Method for adsorbing and removing benzene

Patent metadata

Field	Value
Publication number	US-2018339918-A1
Application number	US-201816047530-A
Country	US
Kind code	A1
Filing date	Jul 27, 2018
Priority date	Sep 1, 2015
Publication date	Nov 29, 2018
Grant date	—

Abstract

Methods and nanocomposites for the adsorptive removal of aromatic hydrocarbons such as benzene, toluene, ethyl benzene and xylene from contaminated water sources and systems are provided. The nanocomposites contain carbon nanotubes and metal oxide nanoparticles such as Al 2 O 3 , Fe 2 O 3 and ZnO impregnated on a surface and/or in pore spaces of the carbon nanotubes. Methods of preparing and characterizing the nanocomposite adsorbents are also provided.

First claim

1 : A method for adsorbing and removing benzene from an aqueous solution, comprising;
deagglommerating multi walled carbon nanotubes having an average outer diameter of 10-20 nm and an average inner diameter of 1-10 nm in a mixture with ethanol; mixing the deagglomerated carbon nanotubes with an aluminum salt and heating to form a nanocomposite comprising the multi walled carbon nanotubes and aluminum oxide nanoparticle clusters; contacting the nanocomposite comprising the multi walled carbon nanotubes and the aluminum oxide nanoparticle clusters with the aqueous solution to adsorb the benzene from the aqueous solution, wherein the aluminum oxide nanoparticle clusters are impregnated on an outer surface and/or in pore spaces of the multi walled carbon nanotubes.

2 - 4 . (canceled)

5 : The method of claim 1 , wherein the multi walled carbon nanotubes are present in the nanocomposite in at least 85% by weight relative to the total weight of the nanocomposite and the aluminum oxide nanoparticle clusters are present in the nanocomposite in up to 15% by weight relative to the total weight of the nanocomposite.

6 : The method of claim 1 , wherein the aluminum oxide nanoparticle clusters comprise aluminum oxide nanoparticles having an average particle size of 1-50 nm.

7 . (canceled)

8 : The method of claim 1 , wherein the nanocomposite has a BET surface area of at least 100 m 2 /g.

9 . (canceled)

10 : The method of claim 1 , wherein at least 25% of the total mass of the benzene is removed from the aqueous solution.

11 : The method of claim 1 , wherein up to 90% of the total mass of the benzene is removed from the aqueous solution.

12 - 20 . (canceled)

Assignees

• Univ King Fahd Pet & Minerals

Inventors

• Atieh Muataz Ali
• Abbas Aamir
• Abussaud Basim Ahmed

Classifications

• B01J20/205

  Carbon nanostructures, e.g. nanotubes, nanohorns, nanocones, nanoballs (carbon nanotubes per se C01B32/15) · CPC title

• B01J20/06

  comprising oxides or hydroxides of metals not provided for in group B01J20/04 · CPC title

• C02F1/288 Primary

  using composite sorbents, e.g. coated, impregnated, multi-layered · CPC title

• C02F2305/08

  Nanoparticles or nanotubes · CPC title

• C02F2103/365

  from petrochemical industry (e.g. refineries) · CPC title