Process for the preparation of alkyl-ureas

Details Process for the preparation of alkyl-ureas Process for the preparation of alkyl-ureas

1980-09-11

1982-01-12

Doll, John

Organic compounds -- part of the class 532-570 series

Organic compounds

Amino nitrogen containing

564 58, C07C12715

Patent

active

043106927

ABSTRACT:
The instant invention is directed to a process for the preparation of an alkyl-substituted urea of the formula ##STR1## wherein R and R', which may be the same or different, represents hydrogen or a saturated hydrocarbon radical, provided that at least one represents a saturated aliphatic hydrocarbon radical, comprising reacting, unpressurized, at from 110.degree. to 170.degree. C., urea with an amine having a boiling point, under normal pressure, at least 10.degree. C. below the reaction temperature, said amine corresponding to the formula: ##STR2## wherein R and R' are as defined above, and wherein for each mol of urea present, at least one mol of amine is used, the improvement wherein the reaction is carried out in the presence of from 20 to 95% by weight, based on the total quantity of reactants and auxiliary agents, if any, of an organic liquid boiling, under normal pressure, above the reaction temperature, which is inert under the reaction conditions and which serves as a dispersing agent or a solvent for the urea and for the product of the process and is a solvent for the amine.

REFERENCES:
patent: 1785730 (1930-12-01), Davis
patent: 2145242 (1939-01-01), Arnold
patent: 2253528 (1941-08-01), Olin
patent: 2257717 (1941-09-01), Olin
patent: 2611782 (1952-09-01), Bortnick
patent: 3937727 (1976-02-01), Throckmorton et al.
J. Russ. Phys. Chem. Soc. 37 1.
Houben-Weyl Georg Thieme Verlog, Stuttgart, 1952, vol. VIII 153.

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