Iron(II) sulfate heptahydrate

The filtration drying method of the yellow iron oxide pigment has been proposed. The main characteristics of the stationary layer and the experimental results of the hydrodynamics of filtering the heat agent through the stationary layer of pigment of different heights have been presented, which allows us to conclude the application feasibility of the filtration method by taking into account insignificant values of pressure drops.

The filtration method of gradual dehydration of Iron(II) sulfate heptahydrate hase been proposed. Based on the generalization of experimental data of hydrodynamics, the calculated dependence Euзовн=155∙Reзовн-0,55∙Hdч  was obtained, which makes it possible to determine theoreticallypressure losses in the stationary layer of FeSO4·7H2O.According to the results of complex thermal analysis, the regularities of the gradual dehydration process of FeSO4·7H2O have been established in different temperature intervals.