Process for the production of melamine
AssigneeAgrolinz Melamin GmbH
InventorsHartmut Bucka, Gerhard Coufal, Ferdinand Koglgruber
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Abstract
A process for the production of melamine by pyrolysis of urea in a high-pressure reactor having a vertical central pipe is provided. The melamine flows upwards into the reactor from below, mixes in the lower part of the reactor with a urea melt, and optionally NH3, introduced into the reactor from below, and emerges from the central pipe in the upper part of the central pipe. Part of the melamine formed flows downward in the annular space between the central pipe and reactor wall, and the remainder is expelled for further work-up. The off-gases are removed at the top of the reactor. A reactor for carrying out the process is also provided.
Claims7
A reactor for the production of melamine by pyrolysis of urea, comprising:
- a vertical reactor body having a central pipe,
- feed lines for urea melt and optionally NH3 installed in a lower part of the reactor,
- drain lines for melamine melt formed and for off-gases comprising NH3 and CO2 in an upper part of the reactor, and
- heating appliances and optionally measuring and control appliances, wherein one or more outlet openings for the supply of urea melt and optionally NH3 are arranged in the lower part of the reactor and within the central pipe.
Dependencies are inferred from the claim text.