Coated chloride salt particles and methods of making and using the same

Patent metadata

Field	Value
Publication number	US-12138609-B2
Application number	US-202217989753-A
Country	US
Kind code	B2
Filing date	Nov 18, 2022
Priority date	Oct 11, 2016
Publication date	Nov 12, 2024
Grant date	Nov 12, 2024

Abstract

Described herein are coated chloride salt particles, including NaCl/TiO 2 and NaCl/SiO 2 core/shell particles, along with methods of making and using the same.

First claim

That which is claimed is:

1. A particle comprising a core and a shell, wherein the core comprises sodium chloride and/or potassium chloride and the shell consists essentially of titanium dioxide and/or silicon dioxide, and the shell covers the core and has a thickness between about 5 nm and about 50 nm.

2. The particle of claim 1 , wherein the core is hygroscopic and the shell is hydrophilic.

3. The particle of claim 1 , wherein the shell is present in amount of about 0.5% to about 20% by weight of the particle.

4. The particle of claim 1 , wherein the particle has a water vapor adsorption capacity that is greater than the water vapor adsorption capacity of an uncoated chloride salt particle a pure chloride salt particle and/or a particle consisting of a chloride salt of the same or substantially the same size.

5. The particle of claim 1 , wherein the particle has a water adsorption capacity of at least about 1 cm 3 /g to about 100 cm 3 /g.

6. The particle of claim 1 , wherein the particle adsorbs water when in an environment having a relative water vapor pressure in a range of about 0.1 P/P 0 or greater.

7. The particle of claim 1 , wherein the shell comprises amorphous titanium dioxide and/or crystalline titanium dioxide.

8. The particle of claim 1 , wherein the particle has a hygroscopic point that is decreased compared to an uncoated chloride salt particle, a pure chloride salt particle and/or a particle consisting of a chloride salt.

9. A coated particle configured for water adsorption, the coated particle comprising:
a core formed of at least one of sodium chloride and potassium chloride; and
a coating covering the core to form the coated particle, the coating consisting essentially of at least one of titanium dioxide and silicon dioxide and having a thickness between about 5 nm and about 50 nm.

10. The coated particle of claim 9 , wherein the thickness is about 20 nm.

11. The coated particle of claim 9 , wherein the coating is a hydrophilic surface.

12. The coated particle of claim 9 , wherein the coating is between about 1.5% and about 5% by weight of the particle.

13. The coated particle of claim 9 , wherein the core is formed of sodium chloride and the coating is formed of titanium dioxide.

14. The coated particle of claim 9 , wherein a water adsorption capacity of the coated particle is at least about 0.37 cm 3 /g.

15. The coated particle of claim 14 , wherein the water adsorption capacity is between about 1 cm 3 /g and about 100 cm 3 /g.

16. The coated particle of claim 9 , wherein the coating includes at least one of crystalline silicon dioxide and crystalline titanium dioxide.

17. A coated particle configured for water adsorption, the coated particle comprising:
a core comprising at least of sodium chloride and potassium chloride; and
a coating covering the core and comprising at least one of titanium dioxide and silicon dioxide, wherein a thickness of the coating is between about 5 nm and about 50 nm.

18. The coated particle of claim 17 , wherein the thickness is about 20 nm.

19. The coated particle of claim 17 , wherein the coating is present in amount of about 0.5% to about 20% by weight of the particle.

20. The coated particle of claim 19 , wherein the amount is between about 1.5% and about 5% by weight of the particle.

Assignees

• Univ Khalifa Science & Technology
• Nat Center Of Meteorology

Inventors

• Zou Linda Yuan
• Jouiad Mustapha
• Zaki Abdelali
• El Hadri Nabil
• Liang Haoran

Classifications

• C01P2004/03

  obtained by SEM · CPC title

• C01P2002/82

  by IR- or Raman-data · CPC title

• C01P2002/72

  by d-values or two theta-values, e.g. as X-ray diagram · CPC title

• C01P2004/84

  one phase coated with the other · CPC title

• C01D3/04

  Chlorides · CPC title