Follow us on:

2009 Babkina Phase equilibria in binary subsystems of Urea-Biuret-Water system

Joint results of the differential scanning calorimetry (DSC) and thermogravimetry (TG) experiments were the basis for the fusion enthalpy and temperature determination of the biuret (NH2CO)2NH (synthesis byproduct of the urea fertilizer (NH2)2CO). Recommended values are DmH = (26.1 ± 0.5) kJ mol-1, Tm = (473.8 ± 0.4) K. The DSC method allowed for the phase diagrams of ‘‘water–biuret,’’ ‘‘water–urea,’’ ‘‘urea–biuret’’ binary systems to be studied; as a result, liquidus and solidus curves were precisely defined. Stoichiometry and decomposition temperature of the biuret hydrate identified, composition of the compound in ‘‘urea–biuret’’ system was suggested.

 

Share this on:
Twitter
LinkedIn
UreaKnowHow

UreaKnowHow.com is an independent group of nitrogen fertilizer specialists with an impressive number of years experience in designing, maintaining and operating nitrogen fertilizer plants.

Solution Providers offer their solutions to improve our member’s plants performance.