公开(公告)号：US11998892B1

公开(公告)日：2024-06-04

申请号：US18133636

申请日：2023-04-12

Applicant: KING SAUD UNIVERSITY

Inventor： Ahmed Yacine Badjah Hadj Ahmed ,  Khadejah Dhafer Yahya Otaif ,  Zeid Abdullah Alothman ,  Khalid Mohammed Nasser Alotaibi

IPC: B01J20/282 ,  B01J20/286 ,  G01N30/60 ,  G01N30/02

CPC classification number: B01J20/282 ,  B01J20/286 ,  G01N30/6078 ,  G01N2030/025

Abstract: A method of forming a stationary phase of a capillary column for gas chromatography includes in situ growth of a metal-organic framework on an inner surface of the capillary column. The capillary column may include fused silica on an inner surface thereof and can be treated to provide functional groups capable of forming covalent bonds with a difunctional organic linker of the metal-organic framework. Epitaxial growth of the metal organic framework can occur directly on the inner surface of the capillary tube to a desired uniform thickness, controllable by concentration of metal organic framework precursors.

公开(公告)号：US09987617B1

公开(公告)日：2018-06-05

申请号：US15722898

申请日：2017-10-02

Applicant: KING SAUD UNIVERSITY

Inventor： Mu Naushad ,  Ayoub Abdullah Alqadami ,  Tansir Ahamad ,  Zeid Abdullah Alothman ,  Saad M. Alshehri

IPC: B01D39/00 ,  C02F1/28 ,  B01J20/22 ,  B01D15/00 ,  B01J20/28 ,  C07F15/02 ,  B01J20/06 ,  C02F1/66 ,  B01J20/32 ,  B01D24/00 ,  B01J20/00 ,  C02F101/30

CPC classification number: B01J20/28009 ,  B01J20/06 ,  B01J20/22 ,  B01J20/28016 ,  B01J20/3293 ,  C02F1/285 ,  C02F1/288 ,  C02F1/66 ,  C02F2101/308 ,  C02F2303/16 ,  C07F15/025

Abstract: Carboxylic functionalized magnetic nanocomposites can include a magnetic compound, such as Fe3O4, that is encapsulated by a plurality of amino organosilane groups. The organosilane groups can include 3-[2-(2-Aminoethylamino)ethylamino] propyl-trimethoxysilane (TAS). At least some of the organosilane groups can have amino and carboxylic acid substituents. The organic pollutants can include malachite green dye. The carboxylic functionalized magnetic nanocomposites can adsorb dye from solution, such as wastewater. The carboxylic functionalized magnetic nanocomposites can be separated from the solution using an external magnetic material.

公开(公告)号：US11617989B1

公开(公告)日：2023-04-04

申请号：US17013509

申请日：2020-09-04

Applicant: KING SAUD UNIVERSITY

Inventor： Taieb Aouak ,  Mohamed Ouladsmane ,  Ahmed Yacine Badjah Hadj Ahmed ,  Zeid Abdullah Alothman

IPC: B01D71/70 ,  C07C7/177 ,  B01D61/36 ,  B01D69/14 ,  C07C7/144 ,  B01D5/00 ,  C07C15/04

Abstract: The extraction of benzene from benzene/cyclohexane mixture described herein is a process that removes benzene from a benzene/cyclohexane mixture with high selectivity, resulting in an enriched cyclohexane content in the retentate. The process involves adding an aqueous solution of poloxamer 188 to the benzene/cyclohexane mixture and waiting for the mixture to partition into an organic layer above an aqueous layer. Benzene, being more polar than cyclohexane, is selectively drawn into the aqueous layer. Benzene is then removed from the aqueous layer by pervaporation through a composite PDMS (polydimethylsiloxane)/polystyrene membrane. Cyclohexane is recovered from the retentate by drawing off the organic layer of the retentate by any known method. About 97% of benzene has been removed from a 50-50 wt % mixture by pervaporation in the static mode, and about 99% by pervaporation in the continuous mode.

公开(公告)号：US10245576B1

公开(公告)日：2019-04-02

申请号：US16137472

申请日：2018-09-20

Applicant: KING SAUD UNIVERSITY

Inventor： Ayoub Abdullah Alqadami ,  Moonis Ali Khan ,  Zeid Abdullah Alothman ,  Ibrahim Hotan Alsohaimi ,  Masoom Raza Siddiqui ,  Ayman A. Ghfar

IPC: B01J20/06 ,  B01J20/26 ,  B01J20/28 ,  B01J20/34 ,  B01J20/30 ,  H01F1/42 ,  C02F1/66 ,  C02F1/28 ,  C02F1/48 ,  C02F101/20

Abstract: The magnetic polymer nanocomposite for removal of divalent heavy metal ions from water is magnetic nanocomposite having a core of magnetite (Fe3O4) in a shell of branched polyhydroxystyrene (BHPS), designated as Fe3O4@BHPS. The nanocomposite is synthesized by co-precipitation in alkali solution. Testing showed the nanocomposite reached 93% and 80% Pb(II) and Cd(II) adsorption, respectively, in 30 minutes, attaining equilibrium in 120 minutes. The maximum adsorption capacities of Pb(II) and Cd(II) at 298K were 186.2 and 125 mg/g, respectively. After adsorption, the nanocomposite with the heavy metal(s) adsorbed thereto was easily removed from aqueous solution by application of a magnetic field.

