Saved Bookmarks
| 1. |
What is gypsum in digestive process |
|
Answer» Answer: The dihydrate phosphoric acid production PROCESS was simulated in a bench-scale glass reactor. The influences of selected ionic contaminants (Na+, K+, Mg2+, Al3+, F-, and Fe3+) on the crystallization of the gypsum byproduct were investigated. Except for fluorine, the presence of the impurities aided gypsum precipitation, with iron and potassium showing the greatest effect. At cation IMPURITY levels of ca. 0.1%, filter cake RESISTANCE was lowest, but filtration rates decreased at higher impurity levels. MAGNESIUM and iron were largely retained in the acid, whereas sodium and fluorine were largely removed during the precipitation of gypsum. Sodium, magnesium, iron, and aluminum led to increased coprecipitation of PHOSPHATE, whereas fluorine and potassium had no effect |
|