Process for the production of water-free molten urea

Details Process for the production of water-free molten urea Process for the production of water-free molten urea

1976-02-06

1978-01-17

Vertiz, O. R.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260555R, 203 12, C07C12600

Patent

active

040692531

ABSTRACT:
An aqueous urea solution is concentrated to a substantially water-free molten urea by conducting successively a first step of concentrating said aqueous urea solution under the conditions forming a urea slurry and a second step of concentrating said urea slurry under conditions forming a substantially water-free molten urea free from crystalline urea.

REFERENCES:
patent: 1584875 (1926-05-01), Lidholm
patent: 2961464 (1960-11-01), Kaasenbrood
patent: 3124612 (1964-03-01), Cook
patent: 3147174 (1964-09-01), Cook
patent: 3171770 (1965-03-01), Biekart et al.
patent: 3223145 (1965-12-01), Templeton et al.
patent: 3585237 (1971-06-01), Terrana et al.

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