Method for production of aluminum chloride derivatives
Aluminum chlorohydrate products comprise particles of aluminum chlorohydrate in fractured crystal form, the particles having a basicity in the range of 0% to about 85.6%, and a surface area to weight ratio of about 295 to about 705 m 2 /kg, inclusive of both endpoints and all numerical values therebetween, where the ratio is measured by laser diffraction. Methods of producing such products are also disclosed.
1. A method for producing aluminum chloride hydrate particles of a desired basicity, said method comprising:
applying a heated gas stream to a circular mill to establish and maintain a circulating gas stream within the mill at an operating temperature in a range of between 200° F. and 400° F.;
feeding aluminum chloride hexahydrate crystals into the circular mill, wherein aluminum chlorohydrate particles are formed and the resulting particles are separated based on particle density, the particles having a basicity that is a function of the operating temperature; and
collecting dried aluminum chlorohydrate particles as the particles exit the circular mill.
2. The method of claim 1 , wherein the dried particles collected from the mill have a basicity range of 0 to 85.6%.
3. The method of claim 1 , wherein the operating temperature is in the range of between 220 and 240° F.
4. The method of claim 3 , wherein the collected dried particles comprise Al 2 Cl 6 and have a basicity of 0 to 5%.
5. The method of claim 1 , wherein the operating temperature is in the range of between 260 and 280° F.
6. The method of claim 5 , wherein the collected dried particles comprise Al 2 (OH)Cl 5 and have a basicity of 14 to 18%.
7. The method of claim 1 , wherein the operating temperature is in the range of between 300 and 310° F.
8. The method of claim 7 , wherein the collected dried particles comprise Al 2 (OH) 2 Cl 4 and have a basicity of 31 to 35%.
9. The method of claim 1 , wherein the operating temperature is in the range of between 340 and 350° F.
10. The method of claim 9 , wherein the collected dried particles comprise Al 2 (OH) 3 Cl 3 and have a basicity of 38 to 52%.
11. The method of claim 1 , wherein the operating temperature is in the range of between 350 and 360° F.
12. The method of claim 11 , wherein the collected dried particles comprise Al 2 (OH) 4 Cl 2 and have a basicity of 64 to 68%.
13. The method of claim 1 , wherein the operating temperature is in the range of between 380 and 400° F.
14. The method of claim 13 , wherein the collected dried particles comprise Al 2 (OH) 5 Cl and have a basicity of 81 to 85%.
15. The method of claim 1 , wherein the gas stream comprises ambient air and steam.
16. The method of claim 1 , wherein said dried particles have a bulk density of 40 to 65 pounds per cubic foot.
17. The method of claim 1 , wherein the collected dried particles have a surface area of greater than about 300 square meters per kilogram and less than about 700 meters per kilogram, as measured by laser diffraction.
18. The method of claim 1 , wherein the collected dried particles have a surface area of greater than 500 square meters per kilogram and less than 600 meters per kilogram, as measured by laser diffraction.
19. The method of claim 1 , wherein the collected dried particles have a mean particle size in the range of about 10 microns to about 15 microns.