalyst is disclosed. The method may include driving a reaction in a CVD furnace and generating at least one multi-walled carbon nanotube through the reaction. The method also includes depositing the catalyst on the CVD furnace and driving a carbon source with a carrier gas to the CVD furnace. The method further includes decomposing the carbon source in the presence of the catalyst under a sufficient gas pressure for a sufficient time to grow at least one multi-walled carbon nanotube.Type: ApplicationFiled: June 2, 2011Publication date: May 10, 2012Applicant: King Abdulaziz City Science and TechnologyInventors: Mohammed Abdullah Bahattab, Ibrahim M. Al-Najjar, Abdulaziz A. Bagabas
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Publication number: 20120097522Abstract: A simple, room-temperature method of producing zinc oxide nanoparticles was established by reacting zinc nitrate hexahydrate and cyclohexylamine (CHA) in either aqueous or EtOHic medium. Particles of polyhedra morphology were obtained for zinc oxide, prepared in EtOH (ZnOE), while an irregular spherical morphology, mixed with some chunky particles forzinc oxide prepared in water (ZnOW). The results indicate that there are significant morphological differences between ZnOE and ZnOW. ZnOE showed a regular polyhedral shape, while spherical and chunky particles were observed for ZnOW. The morphology was crucial in enhancing the cyanide ion photocatalytic degradation efficiency of ZnOE by a factor of 1.5 in comparison to the efficiency of ZnOW at equivalent loading of 0.02 ZnO nanoparticles wt %. Increasing the loading wt % of ZnOE from 0.01 to 0.07 led to an increase in the photocatalytic degradation efficiency from 67% to 90% after 45 minutes and a doubling of the first-order rate constant (k).Type: ApplicationFiled: January 1, 2012Publication date: April 26, 2012Applicant: King Abdulaziz City for Science and Technology(KACST)Inventors: Abdulaziz A. Bagabas, Reda M. Mohamed, Mohamed F. A. Aboud, Mohamed Mokhtar M. Mostafa, Ahmad S. Alshammari, Zeid A. AL-Othman
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Patent number: 8110708Abstract: Ruthenium/activated charcoal (Ru/AC) treated with synthesized nano-ZnO (n-ZnO) is used for the first time as a novel composite catalyst in one-step self-condensation of acetone (DMK) to methyl isobutyl ketone in the gas phase. The DMK self-condensation was performed under atmospheric pressure, in a tubular glass fixed-bed microreactor, under DMK and H2 continuous flow at temperature in the range of 523 to 648 K. Addition of n-ZnO to Ru/AC resulted in a pronounced increase in the degree of dispersion of Ru and in the acidic/basic sites concentration ratio. For the one-step synthesis of MIBK at 623 K, the composite catalyst with 2.5 wt % Ru loading was an active and selective bi-functional composite catalyst with balanced acid/base and hydrogenation properties. At 523 K, isopropyl alcohol, product of DMK-direct hydrogenation, was produced in high selectivity for instantly investigated composite catalyst.Type: GrantFiled: April 27, 2011Date of Patent: February 7, 2012Assignee: King Abdulaziz City for Science and Technology (KACST)Inventors: Abdulaziz A Bagabas, Mohamed Mokhtar Mohamed Mostafa, Abdulrahman A Al-Rabiah, Vagif Melik Akhmedov
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Patent number: 8101805Abstract: A low-pressure one-step gas-phase process for the production and recovery of methyl isobutyl ketone (MIBK) is disclosed. One-step gas-phase synthesis of MIBK from acetone and hydrogen over nano-Pd/nano-ZnCr2O4 catalyst at atmospheric pressure is used as an example. The said process is designed to recover the additional heat associated with the reactor effluent via heating acetone feed and recycle (mixed acetone) before entering the reactor. A compressor is introduced to the gas-phase process to increase slightly the reactor effluent pressure before this effluent is cooled and fed to a flash drum. The compressed reactor effluent is used to preheat hydrogen feed and recycle (mixed hydrogen) before entering the reactor. The separation scheme of low-pressure one-step gas-phase process comprises of several distillation columns used for MIBK separation and purification.Type: GrantFiled: June 7, 2011Date of Patent: January 24, 2012Assignee: King Abdulaziz City for Science and Technology (KACST)Inventors: Abdulrahman A Al-Rabiah, Abdulaziz A Bagabas, Akhmedov Vagif Malik
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Publication number: 20110237837Abstract: A low-pressure one-step gas-phase process for the production and recovery of methyl isobutyl ketone (MIBK) is disclosed. One-step gas-phase synthesis of MIBK from acetone and hydrogen over nano-Pd/nano-ZnCr2O4 catalyst at atmospheric pressure is used as an example. The said process is designed to recover the additional heat associated with the reactor effluent via heating acetone feed and recycle (mixed acetone) before entering the reactor. A compressor is introduced to the gas-phase process to increase slightly the reactor effluent pressure before this effluent is cooled and fed to a flash drum. The compressed reactor effluent is used to preheat hydrogen feed and recycle (mixed hydrogen) before entering the reactor. The separation scheme of low-pressure one-step gas-phase process comprises of several distillation columns used for MIBK separation and purification.Type: ApplicationFiled: June 7, 2011Publication date: September 29, 2011Applicant: King Abdulaziz City for Science and Technology (KACST)Inventors: Abdulrahman A. Al-Rabiah, Vagif Malik Akhmedov, Abdulaziz A. Bagabas