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

Patent metadata

Field	Value
Publication number	US-12059662-B2
Application number	US-202217989778-A
Country	US
Kind code	B2
Filing date	Nov 18, 2022
Priority date	Oct 11, 2016
Publication date	Aug 13, 2024
Grant date	Aug 13, 2024

Abstract

Described herein are coated chloride salt particles, including NaCl/TiO2 and NaCl/SiO2 core/shell particles, along with methods of making and using the same.

First claim

That which is claimed is:

1. A method of preparing chloride salt particles for use in cloud seeding, the method comprising:
adding an aqueous chloride salt solution to an organic solvent while mixing to form a mixture comprising a precipitate, wherein a volume ratio of chloride salt solution to organic solvent in the mixture is in a range of about 1:50 to about 1:100; and
isolating the precipitate to provide the chloride salt particles,
wherein the mixing is carried out at a speed in a range of about 500 rpm to about 1500 rpm, and a particle size of the chloride salt particles is about 1 micron or less.

2. The method of claim 1 , wherein the organic solvent is an alcohol.

3. The method of claim 2 , wherein the alcohol is 2-propanol.

4. The method of claim 1 , wherein the chloride salt solution has a molarity in a range of about 0.5 M to about 2 M.

5. The method of claim 4 , wherein the molarity is about 1.5 M.

6. The method of claim 1 , wherein isolating the precipitate to provide the chloride salt particles comprises filtering the mixture.

7. The method of claim 1 , wherein the speed is about 900 rpm.

8. The method of claim 1 , wherein the particle size ranges between about 500 nm and about 800 nm.

9. A method of preparing chloride salt particles for use in cloud seeding, the method comprising:
adding a chloride salt solution to an alcohol solvent at a volume ratio of about 1:50 to form a mixture comprising a precipitate; and
isolating the precipitate to provide chloride salt particles having a particle size between about 500 nm and about 1000 nm.

10. The method of claim 9 , wherein the chloride salt solution is sodium chloride or potassium chloride.

11. The method of claim 9 , wherein the alcohol solvent is 2-propanol.

12. The method of claim 9 , wherein the mixture is formed while mixing at a speed in a range of about 500 rpm to about 1500 rpm.

13. The method of claim 12 , wherein the speed is about 900 rpm.

14. The method of claim 9 , wherein the chloride salt solution has a molarity of about 1.5 M.

15. The method of claim 9 , wherein isolating the precipitate includes filtering the mixture.

16. The method of claim 9 , further comprising: after isolating the precipitate, drying the precipitate.

Assignees

• Univ Khalifa Science & Technology
• Nat Center Of Meteorology
• Nat Center Of Meteorolgy

Inventors

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

Classifications

• C01D3/04

  Chlorides · CPC title

• 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