US 11,305,255 B2Granted

MTBE-removal composition with acid-treated fly ash particles

AssigneesKing Fahd University of Petroleum and Minerals, King Abdulaziz City for Science and Technology

InventorsBassam Shafiq Tawabini, Muataz Ali Atieh, Faraj Ahmad Abuilaiwi, Segun Biodun Adebayo

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Abstract

Compositions for the adsorptive removal of methyl tertiary butyl ether (MTBE) from contaminated water sources and systems. The compositions contain carbon fly ash doped with silver nanoparticles at specific mass ratios. Methods of preparing and characterizing the adsorbents are described. The composition may contain carbon acid-treated fly ash particles that consist of carbon, oxygen, and sulfur, and have silver oxide nanoparticles present on the surface and in pore spaces of the carbon acid-treated fly ash particles. The composition may be in the form of particles having sizes in a range of 100 nm to 2.5 μm with a BET surface area of at least 16.789 m2/g, and contain the carbon acid-treated fly ash particles and the metal silver oxide nanoparticles at mass percentages of 50-90% and 10-50%, respectively.

Claims7

Dependent claims

A composition for removing MTBE from an aqueous solution, comprising:

acid-treated fly ash particles;
and
silver oxide nanoparticles having diameters in a range of 1-10 nm;
wherein the acid-treated fly ash particles consist of carbon, oxygen, and sulfur;
wherein the silver oxide nanoparticles are present on the surface and in pore spaces of the acid-treated fly ash particles;
wherein the composition is in the form of particles having sizes in a range of 100 nm to 2.5 μm and has a BET surface area of at least 16.789 m2/g,
wherein the acid-treated fly ash particles and the silver oxide nanoparticles are present in the composition at mass percentages of 50-90% and 10-50%, respectively, based on the total weight of the composition,
wherein the acid-treated fly ash particles are prepared by:
stirring a raw fly ash with nitric acid to form a slurry;
and
washing the slurry to produce the acid-treated fly ash particles.

8 more elements

Dependencies are inferred from the claim text.

Facts

Application: 16/787,691Filed 11 Feb 2020 · continuation
Priority: 29 Aug 2014
Published: US 2020/0171460 A14 Jun 2020
Granted: 19 Apr 2022
Term ends: Not estimatedThe source records don’t support an estimate.

Classification11 codes

B01J 20/20
Comprising inorganic material: comprising free carbon; comprising carbon obtained by carbonising processes
B01J 20/02
Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof:…
B01J 20/0233
Comprising compounds of metals not provided for in B01J20/04: compounds of Cu, Ag, Au
B01J 20/28059
Surface area, e.g. B.E.T specific surface area: being less than 100 m2/g

Family

Application14/473,702Parent of this division · filed 29 Aug 2014
Application15/836,186Parent of this continuation · filed 8 Dec 2017
US 2020/0171460 A1Pre-grant publication · published 4 Jun 2020
US 10,596,546 B2Parent of this continuation
Application15/836,186Parent of this division
US 2016/0059210 A1Published application
US 2018/0099263 A1Published application
US 11,305,255 B2This patent

From the US filing history. Foreign family members aren’t listed.

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