Method for manufacturing nitrogen-containing compounds

摘要

The invention is directed to the making of solid alkylidene diurea and conducting the reaction between urea and an aldehyde by controlling the ratio of aldehyde to urea fed to a reactor so as to balance the heat evolved in the reaction between the aldehyde and urea with the latent heat of evaporation of excess of aldehyde, whereby the temperature of the reaction is maintained within predetermined limits. The product is of high purity and the yield is high.