Nanostructured aluminosilicate wax carrier for asphalt

Patent metadata

Field	Value
Publication number	US-12110397-B2
Application number	US-202117220549-A
Country	US
Kind code	B2
Filing date	Apr 1, 2021
Priority date	Apr 2, 2020
Publication date	Oct 8, 2024
Grant date	Oct 8, 2024

Abstract

A modified bitumen includes bitumen and a bitumen modifier. The bitumen modifier includes composite particles. The composite particles include aluminosilicate nanostructures defining nanopores and micropores and paraffin wax adhered to surfaces of the aluminosilicate nanostructures. Modifying bitumen includes combining bitumen and the bitumen modifier.

First claim

What is claimed is:

1. A modified bitumen comprising:
bitumen; and
composite particles comprising:
aluminosilicate nanostructures comprising nano-zeolite particles and defining nanopores and micropores; and
paraffin wax adhered to surfaces of the aluminosilicate nanostructures,
wherein a total amount of paraffin wax in the modified bitumen comprises:
the paraffin wax adhered to the surfaces of the aluminosilicate nanostructures; and
an additional amount of paraffin wax, and

wherein the total amount of the paraffin wax comprises 0.1 wt % to 10 wt % of a weight of the bitumen and the composite particles.

2. The modified bitumen of claim 1 , wherein the total amount of the paraffin wax comprises 1 wt % to 10 wt % of the weight of the bitumen and the composite particles.

3. The modified bitumen of claim 1 , wherein the aluminosilicate nanostructures adsorb or neutralize acid.

4. The modified bitumen of claim 1 , wherein the aluminosilicate nanostructures emit water.

5. The modified bitumen of claim 1 , wherein the surfaces comprise exterior surfaces of the aluminosilicate nanostructures.

6. The modified bitumen of claim 1 , wherein the surfaces comprise interior surfaces of the aluminosilicate nanostructures.

7. The modified bitumen of claim 6 , wherein the paraffin wax is impregnated in the nanopores and micropores of the aluminosilicate nanostructures.

8. The modified bitumen of claim 1 , wherein the modified bitumen, when heated, releases the paraffin wax from the nanopores and micropores to yield paraffin wax in the bitumen and locations vacated by the paraffin wax.

9. The modified bitumen of claim 8 , wherein the paraffin wax in the bitumen is crystallized in the bitumen.

10. The modified bitumen of claim 8 , wherein the locations vacated by the paraffin wax adsorb organic acids in the bitumen.

11. A method of modifying bitumen, the method comprising:
combining bitumen and a multiplicity of composite particles, wherein each composite particle comprises:
aluminosilicate nanostructures comprising nano-zeolite particles and defining nanopores and micropores; and
paraffin wax adhered to surfaces of the aluminosilicate nanostructures, wherein a total amount of paraffin wax in the modified bitumen comprises:
the paraffin wax adhered to the surfaces of the aluminosilicate nanostructures; and
an additional amount of paraffin wax, and

wherein the total amount of the paraffin wax comprises 0.1 wt % to 10 wt % of a weight of the bitumen and the composite particles.

12. The method of claim 11 , wherein the paraffin wax is impregnated in the nanopores and the micropores of the aluminosilicate nanostructures.

13. The method of claim 11 , wherein combining the bitumen and the multiplicity of the composite particles releases a portion of the paraffin wax from the composite particles.

14. A method of forming a bitumen modifier, the method comprising:
heating zeolite nanostructures comprising nano-zeolite particles and defining nanopores and micropores;
contacting the zeolite nanostructures with melted paraffin wax; and
solidifying the paraffin wax, thereby adhering the paraffin wax to surfaces of the zeolite nanostructures.

15. The method of claim 14 , further comprising impregnating the zeolite nanostructures with the melted paraffin wax.

16. A bitumen modifier comprising:
zeolite nanostructures comprising nano-zeolite particles and defining nanopores and micropores; and
paraffin wax adhered to the zeolite nanostructures.

17. The bitumen modifier of claim 16 , wherein the paraffin wax is impregnated in the nanopores and the micropores of the zeolite nanostructures.

Assignees

• Seo Dong Kyun
• Kaloush Kamil
• Samieadel Alireza
• Fini Elham
• Chen Shaojiang
• Univ Arizona State

Inventors

• Seo Dong-Kyun
• Kaloush Kamil
• Samieadel Alireza
• Fini Elham
• Chen Shaojiang

Classifications

• C08K3/34

  Silicon-containing compounds · CPC title

• C08L2555/72

  Petrochemical based or extracted waxes, e.g. paraffin, Montan wax or cracked polyethylene wax · CPC title

• C08K2201/011

  Nanostructured additives · CPC title

• C08L2555/50

  Inorganic non-macromolecular ingredients · CPC title

• C08L91/06

  Waxes · CPC title