Separation column containing titanium oxide nanotubes

Patent metadata

Field	Value
Publication number	US-11659846-B2
Application number	US-202218048468-A
Country	US
Kind code	B2
Filing date	Oct 21, 2022
Priority date	Sep 9, 2019
Publication date	May 30, 2023
Grant date	May 30, 2023

Abstract

A method of removing one or more antibiotics from a dairy product, the method involve passing the dairy product comprising an antibiotic in a first amount through a bulk comprising, relative to a total bulk weight, at least 75 wt. % of titanium oxide nanostructures, to provide the dairy product comprising the antibiotic in a second, lesser amount, wherein the nanostructures have lengths at least two-fold in excess of their width and height. Bulk materials useful in this or related methods or applications may have loosely tangled, noodle-like morphologies on sub-100 nm scale, and need not employ graphene and/or polymeric support networks in columns, generally having only titanium oxides without silicon or iron oxides.

First claim

The invention claimed is:

1. A separation column, comprising:
a stationary phase comprising at least 90 wt. % of titanium oxide nanotubes, relative to a total weight of the stationary phase,
wherein the titanium oxide has a formula H x Na 2-x Ti 2 O 5 .(H 2 O), wherein x≤2, and
wherein the nanotubes have an average diameter in a range of from 5 to 200 nm, a BET surface area in a range of from 175 to 225 m 2 /g, and/or an average pore size in a range of from 65 to 85 Å, and/or an average particle size in a range of from 60 to 125 μm.

2. The column of claim 1 , wherein the average diameter of the nanotubes is no greater than 20 nm.

3. The column of claim 1 , wherein the titanium oxide nanotubes have an anatase crystal structure.

4. The column of claim 1 , having a length in a range of from 10 to 30 cm and a diameter in a range of from 4 to 10 cm.

5. The column of claim 1 , wherein the stationary phase comprises no more than 0.1 wt. % of organic polymer and graphite.

6. The column of claim 1 , which does not contain graphene.

7. A separation column, comprising:
a stationary phase comprising at least 90 wt. % of titanium oxide nanotubes relative to a total weight of the stationary phase,
wherein the titanium oxide has a formula H x Na 2-x Ti 2 O 5 .(H 2 O), wherein x≤2,
wherein the nanotubes have an average diameter in a range of from 5 to 200 nm, and
wherein the titanium oxide nanotubes have an average pore size of from 65 to 85 Å.

8. The column according to claim 1 , comprising no more than 0.5 wt %, relative to the total stationary phase weight, of a total amount of a polyolefin polymer, a polyamide polymer, a polyimide polymer, a polyester, a polysulfone, an ABS polymer, a PAN polymer, a PES polymer, a PEVK polymer, a PVC polymer, a polyurethane polymer, a polyacrylonitrile polymer, a polychloroprene polymer and a fluoropolymer.

Assignees

• Univ Imam Abdulrahman Bin Faisal

Inventors

• Kochkar Hafedh
• Alomair Nuhad Abdullah
• Albilali Reem Khalid
• Aljameel Suhailah Saud

Classifications

• B01J20/041

  Oxides or hydroxides · CPC title

• B01J20/28061

  being in the range 100-500 m2/g · CPC title

• B01J20/28007

  with size in the range 1-100 nanometers, e.g. nanosized particles, nanofibers, nanotubes, nanowires or the like (carbon nanostructures B01J20/205) · CPC title

• A23L5/273

  using adsorption or absorption agents, resins, synthetic polymers, or ion exchangers · CPC title

• A23C7/043 Primary

  using chemicals in liquid or solid state, e.g. flocculating, adsorbing or extracting agents (A23C9/146 and A23C9/148 take precedence) · CPC title