Patent ID: 11858903
Assignee: CASALE SA
Field: Organic fine chemistry (Chemistry)
Classification: CPC C | IPC C

Claim 15:
16. A melamine plant, comprising a melamine synthesis reactor where urea is converted to melamine with formation of offgas containing ammonia, carbon dioxide and melamine, and a quencher where said offgas are quenched to recover melamine contained therein, wherein said quencher comprises:
an offgas inlet;
at least one sprayer of liquid ammonia, which is above the offgas inlet;
an inlet for a liquid solvent located in a bottom portion of the quencher below the offgas inlet;
an outlet for withdrawing washed offgas, which is located in the upper part of the quencher;
an outlet for a solution or slurry containing melamine removed from the offgas, which is located at the bottom of the quencher.