METHOD OF PRODUCING TEREPHTHALIC ACID DIAMIDE Russian patent published in 2011 - IPC C07C233/65 C07C231/02 C07C231/10 

FIELD: chemistry.

SUBSTANCE: invention relates to a novel method of producing terephthalic acid diamide, which can be used in synthesis of polymers, involving reaction of terephthalic acid and urea in stoichiometric ratio, wherein reaction of initial reagents is carried out in solid phase with thorough mixing and simultaneous grinding, at temperature 180-240°C and pressure created by urea decomposition products equal to 5-15 kg/cm² for a time defined from the beginning of the reaction, specifically from the moment given temperature and pressure values are achieved to the moment of spontaneous fall of the reaction pressure, and then holding the reaction mixture for 1-3 hours.

EFFECT: simple, single-step method without use of aggressive reagents, characterised by high output of high-quality diamide and no formation of additional wastes.

1 cl, 7 ex