Fertilizer from Rock Phosphate Conversion by Fusion and Treatment with water Vapor

Crop Response to Fused Tricalcium Phosphate

“…Fused tricalciwn phosphate was manufactured in quantity by the Tennessee Valley Authority from June 1945 until July 1954 to obtain information on operating efficiency of furnaces of different designs, on economics of the process, on agronomic value of the material and on other points of interest to potential commercial producers of the product. The details of manufacture, as well as a discussion of the chemistry of this material, have been thoroughly covered in several publications ( 4,6,8,10).…”

Production of Fertilizer from Phosphate Rock

“…These curves were obtained by inserting a thermocouple in the mixture of materials and noting the time-temperature relationship as the materials passed from the solid state to the liquid state on slow heating. The melting point for any particular mixture was defined as the inflection point of the time-temperature curve (5). The melting points for mixtures of langbeinite A and phosphate rock L have been plotted against composition in Figure 2.…”

History of Calcium Phosphates in Regenerative Medicine

“…In 1935, the heat capacity values of calcium orthophosphates were measured [221]. Very popular at the turn of this millennium silicon-(or silica-) contained calcium orthophosphates, in fact, appear to have been known since, at least, 1937 [222][223][224], simultaneously with defluorination studies of natural phosphate rocks [224][225][226]. Applications of calcium orthophosphates for removal of fluorides from water have been known since, at least, 1938 [227][228][229], while the earliest research paper on using calcium orthophosphates in chromatography was published in 1942 [230].…”