Title:
METHOD FOR PURIFYING MELAMINE
Document Type and Number:
WIPO Patent Application WO2000039107
Kind Code:
A8
Abstract:
The invention relates to a method for purifying melamine in which impure melamine is heated to a temperature range above 325 DEG C but lower than the melting point of melamine which depends on the prevailing ammonia pressure. In addition, the impure melamine is held in said temperature range under an ammonia pressure ranging from 1 to 150 bar for a duration lasting from 1 minute up to 20 hours. The melamine is provided in solid form. Afterwards, the melamine is relieved from pressure and cooled in any order.
Inventors:
COUFAL GERHARD (AT)
Application Number:
PCT/EP1999/010008
Publication Date:
August 24, 2000
Filing Date:
December 16, 1999
Export Citation:
Assignee:
AGROLINZ MELAMIN GMBH (AT)
COUFAL GERHARD (AT)
COUFAL GERHARD (AT)
International Classes:
C07D251/62; (IPC1-7): C07D251/62
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