Carbon Dioxide → HCID 131716486, compound

HRID 2166301Notes

Reaction equation

HRID 2166301 reaction equation
[NH2:1][C:2]([NH2:4])=[O:3].[S:5](=[O:9])(=[O:8])([OH:7])[OH:6].C(=O)=O.[NH2:13][C:14]([NH2:16])=[O:15].S(=O)(=O)(O)O>O>[C:2]1([NH:4][NH:16][C:14](=[O:15])[NH:13][NH:1]1)=[O:3].[S:5](=[O:7])(=[O:6])([OH:9])[OH:8]

Participants

6

Reactant 4

HCID 280Carbon DioxideHCID 1118Sulfuric Acid3×HCID 1176Urea4×HCID 159909Urea sulfate

Product 1

HCID 131716486HCID 131716486, compound

Reagents, catalysts & solvents 1

HCID 962WaterSolvent

Conditions

Temperature
100 °C

Procedure

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.

Workup

  1. customemersed in a dry ice bath
  2. temperatureto cool

Sources & evidence

ORD record
ord-5b61b11491a44aae96d81767fb0f5d40
Source dataset
uspto-grants-1990_07
Patent number
US04944787

Reaction notes

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