公开(公告)号：US10557098B1

公开(公告)日：2020-02-11

申请号：US16360397

申请日：2019-03-21

Applicant: KING SAUD UNIVERSITY

Inventor： Moonis Ali Khan ,  Ayoub Abdullah Alqadami ,  Masoom Raza Siddiqui ,  Zeid Abdullah Alothman

IPC: C10L5/44 ,  C01B32/324 ,  C01B32/20

Abstract: A method of producing hydrochar from jackfruit peel biomass includes hydrothermal carbonization of jackfruit peel biomass by autoclaving at 150° C.-250° C. for about 3 hours to produce a hydrochar. The hydrochar can be activated by treatment with phosphoric acid (H3PO4), hydrogen peroxide (H2O2), or a combination thereof. The hydrochar produced according to the method is particularly effective at removing azo-dyes, and specifically methylene blue, from aqueous solutions such as industrial waste water.

公开(公告)号：US09624335B1

公开(公告)日：2017-04-18

申请号：US15151469

申请日：2016-05-10

Applicant: KING SAUD UNIVERSITY

Inventor： Kareem Youssif Hassan Mahmoud ,  Zeid Abdullah Alothman ,  Ayman Sadek Ahmed El-Faham

IPC: C08F292/00 ,  B01D15/20 ,  C08F222/04

CPC classification number: C08F222/04 ,  B01D15/20 ,  C08J7/16 ,  C08J2371/10 ,  C08F2222/1013 ,  C08F230/08

Abstract: The method of preparing a functionalizable monolithic platform includes the steps of: functionalizing the silanol groups on a support having silanol groups or the ketone groups on a support having ketone groups with an organic compound having a vinyl group; and copolymerizing the alkenyl-functionalized silanol or ketone groups with itaconic anhydride monomers and vinyl monomers and/or a crosslinker having at least two vinyl reactive groups in a solvent by adding a suitable initiator for a time and temperature or radiation energy sufficient to thereby complete the copolymerization reaction process. The functionalizable monolithic platform has the structural formula: wherein n, m, n′ and m′ are integers greater than 0.

公开(公告)号：US12181450B1

公开(公告)日：2024-12-31

申请号：US18581221

申请日：2024-02-19

Applicant: KING SAUD UNIVERSITY

Inventor： Ahmad Aqel Ifseisi ,  Mohamed Ali Ouladsmane ,  Ahmed Yacine Badjah Hadj Ahmed ,  Zeid Abdullah Alothman

IPC: G01N30/22 ,  G01N30/02

Abstract: The method of metered switching for a high-performance liquid chromatography (HPLC) sample injector is a method of controlled switching for a HPLC sample injector to control the amount of the sample being transferred to the HPLC separation column. In a load mode of the HPLC sample injector, a sample to be tested is injected therein until a sample loop is filled. The HPLC sample injector is switched into an injection mode such that a pressurized mobile phase pushes the sample through the sample loop and out of an outlet port. The HPLC sample injector is then switched back into the load mode at a selected time corresponding to a desired volume of the sample to be dispensed from the outlet port. The time-dependent correspondence between a flow rate of the pressurized mobile phase and the desired volume of the sample for the sample loop is already known.

公开(公告)号：US12037318B1

公开(公告)日：2024-07-16

申请号：US18489697

申请日：2023-10-18

Applicant: KING SAUD UNIVERSITY

Inventor： Mohamed Ali Ouladsmane ,  Ahmed Yacine Badjah Hadj Ahmed ,  Mohammed Mousa Alshehri ,  Zeid Abdullah Alothman

IPC: C07C7/135 ,  B01D53/02 ,  B01J20/10 ,  B01J20/26 ,  B01J20/28

CPC classification number: C07C7/135 ,  B01D53/025 ,  B01J20/103 ,  B01J20/262 ,  B01J20/28052 ,  B01D2253/202 ,  B01D2253/25 ,  B01D2256/24 ,  B01D2257/70 ,  B01D2257/7022 ,  B01D2257/7027 ,  B01J2220/46 ,  B01J2220/86

Abstract: The method of making a wall-coated open tubular capillary column with a poly benzyl stationary phase is a method of preparing a capillary column for gas chromatography. An inner wall of a fused silica capillary column is cleaned and then rinsed with a sodium hydroxide solution. The fused silica capillary column is flushed with isopropanol to form a pre-treated capillary column, and the pre-treated capillary column is loaded with a mixture of phenyl tri-methoxy silane and alcohol. The loaded pre-treated capillary column is heated to form a treated capillary column, which is then washed. A thin layer of a poly benzyl stationary phase is then coated on the inner wall through condensation polymerization of benzyl chloride monomers with a Lewis acid catalyst in a non-polar solvent.

公开(公告)号：US11618004B1

公开(公告)日：2023-04-04

申请号：US16912201

申请日：2020-06-25

Applicant: KING SAUD UNIVERSITY

Inventor： Mu Naushad ,  Tansir Ahamad ,  Ayoub Abdullah Alqadami ,  Ayman Abdelghafar Ahmed ,  Zeid Abdullah Alothman

IPC: B01J20/20 ,  B01J20/30 ,  B01J20/28 ,  C02F1/28 ,  C02F101/30

Abstract: A melamine-formaldehyde derived porous carbon adsorbent may be prepared from melamine-formaldehyde derived porous carbon disposable products. The melamine-formaldehyde derived porous carbon effectively removes organic pollutants from aqueous media. Parameters of contact time, solution pH, initial adsorbate concentration and desorption rate affect efficacy. Adsorption capacities of exemplary melamine-formaldehyde derived porous carbon for MG and MB dyes at 298 K were up to 25 mg/g and 35 mg/g, respectively.