Darstellung und thermische Zersetzung von Erdalkalimetall-Carbamoylphospliaten / Preparation and Thermal Decomposition of Carbamoylphosphates of Alkaline-earth Metals
Open Access
- 1 April 1978
- journal article
- Published by Walter de Gruyter GmbH in Zeitschrift für Naturforschung B
- Vol. 33 (4) , 374-381
- https://doi.org/10.1515/znb-1978-0405
Abstract
After the formation of carbamoylphosphate through the reaction of KH2PO4 with KNCO in aqueous solution, unreacted phosphate and carbamoylphosphate can be separated by fractional precipitation with barium (first step) and calcium or strontium or barium salt solutions (second step) at low temperatures. The carbamoylphosphates of the alkaline earth metals are decomposed above 100 °C to yield predominantly diphosphates and urea. In aqueous suspensions the decomposition proceeds even at room temperature. - The chemical shifts of the phosphorus atom of the carbamoylphosphate ion between pH 6.5 and 8.2 are given.Keywords
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