Process for producing methylol urea solution and process for pro

Details Process for producing methylol urea solution and process for pro Process for producing methylol urea solution and process for pro

1989-04-13

1990-01-23

Warren, Charles F.

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

Organic compounds

Amino nitrogen containing

71 29, C07B 4102, C07C12715

Patent

active

048959839

ABSTRACT:
A process for producing a methylol urea solution which comprises carrying out addition reaction between urea and formaldehyde in the presence of water and an alkali, wherein said alkali is a polyphosphoric acid salt; and a process for producing a slow-releasing nitrogenous fertilizer which comprises subjecting the resulting methylol urea solution to dehydration condensation and drying the resulting condensate are disclosed. The methylol urea solution undergoes no substantial pH variation with time either during or after the addition reaction, and the fertilizer obtained therefrom is excellent in slow-releasing properties.

REFERENCES:
patent: 2321544 (1943-06-01), Dittmar et al.
patent: 2467212 (1949-04-01), Kvalnes
patent: 3649598 (1972-03-01), Namioka et al.
patent: 4173582 (1979-11-01), Greidinger et al.
Chemical Abstracts 39: 178i.sup.4 (1945).
Chemical Abstracts 92: 109888w (1980).
Clark et al., Industrial and Engineering Chemistry, 1178-1183, 40, Jul., 1948.

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