Reaction equation
[NH2:1][C:2](N)=[O:3].[CH3:5][CH2:6][CH2:7][CH2:8][O:9][CH2:10][CH2:11][OH:12]>[Ni]>[C:2](=[O:3])([O:12][CH2:11][CH2:10][O:9][CH2:8][CH2:7][CH2:6][CH3:5])[NH2:1]Participants
Reactant 2
Product 1
Reagents, catalysts & solvents 1
Conditions
- Temperature
- 135 °C
Procedure
60 parts of urea are mixed with 177 parts of butylglycol and 3 parts of a cation exchanger which is commercially available under the registered name Lewatit CA 9259 and, having been treated in accordance with Example (1 a), contains nickel, in a stirred apparatus. The mixture is heated to 135° C., whilst stirring. It is then heated for 10 hours at 140° C. After cooling, the mixture is filtered and the excess butylglycol is distilled from the filtrate under reduced pressure. 158 parts of n-butoxyethyl carbamate (corresponding to 98% of theory, based on urea) are obtained. On distillation of the end product in a high vacuum, a residue of only 0.9% by weight is left. The pure butoxyethyl carbamate has a boiling point 118°-120° C. at 0.2 mm Hg.
Workup
- temperatureIt is then heated for 10 hours at 140° C
- temperatureAfter cooling
- filtrationthe mixture is filtered
- distillationthe excess butylglycol is distilled from the filtrate under reduced pressure
Sources & evidence
- ORD record
- ord-b2f605f8e7b74eff9c2e3e6670945b4d
- Source dataset
- uspto-grants-1979_05
- Patent number
- US04156784
Linked notes
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