IN THIS ARTICLE. 1  Definition of eczema in babies. 2  Symptoms of eczema. 3  Causes of eczema. 4  Treatments for eczema. 5  Eczema and allergenic foods. 6  Treatment of eczema rash that doesn't get better.
The process for conversion of FGD gypsum to ammonium sulfate and calcium carbonate by the reaction with ammonium carbonate is by a unique combination of countercurrent flows with internal recycle of liquids to maximize the purity of reaction products while minimizing the reaction time.
â¢ Calcium carbonate is the main constituent of limestone, and in gypsum, it is CaSO 4 Â·2H 2 O. â¢ Gypsum is more soluble than limestone. â¢ Limestone is an acidic mineral. It can change the soil pH due to the carbonate group, but gypsum is a neutral mineral; therefore, it cannot change soil pH.