Reaction of carbon dioxide with potassium aluminate (aluminium hydroxide precipitation) - p.11
http://chemistry-chemists.com/N3_2023/C ... .html#1002
Quote:
Aluminium hydroxide was precipitated from a potassium aluminate solution by bubbling of carbon dioxide through the solution.
2K[Al(OH)4] + CO2 = 2Al(OH)3 + K2CO3 + H2O
Carbon dioxide was obtained by the reaction of marble and concentrated nitric acid.
Precipitated aluminium hydroxide was dissolved by adding of a new portion of a solution of potassium aluminate, because this solution also contains excess of potassium hydroxide.
Al(OH)3 + KOH = K[Al(OH)4]
Continuous passing of carbon dioxide through the solution leads to the secondary precipitation of aluminium hydroxide.
This process is used to precipitate aluminum hydroxide from a sodium aluminate solution in the aluminium production.
2K[Al(OH)4] + CO2 = 2Al(OH)3 + K2CO3 + H2O
Carbon dioxide was obtained by the reaction of marble and concentrated nitric acid.
Precipitated aluminium hydroxide was dissolved by adding of a new portion of a solution of potassium aluminate, because this solution also contains excess of potassium hydroxide.
Al(OH)3 + KOH = K[Al(OH)4]
Continuous passing of carbon dioxide through the solution leads to the secondary precipitation of aluminium hydroxide.
This process is used to precipitate aluminum hydroxide from a sodium aluminate solution in the aluminium production.
Attachment:
carbon_dioxide-potassium-aluminate-1.jpg [ 438.56 KiB | Viewed 1592 times ]
Attachment:
carbon_dioxide-potassium-aluminate-7.jpg [ 406.84 KiB | Viewed 1592 times ]
Attachment:
carbon_dioxide-potassium-aluminate-15.jpg [ 385.06 KiB | Viewed 1592 times ]
