| 摘要 |
This invention is directed to controlling the rate and amount of postprecipitate that forms in merchant grade phosphoric acid by treating the acid with cresylic acid, picoline, pyridine and their homologues. This treatment is useful as a control against postprecipitation in the wet process preparation of phosphoric acid. The use of cresylic acid, picoline, and pyridine, and their homologues has been found to cause rapid precipitation of solids from the phosphoric acid, thereby improving the purity of the phosphoric acid in a shorter period of time than previously possible.
|
