Carbon Dioxide → HCID 131716486, compound

Participants

Reaction Conditions

Reaction Steps

One kilogram of anhydrous diurea-sulfuric acid adduct is prepared by reacting anhydrous solid urea with chilled fuming sulfuric acid in a flask emersed in a dry ice bath. Four hundred and fifty grams of fuming sulfuric acid are placed in the flask suspended in the dry ice bath and are allowed to cool. 550 grams of anhydrous urea prills are then gradually added over a period of approximately 30 minutes while constantly monitoring the temperature of the reaction phase. The rate of urea addition is controlled to maintain a reaction-phase temperature of approximately 100° C. and the reaction phase is continuously stirred during the reaction. The resulting product contains less than 0.5 weight percent water, has a urea/sulfuric acid molar ratio of 2.0, contains approximately 55 weight percent urea and 45 weight percent sulfuric acid, and has a melting point of approximately 85° C.

Provenance & Evidence